Metod och anordning för att implementera vektorkvantisering av talparametrar

摘要

A vocoder (10) includes a digital signal processor (18) and a vector quantizer (28) implemented in hardware external to the digital signal processor (18). The vector quantizer (28) includes an analysis codebook (32) having a multitude of scalar quantized code vectors (60). A frame of digitized speech is translated into speech parameters, which are then scalar quantized to form a source vector. This scalar quantized source vector is then vector quantized in the vector quantizer (28) prior to transmission into a communication channel (22). A separate synthesis codebook (30) is used in decompressing vocoded speech received from the communication channel (22).