Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2011-03-01
2011-03-01
Ahmed, Samir A (Department: 2624)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C375S240120, C375S240240, C375S240270
Reexamination Certificate
active
07899119
ABSTRACT:
A method and device for coding an image of a video sequence by image block using the time correlation between images based on movement field calculation. The method includes subdividing the images into blocks of images and a step for configuring the blocks into regions. A region corresponds to a succession of consecutive or non-consecutive blocks, according to the television scanning order of the image. In the inter- or intra-block coding step, the blocks are coded by region according to an ordering of the regions and a region according to the order of succession of the blocks that make up the region. The coded block error correction step includes analyzing the field of movement, a configuring step, and an error correction step. The step for analyzing the field of movement is carried out to calculate a “lifespan” parameter assigned to a block and corresponding to its probability of existence in subsequent images, according to the movement vector associated with this block. The configuring step is performed taking into account the value of this parameter to define and order the regions of the image from most important to least important. The error correction step uses a more effective error correction algorithm for the coded data corresponding to the most important regions than for the data corresponding to the least important regions.
REFERENCES:
patent: 2003/0206590 (2003-11-01), Krishnamachari
patent: WO 02/102083 (2002-12-01), None
patent: WO 02/102084 (2002-12-01), None
“FMO: Flexible Macroblock Ordering”, Stephan Wenger and Michael Horowitz; Apr. 30, 2002, pp. 1-10; Source: Teles AG and Polycom Inc., ITU-T Sector Members.
Search Report dated May 17, 2005.
Francois Edouard
Lorette Anne
Thoreau Dominique
Ahmed Samir A
Eriksen Guy H.
Kiel Paul P.
Li Ruiping
Shedd Robert D.
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