Discrete-time signal processing (2nd ed.)
Discrete-time signal processing (2nd ed.)
Converting DCT coefficients to H.264/AVC transform coefficients
PCM'04 Proceedings of the 5th Pacific Rim Conference on Advances in Multimedia Information Processing - Volume Part II
Key techniques of bit rate reduction for h.264 streams
PCM'04 Proceedings of the 5th Pacific Rim Conference on Advances in Multimedia Information Processing - Volume Part II
Adapting multimedia Internet content for universal access
IEEE Transactions on Multimedia
A new rate control scheme using quadratic rate distortion model
IEEE Transactions on Circuits and Systems for Video Technology
Transform domain transcoding from MPEG-2 to H.264 with interpolation drift-error compensation
IEEE Transactions on Circuits and Systems for Video Technology
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There is strong need for research in transcoding technologies to enable smooth displacement from MPEG-2 to H.264/AVC since H.264/AVC has been standardized as international standard. In this paper, a novel rate control algorithm for MPEG-2 to H.264/AVC transcoding, which adopting a new block activity measurement, is proposed. Specifically, the standard deviation of the residual error is introduced into the quadratic rate distortion (R-D) model adopted in JVT-G012 instead of the mean of absolute difference (MAD) to measure macroblock (MB) complexity. Meanwhile, based on the fact that the mean square of AC coefficients in an 8×8 DCT block is equal to the variance of an 8×8 block before DCT, we derive a close-form formulation to calculate the variance of a residual MB using the DCT coefficients rather the pixel values. Obviously, this rate control method can be used for MPEG-2 to H.264/AVC transcoder in both pixel domain and transform domain. Experiments show that our proposed algorithm can meet the target bit-rate accurately and achieves a better performance than the JVT-G012.