发明名称 |
ENCODING OF AN IMPROVEMENT STAGE IN A HIERARCHICAL ENCODER |
摘要 |
A method and coding device are provided for coding a digital audio input signal in a hierarchical coder, which includes a core coding stage with B bits and at least one current improvement coding stage k, delivering quantization indices which are concatenated to form the indices of a preceding embedded coder. The method includes: obtaining possible quantization values for the current improvement stage k by determining absolute reconstruction levels of just the current stage k on the basis of the indices of the preceding embedded coder; and quantizing the input signal of the hierarchical coder having undergone or not a perceptual weighting processing, on the basis of the possible quantization values so as to form a scalar quantization index for the stage k and a quantized signal corresponding to one of the possible quantization values.
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申请公布号 |
US2013268268(A1) |
申请公布日期 |
2013.10.10 |
申请号 |
US201113995014 |
申请日期 |
2011.12.13 |
申请人 |
KOVESI BALAZS;RAGOT STEPHANE;LE GUYADER ALAIN;FRANCE TELECOM |
发明人 |
KOVESI BALAZS;RAGOT STEPHANE;LE GUYADER ALAIN |
分类号 |
G10L19/00;G10L19/02;G10L19/032;G10L19/24 |
主分类号 |
G10L19/00 |
代理机构 |
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