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https://github.com/k2-fsa/icefall.git
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5fe58de43c
* initial commit * support download, data prep, and fbank * on-the-fly feature extraction by default * support BPE based lang * support HLG for BPE * small fix * small fix * chunked feature extraction by default * Compute features for GigaSpeech by splitting the manifest. * Fixes after review. * Split manifests into 2000 pieces. * set audio duration mismatch tolerance to 0.01 * small fix * add conformer training recipe * Add conformer.py without pre-commit checking * lazy loading and use SingleCutSampler * DynamicBucketingSampler * use KaldifeatFbank to compute fbank for musan * use pretrained language model and lexicon * use 3gram to decode, 4gram to rescore * Add decode.py * Update .flake8 * Delete compute_fbank_gigaspeech.py * Use BucketingSampler for valid and test dataloader * Update params in train.py * Use bpe_500 * update params in decode.py * Decrease num_paths while CUDA OOM * Added README * Update RESULTS * black * Decrease num_paths while CUDA OOM * Decode with post-processing * Update results * Remove lazy_load option * Use default `storage_type` * Keep the original tolerance * Use split-lazy * black * Update pretrained model Co-authored-by: Fangjun Kuang <csukuangfj@gmail.com>
114 lines
3.6 KiB
Python
Executable File
114 lines
3.6 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright 2021 Johns Hopkins University (Piotr Żelasko)
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# Copyright 2021 Xiaomi Corp. (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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import logging
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import re
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from pathlib import Path
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from lhotse import CutSet, SupervisionSegment
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from lhotse.recipes.utils import read_manifests_if_cached
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# Similar text filtering and normalization procedure as in:
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# https://github.com/SpeechColab/GigaSpeech/blob/main/toolkits/kaldi/gigaspeech_data_prep.sh
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def normalize_text(
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utt: str,
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punct_pattern=re.compile(r"<(COMMA|PERIOD|QUESTIONMARK|EXCLAMATIONPOINT)>"),
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whitespace_pattern=re.compile(r"\s\s+"),
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) -> str:
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return whitespace_pattern.sub(" ", punct_pattern.sub("", utt))
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def has_no_oov(
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sup: SupervisionSegment,
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oov_pattern=re.compile(r"<(SIL|MUSIC|NOISE|OTHER)>"),
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) -> bool:
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return oov_pattern.search(sup.text) is None
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def preprocess_giga_speech():
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src_dir = Path("data/manifests")
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output_dir = Path("data/fbank")
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output_dir.mkdir(exist_ok=True)
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dataset_parts = (
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"DEV",
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"TEST",
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"XL",
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)
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logging.info("Loading manifest (may take 4 minutes)")
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manifests = read_manifests_if_cached(
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dataset_parts=dataset_parts,
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output_dir=src_dir,
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prefix="gigaspeech",
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suffix="jsonl.gz",
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)
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assert manifests is not None
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for partition, m in manifests.items():
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logging.info(f"Processing {partition}")
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raw_cuts_path = output_dir / f"cuts_{partition}_raw.jsonl.gz"
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if raw_cuts_path.is_file():
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logging.info(f"{partition} already exists - skipping")
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continue
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# Note this step makes the recipe different than LibriSpeech:
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# We must filter out some utterances and remove punctuation
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# to be consistent with Kaldi.
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logging.info("Filtering OOV utterances from supervisions")
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m["supervisions"] = m["supervisions"].filter(has_no_oov)
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logging.info(f"Normalizing text in {partition}")
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for sup in m["supervisions"]:
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sup.text = normalize_text(sup.text)
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# Create long-recording cut manifests.
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logging.info(f"Processing {partition}")
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cut_set = CutSet.from_manifests(
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recordings=m["recordings"],
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supervisions=m["supervisions"],
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)
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# Run data augmentation that needs to be done in the
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# time domain.
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if partition not in ["DEV", "TEST"]:
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logging.info(
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f"Speed perturb for {partition} with factors 0.9 and 1.1 "
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"(Perturbing may take 8 minutes and saving may take 20 minutes)"
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)
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cut_set = (
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cut_set
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+ cut_set.perturb_speed(0.9)
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+ cut_set.perturb_speed(1.1)
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)
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logging.info(f"Saving to {raw_cuts_path}")
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cut_set.to_file(raw_cuts_path)
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def 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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preprocess_giga_speech()
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if __name__ == "__main__":
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main()
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