摘要
针对移动通信网络中AMR-WB编解码器在话音分组传输中的抗丢包问题,提出了一种与VoLTE系统中语音编码速率相匹配的AMR-WB抗丢包实现方案.通过实验分析AMR-WB编解码器中经过错误隐藏恢复的各个参数对语音质量的影响,利用多描述编码(multiple description coding,MDC)技术设计了AMR-WB抗丢包方案,并进一步结合删余卷积编码提出了双重差错保护的增强型抗丢包算法,实现了多码率下的差错保护和速率匹配,该方案可兼容原有AMR-WB编码模式下的语音编码速率.仿真结果表明,提出的新方案能够增强AMR-WB的抗丢包能力,并且不需要增加额外的信令开销,兼容现有系统网络中的多速率语音编码.
In mobile communication network, there exists anti packet loss problem in adaptive multi rate-wide band（AMR-WB） codec when transmitting voice packet. In order to settle the problem, AMR-WB anti packet loss implementation approach matching the rate of speech coding in VoLTE system was proposed. Firstly, the impacts of each parameter in the AMR-WB codec on voice quality after the recovery of error concealment was analyzed through experiment. Then an AMR-WB anti packet loss scheme was designed by taking advantage of MDC （multiple description coding） technology. Furthermore, combing with punctured-convolution coding, an enhanced anti packet algorithm with double error protection was proposed to implement error protection and rate matching under multi-rate situation. The scheme is compatible with the rate of voice coding under the original AMR-WB coding model. Simulation results show that the proposed novel scheme can strengthen anti packet loss capability of AMR-WB without the need of increasing signaling overhead in mobile network, and it is compatible with the multi-rate voice coding in existing mobile network.
作者
王晶
刘宝光
费泽松
张剑寅
WANG Jing LIU Bao-guang FEI Ze-song ZHANG Jian-yin(School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China Research Institute of China Mobile Communication Corporation, Beijing 100053, China)
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2016年第10期1048-1052,共5页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(61571044
11461141004)
国家教育部-中国移动科研基金资助项目(MCM201240113)
关键词
AMR-WB
MDC
删余卷积编码
移动网络
adaptive multi rate-wide band
multiple description coding algorithm
punctured- convolution coding
mobile network
