Video Transcoding for Wireless Video

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Presentation transcript:

Video Transcoding for Wireless Video Wireless Device Has Limited Resources Processing power Memory Display capability Change GOP Structure Save memory Reduce decoding complexity Frame Size Down-sampling Large bit rate reduction Fit display screens of most mobile devices MPEG1/2 to MPEG4 720 x 480 360 x 240

Video Transcoding Techniques Previous Solution [Shanableh & Ghanbari, 00] Proposed Solution

Down-scale Decoder Save More Than 50% of Memory Reduce Computational Complexity by 70%

Experimental Results Average PSNR Degradation is 0.34dB at 384 kb/s S. Liu, and A. C. Bovik, “A Fast and Memory Efficient Video Transcoder for Low Bit Rate Wireless Communications ”, ICASSP 2002, accepted.