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Colour signal generating method and apparatus for television

A color signal and TV technology, applied in TV, electrical components, image communication, etc., can solve the problems of full color restoration and distortion inspection and testing, unable to express ever-changing, unable to generate color signals, etc.

Inactive Publication Date: 2007-01-31
SHENZHEN TCL NEW-TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

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Experimental program
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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 any spectral chromatic light on the color mixing curve At least one of the values ​​is a negative value, because the spectral 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 XY plane is set as:

[0135] ...

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