A Novel Multiple-Channel Video Mixing Scheme for Multiple-Point Processing Unit
Multimedia Technology（2010）
摘要
Mixing multiple channel video streams is an essential function for the multiple-point processing unit of video conference system. The traditional mixing methods have the disadvantage of high computational complexity and severe image distortion. This paper proposed a mixing method based on the video syntax and semantics mapping in DCT-domain. The experimental results reveal that the PSNR has shown almost 2dB improvement compared with pixel-domain method. This method has been integrated into the multiple-point control unit (MCU) of the H.323 video conference system.
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关键词
video conference,dct domain,video syntax,distortion,multiple-point processing unit,multiple-point control unit,image distortion,discrete cosine transforms,computational complexity,video coding,video mixing,teleconferencing,video transcoding,dct-domain,multiple-channel video mixing scheme,video streaming,multiple channel video stream mixing,video communication,semantics mapping,h.323 video conference system,correlation,point process,quantization,transcoding
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