摘要
本文简要介绍了线谱频率(LSF)参数的定义和性质,给出了一种求解LSF参数的有效办法。在LPC语音编码中设计了一种新的LSF参数分裂矢量量化器。主观和客观评价结果表明,以每帧25bit对LSF参数编码,该量化器提供了透明的量化质量。
In this paper, the definition and properties of Line Spectral Frequency(LSF) parameters are introduced briefly. An efficient solution method of obtaining LSF parameters is presented. A new Split Vector Quantizer(SVQ) of LSF parameters is designed in LPC speech coding. The objective and subjective evaluations show that the proposed scheme offers transparent quantization quality with 25 bit/frame.
基金
中国博士后科学基金
国家自然科学基金(69602001)
ISN国家重点实验室部分支持
关键词
语音编码
线性预测
矢量量化
线谱频率
Speech coding, Linear prediction, Vector quantization, Line Spectral Frequencies
