| File : README | |
| AISHELL-2 Speech Data | |
| 北京希尔贝壳科技有限公司 | |
| Beijing Shell Shell Technology Co.,Ltd | |
| 03/10/2018 | |
| 1. AISHELL-2 Speech Data | |
| - Sampling Rate : 16kHz | |
| - Sample Format : 16bit | |
| - Environment : Indoor | |
| - Speech Data Type : PCM | |
| - Channel Number : 1 | |
| - Recording Equipment : iOS | |
| - Time : 1000 hours of speech data (around 1 million utterances) | |
| - Speaker : 1991 speakers (845 male and 1146 female) | |
| 2. 数据目录结构 | |
| │ AISHELL2-Data-Specification .docx （Corpus Information） | |
| │ README.txt (readme） | |
| │ ChangeLog （Change Information） | |
| └─ data （Data File） | |
| │├─wav.list （Audio list） | |
| │├─trans.txt （Transcript Content） | |
| │├─spk_info.txt （Speaker Information） | |
| │├─wav （Audio Data File） | |
| │├─D2166 （Speaker ID File） | |
| ││ ││ ID2166W0001.wav （Audio） | |
| 3. Evaluation Data: | |
| Currently we open-sourced AISHELL2-2018A-EVAL | |
| - dev: 2500 utterances from 5 speaker | |
| - test: 5000 utterances from 10 speakers | |
| You can download above evaluation set from: https://www.aishelltech.com/aishell_2018_eval | |
| 4. RECIPE | |
| Based on Kaldi standard system, AISHELL-2 provides a self-contained Mandarin ASR recipe | |
| - a word segmentation module, which is a must-have component for Chinese ASR systems | |
| - an open-sourced Mandarin lexicon(DaCiDian) | |
| - a simplified GMM training recipe | |
| - 80-dim FBank without pitch as NN input feature | |
| - slightly different data augmentation setup(tempo perturbation, max-volume perturbation) | |
| - acoustic channel adaptation recipe(AM fine-tuning) | |
| - a real-time streaming ASR demo via laptop microphone (tested on MacOS) | |
| You can download recipe set from: http://www.aishelltech.com/aishell_2 | |