Vietnamese speech database
About this dataset
1. Product Overview
A Vietnamese speech database totaling 521 hours. Sampling rate: 16,000 Hz; bit depth: 16 bits. The speakers are native Vietnamese speakers aged between 14 and 51. Transcriptions were performed by professional proofreaders and subjected to rigorous quality checks, achieving a text accuracy rate of over 95%.
2. Speech Data Transcription
Transcribers transcribe the audio content based on what they hear, striving to ensure complete consistency between the written text and the spoken audio. General guidelines include: 1) Transcriptions must exactly match the spoken content—no extra words, missing words, or errors. 2) Numbers should be transcribed in English Latin form—for example, “Một hai ba” becomes “one two three,” not “123.” 3) English words should be lowercase unless capitalized for proper nouns or acronyms, e.g., “W W W dot Google dot com,” “C E O.” 4) All annotations must fully reflect the actual pronunciation without omissions.
3. Directory Structure and Naming Conventions
Directory Structure
The data directory tree is organized as follows:
└─DOC (textual documentation)
││├─content.txt (list of transcribed contents)
││├─spk-info.txt (speaker information table)
└─SPEECHDATA (audio folder)
││├─V0001.wav (speaker ID file)
││ │├─V0001W0001.wav (audio file)
Naming Conventions
CORPUS/USAGE/SPEAKER_ID/SPEECH_IDe.g./SPEECHDATA/V0001/V0001W0001.wav
Directory Name · Content · Notes
CORPUS · · Speech database identifier
USAGE · SPEECHDATA · Audio folder
SPEAKER_ID · V0001 · Folder corresponding to speaker ID
SPEECH_ID · V0001W0001.wav · Individual audio file
4. Speaker Information
Gender Information
The database contains a total of 583 speakers, including 170 males and 413 females, as shown in the following table:
Gender · Male · Female · Proportion
Number · 170 · 29.2% · 70.8%
Age Information
The speakers’ ages range from 14 to 51, with the following distribution:
Age Group · Number · Proportion (%)
14–17 years old · 59 · 10.12%
18–25 years old · 497 · 85.25%
26 years and older · 27 · 4.63%
Total · 583 · 100%
Data Sample Download
Samples
- Audio sample 1