CAJ | 학술논문

在集中式多媒体音频会议中,混音算法决定了其混音输出语音质量的高低,而混音算法的实现要依靠同步混音转发机制的支持.对 Perkins提出的混音循环缓冲区进行分析,提出一种适用于集中式多媒体音频会议系统的实时同步混音转发算法.该算法通过设置多个循环混音缓冲区,并对其实施同步控制来实现音频数据的混音、转发功能,并利用反映操作系统调度情况的声卡缓冲区数据长度确定每次混音处理的数据长度,以减轻操作系统调度对混音的影响.实验验证了此算法的可行性和稳定性.
재집중식다매체음빈회의중,혼음산법결정료기혼음수출어음질량적고저,이혼음산법적실현요의고동보혼음전발궤제적지지.대 Perkins제출적혼음순배완충구진행분석,제출일충괄용우집중식다매체음빈회의계통적실시동보혼음전발산법.해산법통과설치다개순배혼음완충구,병대기실시동보공제래실현음빈수거적혼음、전발공능,병이용반영조작계통조도정황적성잡완충구수거장도학정매차혼음처리적수거장도,이감경조작계통조도대혼음적영향.실험험증료차산법적가행성화은정성.
The audio mixing algorithm determines the quality of the mixing voice in the unicast based centralized multimedia conference system.However,the implementation of the mixing algorithm is based on the backup of synchronous audio mixing and transmitting mechanism.The circular mixing buffer (CMB) proposed by Perkins is analyzed,and then a real-time synchronous audio mixing and transmitting scheme is presented.This scheme is achieved by setting multi-CMBs and controlling them synchronously.The length of data used for mixing is decided by the one of data storing in the soundcard buffer which reflects operating system (OS) scheduling.This can alleviate the influence of OS scheduling on the audio mixing operation.Experiment results manifest that our scheme is feasible and steady.