Method and device for eliminating interference noise inside signal source

A technology for eliminating signal and interference noise, applied in the field of signal processing, can solve the problems of RGB analog signal noise interference and reduce display quality, etc.

Active Publication Date: 2009-05-06
MEDIATEK INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, most personal computers use a graphics card to convert digital signals into RGB analog signals that are sent to a display (such as a liquid crystal display). Digital signals, however, RGB analog signals may be subject to noise, such as patterning or moving noise, which may be amplified during the analog-to-digital conversion process, resulting in fluctuating noise and possibly ripples on the display effect or other visual effects that are easily noticed by the user, thus greatly reducing the display quality

Method used

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  • Method and device for eliminating interference noise inside signal source
  • Method and device for eliminating interference noise inside signal source
  • Method and device for eliminating interference noise inside signal source

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Embodiment Construction

[0028] figure 1 A flow chart of a method for eliminating interference noise contained in a signal source according to a preferred embodiment of the present invention is shown. The process starts from step 100, enters step 110, first generates a digital dithering signal; in step 120, converts the digital dithering signal into an analog dithering signal; then in step 130, adds the analog image signal and the analog dithering signal , to generate a dithering image signal; at step 140, converting the dithering image signal into a digital image signal; finally, at step 150, the flow of the method ends.

[0029] Please refer to figure 2 A block diagram of an apparatus for eliminating interference noise contained in a signal source according to a preferred embodiment of the present invention is shown. The circuit 200 can be used in a digital display such as a liquid crystal display. Preferably, the circuit 200 can be integrated into a display controller of a digital display to rec...

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Abstract

The invention relates to a device and method for eliminating interference noises from a signal source, comprising the steps of: generating a digital color transmission signal; coding an offset signal and the digital color transmission signal to generate a color transmission offset signal; converting the color transmission offset signal into an analog color transmission offset signal; add the analog color transmission offset signal and analog image signal to generate a color transmission image signal; converting the color transmission image signal into a digital image signal.

Description

technical field [0001] The invention relates to a signal processing technology, in particular to a device and method for eliminating interference noise contained in a signal source. Background technique [0002] At present, most personal computers use a graphics card to convert digital signals into RGB analog signals that are sent to a display (such as a liquid crystal display). Digital signals, however, RGB analog signals may be subject to noise, such as patterning or moving noise, which may be amplified during the analog-to-digital conversion process, resulting in fluctuating noise and possibly ripples on the display effect or other visual effects that are easily noticed by the user, thus greatly reducing the display quality. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a device and method for eliminating interference noise contained in a signal source, which uses a dithering method to eliminate interferenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/36G09G5/02G06F3/14H04N11/04H04N11/00
Inventor 杨伟毅史德立容天行
Owner MEDIATEK INC
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