Resource: AISHELL-1

Reference AISHELL-1
Date of Submission Nov. 21, 2018, 7:08 p.m.
Status accepted
ISLRN 733-251-884-636-1
Resource Type Primary Text
Media Type Text, Audio
Language Mandarin Chinese
Format/MIME Type audio/x-flac, text/plain
Size 47897192 KB
Access Medium Hard Drive


AISHELL-1 was developed by Beijing Shell Shell Technology Co., Ltd. It contains approximately 520 hours of Chinese Mandarin speech from 400 speakers recorded simultaneously on three different devices with associated transcripts.

The goal of the collection was to support speech recognition system development in 11 domains, including smart homes, autonomous driving, entertainment, finance and science and technology. Participants read 500 sentences covering the domains; sentences were chosen for their speech and phonetic characteristics.

Speakers were recruited from different accent areas across China, including North, South and Yue-Gui-Min regions. There were 214 female speakers and 186 male speakers, constituting 53% and 47% of the database, respectively. Additional demographic information about the participants is included in this release.


Speech was recorded in a quiet indoor environment on a high fidelity microphone and two mobile phones (Android and iOS). All speech is presented as 16-bit flac compressed wav files; the microphone speech sample rate is 44.1kHz and the phone speech sample rate is 16kHz. Each speech file ranges from approximately 1 second to 14 seconds in length.

Transcripts are stored as UTF-8 encoded plain text files and are not time-aligned.

Version 1.0
Creator Hui Bu
Distributor Linguistic Data Consortium
Rights Holder Portions © 2018 Beijing Shell Shell Technology Co., Ltd., © 2018 Trustees of the University of Pennsylvania