Post-processing of MPEG2 coded video for transmission at lower bit rates
ICASSP '96 Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 04
Manipulation and compositing of MC-DCT compressed video
IEEE Journal on Selected Areas in Communications
Architectures for MPEG compressed bitstream scaling
IEEE Transactions on Circuits and Systems for Video Technology
A new rate control scheme using quadratic rate distortion model
IEEE Transactions on Circuits and Systems for Video Technology
Rate Control Algorithm for MPEG-2 to H.264/AVC Transcoding
IbPRIA '07 Proceedings of the 3rd Iberian conference on Pattern Recognition and Image Analysis, Part II
Model-based transrating of H.264 coded video
IEEE Transactions on Circuits and Systems for Video Technology
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In previous techniques of bit rate reduction transcoding, reusing the mode of the input MB is widely adopted. However, directly re-using the mode of input MB will cause additional losses for H.264 bit-rate scaling. Variable-size block-matching based motion estimation makes H.264 much more efficient than other coding standards while increasing its complexity. As the target bit rate changes, the best mode of the MB may also change. In this paper we concerned two key techniques for H.264 bit rate reduction transcoding: Mode decision and rate control. A fast MB mode decision algorithm and an improved rate control algorithm depending on statistics of input streams is proposed.