发明名称 |
Efficient excitation quantization in a noise feeback coding system using correlation techniques |
摘要 |
A method of performing an excitation Vector Quantization (VQ) in a Noise Feedback Coding environment involves reorganizing a calculation of an energy of an error vector for each of a plurality of candidate excitation vectors of a codebook. The energy of the error vector is a cost function that is minimized during a search of the codebook for a best candidate excitation VQ vector. The reorganization includes expanding a Mean Squared Error (MSE) term of the error vector, excluding an energy term that is invariant to the candidate excitation vector, and pre-computing energy terms of ZERO-STATE responses of the candidate excitation vectors that are invariant to sub-vectors of a subframe. Another method searches a signed codebook. Both methods use correlation techniques. <IMAGE> |
申请公布号 |
EP1293968(A3) |
申请公布日期 |
2004.12.01 |
申请号 |
EP20020255681 |
申请日期 |
2002.08.14 |
申请人 |
BROADCOM CORPORATION |
发明人 |
THYSSEN, JES;CHEN, JUIN-HWEY |
分类号 |
G10L19/12 |
主分类号 |
G10L19/12 |
代理机构 |
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