发明名称 |
SYSTEM AND METHOD FOR ENHANCING A DECODED TONAL SOUND SIGNAL |
摘要 |
<p>A system and method for enhancing a tonal sound signal decoded by a decoder of a speech-specific codec in response to a received coded bit stream, in which a spectral analyser is responsive to the decoded tonal sound signal to produce spectral parameters representative of the decoded tonal sound signal. A quantization noise in low-energy spectral regions of the decoded tonal sound signal is reduced in response to the spectral parameters produced by the spectral analyser. The spectral analyser divides a spectrum resulting from spectral analysis into a set of critical frequency bands each comprising a number of frequency bins, and the reducer of quantization noise comprises a noise attenuator that scales the spectrum of the decoded tonal sound signal per critical frequency band, per frequency bin, or per both critical frequency band and frequency bin.</p> |
申请公布号 |
EP2252996(A1) |
申请公布日期 |
2010.11.24 |
申请号 |
EP20090717868 |
申请日期 |
2009.03.05 |
申请人 |
VOICEAGE CORPORATION |
发明人 |
VAILLANCOURT, TOMMY;JELINEK, MILAN;MALENOVSKY, VLADIMIR;SALAMI, REDWAN |
分类号 |
G10L21/02;G10L19/12;G10L19/14 |
主分类号 |
G10L21/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|