一种基于CVSD编码特征的失步检测方法  

A Method for Detecting Asynchronous State of Communication Based on CVSD Coding Feature

作　　者：廖蓉晖[1] 许志强 张鹤鸣 LIAO Ronghui;XU Zhiqiang;ZHANG Heming(No.30 Institute of CETC,Chengdu Sichuan 610041,China)

机构地区：[1]中国电子科技集团公司第三十研究所,四川成都610041

出　　处：《通信技术》2023年第12期1359-1363,共5页Communications Technology

摘　　要：首先,介绍了连续可变斜率增量调制(Continuously Variable Slope Delta,CVSD)的语音编码工作原理,从编码特征的角度对CVSD算法进行了研究;其次,通过对自然界各类声音信号的仿真分析提出CVSD算法的特征码型;最后,通过对编码数据的分析对比可知,所提方法可在无须插入同步码组、不占用冗余信道资源的情况下实现通信同失步状态检测,并具备较好的抗信道误码能力。该方法的思路新颖、算法简单,无论采用软件、硬件均可实现,具有较好的推广应用价值。This paper first introduces the speech codec work principle of CVSD(Continuously Variable Slope Delta),and investigates the CVSD algorithm from the perspective of coding features.Then,through the simulation of various sound signals in nature,it analyzes and proposes the characteristic code pattern of CVSD algorithm.Finally,by analyzing and comparing the coded data,it can be seen that the proposed method can achieve communication asynchronous state detection without inserting synchronous code blocks and occupying redundant channel resources,and it has better anti-channel error ability.The idea of this method is relatively novel and simple,no matter using software and hardware can be implemented,and it has fairly good promotion and application value.

关 键 词：连续可变斜率增量调制 脉冲编码调制 语音编码 无线语音系统 编码特征 

分 类 号：TN924.2[电子电信—通信与信息系统]