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Method and device for processing video pictures, in particular for reducing false contour effects

A contour effect, picture technology, applied in the field of video processing

Inactive Publication Date: 2012-02-22
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the same number of subfields, the above scheme also suffers from too many false contours compared to the single peak code

Method used

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  • Method and device for processing video pictures, in particular for reducing false contour effects
  • Method and device for processing video pictures, in particular for reducing false contour effects
  • Method and device for processing video pictures, in particular for reducing false contour effects

Examples

Experimental program
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Embodiment Construction

[0023] In general, the concept of parallel peak codes is to always have substantially the same energy in two packets of light and to encode the codewords differently for the two packets, so that changes in the subfield codewords will not be simultaneous Appears in two block codewords. The purpose of this is to reduce false contour effects.

[0024] The invention can be used with any number of subfields. Illustrated by parallel peak encoding with 15 subfields. Consider a frame consisting of 15 subfields with the following weights:

[0025] 1-2-3-5-7-9-11-14-17-20-24-28-33-38-43

[0026] In a first step, the subfields are organized into two consecutive groups. A part of the subfield codeword is assigned to each group. These two sets of subfields are used to generate two packets of light.

[0027] For example, the odd subfields are grouped into a first group called G1, and the even subfields are grouped into a second group called G2.

[0028] G1: 1-3-7-11-17-24-33-43

[0...

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Abstract

The invention relates to a method and apparatus for processing video pictures, in particular for large area flicker effect reduction. This method concerns a new coding called Parallel Peak Coding. The general idea of the Parallel Peak Code is to have almost always the same energy in two packets of light and to encode the code words for these two packets differently so that changes in sub-field code word will not appear in the two packet code words simultaneously. This aims at reducing the false contour effect.

Description

technical field [0001] The present invention relates to a method and a device for processing video pictures, more particularly for reducing large-area flicker effects and false contour effects. [0002] More specifically, the present invention relates specifically to video processing for improving the picture quality of pictures displayed on a matrix display such as a plasma display panel (PDP), with a micro mirror array , DMD) display devices and all types of displays based on the principle of duty cycle modulation (pulse width modulation) of light emission. Background technique [0003] Although plasma display panels have been known for many years, interest in plasma displays is still growing among television manufacturers. Indeed, this technology now enables flat color plates of large size, limited thickness and without any viewing angle limitations. The size of such a display can be much larger than what a conventional CRT picture tube can allow. [0004] Much work h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/28H01J17/49G09F9/313
CPCG09G2320/0247G09G2320/0266G09G3/20G09G3/2051G09G3/28G09G2320/0261G09G3/2022G09G3/294H04N5/21H04N5/66H04N5/911
Inventor 锡德里克·特鲍尔特卡洛斯·科雷亚雷纳·兹温
Owner THOMSON LICENSING SA