ATM网络中的小波语音变速率编码  

Wavelet based Variable Rate Speech Coding in ATM Networks

作　　者：杨震[1] 毕厚杰[1] 

机构地区：[1]南京邮电学院信息工程系

出　　处：《南京邮电学院学报》1998年第1期6-10,共5页Journal of Nanjing University of Posts and Telecommunications(Natural Science)

摘　　要：针对未来的通信网络为基于ＡＴＭ的ＢＩＳＤＮ网，讨论语音信号的编码技术。提出根据信源熵构造变速率、恒定质量的编码系统的方案，而利用小波包进行信号的多分辨率分解是合理分配比特的有效途径。B ISDN will be the next generation network for telecommunication in the future, which is based on ATM. Based on this point, this paper presents a speech signal coding idea, which tries to adapt the output bit rate of the encoder to the variation of speech information in order to reduce the fluctuation of quantization SNR and save limited bandwidth resources of the network. Wavelet packet technique is the tool to divide time variable speech signals into different resolution sub signals to adequately allocate bits.

关 键 词：异步转移模式 语声信号处理 小波变换 语声编码 

分 类 号：TN912.3[电子电信—通信与信息系统]