A signal processing arrangement uses a codebook of first vector quantized speech feature signals formed responsive to a large collection of speech feature signals. The codebook is altered by combining the first speech feature signals of the codebook with second speech feature signals generated responsive...http://www.google.com.hk/patents/US5377301?utm_source=gb-gplus-share專利 US5377301 - Technique for modifying reference vector quantized speech feature signals
