Wavelet image-encoding method and corresponding decoding method

A coding method, wavelet coding technology, applied in image coding, image communication, image data processing, etc.

Inactive Publication Date: 2006-02-01
FRANCE TELECOM SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] None of these prior art coding techniques are suitable for the specific content of such error images, which usually contain only high frequencies, such as contours, textures, or also singularities

Method used

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  • Wavelet image-encoding method and corresponding decoding method
  • Wavelet image-encoding method and corresponding decoding method
  • Wavelet image-encoding method and corresponding decoding method

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Embodiment Construction

[0100] The general principle of the invention is based on the application of different types of wavelets and especially second-generation wavelets to different regions of the image by selecting the wavelet whose coding characteristics are suitable for the content of the region under consideration, so that the overall coding optimization.

[0101] Before a detailed description of embodiments of the present invention, a brief review will be given of video coding and the concepts of trellis, lifting and second generation wavelets. In fact, the invention can be implemented in particular in the general context of coding of video sequences according to these different concepts.

[0102]The general principles of video coding, as described for example in document ISO / IEC (ITU-T SG8) JTC1 / SC29 WG1 (JPEG / JBIG), JPEG2000 Part I, Final Committee Draft, document N1646R, March 2000, is that Describes a sequence of images with representation in YUV plane (luminance / chroma r / chroma b), sampl...

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Abstract

The hierarchical coding process has an image which is associated with a mesh, and which is coded by wavelets. Two types of wavelets are applied selectively to distinct zones of the image.

Description

technical field [0001] The field of the invention is the coding of still or moving pictures, and in particular but not exclusively the coding of successive pictures of a video sequence. More specifically, the present invention relates to an image encoding / decoding technique in which an image has a grid associated therewith and implements a method called a wavelet method. The invention is more particularly, but not exclusively, applicable to second-generation wavelets, especially in Wim Sweldens, "The Lifting Scheme: A Construction of Second-Generation Wavelets", SIAM Journal on Mathematical Anaiysis, Vol. 29, No. 2, pp.511-546, given in the literature of 1998. Background technique [0002] The development of new transmission networks (xDSL, mobile phones using GPRS and UMTS, etc.) means that image coding and digital video compression techniques must be adapted to the heterogeneity of the network and possible fluctuations in quality of service (QoS) over time. Taking into a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26G06T9/00
CPCH04N19/00781H04N19/00818H04N7/26313H04N7/26127H04N19/00157H04N7/26468H04N7/26595H04N7/26425H04N19/00545H04N19/00084H04N19/00824H04N7/26563H04N19/0026H04N19/00012H04N19/00842H04N19/46H04N19/647H04N19/63H04N19/122H04N19/102H04N19/61H04N19/14H04N19/17H04N19/635
Inventor 塞巴斯蒂安·布朗古洛帕特里克·吉奥纳塔利·洛朗特
Owner FRANCE TELECOM SA
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