Method for Compatible Transmission of Multi-Primary Color Extended Color Gamut

Abstract

The present invention relates to the video display technology field, and makes efforts to solve the problem that the CIE 1931 standard three-primary colors cannot express most of high saturation visible colored light in the nature. A multiple primary color expression method of the nature composite colors is explored; and the transmission and the storage method compatible with the CIE 1931 standard three-primary colors is discussed. The method comprises the steps: (1) employing a polygon formed by the multiple primary color component signals for analysis; (2) employing a triangle formed by other primary colors for expression aiming at the composite colors which cannot be expressed by the CIE 1931; and (3) continuing the analysis of the difference value of the chrominance component and the brightness signals aiming at the composite color signals which cannot perform standard expression by the CIE 1931, and selecting two difference values with the minimum absolute values to form U and V color difference signals. The method compatible with the multiple primary color expansion color gamut is mainly applied to the video display occasion.

Description

technical field [0001] The invention relates to the technical field of video display, in particular to a method for compatible transmission of multi-primary colors to expand the color gamut. Background technique [0002] In 1931, CIE, the International Commission on Illumination, formulated the CIE 1931 RGB system, which stipulated that 700nm red, 546.1nm green and 435.8nm blue should be used as the three primary colors. Later, the CIE 1931-xy chromaticity diagram became the most commonly used chart to describe the color range. The domain is the area covered on this graph. [0003] Due to historical reasons, the current video system has a small color gamut, which can only cover 33.25% of the visible colors in nature, and most high-saturation colors cannot be displayed. ITU-R BT.1361 and IEC61966-2-4 "Extended color gamut for video applications" have been formulated successively in 2009. These two standards transmit as many colors as possible outside the normal gamut in a w...

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the deficiencies in the prior art, the present invention aims to solve the problem that the CIE 1931 standard three primary color light cannot express most of the high-saturation visible color light in nature; explore the multi-primary color representation method of natural complex color light; and discuss the compatibility with the CIE1931 standard three primary color light method of transmission and storage

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