CN1797507A - Method and device for eliminating interference noise inside signal source - Google Patents
Method and device for eliminating interference noise inside signal source Download PDFInfo
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- CN1797507A CN1797507A CN 200410103514 CN200410103514A CN1797507A CN 1797507 A CN1797507 A CN 1797507A CN 200410103514 CN200410103514 CN 200410103514 CN 200410103514 A CN200410103514 A CN 200410103514A CN 1797507 A CN1797507 A CN 1797507A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004088 simulation Methods 0.000 claims description 41
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract 8
- 238000007792 addition Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
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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
The present invention relates to a kind of signal processing technology, particularly relate to the devices and methods therefor that the erasure signal source includes interference noise.
Background technology
At present, most personal computer uses video card, digital signal is converted to the RGB simulating signal that is sent to display (as: LCD), display comprises analog-digital converter, the RGB analog signal conversion is become show image or the required digital signal of image, but, the RGB simulating signal may be subjected to noise, as: patterning or portable noise, this interference noise may be exaggerated in carrying out the analog digital transfer process, and on display, produce wave noise, and the visual effect that may cause ripple effect or other to allow the user notice easily, display quality therefore significantly reduced.
Summary of the invention
Technical matters to be solved of the present invention is to provide a kind of erasure signal source to include the devices and methods therefor of interference noise, utilizes and passs the interference noise that the look mode comes the erasure signal source to contain.
The present invention discloses a kind of in order to analog picture signal is converted to the method for data image signal, and its step comprises: produce numeral and pass chrominance signal; Shifted signal and numeral are passed chrominance signal encode, produce and pass the color shift signal; To pass the color shift conversion of signals becomes simulation to pass the color shift signal; Color shift signal and analog picture signal addition are passed in simulation, produce and pass the color image signal; To pass the color image conversion of signals and become data image signal.
For realizing above-mentioned purpose, the invention provides in order to analog picture signal is converted to the device of data image signal, comprising: pseudorandom sequence generator, digital analog converter, add and grow up to be a useful person and analog-digital converter.The pseudorandom sequence generator is passed look (dither) signal in order to produce numeral; Digital analog converter converts simulation to and passs chrominance signal in order to numeral is passed chrominance signal; Adding grows up to be a useful person passs the color image signal in order to pass the generation of chrominance signal and analog picture signal according to simulation; Analog-digital converter becomes data image signal in order to will pass the color image conversion of signals.
In addition, the invention provides, comprising: the pseudorandom sequence generator, stir a yard device, digital analog converter, add and grow up to be a useful person and analog-digital converter in order to analog picture signal is converted to the device of data image signal.The pseudorandom sequence generator is passed chrominance signal in order to produce numeral; Stir yard device in order to receive shifted signal, encode by itself and numeral are passed chrominance signal, the color shift signal is passed in generation; Digital analog converter becomes simulation to pass the color shift signal in order to will pass the color shift conversion of signals; Adding grows up to be a useful person passs the color image signal in order to pass the generation of color shift signal and analog picture signal according to simulation; Analog-digital converter becomes data image signal in order to will pass the color image conversion of signals.
And, the invention provides a kind ofly in order to analog picture signal is converted to the method for data image signal, its step comprises: produce numeral and pass chrominance signal; Numeral is passed chrominance signal to be converted simulation to and passs chrominance signal; Chrominance signal and analog picture signal addition are passed in simulation, produce and pass the color image signal; To pass the color image conversion of signals and become data image signal.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is for including the method flow diagram of interference noise according to preferred embodiment of the present invention in order to the erasure signal source;
Fig. 2 is the circuit block diagram of preferred embodiment of the present invention;
Fig. 3 is the circuit block diagram of another preferred embodiment of the present invention;
Fig. 4 is the present invention's circuit block diagram of another preferred embodiment again.
The figure number explanation:
205～pseudorandom sequence generator; 210～numeral is passed chrominance signal;
220～digital analog converter; Chrominance signal is passed in 230～simulation;
240～add and grow up to be a useful person; 250～eliminate the picture signal of undesired signal;
260～analog-digital converter;
305～pseudorandom sequence generator; 310～numeral is passed chrominance signal;
320～totalizer; 330～shifted signal;
340～pass the color shift signal; 350～skew digital analog converter;
The color shift signal is passed in 360～simulation; 370～add and grow up to be a useful person;
380～eliminate the picture signal of undesired signal; 390～analog-digital converter;
405～pseudorandom sequence generator; 410～numeral is passed chrominance signal;
420～stir a yard device; 430～pass the look coded signal;
440～pass the color shift signal; 450～skew digital analog converter;
The color shift signal is passed in 460～simulation; 470～add and grow up to be a useful person;
480～eliminate the picture signal of undesired signal; 490～analog-digital converter.
Embodiment
Fig. 1 shows and to include the method flow diagram of interference noise according to preferred embodiment of the present invention in order to the erasure signal source.This flow process enters step 110 from step 100, at first produces numeral and passs chrominance signal; In step 120, numeral is passed chrominance signal convert simulation to and pass chrominance signal; Then, analog picture signal and simulation are passed the chrominance signal addition, pass the color image signal with generation in step 130; In step 140, will pass the color image conversion of signals and become data image signal; At last in step 150 method ends flow process.
Please refer to Fig. 2 shows and to include the device calcspar of interference noise according to preferred embodiment of the present invention in order to the erasure signal source.Circuit 200 can be used in as: in the digital indicator of LCD, preferable, circuit 200 can be incorporated among the display controller of digital indicator, in order to receive analog picture signal Vin, and convert thereof into data image signal by analog digital conversion, what need pay special attention to is that " picture signal " of indication represented any image, image or video signal in this instructions.
As shown in Figure 2, circuit 200 comprises: pseudorandom sequence generator 205, digital analog converter 220, add and grow up to be a useful person 240 and analog-digital converter 260.Circuit 200 receives and treatment of simulated picture signal Vin, to produce data image signal Dout, analog picture signal Vin can be by main frame, the video-tape player, the VCD player, DVD player or similar device provide, but, the analog picture signal Vin that is transmitted by the unlike signal source may be subjected to noise, as: patterning or portable noise, this interference noise may be because of the effect that quantizes gain, and in carrying out the analog digital transfer process, be exaggerated, therefore, data image signal Dout by analog picture signal conversion gained can have interference noise, and produces wave noise on digital indicator.
According to the present invention, pseudorandom sequence generator 205 is passed chrominance signal 210 in order to produce numeral, therefore numeral is passed chrominance signal 210 by the form generation of pseudorandom sequence generator 205 with the pseudorandom sequence, this pseudorandom sequence is (semi-random) sequence partly at random, also be that its sequence length is a random length, reach the demand of randomness, but whole group sequence can repeat aperiodically but.The detailed circuit of pseudorandom sequence generator can " be suitable for slip-stick artist's pseudo noise sequence " with reference to the article that R.N.Mutagi1996 April is delivered on " telecommunications engineering magazine " the 79th～87 page (" Pseudo Noise Sequence forEngineers " Electronics; Communication Engineering Journal, April 1996, pp.79-87).In the application of the controller of LCD, the length of pseudorandom sequence can show the sum of the picture element (pixel) of picture frame (frame) greater than image.
Digital analog converter 220 is respectively with pseudorandom sequence generator 205 and add to grow up to be a useful person and 240 link to each other, digital analog converter 220 is passed chrominance signal 230 in order to the simulation of numeral being passed chrominance signal 210 and converting near random to, this simulation is passed chrominance signal 230 by adding 240 receptions of growing up to be a useful person, therefore, adding grows up to be a useful person 240 passs chrominance signal 230 with simulation and introduces analog picture signal Vin, because it is half random series that numeral is passed chrominance signal 210, can pass chrominance signal 230 by adding simulation, and the undesired signal that elimination analog picture signal Vin includes, make and add the picture signal 250 that undesired signal has been eliminated in 240 generations of growing up to be a useful person, the picture signal 250 of having eliminated undesired signal continues to deliver to analog-digital converter 260 again, makes further signal Processing.
Analog-digital converter 260 receives the picture signal 250 of having eliminated undesired signal, and convert thereof into corresponding data image signal Dout, because by analog picture signal Vin and simulation are passed chrominance signal 230 additions, so that interference noise is eliminated, interference noise is reduced by the data image signal Dout of the picture signal 250 conversion gained of eliminating undesired signal.
Please refer to the calcspar of another preferred embodiment circuit 300 of Fig. 3 the present invention.As shown in Figure 3, circuit 300 comprises: pseudorandom sequence generator 305, totalizer 320, skew digital analog converter 350, add and grow up to be a useful person 370 and analog-digital converter 390.Skew digital analog converter 350 be present in display controller in, to handle shifted signal 330; In the present embodiment, digital analog converter 350 is to be used for handling skew and passing chrominance signal in mode cheaply.
Microprocessor is according to brightness adjustment that the user did, produce shifted signal 330, for example, shifted signal 330 is eight signal OFFSET[7:0], totalizer is then passed chrominance signal 310 additions in order to the numeral that shifted signal 330 and pseudorandom sequence generator 305 are produced, and passs color shift signal 340 and produce.
Skew digital analog converter 350 is passed color shift signal 360 in order to the simulation that will pass color shift signal 340 and convert near random to, this simulation is passed color shift signal 360 by adding 370 receptions of growing up to be a useful person, therefore, adding grows up to be a useful person 370 passs color shift signal 360 with simulation and introduces analog picture signal Vin, because it is half random series that numeral is passed chrominance signal 340, can pass color shift signal 360 by adding simulation, and the undesired signal that elimination analog picture signal Vin includes, make and add the picture signal 380 that undesired signal has been eliminated in 370 generations of growing up to be a useful person, the picture signal 380 of having eliminated undesired signal continues to deliver to analog-digital converter 390 again, makes further signal Processing.
Analog-digital converter 390 receives the picture signal 380 of having eliminated undesired signal, and convert thereof into corresponding data image signal Dout, because by analog picture signal Vin and simulation are passed 360 additions of color shift signal, interference noise is eliminated, the data image signal Dout that changes gained by the picture signal 380 of eliminating undesired signal reduces interference noise.
Please refer to the calcspar of another preferred embodiment circuit 400 of Fig. 4 the present invention.As shown in Figure 4, circuit 400 comprises: pseudorandom sequence generator 405, stir yard device 420, skew digital analog converter 450, add and grow up to be a useful person 470 and analog-digital converter 490.Skew digital analog converter 450 is present among the display controller, to handle shifted signal OFFSET; In the present embodiment, digital analog converter 450 is used for handling skew and passing chrominance signal in mode cheaply.
Microprocessor is according to brightness adjustment that the user did, produce shifted signal OFFSET, for example, shifted signal OFFSET is eight signal OFFSET[7:0], one or two Least Significant Bit (Least significant bit in this shifted signal, LSB) be sent to and stir yard device 420, stirring numeral that yard device 420 produced itself and pseudorandom sequence generator 405 again passs chrominance signal 410 and encodes, as shown in Figure 4, stir yard device 420 with two Least Significant Bit OFFSET[1:0] pass chrominance signal 410 and encode with numeral, pass look coded signal 430 with generation, with DO[1:0] representative, pass look coded signal DO[1:0] 430 with shifted signal OFFSET[7:2] be combined into again and pass color shift signal 440, with DO[7:0] representative.
Skew digital analog converter 450 is passed color shift signal 460 in order to the simulation that will pass color shift signal 440 and convert near random to, this simulation is passed color shift signal 460 by adding 470 receptions of growing up to be a useful person, therefore, adding grows up to be a useful person 470 passs color shift signal 460 with simulation and introduces analog picture signal Vin, because it is half random series that numeral is passed chrominance signal 410, can pass color shift signal 460 by adding simulation, and the undesired signal that elimination analog picture signal Vin includes, make and add the picture signal 480 that undesired signal has been eliminated in 470 generations of growing up to be a useful person, the picture signal 480 of having eliminated undesired signal continues to deliver to analog-digital converter 490 again, makes further signal Processing.
Analog-digital converter 490 receives the picture signal 480 of having eliminated undesired signal, and convert thereof into corresponding data image signal Dout, because by analog picture signal Vin and simulation are passed 460 additions of color shift signal, so that interference noise is eliminated, the data image signal Dout that changes gained by the picture signal 480 of eliminating undesired signal reduces interference noise.In addition, circuit as shown in Figure 4 can be by being limited in Least Significant Bit with the pseudorandom sequence effect, and solved the nonlinear problem of digital analog converter.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1, a kind of erasure signal source includes the method for interference noise, in order to convert an analog picture signal to a data image signal, it is characterized in that, comprises the following steps:
Produce a numeral and pass chrominance signal;
One shifted signal and this numeral are passed chrominance signal stir sign indicating number and handle, produce a numeral and pass the color shift signal;
This numeral is passed the color shift conversion of signals becomes a simulation to pass the color shift signal;
This analog picture signal and this simulation are passed the color shift signal plus, pass the color image signal to produce one; And
This is passed the color image conversion of signals become this data image signal.
2, a kind of erasure signal source includes the device of interference noise,, it is characterized in that this device comprises in order to convert an analog picture signal to a data image signal:
One pseudorandom sequence generator is passed chrominance signal in order to produce a numeral;
One digital analog converter converts a simulation to and passs chrominance signal in order to this numeral is passed chrominance signal;
One adds and grows up to be a useful person, and produces one and passs the color image signal in order to pass chrominance signal and this analog picture signal according to this simulation; And
One analog-digital converter becomes this data image signal in order to this is passed the color image conversion of signals.
3, device as claimed in claim 2 is characterized in that, this adds to grow up to be a useful person passs the color image signal in order to this analog picture signal and this simulation are passed the chrominance signal addition and produced this.
4, a kind of erasure signal source includes the device of interference noise,, it is characterized in that this device comprises in order to convert an analog picture signal to a data image signal:
One pseudorandom sequence generator is passed chrominance signal in order to produce a numeral;
One stirs a yard device, in order to receiving a shifted signal, encodes by this shifted signal and this numeral are passed chrominance signal, produces a numeral and passs the color shift signal;
One digital analog converter becomes simulation to pass the color shift signal in order to this numeral is passed the color shift conversion of signals;
One adds and grows up to be a useful person, and produces one and passs the color image signal in order to pass color shift signal and this analog picture signal according to this simulation; And
One analog-digital converter becomes this data image signal in order to this is passed the color image conversion of signals.
5, device as claimed in claim 4 is characterized in that, this adds grows up to be a useful person in order to this analog picture signal and this simulation are passed the color shift signal plus.
6, device as claimed in claim 4 is characterized in that, this stirs yard device and encodes in order at least one Least Significant Bit in the middle of this shifted signal and this numeral are passed chrominance signal.
7, a kind of erasure signal source includes the device of interference noise,, it is characterized in that this device comprises in order to convert an analog picture signal to a data image signal:
One pseudorandom sequence generator is passed chrominance signal in order to produce a numeral;
One totalizer in order to receive a shifted signal, by this shifted signal and this numeral are passed the chrominance signal addition, produces one and passs the color shift signal;
One digital analog converter becomes simulation to pass the color shift signal in order to this is passed the color shift conversion of signals;
One adds and grows up to be a useful person, and produces one and passs the color image signal in order to pass color shift signal and this analog picture signal according to this simulation; And
One analog-digital converter becomes this data image signal in order to this is passed the color image conversion of signals.
8, device as claimed in claim 7 is characterized in that, this adds grows up to be a useful person in order to this analog picture signal and this simulation are passed the color shift signal plus.
9, device as claimed in claim 7 is characterized in that, this totalizer is encoded in order at least one Least Significant Bit in the middle of this shifted signal and this numeral are passed chrominance signal.
10, a kind of erasure signal source includes the method for interference noise,, it is characterized in that this method comprises the following steps: in order to convert an analog picture signal to a data image signal
Produce a numeral and pass chrominance signal;
This numeral is passed chrominance signal to be converted a simulation to and passs chrominance signal;
This analog picture signal and this simulation are passed the chrominance signal addition, pass the color image signal to produce one; And
This is passed the color image conversion of signals become this data image signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101035146A CN100485745C (en) | 2004-12-29 | 2004-12-29 | Method and device for eliminating interference noise inside signal source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101035146A CN100485745C (en) | 2004-12-29 | 2004-12-29 | Method and device for eliminating interference noise inside signal source |
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| CN1797507A true CN1797507A (en) | 2006-07-05 |
| CN100485745C CN100485745C (en) | 2009-05-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567089B (en) * | 2008-04-24 | 2011-12-28 | 成越科技股份有限公司 | Image color transferring device and method thereof |
| CN109754733A (en) * | 2017-11-02 | 2019-05-14 | 联咏科技股份有限公司 | The sensing device and its operating method of display panel |
| CN115189786A (en) * | 2021-04-02 | 2022-10-14 | 瑞昱半导体股份有限公司 | Method for measuring noise of device under test and measuring apparatus |
-
2004
- 2004-12-29 CN CNB2004101035146A patent/CN100485745C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567089B (en) * | 2008-04-24 | 2011-12-28 | 成越科技股份有限公司 | Image color transferring device and method thereof |
| CN109754733A (en) * | 2017-11-02 | 2019-05-14 | 联咏科技股份有限公司 | The sensing device and its operating method of display panel |
| CN115189786A (en) * | 2021-04-02 | 2022-10-14 | 瑞昱半导体股份有限公司 | Method for measuring noise of device under test and measuring apparatus |
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| Publication number | Publication date |
|---|---|
| CN100485745C (en) | 2009-05-06 |
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Effective date of registration: 20200413 Address after: No.1, Duhang 1st Road, Hsinchu City, Hsinchu Science Park, Taiwan, China Patentee after: MEDIATEK Inc. Address before: Hsinchu County, Taiwan, China Patentee before: MSTAR SEMICONDUCTOR Inc. |
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