Fundamentals of digital image processing
Fundamentals of digital image processing
Digital Image Processing (3rd Edition)
Digital Image Processing (3rd Edition)
IEEE Transactions on Multimedia
Efficiency analysis of multihypothesis motion-compensated prediction for video coding
IEEE Transactions on Image Processing
A novel four-step search algorithm for fast block motion estimation
IEEE Transactions on Circuits and Systems for Video Technology
A novel unrestricted center-biased diamond search algorithm for block motion estimation
IEEE Transactions on Circuits and Systems for Video Technology
Modeling DCT coefficients for fast video encoding
IEEE Transactions on Circuits and Systems for Video Technology
Motion- and aliasing-compensated prediction for hybrid video coding
IEEE Transactions on Circuits and Systems for Video Technology
Fast mode decision algorithm for intraprediction in H.264/AVC video coding
IEEE Transactions on Circuits and Systems for Video Technology
Fast intermode decision in H.264/AVC video coding
IEEE Transactions on Circuits and Systems for Video Technology
Fast multiple reference frame motion estimation for H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Analysis and complexity reduction of multiple reference frames motion estimation in H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Analysis and architecture design of an HDTV720p 30 frames/s H.264/AVC encoder
IEEE Transactions on Circuits and Systems for Video Technology
Fast Algorithm and Architecture Design of Low-Power Integer Motion Estimation for H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Improvements on Fast Motion Estimation Strategy for H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Algorithms and hardware architectures for variable block size motion estimation
UIC'11 Proceedings of the 8th international conference on Ubiquitous intelligence and computing
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
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The H.264/AVC coding standard processes variable block size motion-compensated prediction with multiple reference frames to achieve a pronounced improvement in compression efficiency. Accordingly, the computation of motion estimation increases in proportion to the product of the number of reference frame and the number of intermode. The mathematical analysis in this paper illustrates that the motion-compensated prediction errors are mainly determined by the detailed textures in the source image. The image block being rich in textures contains numerous high-frequency signals, which make variable block size and multiple reference frame techniques essential. On the basis of rate-distortion theory, in this paper, the spatial homogeneity of an image block is made as a relative concept with respect to the current quantization step. For the homogenous block, its futile reference frames and intermodes can be eliminated efficiently. It is further revealed that the sum of absolute differences value of an image block is mainly determined by the sum of its edge gradient amplitude and the current quantization step. Consequently, the image content-based early termination algorithm is proposed, and it outperforms the original method adopted by JVT reference software. Moreover, the dynamic search range algorithm based on the edge gradient amplitude of source image block is analyzed. One eminent advantage of the proposed edge-based algorithms is their efficiency to the macroblock-pipelining architecture, and another desirable feature is their orthogonality to fast block-matching algorithms. Experimental results show that when these algorithms are integrated with hybrid unsymmetrical-cross multi-hexagongrid search, an averaged 31.4-60.0% motion estimation time can be saved, whereas the averaging BDPSNR loss is 0.0497 dB for all tested sequences.