Translator Disclaimer
16 September 1994 Rate-constrained motion estimation
Author Affiliations +
Proceedings Volume 2308, Visual Communications and Image Processing '94; (1994)
Event: Visual Communications and Image Processing '94, 1994, Chicago, IL, United States
A theoretical frame work for rate-constrained motion estimation is introduced. The best trade- off between displacement vector rate and prediction error rate is shown to be the point were the partial derivatives of the multivariate distortion rate function are equal. Low bit-rate coders are severely rate-constrained, and coarser motion compensation is appropriate for lower bit- rates. A new region-based motion estimator builds a tree of nested regions from back to front, where each region is encoded by a closed B-spline contour. The rate-constraint is a natural termination criterion when building the region tree. Experimental results show that rate- constrained motion compensation is superior to a full-search block matching scheme when incorporated into a motion-compensating hybrid coding scheme, yielding up to 3 dB SNR improvement at 15 kbps.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bernd Girod "Rate-constrained motion estimation", Proc. SPIE 2308, Visual Communications and Image Processing '94, (16 September 1994);


Comparison of ISO MPEG1 and MPEG2 video-coding standards
Proceedings of SPIE (October 22 1993)
Bit plane quantization for scalable video coding
Proceedings of SPIE (January 04 2002)
An operational rate control scheme for H.264 with two stage...
Proceedings of SPIE (September 16 2005)
Performance evaluation of MPEG-2 for HDTV
Proceedings of SPIE (April 17 1995)

Back to Top