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Method for encoding and/or decoding groups of images

A picture and wavelet coding technology, applied in the field of coding and/or decoding groups of pictures, which can solve problems such as doubling the amount of motion information

Inactive Publication Date: 2006-06-07
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, doubling the amount of motion information compared to conventional technology

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  • Method for encoding and/or decoding groups of images
  • Method for encoding and/or decoding groups of images
  • Method for encoding and/or decoding groups of images

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Embodiment Construction

[0045] figure 1 Shown is an embodiment of a 3D wavelet compression scheme according to the prior art. It should be noted that this 3D wavelet compression scheme can also be used after performing the method of the present invention. It should also be noted that the solutions described in terms of methods can also be implemented in the form of processing modules in a computer for processing a sequence of pictures.

[0046] In step 1, a picture sequence GOP comprising N consecutive pictures is acquired or synthesized. Then, the GOP sequence is passed to the wavelet decomposition step 2, and in parallel to the step 3 of estimating motion between pictures.

[0047] The wavelet decomposition step includes: a time domain analysis step 2a and a space domain analysis step 2b (pattern repetition frequency, etc.).

[0048] In fact, in the prior art, the motion estimation step 3 starts with the selection of the base picture (the last picture of the sequence) in the sequence of GOP pic...

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Abstract

The invention relates to a method of encoding and / or decoding a group of pictures. According to the invention, within the framework of 3D wavelet processing, during the temporal decomposition of the stream of pictures, the number of pictures per GOP-type picture sequence (GOP1, GOP2, ...), the selection of reference pictures (R) and the timing of the temporal decomposition are adapted. direction (S) to minimize the number of unconnected pixels.

Description

technical field [0001] The invention relates to a method of encoding and / or decoding a group of pictures. [0002] The invention is applied in the context of video compression based on 3D wavelet decomposition. Background technique [0003] In the prior art, it has been proposed to use a 3D wavelet picture decomposition technique in which a group of pictures or GOP is decomposed according to the process of applying wavelet decomposition to a two-dimensional or 2D picture. On this basis, along the time dimension as the third dimension, compression of the data stream is performed. [0004] In the prior art, the difficulty occurs during wavelet temporal decomposition. When temporal resolution has been performed, pixels connected by motion vectors in the sequence of GOP pictures have been tagged. Now, it should be realized that when the compression operation is performed along the temporal dimension, pixels through which no motion vectors pass are lost. [0005] To solve thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N19/63H04N19/61H04N19/62H04N19/177H04N19/60
Inventor 爱德华·弗朗索瓦多米尼克·索罗纪尧姆·布瓦松
Owner THOMSON LICENSING SA