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Yong Wang, Jae-Gon Kim, Shih-Fu Chang. MPEG-4 Real Time FD-CD Transcoding. Columbia University ADVENT Technical Report #208-2005-2 Columbia University, 2003.

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In this report we summarize our work on real time transcoding implementation combining frame dropping (FD) and DCT coefficient dropping (CD). FD can realize the temporal down sampling resulting in a low frame rate video stream, while CD is implemented by truncating the high frequency AC DCT coefficient bits. The video quality is optimized by adopting the Lagrange optimization. We also propose efficient methods to address the issues of rate allocation for FD-CD combined transcoding. One advantage of this FD-CD transcoding is its light weighted computational complexity. Our experiment results demonstrate that FD-CD transcoding can achieve satisfied output quality and promising computational efficiency


Yan Wang
Yong Wang
Jae-Gon Kim
Shih-Fu Chang

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   Author = {Wang, Yong and Kim, Jae-Gon and Chang, Shih-Fu},
   Title = {MPEG-4 Real Time FD-CD Transcoding},
   Institution = {Columbia University},
   Year = {2003}

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