Title :
Soft-decision decoding of binary block codes in CELP speech coding
Author :
Mikkonen, Tomi ; Koppinen, Konsta
Author_Institution :
Tampere University of Technology, Signal Processing Laboratory, P.O. Box 553 FIN-33101 Tampere, Finland
Abstract :
It is shown that the residual codebook in CELP speech coders can be replaced with a spherical code derived from an error-correcting code with low encoding complexity. Fast soft-decision decoding algorithm for binary block codes is modified to search the closest code vector in the spherical code. The quantization is done adaptively in the spectral domain in order to concentrate the quantization power on the most important components according to the LPC-parameters.
Keywords :
Bit rate; Block codes; Decoding; Quantization (signal); Speech; Speech coding; Vectors;
Conference_Titel :
Signal Processing Conference, 2000 10th European
Conference_Location :
Tampere, Finland
Print_ISBN :
978-952-1504-43-3
