发明名称 |
MULTIMODE CODING OF SPEECH-LIKE AND NON-SPEECH-LIKE SIGNALS |
摘要 |
<p>The invention relates to the coding of audio signals that may include both speech-like and non-speech-like signal components. It describes methods and apparatus for code excited linear prediction (CELP) audio encoding and decoding that employ linear predictive coding (LPC) synthesis filters controlled by LPC parameters, a plurality of codebooks each having codevectors, at least one codebook providing an excitation more appropriate for non-speech-like signals and at least one codebook providing an excitation more appropriate for speech-like signals, and a plurality of gain factors, each associated with a codebook. The encoding methods and apparatus select from the codebooks codevectors and/or associated gain factors by minimizing a measure of the difference between the audio signal and a reconstruction of the audio signal derived from the codebook excitations. The decoding methods and apparatus generate a reconstructed output signal from the LPC parameters, codevectors, and gain factors.</p> |
申请公布号 |
EP2269188(B1) |
申请公布日期 |
2014.06.11 |
申请号 |
EP20090720866 |
申请日期 |
2009.03.12 |
申请人 |
DOLBY LABORATORIES LICENSING CORPORATION |
发明人 |
YU, RONGSHAN;RADHAKRISHNAN, REGUNATHAN;ANDERSEN, ROBERT, L.;DAVIDSON, GRANT, A. |
分类号 |
G10L19/08;G10L19/093;G10L19/12;G10L19/18 |
主分类号 |
G10L19/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|