MPEG-4 Real Time FD-CD Transcoding
نویسندگان
چکیده
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 specify the issues of rate allocation within one GOP. One advantage of this FD-CD transcoding is its light weighted computational complexity. We present some experiment results, which demonstrate that our FD-CD transcoding can achieve satisfied output quality and promising computational efficiency.
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