mirror of
https://github.com/k2-fsa/icefall.git
synced 2025-08-12 19:42:19 +00:00
Remove optional silence (SIL).
This commit is contained in:
Fangjun Kuang
parent
31b3e5b27a
commit
5390ced2d1
@ -61,29 +61,6 @@ def get_parser():
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help="Should various information be logged in tensorboard.",
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)
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parser.add_argument(
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"--use-ali-model",
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type=str2bool,
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default=False,
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help="If true, we assume that you have run tdnn_lstm_ctc/train_bpe.py "
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"and you have some checkpoints inside the directory "
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"tdnn_lstm_ctc/exp_bpe_500 ."
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"It will use tdnn_lstm_ctc/exp_bpe_500/epoch-{ali-model-epoch}.pt "
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"as the pre-trained alignment model",
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)
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parser.add_argument(
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"--ali-model-epoch",
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type=int,
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default=19,
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help="If --use-ali-model is True, load "
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"tdnn_lstm_ctc/exp_bpe_500/epoch-{ali-model-epoch}.pt as "
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"the alignment model."
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"Used only if --use-ali-model is True.",
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)
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# TODO: add extra arguments and support DDP training.
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# Currently, only single GPU training is implemented. Will add
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# DDP training once single GPU training is finished.
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return parser
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@ -158,7 +135,7 @@ def get_params() -> AttributeDict:
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"use_pruned_intersect": False,
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"den_scale": 1.0,
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#
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"att_rate": 0,
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"att_rate": 0, # If not zero, use attention decoder
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"attention_dim": 512,
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"nhead": 8,
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"num_decoder_layers": 0,
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@ -166,7 +143,6 @@ def get_params() -> AttributeDict:
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"use_feat_batchnorm": True,
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"lr_factor": 5.0,
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"warm_step": 80000,
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# "warm_step": 10000,
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}
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)
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@ -260,10 +236,9 @@ def save_checkpoint(
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copyfile(src=filename, dst=best_valid_filename)
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def compute_loss_impl(
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def compute_loss(
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params: AttributeDict,
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model: nn.Module,
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ali_model: Optional[nn.Module],
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batch: dict,
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graph_compiler: MmiTrainingGraphCompiler,
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is_training: bool,
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@ -296,22 +271,6 @@ def compute_loss_impl(
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with torch.set_grad_enabled(is_training):
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nnet_output, encoder_memory, memory_mask = model(feature, supervisions)
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# nnet_output is [N, T, C]
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if ali_model is not None and params.batch_idx_train < 4000:
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feature = feature.permute(0, 2, 1) # [N, T, C]->[N, C, T]
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ali_model_output = ali_model(feature)
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# subsampling is done slightly differently, may be small length
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# differences.
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min_len = min(ali_model_output.shape[1], nnet_output.shape[1])
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# scale less than one so it will be encouraged
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# to mimic ali_model's output
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ali_model_scale = 500.0 / (params.batch_idx_train + 500)
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# Use clone() here or log-softmax backprop will fail.
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nnet_output = nnet_output.clone()
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nnet_output[:, :min_len, :] += (
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ali_model_scale * ali_model_output[:, :min_len, :]
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)
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# NOTE: We need `encode_supervisions` to sort sequences with
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# different duration in decreasing order, required by
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@ -374,58 +333,9 @@ def compute_loss_impl(
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return loss, mmi_loss.detach(), att_loss.detach()
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def compute_loss(
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params: AttributeDict,
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model: nn.Module,
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ali_model: Optional[nn.Module],
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batch: dict,
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graph_compiler: MmiTrainingGraphCompiler,
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is_training: bool,
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):
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try:
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return compute_loss_impl(
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params=params,
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model=model,
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ali_model=ali_model,
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batch=batch,
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graph_compiler=graph_compiler,
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is_training=is_training,
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)
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except RuntimeError as ex:
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if "out of memory" not in str(ex):
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raise ex
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logging.exception(ex)
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s = f"\nCaught exception: {str(ex)}\n"
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total_duration = 0.0
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max_cut_duration = 0.0
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for cut in batch["supervisions"]["cut"]:
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s += f" id: {cut.id}, duration: {cut.duration} seconds\n"
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total_duration += cut.duration
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max_cut_duration = max(max_cut_duration, cut.duration)
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s += f" total duration: {total_duration:.3f} s\n"
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s += f" max duration: {max_cut_duration:.3f} s \n"
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logging.info(s)
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torch.cuda.empty_cache()
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gc.collect()
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# See https://github.com/pytorch/pytorch/issues/18853#issuecomment-583779161
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return compute_loss_impl(
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params=params,
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model=model,
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ali_model=ali_model,
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batch=params.saved_batch,
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graph_compiler=graph_compiler,
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is_training=is_training,
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)
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def compute_validation_loss(
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params: AttributeDict,
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model: nn.Module,
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ali_model: Optional[nn.Module],
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graph_compiler: MmiTrainingGraphCompiler,
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valid_dl: torch.utils.data.DataLoader,
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world_size: int = 1,
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@ -443,7 +353,6 @@ def compute_validation_loss(
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loss, mmi_loss, att_loss = compute_loss(
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params=params,
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model=model,
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ali_model=ali_model,
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batch=batch,
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graph_compiler=graph_compiler,
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is_training=False,
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@ -484,7 +393,6 @@ def compute_validation_loss(
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def train_one_epoch(
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params: AttributeDict,
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model: nn.Module,
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ali_model: Optional[nn.Module],
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optimizer: torch.optim.Optimizer,
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graph_compiler: MmiTrainingGraphCompiler,
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train_dl: torch.utils.data.DataLoader,
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@ -503,9 +411,6 @@ def train_one_epoch(
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It is returned by :func:`get_params`.
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model:
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The model for training.
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ali_model:
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The force alignment model for training. It is from
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tdnn_lstm_ctc/train_bpe.py
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optimizer:
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The optimizer we are using.
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graph_compiler:
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@ -529,18 +434,12 @@ def train_one_epoch(
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params.tot_loss = 0.0
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params.tot_frames = 0.0
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for batch_idx, batch in enumerate(train_dl):
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if batch_idx == 0:
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logging.info("save a batch for OOM handling")
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# Use this batch to replace the batch that's causing OOM
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params.saved_batch = batch
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params.batch_idx_train += 1
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batch_size = len(batch["supervisions"]["text"])
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loss, mmi_loss, att_loss = compute_loss(
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params=params,
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model=model,
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ali_model=ali_model,
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batch=batch,
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graph_compiler=graph_compiler,
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is_training=True,
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@ -632,7 +531,6 @@ def train_one_epoch(
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compute_validation_loss(
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params=params,
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model=model,
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ali_model=ali_model,
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graph_compiler=graph_compiler,
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valid_dl=valid_dl,
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world_size=world_size,
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@ -669,9 +567,6 @@ def train_one_epoch(
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params.best_train_epoch = params.cur_epoch
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params.best_train_loss = params.train_loss
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if "saved_batch" in params:
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del params["saved_batch"]
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def run(rank, world_size, args):
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"""
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@ -745,35 +640,6 @@ def run(rank, world_size, args):
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if checkpoints and checkpoints["optimizer"]:
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optimizer.load_state_dict(checkpoints["optimizer"])
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assert args.use_ali_model is False
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if args.use_ali_model:
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ali_model = TdnnLstm(
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num_features=params.feature_dim,
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num_classes=num_classes,
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subsampling_factor=params.subsampling_factor,
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)
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# TODO: add an option to switch among
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# bpe_500, bpe_1000, and bpe_5000
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ali_model_fname = Path(
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f"tdnn_lstm_ctc/exp_bpe_500/epoch-{args.ali_model_epoch}.pt"
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)
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assert (
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ali_model_fname.is_file()
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), f"ali model filename {ali_model_fname} does not exist!"
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ali_model.load_state_dict(
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torch.load(ali_model_fname, map_location="cpu")["model"]
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)
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ali_model.to(device)
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ali_model.eval()
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ali_model.requires_grad_(False)
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logging.info(f"Use ali_model: {ali_model_fname}")
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else:
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ali_model = None
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logging.info("No ali_model")
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librispeech = LibriSpeechAsrDataModule(args)
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train_dl = librispeech.train_dataloaders()
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valid_dl = librispeech.valid_dataloaders()
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@ -796,7 +662,6 @@ def run(rank, world_size, args):
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train_one_epoch(
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params=params,
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model=model,
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ali_model=ali_model,
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optimizer=optimizer,
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graph_compiler=graph_compiler,
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train_dl=train_dl,
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1
egs/librispeech/ASR/local/.gitignore
vendored
Normal file
1
egs/librispeech/ASR/local/.gitignore
vendored
Normal file
@ -0,0 +1 @@
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tmp_lang
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@ -8,8 +8,8 @@ for LM training with the help of a lexicon.
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If the lexicon contains phones, the resulting LM will be a phone LM; If the
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lexicon contains word pieces, the resulting LM will be a word piece LM.
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If a word has multiple pronunciations, the one that appears last in the lexicon
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is used.
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If a word has multiple pronunciations, the one that appears first in the lexicon
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is kept; others are removed.
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If the input transcript is:
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@ -20,8 +20,8 @@ If the input transcript is:
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and if the lexicon is
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<UNK> SPN
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hello h e l l o
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hello h e l l o 2
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hello h e l l o
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world w o r l d
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zoo z o o
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@ -36,6 +36,8 @@ import argparse
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from pathlib import Path
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from typing import Dict, List
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from generate_unique_lexicon import filter_multiple_pronunications
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from icefall.lexicon import read_lexicon
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@ -87,8 +89,10 @@ def main():
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assert Path(args.transcript).is_file()
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assert len(args.oov) > 0
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# Only the last pronunciation of a word is kept
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lexicon = dict(read_lexicon(args.lexicon))
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# Only the first pronunciation of a word is kept
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lexicon = filter_multiple_pronunications(read_lexicon(args.lexicon))
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lexicon = dict(lexicon)
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assert args.oov in lexicon
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@ -25,7 +25,7 @@ This file downloads the following LibriSpeech LM files:
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- librispeech-lexicon.txt
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from http://www.openslr.org/resources/11
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and save them in the user provided directory.
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and saves them in the user provided directory.
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Files are not re-downloaded if they already exist.
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100
egs/librispeech/ASR/local/generate_unique_lexicon.py
Executable file
100
egs/librispeech/ASR/local/generate_unique_lexicon.py
Executable file
@ -0,0 +1,100 @@
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#!/usr/bin/env python3
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# Copyright 2021 Xiaomi Corp. (authors: Fangjun Kuang)
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#
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# See ../../../../LICENSE for clarification regarding multiple authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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This file takes as input a lexicon.txt and output a new lexicon,
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in which each word has a unique pronunciation.
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The way to do this is to keep only the first pronunciation of a word
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in lexicon.txt.
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"""
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import argparse
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import logging
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from pathlib import Path
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from typing import List, Tuple
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from icefall.lexicon import read_lexicon, write_lexicon
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def get_args():
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"--lang-dir",
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type=str,
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help="""Input and output directory.
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It should contain a file lexicon.txt.
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This file will generate a new file uniq_lexicon.txt
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in it.
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""",
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)
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return parser.parse_args()
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def filter_multiple_pronunications(
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lexicon: List[Tuple[str, List[str]]]
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) -> List[Tuple[str, List[str]]]:
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"""Remove multiple pronunciations of words from a lexicon.
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If a word has more than one pronunciation in the lexicon, only
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the first one is kept, while other pronunciations are removed
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from the lexicon.
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Args:
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lexicon:
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The input lexicon, containing a list of (word, [p1, p2, ..., pn]),
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where "p1, p2, ..., pn" are the pronunciations of the "word".
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Returns:
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Return a new lexicon where each word has a unique pronunciation.
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"""
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seen = set()
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ans = []
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for word, tokens in lexicon:
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if word in seen:
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continue
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seen.add(word)
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ans.append((word, tokens))
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return ans
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def main():
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args = get_args()
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lang_dir = Path(args.lang_dir)
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lexicon_filename = lang_dir / "lexicon.txt"
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in_lexicon = read_lexicon(lexicon_filename)
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out_lexicon = filter_multiple_pronunications(in_lexicon)
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write_lexicon(lang_dir / "uniq_lexicon.txt", out_lexicon)
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logging.info(f"Number of entries in lexicon.txt: {len(in_lexicon)}")
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logging.info(f"Number of entries in uniq_lexicon.txt: {len(out_lexicon)}")
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if __name__ == "__main__":
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formatter = (
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"%(asctime)s %(levelname)s [%(filename)s:%(lineno)d] %(message)s"
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)
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logging.basicConfig(format=formatter, level=logging.INFO)
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main()
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@ -17,8 +17,9 @@
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"""
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This script takes as input a lexicon file "data/lang_phone/lexicon.txt"
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consisting of words and tokens (i.e., phones) and does the following:
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This script takes as input a `lang_dir`, which is expected to contain
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a lexicon file "lexicon.txt" consisting of words and tokens (i.e., phones)
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and does the following:
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1. Add disambiguation symbols to the lexicon and generate lexicon_disambig.txt
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@ -36,11 +37,12 @@ consisting of words and tokens (i.e., phones) and does the following:
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The generated files are saved into `lang_dir`.
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"""
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import argparse
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import math
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from collections import defaultdict
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from pathlib import Path
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from typing import Any, Dict, List, Tuple
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from icefall.utils import str2bool
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import k2
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import torch
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@ -55,7 +57,22 @@ def get_args():
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"--lang-dir",
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type=str,
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help="""Input and output directory.
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It should contain a file lexicon.txt
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It should contain a file lexicon.txt.
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Generated files by this script are saved into this directory.
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""",
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)
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parser.add_argument(
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"--debug",
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type=str2bool,
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default=False,
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help="""True for debugging, which will generate
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a visualization of the lexicon FST.
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Caution: If your lexicon contains hundreds of thousands
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of lines, please set it to False!
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See "local/test_prepare_lang.sh" for usage.
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""",
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)
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@ -85,6 +102,10 @@ def write_mapping(filename: str, sym2id: Dict[str, int]) -> None:
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def get_tokens(lexicon: Lexicon) -> List[str]:
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"""Get tokens from a lexicon.
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If pronunciations are phones, then tokens are phones.
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If pronunciations are word pieces, then tokens are word pieces.
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Args:
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lexicon:
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It is the return value of :func:`read_lexicon`.
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@ -208,6 +229,9 @@ def add_self_loops(
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The input label of a self-loop is `disambig_token`, while the output
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label is `disambig_word`.
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Caution:
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Don't be confused with :func:`k2.add_epsilon_self_loops`.
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Args:
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arcs:
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A list-of-list. The sublist contains
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@ -237,12 +261,9 @@ def lexicon_to_fst(
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lexicon: Lexicon,
|
||||
token2id: Dict[str, int],
|
||||
word2id: Dict[str, int],
|
||||
sil_token: str = "SIL",
|
||||
sil_prob: float = 0.5,
|
||||
need_self_loops: bool = False,
|
||||
) -> k2.Fsa:
|
||||
"""Convert a lexicon to an FST (in k2 format) with optional silence at
|
||||
the beginning and end of each word.
|
||||
"""Convert a lexicon to an FST (in k2 format).
|
||||
|
||||
Args:
|
||||
lexicon:
|
||||
@ -251,11 +272,6 @@ def lexicon_to_fst(
|
||||
A dict mapping tokens to IDs.
|
||||
word2id:
|
||||
A dict mapping words to IDs.
|
||||
sil_token:
|
||||
The silence token.
|
||||
sil_prob:
|
||||
The probability for adding a silence at the beginning and end
|
||||
of the word.
|
||||
need_self_loops:
|
||||
If True, add self-loop to states with non-epsilon output symbols
|
||||
on at least one arc out of the state. The input label for this
|
||||
@ -263,50 +279,43 @@ def lexicon_to_fst(
|
||||
Returns:
|
||||
Return an instance of `k2.Fsa` representing the given lexicon.
|
||||
"""
|
||||
assert sil_prob > 0.0 and sil_prob < 1.0
|
||||
# CAUTION: we use score, i.e, negative cost.
|
||||
sil_score = math.log(sil_prob)
|
||||
no_sil_score = math.log(1.0 - sil_prob)
|
||||
loop_state = 0 # words enter and leave from here
|
||||
next_state = 1 # the next un-allocated state, will be incremented as we go
|
||||
|
||||
start_state = 0
|
||||
loop_state = 1 # words enter and leave from here
|
||||
sil_state = 2 # words terminate here when followed by silence; this state
|
||||
# has a silence transition to loop_state.
|
||||
next_state = 3 # the next un-allocated state, will be incremented as we go.
|
||||
arcs = []
|
||||
|
||||
assert token2id["<eps>"] == 0
|
||||
if "<blk>" in token2id:
|
||||
# For BPE based lexicon
|
||||
# The blank symbol <blk> is defined in local/train_bpe_model.py
|
||||
assert token2id["<blk>"] == 0
|
||||
else:
|
||||
# For phone based lexicon in the CTC topo,
|
||||
# 0 on the left side (i.e., as label) indicates a blank.
|
||||
# 0 on the right side (i.e., as aux_label) represents an epsilon
|
||||
assert token2id["<eps>"] == 0
|
||||
|
||||
assert word2id["<eps>"] == 0
|
||||
|
||||
eps = 0
|
||||
|
||||
sil_token = token2id[sil_token]
|
||||
|
||||
arcs.append([start_state, loop_state, eps, eps, no_sil_score])
|
||||
arcs.append([start_state, sil_state, eps, eps, sil_score])
|
||||
arcs.append([sil_state, loop_state, sil_token, eps, 0])
|
||||
|
||||
for word, tokens in lexicon:
|
||||
assert len(tokens) > 0, f"{word} has no pronunciations"
|
||||
for word, pieces in lexicon:
|
||||
assert len(pieces) > 0, f"{word} has no pronunciations"
|
||||
cur_state = loop_state
|
||||
|
||||
word = word2id[word]
|
||||
tokens = [token2id[i] for i in tokens]
|
||||
pieces = [token2id[i] for i in pieces]
|
||||
|
||||
for i in range(len(tokens) - 1):
|
||||
for i in range(len(pieces) - 1):
|
||||
w = word if i == 0 else eps
|
||||
arcs.append([cur_state, next_state, tokens[i], w, 0])
|
||||
arcs.append([cur_state, next_state, pieces[i], w, 0])
|
||||
|
||||
cur_state = next_state
|
||||
next_state += 1
|
||||
|
||||
# now for the last token of this word
|
||||
# It has two out-going arcs, one to the loop state,
|
||||
# the other one to the sil_state.
|
||||
i = len(tokens) - 1
|
||||
# now for the last piece of this word
|
||||
i = len(pieces) - 1
|
||||
w = word if i == 0 else eps
|
||||
arcs.append([cur_state, loop_state, tokens[i], w, no_sil_score])
|
||||
arcs.append([cur_state, sil_state, tokens[i], w, sil_score])
|
||||
arcs.append([cur_state, loop_state, pieces[i], w, 0])
|
||||
|
||||
if need_self_loops:
|
||||
disambig_token = token2id["#0"]
|
||||
@ -335,8 +344,6 @@ def main():
|
||||
lang_dir = Path(args.lang_dir)
|
||||
|
||||
lexicon_filename = lang_dir / "lexicon.txt"
|
||||
sil_token = "SIL"
|
||||
sil_prob = 0.5
|
||||
|
||||
lexicon = read_lexicon(lexicon_filename)
|
||||
tokens = get_tokens(lexicon)
|
||||
@ -370,21 +377,29 @@ def main():
|
||||
lexicon,
|
||||
token2id=token2id,
|
||||
word2id=word2id,
|
||||
sil_token=sil_token,
|
||||
sil_prob=sil_prob,
|
||||
)
|
||||
|
||||
L_disambig = lexicon_to_fst(
|
||||
lexicon_disambig,
|
||||
token2id=token2id,
|
||||
word2id=word2id,
|
||||
sil_token=sil_token,
|
||||
sil_prob=sil_prob,
|
||||
need_self_loops=True,
|
||||
)
|
||||
torch.save(L.as_dict(), lang_dir / "L.pt")
|
||||
torch.save(L_disambig.as_dict(), lang_dir / "L_disambig.pt")
|
||||
|
||||
if args.debug:
|
||||
labels_sym = k2.SymbolTable.from_file(lang_dir / "tokens.txt")
|
||||
aux_labels_sym = k2.SymbolTable.from_file(lang_dir / "words.txt")
|
||||
|
||||
L.labels_sym = labels_sym
|
||||
L.aux_labels_sym = aux_labels_sym
|
||||
L.draw(f"{lang_dir / 'L.svg'}", title="L.pt")
|
||||
|
||||
L_disambig.labels_sym = labels_sym
|
||||
L_disambig.aux_labels_sym = aux_labels_sym
|
||||
L_disambig.draw(f"{lang_dir / 'L_disambig.svg'}", title="L_disambig.pt")
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
|
||||
@ -44,86 +44,12 @@ import torch
|
||||
from prepare_lang import (
|
||||
Lexicon,
|
||||
add_disambig_symbols,
|
||||
add_self_loops,
|
||||
lexicon_to_fst,
|
||||
write_lexicon,
|
||||
write_mapping,
|
||||
)
|
||||
|
||||
|
||||
def lexicon_to_fst_no_sil(
|
||||
lexicon: Lexicon,
|
||||
token2id: Dict[str, int],
|
||||
word2id: Dict[str, int],
|
||||
need_self_loops: bool = False,
|
||||
) -> k2.Fsa:
|
||||
"""Convert a lexicon to an FST (in k2 format).
|
||||
|
||||
Args:
|
||||
lexicon:
|
||||
The input lexicon. See also :func:`read_lexicon`
|
||||
token2id:
|
||||
A dict mapping tokens to IDs.
|
||||
word2id:
|
||||
A dict mapping words to IDs.
|
||||
need_self_loops:
|
||||
If True, add self-loop to states with non-epsilon output symbols
|
||||
on at least one arc out of the state. The input label for this
|
||||
self loop is `token2id["#0"]` and the output label is `word2id["#0"]`.
|
||||
Returns:
|
||||
Return an instance of `k2.Fsa` representing the given lexicon.
|
||||
"""
|
||||
loop_state = 0 # words enter and leave from here
|
||||
next_state = 1 # the next un-allocated state, will be incremented as we go
|
||||
|
||||
arcs = []
|
||||
|
||||
# The blank symbol <blk> is defined in local/train_bpe_model.py
|
||||
assert token2id["<blk>"] == 0
|
||||
assert word2id["<eps>"] == 0
|
||||
|
||||
eps = 0
|
||||
|
||||
for word, pieces in lexicon:
|
||||
assert len(pieces) > 0, f"{word} has no pronunciations"
|
||||
cur_state = loop_state
|
||||
|
||||
word = word2id[word]
|
||||
pieces = [token2id[i] for i in pieces]
|
||||
|
||||
for i in range(len(pieces) - 1):
|
||||
w = word if i == 0 else eps
|
||||
arcs.append([cur_state, next_state, pieces[i], w, 0])
|
||||
|
||||
cur_state = next_state
|
||||
next_state += 1
|
||||
|
||||
# now for the last piece of this word
|
||||
i = len(pieces) - 1
|
||||
w = word if i == 0 else eps
|
||||
arcs.append([cur_state, loop_state, pieces[i], w, 0])
|
||||
|
||||
if need_self_loops:
|
||||
disambig_token = token2id["#0"]
|
||||
disambig_word = word2id["#0"]
|
||||
arcs = add_self_loops(
|
||||
arcs,
|
||||
disambig_token=disambig_token,
|
||||
disambig_word=disambig_word,
|
||||
)
|
||||
|
||||
final_state = next_state
|
||||
arcs.append([loop_state, final_state, -1, -1, 0])
|
||||
arcs.append([final_state])
|
||||
|
||||
arcs = sorted(arcs, key=lambda arc: arc[0])
|
||||
arcs = [[str(i) for i in arc] for arc in arcs]
|
||||
arcs = [" ".join(arc) for arc in arcs]
|
||||
arcs = "\n".join(arcs)
|
||||
|
||||
fsa = k2.Fsa.from_str(arcs, acceptor=False)
|
||||
return fsa
|
||||
|
||||
|
||||
def generate_lexicon(
|
||||
model_file: str, words: List[str]
|
||||
) -> Tuple[Lexicon, Dict[str, int]]:
|
||||
@ -206,13 +132,13 @@ def main():
|
||||
write_lexicon(lang_dir / "lexicon.txt", lexicon)
|
||||
write_lexicon(lang_dir / "lexicon_disambig.txt", lexicon_disambig)
|
||||
|
||||
L = lexicon_to_fst_no_sil(
|
||||
L = lexicon_to_fst(
|
||||
lexicon,
|
||||
token2id=token_sym_table,
|
||||
word2id=word_sym_table,
|
||||
)
|
||||
|
||||
L_disambig = lexicon_to_fst_no_sil(
|
||||
L_disambig = lexicon_to_fst(
|
||||
lexicon_disambig,
|
||||
token2id=token_sym_table,
|
||||
word2id=word_sym_table,
|
||||
|
||||
@ -1,106 +0,0 @@
|
||||
#!/usr/bin/env python3
|
||||
# Copyright 2021 Xiaomi Corp. (authors: Fangjun Kuang)
|
||||
#
|
||||
# See ../../../../LICENSE for clarification regarding multiple authors
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
|
||||
# Copyright (c) 2021 Xiaomi Corporation (authors: Fangjun Kuang)
|
||||
|
||||
import os
|
||||
import tempfile
|
||||
|
||||
import k2
|
||||
from prepare_lang import (
|
||||
add_disambig_symbols,
|
||||
generate_id_map,
|
||||
get_phones,
|
||||
get_words,
|
||||
lexicon_to_fst,
|
||||
read_lexicon,
|
||||
write_lexicon,
|
||||
write_mapping,
|
||||
)
|
||||
|
||||
|
||||
def generate_lexicon_file() -> str:
|
||||
fd, filename = tempfile.mkstemp()
|
||||
os.close(fd)
|
||||
s = """
|
||||
!SIL SIL
|
||||
<SPOKEN_NOISE> SPN
|
||||
<UNK> SPN
|
||||
f f
|
||||
a a
|
||||
foo f o o
|
||||
bar b a r
|
||||
bark b a r k
|
||||
food f o o d
|
||||
food2 f o o d
|
||||
fo f o
|
||||
""".strip()
|
||||
with open(filename, "w") as f:
|
||||
f.write(s)
|
||||
return filename
|
||||
|
||||
|
||||
def test_read_lexicon(filename: str):
|
||||
lexicon = read_lexicon(filename)
|
||||
phones = get_phones(lexicon)
|
||||
words = get_words(lexicon)
|
||||
print(lexicon)
|
||||
print(phones)
|
||||
print(words)
|
||||
lexicon_disambig, max_disambig = add_disambig_symbols(lexicon)
|
||||
print(lexicon_disambig)
|
||||
print("max disambig:", f"#{max_disambig}")
|
||||
|
||||
phones = ["<eps>", "SIL", "SPN"] + phones
|
||||
for i in range(max_disambig + 1):
|
||||
phones.append(f"#{i}")
|
||||
words = ["<eps>"] + words
|
||||
|
||||
phone2id = generate_id_map(phones)
|
||||
word2id = generate_id_map(words)
|
||||
|
||||
print(phone2id)
|
||||
print(word2id)
|
||||
|
||||
write_mapping("phones.txt", phone2id)
|
||||
write_mapping("words.txt", word2id)
|
||||
|
||||
write_lexicon("a.txt", lexicon)
|
||||
write_lexicon("a_disambig.txt", lexicon_disambig)
|
||||
|
||||
fsa = lexicon_to_fst(lexicon, phone2id=phone2id, word2id=word2id)
|
||||
fsa.labels_sym = k2.SymbolTable.from_file("phones.txt")
|
||||
fsa.aux_labels_sym = k2.SymbolTable.from_file("words.txt")
|
||||
fsa.draw("L.pdf", title="L")
|
||||
|
||||
fsa_disambig = lexicon_to_fst(
|
||||
lexicon_disambig, phone2id=phone2id, word2id=word2id
|
||||
)
|
||||
fsa_disambig.labels_sym = k2.SymbolTable.from_file("phones.txt")
|
||||
fsa_disambig.aux_labels_sym = k2.SymbolTable.from_file("words.txt")
|
||||
fsa_disambig.draw("L_disambig.pdf", title="L_disambig")
|
||||
|
||||
|
||||
def main():
|
||||
filename = generate_lexicon_file()
|
||||
test_read_lexicon(filename)
|
||||
os.remove(filename)
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
37
egs/librispeech/ASR/local/test_prepare_lang.sh
Executable file
37
egs/librispeech/ASR/local/test_prepare_lang.sh
Executable file
@ -0,0 +1,37 @@
|
||||
#!/usr/bin/env bash
|
||||
|
||||
lang_dir=tmp_lang
|
||||
mkdir -p $lang_dir
|
||||
cat <<EOF > $lang_dir/lexicon.txt
|
||||
<UNK> SPN
|
||||
f f
|
||||
a a
|
||||
foo f o o
|
||||
bar b a r
|
||||
bark b a r k
|
||||
food f o o d
|
||||
food2 f o o d
|
||||
fo f o
|
||||
fo f o o
|
||||
EOF
|
||||
|
||||
./prepare_lang.py --lang-dir $lang_dir --debug 1
|
||||
./generate_unique_lexicon.py --lang-dir $lang_dir
|
||||
|
||||
cat <<EOF > $lang_dir/transcript_words.txt
|
||||
foo bar bark food food2 fo f a foo bar
|
||||
bar food2 fo bark
|
||||
EOF
|
||||
|
||||
./convert_transcript_words_to_tokens.py \
|
||||
--lexicon $lang_dir/uniq_lexicon.txt \
|
||||
--transcript $lang_dir/transcript_words.txt \
|
||||
--oov "<UNK>" \
|
||||
> $lang_dir/transcript_tokens.txt
|
||||
|
||||
../shared/make_kn_lm.py \
|
||||
-ngram-order 2 \
|
||||
-text $lang_dir/transcript_tokens.txt \
|
||||
-lm $lang_dir/P.arpa
|
||||
|
||||
echo "Please delete the directory '$lang_dir' manually"
|
||||
@ -38,7 +38,7 @@ def get_args():
|
||||
"--lang-dir",
|
||||
type=str,
|
||||
help="""Input and output directory.
|
||||
It should contain the training corpus: train.txt.
|
||||
It should contain the training corpus: transcript_words.txt.
|
||||
The generated bpe.model is saved to this directory.
|
||||
""",
|
||||
)
|
||||
@ -59,7 +59,7 @@ def main():
|
||||
model_type = "unigram"
|
||||
|
||||
model_prefix = f"{lang_dir}/{model_type}_{vocab_size}"
|
||||
train_text = f"{lang_dir}/train.txt"
|
||||
train_text = f"{lang_dir}/transcript_words.txt"
|
||||
character_coverage = 1.0
|
||||
input_sentence_size = 100000000
|
||||
|
||||
|
||||
@ -116,16 +116,18 @@ if [ $stage -le 5 ] && [ $stop_stage -ge 5 ]; then
|
||||
lang_dir=data/lang_phone
|
||||
mkdir -p $lang_dir
|
||||
|
||||
(echo '!SIL SIL'; echo '<SPOKEN_NOISE> SPN'; echo '<UNK> SPN'; ) |
|
||||
echo '<UNK> SPN' |
|
||||
cat - $dl_dir/lm/librispeech-lexicon.txt |
|
||||
sort | uniq > $lang_dir/lexicon.txt
|
||||
|
||||
./local/generate_unique_lexicon.py --lang-dir $lang_dir
|
||||
|
||||
if [ ! -f $lang_dir/L_disambig.pt ]; then
|
||||
./local/prepare_lang.py --lang-dir $lang_dir
|
||||
fi
|
||||
|
||||
# Train a bigram P for MMI training
|
||||
if [ ! -f $lang_dir/train.txt ]; then
|
||||
if [ ! -f $lang_dir/transcript_words.txt ]; then
|
||||
log "Generate data to train phone based bigram P"
|
||||
files=$(
|
||||
find -L "$dl_dir/LibriSpeech/train-clean-100" -name "*.trans.txt"
|
||||
@ -134,30 +136,21 @@ if [ $stage -le 5 ] && [ $stop_stage -ge 5 ]; then
|
||||
)
|
||||
for f in ${files[@]}; do
|
||||
cat $f | cut -d " " -f 2-
|
||||
done > $lang_dir/train.txt
|
||||
done > $lang_dir/transcript_words.txt
|
||||
fi
|
||||
|
||||
if [ ! -f $lang_dir/train_with_sil.txt ]; then
|
||||
./local/add_silence_to_transcript.py \
|
||||
--transcript $lang_dir/train.txt \
|
||||
--sil-word "!SIL" \
|
||||
--sil-prob 0.5 \
|
||||
--seed 20210823 \
|
||||
> $lang_dir/train_with_sil.txt
|
||||
fi
|
||||
|
||||
if [ ! -f $lang_dir/corpus.txt ]; then
|
||||
./local/convert_transcript_to_corpus.py \
|
||||
--lexicon $lang_dir/lexicon.txt \
|
||||
--transcript $lang_dir/train_with_sil.txt \
|
||||
if [ ! -f $lang_dir/transcript_tokens.txt ]; then
|
||||
./local/convert_transcript_words_to_tokens.py \
|
||||
--lexicon $lang_dir/uniq_lexicon.txt \
|
||||
--transcript $lang_dir/transcript_words.txt \
|
||||
--oov "<UNK>" \
|
||||
> $lang_dir/corpus.txt
|
||||
> $lang_dir/transcript_tokens.txt
|
||||
fi
|
||||
|
||||
if [ ! -f $lang_dir/P.arpa ]; then
|
||||
./shared/make_kn_lm.py \
|
||||
-ngram-order 2 \
|
||||
-text $lang_dir/corpus.txt \
|
||||
-text $lang_dir/transcript_tokens.txt \
|
||||
-lm $lang_dir/P.arpa
|
||||
fi
|
||||
|
||||
@ -180,7 +173,7 @@ if [ $stage -le 6 ] && [ $stop_stage -ge 6 ]; then
|
||||
# so that the two can share G.pt later.
|
||||
cp data/lang_phone/words.txt $lang_dir
|
||||
|
||||
if [ ! -f $lang_dir/train.txt ]; then
|
||||
if [ ! -f $lang_dir/transcript_words.txt ]; then
|
||||
log "Generate data for BPE training"
|
||||
files=$(
|
||||
find "$dl_dir/LibriSpeech/train-clean-100" -name "*.trans.txt"
|
||||
@ -189,7 +182,7 @@ if [ $stage -le 6 ] && [ $stop_stage -ge 6 ]; then
|
||||
)
|
||||
for f in ${files[@]}; do
|
||||
cat $f | cut -d " " -f 2-
|
||||
done > $lang_dir/train.txt
|
||||
done > $lang_dir/transcript_words.txt
|
||||
fi
|
||||
|
||||
./local/train_bpe_model.py \
|
||||
@ -204,7 +197,7 @@ fi
|
||||
|
||||
if [ $stage -le 7 ] && [ $stop_stage -ge 7 ]; then
|
||||
log "Stage 7: Prepare G"
|
||||
# We assume you have install kaldilm, if not, please install
|
||||
# We assume you have installed kaldilm, if not, please install
|
||||
# it using: pip install kaldilm
|
||||
|
||||
mkdir -p data/lm
|
||||
@ -237,4 +230,4 @@ if [ $stage -le 8 ] && [ $stop_stage -ge 8 ]; then
|
||||
done
|
||||
fi
|
||||
|
||||
cd data && ln -sfv lang_bpe_5000 lang_bpe
|
||||
# cd data && ln -sfv lang_bpe_5000 lang_bpe
|
||||
|
||||
@ -106,7 +106,7 @@ class CtcTrainingGraphCompiler(object):
|
||||
word_ids_list = []
|
||||
for text in texts:
|
||||
word_ids = []
|
||||
for word in text.split(" "):
|
||||
for word in text.split():
|
||||
if word in self.word_table:
|
||||
word_ids.append(self.word_table[word])
|
||||
else:
|
||||
|
||||
@ -95,7 +95,7 @@ class Lexicon(object):
|
||||
"""
|
||||
Args:
|
||||
lang_dir:
|
||||
Path to the lang director. It is expected to contain the following
|
||||
Path to the lang directory. It is expected to contain the following
|
||||
files:
|
||||
- tokens.txt
|
||||
- words.txt
|
||||
|
||||
@ -130,6 +130,11 @@ class MmiTrainingGraphCompiler(object):
|
||||
transcript_fsa_with_self_loops,
|
||||
treat_epsilons_specially=False,
|
||||
)
|
||||
|
||||
# CAUTION: Due to the presence of P,
|
||||
# the resulting `num` may not be connected
|
||||
num = k2.connect(num)
|
||||
|
||||
num = k2.arc_sort(num)
|
||||
|
||||
ctc_topo_P_vec = k2.create_fsa_vec([self.ctc_topo_P])
|
||||
@ -160,7 +165,7 @@ class MmiTrainingGraphCompiler(object):
|
||||
word_ids_list = []
|
||||
for text in texts:
|
||||
word_ids = []
|
||||
for word in text.split(" "):
|
||||
for word in text.split():
|
||||
if word in self.lexicon.word_table:
|
||||
word_ids.append(self.lexicon.word_table[word])
|
||||
else:
|
||||
|
||||
174
test/test_mmi_graph_compiler.py
Executable file
174
test/test_mmi_graph_compiler.py
Executable file
@ -0,0 +1,174 @@
|
||||
#!/usr/bin/env python3
|
||||
# Copyright 2021 Xiaomi Corp. (authors: Fangjun Kuang)
|
||||
#
|
||||
# See ../../LICENSE for clarification regarding multiple authors
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
"""
|
||||
You can run this file in one of the two ways:
|
||||
|
||||
(1) cd icefall; pytest test/test_mmi_graph_compiler.py
|
||||
(2) cd icefall; ./test/test_mmi_graph_compiler.py
|
||||
"""
|
||||
|
||||
import os
|
||||
import shutil
|
||||
import sys
|
||||
import copy
|
||||
from pathlib import Path
|
||||
|
||||
import k2
|
||||
|
||||
from icefall.mmi_graph_compiler import MmiTrainingGraphCompiler
|
||||
|
||||
TMP_DIR = "/tmp/icefall-test-mmi-graph-compiler"
|
||||
USING_PYTEST = "pytest" in sys.modules
|
||||
ICEFALL_DIR = Path(__file__).resolve().parent.parent
|
||||
print(ICEFALL_DIR)
|
||||
|
||||
|
||||
def generate_test_data():
|
||||
# if Path(TMP_DIR).exists():
|
||||
# return
|
||||
Path(TMP_DIR).mkdir(exist_ok=True)
|
||||
lexicon = """
|
||||
<UNK> SPN
|
||||
cat c a t
|
||||
at a t
|
||||
at a a t
|
||||
ac a c
|
||||
ac a c c
|
||||
"""
|
||||
lexicon_filename = Path(TMP_DIR) / "lexicon.txt"
|
||||
with open(lexicon_filename, "w") as f:
|
||||
for line in lexicon.strip().split("\n"):
|
||||
f.write(f"{line}\n")
|
||||
transcript_words = """
|
||||
cat at ta
|
||||
at at cat ta
|
||||
"""
|
||||
transcript_words_filename = Path(TMP_DIR) / "transcript_words.txt"
|
||||
with open(transcript_words_filename, "w") as f:
|
||||
for line in transcript_words.strip().split("\n"):
|
||||
f.write(f"{line}\n")
|
||||
os.system(
|
||||
f"""
|
||||
cd {ICEFALL_DIR}/egs/librispeech/ASR
|
||||
|
||||
./local/generate_unique_lexicon.py --lang-dir {TMP_DIR}
|
||||
./local/prepare_lang.py --lang-dir {TMP_DIR}
|
||||
|
||||
./local/convert_transcript_words_to_tokens.py \
|
||||
--lexicon {TMP_DIR}/uniq_lexicon.txt \
|
||||
--transcript {TMP_DIR}/transcript_words.txt \
|
||||
--oov "<UNK>" \
|
||||
> {TMP_DIR}/transcript_tokens.txt
|
||||
|
||||
shared/make_kn_lm.py \
|
||||
-ngram-order 2 \
|
||||
-text {TMP_DIR}/transcript_tokens.txt \
|
||||
-lm {TMP_DIR}/P.arpa
|
||||
|
||||
python3 -m kaldilm \
|
||||
--read-symbol-table="{TMP_DIR}/tokens.txt" \
|
||||
--disambig-symbol='#0' \
|
||||
--max-order=2 \
|
||||
{TMP_DIR}/P.arpa > {TMP_DIR}/P.fst.txt
|
||||
"""
|
||||
)
|
||||
|
||||
|
||||
def delete_test_data():
|
||||
shutil.rmtree(TMP_DIR)
|
||||
|
||||
|
||||
def mmi_graph_compiler_test():
|
||||
graph_compiler = MmiTrainingGraphCompiler(lang_dir=TMP_DIR)
|
||||
print(graph_compiler.device)
|
||||
L_inv = graph_compiler.L_inv
|
||||
L = k2.invert(L_inv)
|
||||
|
||||
L.labels_sym = graph_compiler.lexicon.token_table
|
||||
L.aux_labels_sym = graph_compiler.lexicon.word_table
|
||||
L.draw(f"{TMP_DIR}/L.svg", title="L")
|
||||
|
||||
L_inv.labels_sym = graph_compiler.lexicon.word_table
|
||||
L_inv.aux_labels_sym = graph_compiler.lexicon.token_table
|
||||
L_inv.draw(f"{TMP_DIR}/L_inv.svg", title="L")
|
||||
|
||||
ctc_topo_P = graph_compiler.ctc_topo_P
|
||||
ctc_topo_P.labels_sym = copy.deepcopy(graph_compiler.lexicon.token_table)
|
||||
ctc_topo_P.labels_sym._id2sym[0] = "<blk>"
|
||||
ctc_topo_P.labels_sym._sym2id["<blk>"] = 0
|
||||
ctc_topo_P.aux_labels_sym = graph_compiler.lexicon.token_table
|
||||
ctc_topo_P.draw(f"{TMP_DIR}/ctc_topo_P.svg", title="ctc_topo_P")
|
||||
|
||||
print(ctc_topo_P.num_arcs)
|
||||
print(k2.connect(ctc_topo_P).num_arcs)
|
||||
|
||||
with open(str(TMP_DIR) + "/P.fst.txt") as f:
|
||||
# P is not an acceptor because there is
|
||||
# a back-off state, whose incoming arcs
|
||||
# have label #0 and aux_label 0 (i.e., <eps>).
|
||||
P = k2.Fsa.from_openfst(f.read(), acceptor=False)
|
||||
P.labels_sym = graph_compiler.lexicon.token_table
|
||||
P.aux_labels_sym = graph_compiler.lexicon.token_table
|
||||
P.draw(f"{TMP_DIR}/P.svg", title="P")
|
||||
|
||||
ctc_topo = k2.ctc_topo(max(graph_compiler.lexicon.tokens), False)
|
||||
ctc_topo.labels_sym = ctc_topo_P.labels_sym
|
||||
ctc_topo.aux_labels_sym = graph_compiler.lexicon.token_table
|
||||
ctc_topo.draw(f"{TMP_DIR}/ctc_topo.svg", title="ctc_topo")
|
||||
print("p num arcs", P.num_arcs)
|
||||
print("ctc_topo num arcs", ctc_topo.num_arcs)
|
||||
print("ctc_topo_P num arcs", ctc_topo_P.num_arcs)
|
||||
|
||||
texts = ["cat at ac at", "at ac cat zoo", "cat zoo"]
|
||||
transcript_fsa = graph_compiler.build_transcript_fsa(texts)
|
||||
transcript_fsa[0].draw(f"{TMP_DIR}/cat_at_ac_at.svg", title="cat_at_ac_at")
|
||||
transcript_fsa[1].draw(
|
||||
f"{TMP_DIR}/at_ac_cat_zoo.svg", title="at_ac_cat_zoo"
|
||||
)
|
||||
transcript_fsa[2].draw(f"{TMP_DIR}/cat_zoo.svg", title="cat_zoo")
|
||||
|
||||
num_graphs, den_graphs = graph_compiler.compile(texts, replicate_den=True)
|
||||
num_graphs[0].draw(
|
||||
f"{TMP_DIR}/num_cat_at_ac_at.svg", title="num_cat_at_ac_at"
|
||||
)
|
||||
num_graphs[1].draw(
|
||||
f"{TMP_DIR}/num_at_ac_cat_zoo.svg", title="num_at_ac_cat_zoo"
|
||||
)
|
||||
num_graphs[2].draw(f"{TMP_DIR}/num_cat_zoo.svg", title="num_cat_zoo")
|
||||
|
||||
den_graphs[0].draw(
|
||||
f"{TMP_DIR}/den_cat_at_ac_at.svg", title="den_cat_at_ac_at"
|
||||
)
|
||||
den_graphs[2].draw(f"{TMP_DIR}/den_cat_zoo.svg", title="den_cat_zoo")
|
||||
|
||||
|
||||
def test_main():
|
||||
generate_test_data()
|
||||
|
||||
mmi_graph_compiler_test()
|
||||
|
||||
if USING_PYTEST:
|
||||
delete_test_data()
|
||||
|
||||
|
||||
def main():
|
||||
test_main()
|
||||
|
||||
|
||||
if __name__ == "__main__" and not USING_PYTEST:
|
||||
main()
|
||||
Loading…
x
Reference in New Issue
Block a user