FIELD: speech encoding.
SUBSTANCE: method and device for quantizing amplification for realization in the method for encoding digitized sound signal, processed during encoding in serial frames from L selections, where each frame is divided onto a certain number of sub-frames and each sub-frame contains a certain number of N selections, where N<L. In the method and device for quantizing amplification the original amplification of main tone is computed on basis of a certain number f of sub-frames, a part of code book of amplification quantization is selected relatively to original amplification of main tone, and amplifications of main tone and fixed code book are quantized together. Aforementioned combined quantization of main tone and fixed code book amplifications contains for a certain number f of sub-frames the search in amplification quantization code book in connection to a search criterion. Search in code book is limited to selected part of amplification quantization code book and to index of selected part of amplification quantization code book, which best corresponds to found search criterion.
EFFECT: increased traffic capacity of system.
8 cl, 3 tbl, 4 dwg
