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--- |
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license: cc-by-nc-4.0 |
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language: |
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- yue |
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pretty_name: SBS Cantonese Speech Corpus |
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size_categories: |
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- 100K<n<1M |
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--- |
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# SBS Cantonese Speech Corpus |
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This speech corpus contains **435 hours** of [SBS Cantonese](https://www.sbs.com.au/language/chinese/zh-hant/podcast/sbs-cantonese) podcasts from Auguest 2022 to October 2023. |
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There are **2,519 episodes** and each episode is split into segments that are at most 10 seconds long. In total, there are **189,216 segments** in this corpus. |
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Here is a breakdown on the categories of episodes present in this dataset: |
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<style> |
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table th:first-of-type { |
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width: 5%; |
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} |
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table th:nth-of-type(2) { |
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width: 15%; |
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} |
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table th:nth-of-type(3) { |
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width: 50%; |
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} |
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</style> |
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| Category | SBS Channels | Episodes | |
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|-------------------|----------------------|-------| |
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| news | 中文新聞, 新聞簡報 | 622 | |
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| business | 寰宇金融 | 148 | |
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| vaccine | 疫苗快報 | 71 | |
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| gardening | 園藝趣談 | 58 | |
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| tech | 科技世界 | 56 | |
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| health | 健康快樂人 | 53 | |
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| culture | 文化360 | 49 | |
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| english | 學英語 | 41 | |
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| expert | 專家話你知 | 37 | |
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| interview | 我不是名人 | 20 | |
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| career | 澳洲招職 | 18 | |
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| food | 美食速遞 | 18 | |
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| uncategorized | n/a | 1328 | |
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* Uncategorized episodes are mostly news but also contains other categories listed above. |
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## Dataset Details |
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### Dataset Description |
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<!-- Provide a longer summary of what this dataset is. --> |
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- **Curated by:** Kevin Li |
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- **Language(s):** Cantonese, English (only in podcasts categorized as "english") |
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- **License:** Creative Commons Attribution Non-Commercial 4.0 |
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### Scraper |
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<!-- Provide the basic links for the dataset. --> |
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- **Repository:** https://github.com/AlienKevin/sbs_cantonese |
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## Uses |
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Each episode is split into segments using [silero-vad](https://github.com/snakers4/silero-vad). |
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Since silero-vad is not trained on Cantonese data, the segmentation is not ideal and often break sentences in the middle. |
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Hence, this dataset is not intended to be used for supervised ASR. Instead, it is intended to be used for self-supervised |
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speech pretraining, like training WavLM, HuBERT, and Wav2Vec. |
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### Format |
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Each segment is stored as a monochannel FLAC file with a sample rate of 16k Hz. You can find the segments under the `audio/` folder, |
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where groups of segments are bundled into a .tar.gz file for ease of distribution. |
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The filename of the segment shows which episodes it belongs to and place of it within that episode: |
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For example, here's a filename: |
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``` |
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0061gy0w8_0000_5664_81376 |
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``` |
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where |
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* `0061gy0w8` is the episode id |
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* `0000` means that it is the first segment of that episode |
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* `5664` is the starting sample of this segment. Remember all episodes are sampled at 16k Hz, so the total number of samples |
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in an episode is (the duration in seconds * 16,000). |
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* `81376` is the ending (exclusive) sample of this segment. |
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### Metadata |
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Metadata for each episode is stored in the `metadata.jsonl` file, where each line stores the metadata for one episode: |
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Here's the metadata for one of the episodes (split into multiple lines for clarity): |
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```json |
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{ |
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"title": "SBS 中文新聞 （7月5日）", |
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"date": "05/07/2023", |
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"view_more_link": "https://www.sbs.com.au/language/chinese/zh-hant/podcast-episode/chinese-news-5-7-2023/tl6s68rdk", |
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"download_link": "https://sbs-podcast.streamguys1.com/sbs-cantonese/20230705105920-cantonese-0288b7c2-cb6d-4e0e-aec2-2680dd8738e0.mp3?awCollectionId=sbs-cantonese&awGenre=News&awEpisodeId=20230705105920-cantonese-0288b7c2-cb6d-4e0e-aec2-2680dd8738e0" |
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} |
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``` |
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where |
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* `title` is the title of the episode |
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* `date` is the date when the episode is published |
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* `view_more_link` is a link to the associated article/description for this episode. |
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Many news episodes have extremely detailed manuscripts written in Traditional Chinese while others have briefer summaries or key points available. |
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* `download_link` is the link to download the audio for this episode. It is usually hosted on [streamguys](https://www.streamguys.com/) but some earlier episodes |
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are stored SBS's own server at https://images.sbs.com.au. |
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The id of each episode appears at the end of its `view_more_link`. It appears to be a precomputed hash that is unique to each episode. |
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```python |
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id = view_more_link.split("/")[-1] |
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``` |
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