By Peter M. Kuhn
MPEG-4 is the multimedia commonplace for combining interactivity, normal and artificial electronic video, audio and computer-graphics. standard functions are: web, video conferencing, cellular videophones, multimedia cooperative paintings, teleteaching and video games. With MPEG-4 the next move from block-based video (ISO/IEC MPEG-1, MPEG-2, CCITT H.261, ITU-T H.263) to arbitrarily-shaped visible gadgets is taken. this crucial step calls for a brand new technique for process research and layout to satisfy the significantly better flexibility of MPEG-4.
movement estimation is a relevant a part of MPEG-1/2/4 and H.261/H.263 video compression criteria and has attracted a lot recognition in study and undefined, for the next purposes: it truly is computationally the main not easy set of rules of a video encoder (about 60-80% of the full computation time), it has a excessive impression at the visible caliber of a video encoder, and it isn't standardized, therefore being open to pageant.
Algorithms, Complexity research, and VLSI Architectures for MPEG-4Motion Estimation covers intimately each step within the layout of a MPEG-1/2/4 or H.261/H.263 compliant video encoder:
- Fast movement estimation algorithms
- Complexity research instruments
- Detailed complexity research of a software program implementation of MPEG-4 video
- Complexity and visible caliber research of quickly movement estimation algorithms inside of MPEG-4
- Design area on movement estimation VLSI architectures
- Detailed VLSI layout examples of (1) a excessive throughput and (2) a low-power MPEG-4 movement estimator.
Algorithms, Complexity research and VLSI Architectures for MPEG-4Motion Estimation is a crucial creation to varied algorithmic, architectural and method layout features of the multimedia typical MPEG-4. As such, all researchers, scholars and practitioners operating in picture processing, video coding or procedure and VLSI layout will locate this e-book of interest.
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Additional resources for Algorithms, Complexity Analysis and VLSI Architectures for MPEG-4 Motion Estimation
2 3 , , , , , , - - ~r. - .. - .. .... 01. I. 17: a) Spiral search [Ohm 95) p 152, b) diamond -shaped spiral search 40 CHAPTER 2 Note on VLSI-implementation As there exist many search strategies and research in scene-adaptive search techniques is continuing, one or several search strategies can be successfully implemented with high flexibility, using a (sequential) programmable processor. However, (parallel) VLSI support of one or several search schemes with high efficiency is extremely difficult.
6 - 4% PSNR degradation using MME, compared to the MAE criterion using the full-search method. A label-updating scheme for an efficient bit level maximum/minimum circuit that may be applicable for MME is described in [Lee 94a]. RBMAD (Reduced Bit Mean Absolute DiJJerence) In [Baek 96] the RBMAD (Reduced Bit Mean Absolute Difference) aims to reduce VLSI implementation costs. e. bit truncation) and therefore reduces the VLSI area and power consumption, while it enables a higher operating speed, as the difference unit and the adder can be of reduced wordlength.
2: 1 or 4: 1 [Liu 93: 1] or simple filter algorithms like pel averaging etc. [Cheng 96], are often used. A theoretical analysis of pel subsampling techniques is given in [Tek 95]. 0. 19: a) 2: 1, b) 4: 1 pel decimation: only the dark marked pel positions are used. 42 CHAPTER 2 A widely known algorithm for fast motion estimation using 4: 1 pel subsampling is described in [Liu 93:1] section II, where an alternating pel subsampling pattern is used, which makes it possible to take all pels of the search area successively into account.
Algorithms, Complexity Analysis and VLSI Architectures for MPEG-4 Motion Estimation by Peter M. Kuhn