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Method of coding a sequence of images and corresponding reconstruction method

An encoding method and image sequence technology, applied in the field of video encoding and decoding, which can solve the problem that the prediction mode cannot correctly propagate and predict the signal, etc.

Inactive Publication Date: 2013-09-18
THOMSON LICENSING SA
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Problems solved by technology

However, in the case of complex 2D patterns, the H.264 / AVC intra prediction mode cannot properly propagate and predict the signal

Method used

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  • Method of coding a sequence of images and corresponding reconstruction method
  • Method of coding a sequence of images and corresponding reconstruction method
  • Method of coding a sequence of images and corresponding reconstruction method

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Embodiment Construction

[0033] The invention relates to a coding method for image sequences. The encoding method is described for the current picture of the sequence. The encoding method according to the invention uses the image summary of the current image in order to encode it. The invention also relates to a corresponding reconstruction method.

[0034] figure 1 represents the encoding method according to the present invention.

[0035] At step 20, an image summary is created from the current image Icurr. According to a particular embodiment, said image summary is an abstract. However, the present invention is not limited to this outline. Any kind of summary (eg patch dictionary) can be used provided the image can be reconstructed from this summary.

[0036] In step 22, said image summary is encoded into a first stream F1. As an example, the summary is coded according to the H.264 standard using an intra-only coding mode. According to a variant, the image summary is coded according to the ...

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Abstract

The invention relates to a method of coding a sequence of images. The method of coding comprises for a current image the steps of: creating a summary of said current image; encoding said summary into a first bitstream; reconstructing an intermediate image from said summary; and encoding, into a second bitstream, the current image using said intermediate image as reference image.

Description

technical field [0001] The present invention relates to video encoding and decoding. More specifically, it relates to a method of encoding a sequence of images and a method of reconstructing the sequence. It addresses improvements to video encoding performance by maintaining the same quality for lower bitrates. Background technique [0002] When encoding an image of an image sequence, it is known to first predict the image spatially or temporally, and to encode the residual signal generated from the image prediction. Spatial prediction is also called intra prediction and temporal prediction is also called inter prediction. The ITU-T Rec.H.264 / ISO / IEC14496-10 AVC video coding standard specifies three different intra prediction modes of intra 4x4, intra 8x8 and intra 16x16 corresponding to the spatial estimation of the block to be coded. These different modes can utilize prediction modes in different directions in order to build up the pixels of the predicted block. In Int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26G06T7/40
CPCH04N19/593H04N19/91H04N19/19H04N19/99H04N19/36G06T7/40H04N19/11
Inventor S.谢里吉D.索罗P.吉洛特尔C.吉莱莫特
Owner THOMSON LICENSING SA
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