CAJ | 학술논문

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。
제출료일충기우망락반궤적무선다종단음빈동보실현방법。해방법대련접도동일개무선국역망적다개무선음빈계통진행분조관리，병유이동종단실현공제，통과비교주종설비지간적파방진도시간차래주출조정，직접수개성잡RAM완충구리적음빈수거，실현음악적동보파방。방진실험표명，해방법능통과이동종단동시공제무선국역망내다개음빈계통，병동일시간동보파방동일수음악，차동보오차시간가이공제재50호초범위이내，인이기본무법구별，제고료용호체험。
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.