基于网络反馈的无线多终端音频同步方案  

A Synchronization Scheme for the Wireless Multi-terminal Audio System Based on Network Feedback

作　　者：徐永键[1] 廖健裕 徐威[1] 谭洪舟[1] 

机构地区：[1]中山大学,广东广州510006 [2]东莞中山大学研究院,广东东莞523808

出　　处：《无线互联科技》2014年第7期96-98,共3页Wireless Internet Technology

基　　金：<无线数字音频核心芯片及系统的研发与产业化>项目资助;省部产学研结合项目(项目编号:2012B090600009)专项资金资助

摘　　要：提出了一种基于网络反馈的无线多终端音频同步实现方法。该方法对连接到同一个无线局域网的多个无线音频系统进行分组管理,并由移动终端实现控制,通过比较主从设备之间的播放进度时间差来做出调整,直接修改声卡RAM缓冲区里的音频数据,实现音乐的同步播放。仿真实验表明,该方法能通过移动终端同时控制无线局域网内多个音频系统,并同一时间同步播放同一首音乐,且同步误差时间可以控制在50毫秒范围以内,人耳基本无法区别,提高了用户体验。A novel synchronization scheme was proposed for the wireless multi-terminal audio system based on network feedback. The wireless audio systems connecting to the same WLAN were managed in groups and controlled by mobile terminal. Compared with the master equipment in a song＇s playing progress, the slave equipments made some adjustments by directly modifying the audio data in the RAM＇s buffer of the sound card to synchronize with the master equipment. Experimental results show that the proposed synchronization mechanism can be applied to control multiple audio systems in the same WLAN to synchronously play the same music at the same time, and the time error can be limited within the scope of 50 milliseconds, which nearly can＇t be recognized by human＇s ears. The proposed method is certain to improve users＇ experience.

关 键 词：移动终端 DLNA协议 无线多终端音频系统 网络反馈 同步机制 

分 类 号：TN919.34[电子电信—通信与信息系统]