发明名称 |
IMPROVED TRANSFORM CODING OF SPEECH AND AUDIO SIGNALS |
摘要 |
In a method of perceptual transform coding of audio signals in a telecommunication system, performing the steps of determining transform coefficients representative of a time to frequency transformation of a time segmented input audio signal; determining a spectrum of perceptual sub-bands for said input audio signal based on said determined transform coefficients; determining masking thresholds for each said sub-band based on said determined spectrum; computing scale factors for each said sub-band based on said determined masking thresholds, and finally adapting said computed scale factors for each said sub-band to prevent energy loss for perceptually relevant sub-bands. |
申请公布号 |
WO2009029035(A1) |
申请公布日期 |
2009.03.05 |
申请号 |
WO2008SE50967 |
申请日期 |
2008.08.26 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL);BRIAND, MANUEL;TALEB, ANISSE |
发明人 |
BRIAND, MANUEL;TALEB, ANISSE |
分类号 |
G10L19/02;H04B1/66 |
主分类号 |
G10L19/02 |
代理机构 |
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地址 |
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