Multi-channel Digital Speech Database

1. Product Overview

A multi-channel digital speech database, totaling 349 hours and 300,966 sentences. Recordings were made in a quiet room using mobile phones or high-fidelity recording equipment. The audio was transcribed and annotated by professional linguists and underwent rigorous quality assurance, achieving a text accuracy rate of over 95%.

2. Speech Data Transcription

Transcribers reproduce the content based on the audio they hear, striving to ensure that the written text accurately reflects the spoken words. General guidelines are as follows: 1) The transcription must match the audio exactly—no extra words, missing words, or errors. 2) Numbers should be transcribed in Chinese characters, such as “一二三,” rather than “123”; distinguish between “一” and “幺.”

3. Directory Structure and Naming Conventions

Directory Structure

Data directory tree structure

└─DOC (textual documentation)
││├─wav_list.txt (audio file list)
││├─content.txt (transcription list)
└─SPEECHDATA (audio folder)
││├─MIC (device information)
││ ││ M0001.wav (audio file)

Naming Conventions

CORPUS/USAGE/<DEVICE_ID>/SPEECH_IDe.g./SPEECHDATA/MIC/M0001.wav

Directory Name · Content · Notes

CORPUS · · Speech database ID

USAGE · SPEECHDATA · Audio folder

DEVICE_ID · MIC · Device ID

SPEECH_ID · M0001.wav · Audio file

Sample Data Download

Click to download sample data (data_sample.zip)