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28 April 2004 Video transcoding for wireless mobile Internet access
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Proceedings Volume 5284, Wireless Communications and Networks; (2004)
Event: Asia-Pacific Optical and Wireless Communications, 2003, Wuhan, China
A method of improved motion vector based on quantization errors in transcoding for wireless mobile Internet is proposed in this paper. The computational complexity of this scheme can be reduced. The control strategy of transcoder buffer is also discussed, and the number of coding bits on the picture layer in the whole is allocated, then different types of picture respectively are processed on the basis of frondose picture characteristics when each frame is coded. Finally optimal quantization parameter for every macroblock in a frame is select. The simulation results shows that this method can effectively speed up the transcoding without significant lose in quality. The output bit rate of the transcoder and the buffer fullness tend to be stabilized, and the peak signal-to-noise-ratio (PSNR) of the reconstructed picture is raised.
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Xiaohui Li "Video transcoding for wireless mobile Internet access", Proc. SPIE 5284, Wireless Communications and Networks, (28 April 2004);


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