| ATM网络中恒定比特率和可变比特率语音通信 |
| |
| 引用本文： | 杨震,毕厚杰.ATM网络中恒定比特率和可变比特率语音通信[J].南京邮电大学学报(自然科学版),1998(Z1). |
| |
| 作者姓名： | 杨震 毕厚杰 |
| |
| 作者单位： | 上海交通大学电子工程系(杨震)，南京邮电学院信息工程系(毕厚杰) |
| |
| 摘 要： | 分析了ＡＴＭ（异步转移模式）网络中恒定比特率（ＣＢＲ）和可变比特率（ＶＢＲ）语音通信方式，讨论了ＩＴＵＴ１９９７年新颁布的ＡＴＭ可变比特率业务适配标准ＡＡＬ２，给出了信元装配实例。针对ＶＢＲ业务相对ＣＢＲ业务有较大不同的网络传输时延特性，着重分析了语音信号作为ＶＢＲ业务采用ＡＡＬ２适配标准时，通过ＡＴＭ网络传输时的装配时延问题。
|
| 关 键 词： | 异步转移模式，语音编码，适配，时延 |
CBR and VBR Speech Communications in ATM Networks |
| |
| Yang Zhen,Bi Houjie.CBR and VBR Speech Communications in ATM Networks[J].Journal of Nanjing University of Posts and Telecommunications,1998(Z1). |
| |
| Authors: | Yang Zhen Bi Houjie |
| |
| Institution: | Yang Zhen 1 Bi Houjie 2 1 Department of Electronic Engineering,Shanghai Jiaotong University,200030,Shanghai,PRC 2 Department of Information Engineering,Nanjing Institute of Posts and Telecommunications,210003,Nanjing,PRC |
| |
| Abstract: | The CBR(constant bit rate) and VBR(variable bit rate) speech communications in ATM(asynchronous transfer mode) networks are discussed in this paper.Our focus is on the new draft ITU T I.363.2 that specifies the ATM variable bit rate adaptive layer AAL2.Several instances that use this new draft to adapt different input bit rates are also given.Comparisons are made between VBR and CBR in voice services. |
| |
| Keywords: | Asynchronous transfer mode Speech coding Adaptation Time delay |
| 本文献已被 CNKI 等数据库收录！ |
