Guido M. Schuster's Rate-Distortion Based Video Compression: Optimal Video Frame PDF

By Guido M. Schuster

ISBN-10: 1441951725

ISBN-13: 9781441951724

ISBN-10: 1475725663

ISBN-13: 9781475725667

One of the main exciting difficulties in video processing is the removing of the redundancy or the compression of a video sign. There are lots of purposes which depend upon video compression. facts compression represents the permitting know-how at the back of the multimedia and electronic tv revolution. In movement compensated lossy video compression the unique video series is first break up into 3 new assets of data, segmentation, movement and residual blunders. those 3 info resources are then quantized, resulting in a discounted cost for his or her illustration but in addition to a distorted reconstructed video series. After the decomposition of the unique resource into segmentation, mo­ tion and residual mistakes details is set, the main last challenge is the allocation of the on hand bits into those 3 resources of knowledge. during this monograph a thought is constructed which gives an answer to this primary bit allocation challenge. it may be utilized to all quad-tree-based movement com­ pensated video coders which use a primary order differential pulse code modulation (DPCM) scheme for the encoding of the displacement vector box (DVF) and a block-based remodel scheme for the encoding of the displaced body vary­ ence (DFD). An optimum movement estimator which leads to the smallest DFD strength for a given bit fee for the encoding of the DVF can also be because of the this conception. this sort of movement estimator is used to formulate a movement compensated interpolation scheme which includes a worldwide smoothness constraint for the DVF.

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Extra resources for Rate-Distortion Based Video Compression: Optimal Video Frame Compression and Object Boundary Encoding

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Consider Fig. 6 which shows a three level pyramid decomposition of an original video sequence which is the finest level of the pyramid. The different spatial levels are achieved by decimating by a Review of lossy video compression 37 factor of two and the temporal levels are generated by simply frame skipping. The coarse levels are encoded independently and they represent the lowest quality approximation of the original video sequence. If a higher spatial resolution is desired, the coarse levels can be used to interpolate the middle levels, and this interpolation is then corrected using the encoded interpolation error.

In [23] for the first time a simple face was dis- Review of lossy video compression 41 played in real time using a vector display. Current research uses mainly 3D models because of the additional degrees of freedom these models offer. This comes with a high price though. Animating such a model is computationally expensive and so far we know of only one case where the animation of a complex model is done in real time [122] using high speed equipment. There are two trends in the field of 3D facial animation which are best represented by the work of their respective inventors, Parke and Waters.

34 CHAPTER 2 predicted frame is added to this quantized DCT, the reconstructed frame is generated. 3 THREE DIMENSIONAL WAVEFORM CODING In this section we discuss some schemes in which motion compensation is not explicitly performed in the spatial domain, but the three-dimensional signal statistics are used for the compression of a given space-time volume. The last scheme, pyramid coding, does contain explicit motion compensation in the spatial domain, but in a different fashion than presented in the previous section.

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Rate-Distortion Based Video Compression: Optimal Video Frame Compression and Object Boundary Encoding by Guido M. Schuster

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