A RealTime Synchronous Audio Mixing and Transmitting Scheme in Multimedia Conference System
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A RealTime Synchronous Audio Mixing and Transmitting Scheme in Multimedia Conference System
Acta Scientiarum Naturalium Universitatis SunYatseniVol. 49, Issue 2, Pages: 31-36(2010)
作者机构:
1. 广东药学院医药信息工程学院,广东,广州,510006
2.
3. 中山大学信息科学与技术学院,广东,广州,510275
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Published:2010,
Published Online:25 March 2010,
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A RealTime Synchronous Audio Mixing and Transmitting Scheme in Multimedia Conference System. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(2):31-36(2010)
DOI:
A RealTime Synchronous Audio Mixing and Transmitting Scheme in Multimedia Conference System. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 49(2):31-36(2010)DOI:
A RealTime Synchronous Audio Mixing and Transmitting Scheme in Multimedia Conference System
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 realtime synchronous audio mixing and transmitting scheme is presented. This scheme is achieved by setting multiCMBs 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.