KsponSpeech is a large-scale spontaneous speech corpus of Korean. This corpus contains 969 hours of open-domain dialog utterances, spoken by about 2,000 native Korean speakers in a clean environment.

All data were constructed by recording the dialogue of two people freely conversing on a variety of topics and manually transcribing the utterances.

The transcription provides a dual transcription consisting of orthography and pronunciation, and disfluency tags for spontaneity of speech, such as filler words, repeated words, and word fragments.

The original audio data has a pcm extension. During preprocessing, it is converted into a file in the flac extension and saved anew.

KsponSpeech is publicly available on an open data hub site of the Korea government. The dataset must be downloaded manually.

For more details, please visit:

./RESULTS.md contains the latest results.

Transducers

There are various folders containing the name transducer in this folder. The following table lists the differences among them.

	Encoder	Decoder	Comment
`pruned_transducer_stateless7_streaming`	Streaming Zipformer	Embedding + Conv1d	streaming version of pruned_transducer_stateless7
`zipformer`	Upgraded Zipformer	Embedding + Conv1d	The latest recipe

The decoder in transducer_stateless is modified from the paper Rnn-Transducer with Stateless Prediction Network. We place an additional Conv1d layer right after the input embedding layer.