标量-矢量量化(SVQ)在子带编码中的应用  

The Application of Scalar Vector Quantization(SVQ) to Subband Coding

作　　者：李萍 张师东 冷建华 

出　　处：《信息工程学院学报》1997年第4期20-24,共5页

摘　　要：子带编码（ＳＢＣ）作为中低码率的波形编码方法，已经广泛应用于语音及声频编码。ＳＢＣ可以通过给各子带分配不同的量化及编码比特数，使压缩编码后的重建语音具有较高的质量。ＳＶＱ是一种低复杂度、结构化的标量－矢量量化编码［１］，它的码书结构可由标量量化的变长码得到。本文将ＳＶＱ量化编码方法用于子带编码，设计了语音信号ＳＶＱ子带编码模拟系统，模拟结果表明重建语音具有较高的主、客观质量。Subband coding,as a method of medium/low rate waveform coding,has been widely used in speech and voice coding.High quality reconstructed speech can be obtained by encoding the signal in each band with a different number of bits.Ths scalar vector quantizer(SVQ) is a low complexity structured quantizer,The structure of its codebook is derived from a variable length scalar quantizer.In this paper,SVQ is applied to SBC and a speech signal SVQ subband coding system is simulated.Simulation results show that the quality of the reconstructed speech is quite high in objective and subjective measures.

关 键 词：子带编码 标量-矢量量化 语音波形编码 

分 类 号：TN912.31[电子电信—通信与信息系统]