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Color signal generating method and apparatus for television

A color signal and television technology, applied in the direction of television, electrical components, image communication, etc., can solve the problems of unable to use TV, unable to generate color signal, unable to express the ever-changing and so on

Inactive Publication Date: 2010-01-20
SHENZHEN TCL NEW-TECH CO LTD
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

Existing color signal generators are generally installed in TV sets. Due to the limitations of test methods and conditions, the video signals that can be generated are generally standard color bars, grayscale, monochrome fields, multi-burst and other signals. It can only Produce red, green, blue three primary colors and magenta, yellow, cyan three saturated colors and white seven color signals, can not express other unsaturated colors and their ever-changing mixed colors
However, the color signals broadcasted by TV in real time often include all the colors in the color areas such as skin color, blue sky, and grass. Therefore, such a signal generator cannot be used for full color restoration and distortion of TV because it cannot generate more types of color signals. inspection and testing of

Method used

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  • Color signal generating method and apparatus for television
  • Color signal generating method and apparatus for television
  • Color signal generating method and apparatus for television

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Embodiment Construction

[0128] The color mixing curve of the three primary colors of imaging is as follows Figure 4 shown.

[0129] Depend on Figure 4 It can be seen that the r of any spectral chromatic light on the color mixing curve e (λ), g e (λ), b e At least one of the (λ) values ​​is a negative value, because the spectral color locus on the x-y chromaticity diagram is outside the color triangle formed by the three primary colors of phosphor imaging.

[0130] Next, calculate the YCrCb value for each point in the chromaticity map:

[0131] e) Correspond the x-axis and y-axis in the XYZ chromaticity diagram with the x-direction and y-direction on the TV screen.

[0132] Specific instructions:

[0133] 3) The color resolutions in the X direction and Y direction of the chroma signal generator are respectively: N xresolution and N yresolution , for the convenience of calculation, take N xresolution =256,N yresolution =144.

[0134] The coordinate area of ​​the chromaticity diagram in the...

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Abstract

The invention relates to a method and device for generating the colorful television signals, which consists of a memory device, a programmable logic device, a video encoder chip, a video decoder chip. The color values of each detecting point are calculated and saved to the corresponding addresses, then the color values are read at the corresponding address and transformed to the standard video-data format which are input to the input terminus of TV.

Description

【Technical field】 [0001] The invention relates to a video signal generation method and device, in particular to a full-color video signal generation method and device for TV signal inspection and testing. 【Background technique】 [0002] In the production process of TV, it is often necessary to check and test the color-related functions of the TV by using a color signal generating device. Existing color signal generators are generally installed in TV sets. Due to the limitations of test methods and conditions, the video signals that can be generated are generally standard color bars, grayscale, monochrome fields, multi-burst and other signals. It can only It produces three primary colors of red, green, and blue, three saturated colors of magenta, yellow, and cyan, and seven color signals of white. It cannot express other unsaturated colors and their ever-changing mixed colors. However, the color signals broadcasted by TV in real time often include all the colors in the color...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/02
Inventor 黄凯华孟凯旋杨红
Owner SHENZHEN TCL NEW-TECH CO LTD