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Topic: Motion compensation

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	High efficiency coder and method employing overlapped motion compensation and perfect reconstruction filter banks - ...
		Our overlapped motion compensation unit and method are implemented on the basis of analysis/synthesis filter banks employed for coding resulting in compatibility between the block structure used for motion compensation and for coding.
		The motion vector obtained is sent to the coding unit 200 for transmission and is used at the motion compensation unit 19 for generating the interframe prediction macroblocks appearing on lead 4.
		The values of the motion vector are also extracted by the decoding section 57 and passed on to the motion compensation unit 62.
	www.freepatentsonline.com /5311310.html (7656 words)

	DIGITAL VIDEO: COMPRESSION: Motion Compensated Compression Overview
		As described in the section on Interframe Compression techniques, block based motion compensation uses blocks from a past frame to construct a replica of the current frame.
		The motion vector describes the location of the matching block from the past frame with reference to the position of the target block in the current frame.
		Motion vectors, irrespective of how they are determined, might not correspond to the actual motion in the scene.
	www.newmediarepublic.com /dvideo/compression/adv08.html (1882 words)

	Block-Matching Motion Compensation
		Motion compensation is used as part of the predictive process.
		Motion vectors are subsequently variable length coded using a quad-tree based 2d predictor mechanism [7].
		Motion estimation is performed by matching the 16x16 blocks within a prescribed search area of the previous frame.
	www.dcs.warwick.ac.uk /research/mcg/bmmc/index.html (1712 words)

	Apparatus for processing image motion compensation information for an image processing system - Patent 5369438
		An apparatus for processing image motion compensation information for an image processing system, which can add image motion compensation information and assign the bit number suitable for a specific data size required in signal processing added data with a simple structure.
		The added image data for motion compensation should be bit-assigned in order to reduce the bit size thereof to be suitable for later signal process.
		1, an apparatus for processing image motion compensation information of the present invention comprises a section 1 for adding an inverse quantized input data for motion-compensation and a memory data stored per frame, and a section 2 for determining sign bit of the added data.
	www.freepatentsonline.com /5369438.html (2910 words)

	Citations: Overlapped block motion compensation: an estimation-theoretic approach - Orchard, Sullivan (ResearchIndex)
		Let the pixel motion vector in the kth interpolated frame be mv i (among K skipped frames) whichistobederived from four vertex MB motion vectors MV 1, MV 2, MV 3, and MV 4.Under the linear....
		OBMC involves using motion vectors of neighboring sub parts of blocks to reconstruct a subpart, thereby leading to an overall smoothing of the image and removal of blocking artifacts.
		In most cases, motion compensation (MC) is carried out by employing the immediately preceding frame which is available as the reconstructed frame at encoder and decoder.
	citeseer.ist.psu.edu /context/43092/0 (2865 words)

	[No title]
		Calculating these vectors is called motion estimation, and it requires the calculation of an absolute difference between blocks of frames.
		Orthogonal to the difference equation, this sum can be accumulated with respect to a reference block that has been shifted, either by some number of whole pixel positions or by some number of half-pixel positions.
		The sample below is a C code example for a 16 x 16-pixel full pel motion estimation using absolute differences.
	www3.intel.com /cd/ids/developer/asmo-na/eng/dc/xeon/knowledgebase/90510.htm (599 words)

	[No title]
		Acceleration starting at the first point, which we shall call the "Motion Compensation" level, begins after the the inverse quantization and IDCT at the place where motion compensation is to be applied.
		Rendering is done by presenting the library with a target XvMCSurface and up to two reference XvMCSurfaces for the motion compensation, a buffer of 8x8 blocks and a command buffer which describes how to use the 8x8 blocks along with motion compensation vectors to construct the data in the target XvMCSurface.
		For motion compensation level acceleration this is 8 bits for Intra and 9 bits for non-Intra data.
	www.xfree86.org /~mvojkovi/XvMC_API.txt (3845 words)

	GPU assisted video decoding in XBMC, like motion compensation, idct or deblocking? - Page 3 - XBMC Community Forum
		from the docs it looks like moving the motion compensation onto the gpu should be possible from a hardware having the capability standpoint.
		doing mpeg2 motion compensation with the gpu's alpha blending would be relatively painless to do.
		as for mpeg4's quarter-pel motion compensation, that might be a little more complicated (per pixel texture blending) but probably doable.
	www.xboxmediacenter.com /forum/showthread.php?p=16604 (905 words)

	Citations: Variable-Raster Multiresolution Video Processing with Motion Compensation Techniques - Ohm, Rmmler ...
		J.-R. Ohm, K. Rummler, Variable-raster multiresolution video processing with motion compensation techniques, in: Proceedings of the IEEE International Conference on Image Processing, Santa Barbara, CA, USA, 1997, pp.
		To convert the ITU channel format we applied the motion compensated de interlacing (MCD) technique described in the previous Sections and a second algorithm, based on spatio temporal filtering (STF)
		However, the second method needs a huge frame store, because the information from 3 fields is needed and the interpolation part is still quite complex compared to MCD.
	citeseer.ist.psu.edu /context/1008748/0 (538 words)

	The MathWorks - MATLAB & Simulink Based Books - Range-Doppler Radar Imaging and Motion Compensation
		Written for practicing radar engineers, this book discusses advanced methods for analyzing and synthesizing the echo transfer functions of inverse synthetic aperture radar (ISAR) targets.
		Topics covered include the burst derivative approach, phase difference method, least squares motion parameter estimation, ISAR signatures, selective motion compensation, and image enhancement.
		Companion Software: A set of MATLAB M-files is available on disk bound in the book.
	www.mathworks.com /support/books/book4762.html (109 words)

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