CELP speech coding with almost no codebook search

C.G. Gerlach
Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing  
In analysis-by-synthesis speech coders the computational complexity of the search for an optimum innovation is dill high although transformations were proposed to decrease the complexiv. This limits practical codebook sizes and vector dimensions (block lengths). In this contribution two new structuredfreqruency domain codebooks are proposed, The first one i s a pulse shaped codebook with a reversed search order for the gain and the shape, the second one is a unity magnitude codebook with
more » ... red phase. The corresponding algorithms which are based on new insights, result in a drastically reduced search in the transformed domain. The computational complexity increases only proportional to the bit rate and not to the codebook size.
doi:10.1109/icassp.1994.389706 dblp:conf/icassp/Gerlach94 fatcat:lxzitiycxjgtledpixnzmt772y