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Conversion method of video signal format

A conversion method and technology for image signals, which are applied to color signal processing circuits, luminance and chrominance signal processing circuits, etc., can solve the problems of heavy burden, difficult execution, low processing efficiency, etc., and reduce the amount of calculation and reduce the amount of calculation. , the effect of improving processing efficiency

Inactive Publication Date: 2008-01-09
LEJIN ELECTRONICS KUNSHAN COMPUTER CO LTD
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Problems solved by technology

[0031] However, in the color mode conversion operation process of the above , the R, G and B values ​​are obtained and the obtained 16 bits are edited into 8 bits, and RGB5-6-5 formatting is performed on it, which is in Difficult to implement on a smaller device like a cell phone
[0032] Handling so many calculations in the microprocessor of the mobile phone has the disadvantages of heavy burden and low processing efficiency

Method used

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  • Conversion method of video signal format
  • Conversion method of video signal format
  • Conversion method of video signal format

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Embodiment Construction

[0063] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0064] FIG. 2 is a schematic diagram illustrating the process of formatting R, G, B data in the present invention.

[0065] As shown in Fig. 2, in order to obtain the final values ​​R'=R / 8 and B'=B / 8 for the luminance (Y) and color difference (Cr, Cb) signals in the format shown in Fig. 2 and Fig. 3, the Y and Cr, Cb are formatted with 3 bits (8) (Equation 2 and Equation 3 below)

[0066] R ′ = R 8 = ( 1.164 sY + 1.793 sCr - 1.164 s 16 - 1.793 s 128 ) 8

[0067] ...

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Abstract

The method comprises: using a previously-calculated look-up table to convert pixel brightness (Y) and chromatic aberration (Cr, Cb) data to tricolor (RGB) data in order to reduce the computational complexity in converting video signals. Said brightness (Y) and chromatic aberration (Cr, Cb) signals are divided by a certain value; the desired variable values are figured out in the RGB transition and are used to form a look-up table; figuring out variable value R and B value from the look-up table; respectively figuring out the G value; composing said obtained values based on RGB sequence; getting the converted RGB value.

Description

technical field [0001] The present invention relates to an image processing method, more particularly, to using a look-up table calculated in advance to convert the luminance (Y) and color difference (Cr, Cb) data of pixels into three primary colors (RGB), thereby reducing the A video signal format conversion method that requires complicated calculations when converting video signals. Background technique [0002] The image processing system of the YCrCb format using image data is an MPEG image processing system. It does not use the RGB format, but uses the YCrCb format to improve compression efficiency. [0003] Since people's visual sensitivities to R, G, and B are different from each other, they are converted into luminance component (or luminance signal) Y and color difference component (or color difference signal) Cr, Cb, using people's visual characteristics, Compression is performed. [0004] In fact, in MPEG, the sampling ratio of the luminance component and the c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/77H04N9/64
Inventor 尹度铉
Owner LEJIN ELECTRONICS KUNSHAN COMPUTER CO LTD