Predictive switched split vector quantiser of very low bit-rate speech coder
低速语音编码中的预测分类分裂矢量量化技术*

In order to reduce bit-rate and still maintain fine distortion performance, this paper proposed predictive switched split vector quantization method. It added memory according the characteristic of the LSP.And it was a hybrid of switched split vector quantization techniques. Experimental results show that the PSSVQ provides a better trade-off between bit-rate and distortion performance than the others. In addition, the PSSVQ has a lower computational (search) complexity at the expense of an increase in memory requirements.