Invention Grant
- Patent Title: Method and device for coding a sequence of source images
- Patent Title (中): 用于对源图像序列进行编码的方法和装置
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Application No.: US11237421Application Date: 2005-09-28
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Publication No.: US07899119B2Publication Date: 2011-03-01
- Inventor: Dominique Thoreau , Edouard Francois , Anne Lorette
- Applicant: Dominique Thoreau , Edouard Francois , Anne Lorette
- Applicant Address: FR Boulogne-Billancourt
- Assignee: Thomson Licensing
- Current Assignee: Thomson Licensing
- Current Assignee Address: FR Boulogne-Billancourt
- Agent Robert D. Shedd; Paul P. Kiel; Guy H. Eriksen
- Priority: FR0452179 20040928
- Main IPC: H04N7/12
- IPC: H04N7/12

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.
Public/Granted literature
- US20060114996A1 Method and device for coding a sequence of source images Public/Granted day:2006-06-01
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