Add KsponSpeech recipe

[whsqkaak]

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 wav 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:

Dataset: https://aihub.or.kr/aihubdata/data/view.do?currMenu=115&topMenu=100&aihubDataSe=realm&dataSetSn=123
Paper: https://www.mdpi.com/2076-3417/10/19/6936

[pzelasko]

Thanks, great work! I left 2 comments.

[pzelasko]

can we make normalization optional (and enabled by default) via a parameter in prepare_ksponspeech? you can see other recipes, some of them have a string option making it possible to choose different flavors of normalization (we can have "default" and "none" here)

[whsqkaak]

can we make normalization optional (and enabled by default) via a parameter in prepare_ksponspeech? you can see other recipes, some of them have a string option making it possible to choose different flavors of normalization (we can have "default" and "none" here)

Fix it in e7dc868

[pzelasko]

could we convert to FLAC instead? 2x storage space savings

[whsqkaak]

could we convert to FLAC instead? 2x storage space savings

Fix it in 36aa16d

[whsqkaak]

Thanks, great work! I left 2 comments.

Thanks for your feedback! I'll fix the proposal quickly.

[pzelasko]

Thanks! LGTM