Optimized windows and interpolation factors, and methods for optimizing windows, interpolation factors and linear prediction analysis in the ITU-T G.729 speech coding standard

摘要

Alternate window optimization procedures and/or LSP interpolation factor optimization procedures are used to improve the ITU-T G.729 speech coding standard (the “Standard”) by replacing the window used by the Standard with an optimized window and/or replacing the LSP interpolation factor used by the standard with an optimized LSP interpolation factor. Optimized windows created using the alternate window optimization procedure and/or optimized LSP interpolation factors created using the LSP interpolation factor optimization procedure yield improvements in the objective quality of synthesized speech produced by the Standard. In many cases, improvements are obtained using shorter windows, which results in reduced computational cost and/or smaller future buffering requirements, which results in lowered coding delay. The improved Standard, procedures, and optimized windows and LSP interpolation factors can all be implemented as computer readable software code and in optimization devices.