发明名称 |
LPAS speech coder using vector quantized, multi-codebook, multi-tap pitch predictor and optimized ternary source excitation codebook derivation |
摘要 |
A method and apparatus for reducing the complexity of linear prediction analysis-by-synthesis (LPAS) speech coders. The method and apparatus include product code vector quantization (PCVQ) of multi-tap pitch predictor coefficients, which reduces the search and quantization complexity of an adaptive codebook. Further included is a procedure for generating and selecting code vectors consisting of ternary (1,0,-1) values, for optimizing a fixed codebook. Serial optimization of the adaptive codebook first and then the fixed codebook, produces a low complexity LPAS speech coder of the present invention.
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申请公布号 |
US6014618(A) |
申请公布日期 |
2000.01.11 |
申请号 |
US19980130688 |
申请日期 |
1998.08.06 |
申请人 |
DSP SOFTWARE ENGINEERING, INC. |
发明人 |
PATEL, JAYESH S.;KOLB, DOUGLAS E. |
分类号 |
G10L19/08;(IPC1-7):G10L9/00 |
主分类号 |
G10L19/08 |
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