Voice/music detector for audio frequency coding with low bit ratio
Title：
Voice/music detector for audio frequency coding with low bit ratio
Application Number：
 200610113117
Application Date：
 2006/09/15
Announcement Date：
 2007/02/28
Pub. Date：
Publication Number：
 1920947
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G10L 15/00, G10L 15/08, G10L 15/02, G10L 11/00, G10L 19/00, G10L 19/08, G10L 19/12, G10L 19/14
Applicant(s)：
 Tsinghua University
Inventor(s)：
 Zhang Bin, Dou Weibei
Key Words：
 low bit ratio, audio frequency coding, Voice/music detector
Abstract：
 The invention relates to a voice signal recognize technique, wherein the invention is characterized in that: after extracting short character vector and using short decide tree to judge the voice signal and music signal; and using one FIFO to extract the character of long character vector and judge the long decide tree; the short character vector comprises short energy function and short frequency distribution function; the long character vector comprises energy variance, energy over-middle rate, low-energy rate, frequency distribution variable rate and a low-frequency distribution rate; said short frequency distribution parameter treats sub-band decomposition via preset multi-resolution wavelet analysis filter and reducing sample. The average error rate of said invention is 0.8%.
Claim：
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PCT：
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2008-4-17
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2008-3-31
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