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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue ( 6): 6-    DOI: 10.1631/jzus.2005.A0507
    
Research on fast real-time adaptive audio mixing in multimedia conference
FAN Xing, GU Wei-kang, YE Xiu-qing
Department of Information and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  In multimedia conference, the capability of audio processing is basic and requires more for real-time criteria. In this article, we categorize and analyze the schemes, and provide several multipoint speech audio mixing schemes using weighted algorithm, which meet the demand of practical needs for real-time multipoint speech mixing, for which the ASW and AEW schemes are especially recommended. Applying the adaptive algorithms, the high-performance schemes we provide do not use the saturation operation widely used in multimedia processing. Therefore, no additional noise will be added to the output. The above adaptive algorithms have relatively low computational complexity and good hearing perceptibility. The schemes are designed for parallel processing, and can be easily implemented with hardware, such as DSPs, and widely applied in multimedia conference systems.

Key words： Information and Electronic Engineering Multimedia conference      MCU      Real-time      Adaptive      Audio mixing      Aligned-to-self      Aligned-to-energy     
Received: 16 April 2004     
CLC:  TP309  
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FAN Xing
GU Wei-kang
YE Xiu-qing
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FAN Xing, GU Wei-kang, YE Xiu-qing. Research on fast real-time adaptive audio mixing in multimedia conference. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 6): 6-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A0507     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I 6/6

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