Coding scheme based on acquisition of three primary colors with widest sensible color gamut

A coding scheme and technology of three primary colors, applied in the field of coding schemes based on obtaining the three primary colors of the widest perceivable color gamut, can solve problems such as insufficient color gamut coverage, resolution that cannot meet the requirements of the reproduction scene, etc.

Inactive Publication Date: 2010-05-19
TIANJIN UNIV
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Problems solved by technology

On the other hand, the consumer market also has higher and higher requirements for display effects. Just improving the definition can no longer meet people's requirements for real reproduction scenes, and the color reproduction ability is also becoming an important indicator to measure the display effect of the display.
[0003] The current general-purpose TV system is still based on early scientific and technological achievements, and the system parameters are selected according to the characteristics of CRT,

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  • Coding scheme based on acquisition of three primary colors with widest sensible color gamut
  • Coding scheme based on acquisition of three primary colors with widest sensible color gamut
  • Coding scheme based on acquisition of three primary colors with widest sensible color gamut

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[0034] The present invention is based on the ITU-R BT.1361 standard, and derives the widest perceptible color gamut corresponding to the standard and a coding implementation scheme.

[0035] ITU-R BT.1361 is a wide color gamut standard for video systems, with the Pointer color gamut as the target color gamut, specifying the red, green, and blue primary colors gamma-corrected input signal L R , L G , L B The dynamic range of is [-0.25, 1.33]. Obviously when the signal L R , L G , L B When the values ​​are randomly selected within this range, some constructed colors will be outside the tongue-shaped spectral curve, that is, invisible to human eyes.

[0036] In order to obtain the widest perceivable color gamut defined by the range [-0.25, 1.33], the present invention uses the method of traversal point calculation, that is, let L R , L G , L B Values ​​are randomly selected within the range of [-0.25, 1.33], and all perceivable colors are obtained by comparing the color c...

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Abstract

The invention relates to digital television and wide color gamut theory and technology, in particular to a coding scheme based on the acquisition of three primary colors with the widest sensible color gamut and corresponding to ITU-R BT.1361. The coding scheme based on the acquisition of the three primary colors with the widest sensible color gamut uses an ergodic point taking calculation method which comprises the following steps: taking values at random in a range of -0.25 to 1.33 respectively by gamma correction input signals LR, LG and LB; and comparing a color formed by each group of taken values with a tongue-shaped spectrum curve to obtain all sensible colors; and deducing to obtain the three primary colors with the widest sensible color gamut corresponding to the ITU-R BT.1361 according to the characteristics of a color bar signal, and deducing the coding realization scheme based on the three primary colors with the widest sensible color gamut. The invention is mainly applied to compatible data transmission in a color television system.

Description

technical field [0001] The invention relates to digital television, wide color gamut theory and technology. Specifically, it relates to a coding scheme corresponding to ITU-R BT.1361 based on obtaining the three primary colors of the widest perceivable color gamut. technical background [0002] With the rapid development of modern technology and industry, a variety of new display devices and display technologies have emerged in recent years. In addition to the traditional cathode ray tube (CRT), liquid crystal display (LCD), plasma display (PDP), digital optical processing A variety of new display devices such as DLP, liquid crystal display on silicon (LCoS), light-emitting diode backlight liquid crystal display (LED-LCD) have been put into practical use or have been successfully developed. In terms of display methods, in addition to the direct view type, front projection, rear projection and laser projection displays have also been put into practical use. These new high-e...

Claims

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Application Information

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IPC IPC(8): H04N11/04H04N11/24
Inventor 徐岩李桂苓李彦潘榕李奕
Owner TIANJIN UNIV
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