A Novel Multiple-Channel Video Mixing Scheme for Multiple-Point Processing Unit

Author

Wang, Zhongyuan ; Hu, Ruimin ; Chang, Jun ; Zhong, Rui ; Han, Zhen

Author_Institution

Nat. Multimedia Software Eng. Res. Center, Wuhan Univ., Wuhan, China

fYear

2010

fDate

29-31 Oct. 2010

Firstpage

1

Lastpage

4

Abstract

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.

Keywords

computational complexity; discrete cosine transforms; distortion; teleconferencing; video coding; video communication; video streaming; DCT-domain; H.323 video conference system; computational complexity; image distortion; multiple channel video stream mixing; multiple-channel video mixing scheme; multiple-point control unit; multiple-point processing unit; semantics mapping; video syntax; video transcoding; Bit rate; Correlation; Quantization; Streaming media; Syntactics; Transcoding;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Technology (ICMT), 2010 International Conference on

Conference_Location

Ningbo

Print_ISBN

978-1-4244-7871-2

Type

conf

DOI

10.1109/ICMULT.2010.5630965

Filename

5630965