发明名称 |
Methods and apparatus for coding digital audio signals using a filtered quantizing noise |
摘要 |
The invention concerns an encoder for an input audio signal (S(z)) comprising a combination module combining the input audio signal with an intermediate counter-reaction signal forming a modified input signal and a quantification module scalable for the rate (91) of said modified input signal, delivering a binary raster of quantification indexes of a predetermined rate. This encoder is such that it comprises: a reverse quantification module (93) of a part of the quantification indexes of the binary raster corresponding to the indexes of a rate lower than the predetermined rate, for predetermining a reconstructed signal (SMic(z)), a module for determining (94) a quantification noise (QMic(z)) derived from at least quantification modules and reverse quantification modules in series, a determination module (111) for a filtering function of the quantification noise from said reconstructed signal and a filtering module fit for applying (33) said filtering function to said quantification noise in order to obtain said intermediary counter-reaction signal. The invention also relates to an encoding method applied by the described encoder and a corresponding decoding method applied by a decoder. |
申请公布号 |
US8719012(B2) |
申请公布日期 |
2014.05.06 |
申请号 |
US20080602809 |
申请日期 |
2008.06.13 |
申请人 |
KOVESI BALAZS;LE GUYADER ALAIN;RAGOT STÉPHANE;ORANGE |
发明人 |
KOVESI BALAZS;LE GUYADER ALAIN;RAGOT STÉPHANE |
分类号 |
G10L21/00;G10L19/02;G10L19/032;G10L19/24;G10L19/26 |
主分类号 |
G10L21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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