CN1738360A - Input signal discriminating device and method for image display equipment - Google Patents
Input signal discriminating device and method for image display equipment Download PDFInfo
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- CN1738360A CN1738360A CN 200410050265 CN200410050265A CN1738360A CN 1738360 A CN1738360 A CN 1738360A CN 200410050265 CN200410050265 CN 200410050265 CN 200410050265 A CN200410050265 A CN 200410050265A CN 1738360 A CN1738360 A CN 1738360A
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Abstract
The invention relates to a input signal judging device for using the electrical level of synchronizing signal to separate the 480i, 480p-720p, 1080i and separate the 480p and 1080i image display device originally and its relative method. The invention comprises: a horizontal synchronous signal separator for separating the synchronous signals from the input image signals; the first mode judger for detecting the synchronous signal electrical level of the separating operation of said horizontal synchronous signal separator for judging the 480i/480p and the 720p/1080i; the second mode judger for distinguishing the 480i and the 480p judged by the first mode judger; a image signal processor for displaying the relative image signal according to input mode judged by the first or second mode judger; and a microprocessor. The invention can prevent the condition that the picture cannot be displayed which is coursed by the mistake-judgment in the pattern recognition, so the effect of minimizing the load of microprocessor can be realized.
Description
Technical field
The present invention relates to a kind of TV, especially do not distinguish private port about outside input and element input, even if both sides are arbitrarily continuous, the also input signal distinguishing device and method of the television set of judgment signal automatically.
Background technology
In recent years, along with increase in demand, Digital Television is concerned about also increase constantly to high picture quality.So-called digital television signal, exactly for quadrature amplitude balance system NTSC, the pixel of signal is 480p, 720p, 1080i, and utilizes and show after the common unit set-top box received signal.
And, when sort signal receives in Digital Television, after need distinguishing signal appropriate signal is converted, therefore very important function is distinguished and selected to signal.
That is, though the standard of signal exists, there are the factors such as incorrectness of error or signal in the device set-top box, so during the judgment signal pattern, these factors produce the back and work the parameter that happens suddenly.
Below, with reference to accompanying drawing, the input signal distinguishing device of conventional art TV is carried out following explanation.
Fig. 1 is the input signal distinguishing device block diagram of conventional art TV; Fig. 2 is the input signal distinguishing method flow diagram of conventional art TV.
The input signal distinguishing device of conventional art TV as shown in Figure 1, it is to be made of following structure: for reception has the signal input part 10 that the picture signal input of diversified signal mode is provided with; By in the signal of signal input part 10 inputs, isolate the horizontal-drive signal separated part 20 of horizontal-drive signal; The horizontal-drive signal that the horizontal-drive signal separated part 20 that receives is separated is differentiated input pattern and the microprocessor 30 that is provided with; According to the control signal of microprocessor 30, the switching part 40 that switches by input pattern; According to the switch instances of switching part 40, different separately modes is handled the picture signal handling part 50 of picture signal mutually; The display part 60 that is provided with for the output of display image signals handling part 50 on the picture.
Following explanation is done in above-mentioned picture signal discriminating gear action.
At first, if by signal input part 10 input 480i or 480p ∽ 1080i, then the horizontal-drive signal separated part 20, from above-mentioned input signal, isolate horizontal-drive signal after, output to microprocessor 30.
The synchronous signal frequency of 30 pairs of inputs of microprocessor is counted, and differentiates frequency with count value, and with after differentiating the result and distinguishing input signal pattern, the pattern after distinguishing is input to picture signal handling part 50, to switching part 40 output control signals.
Picture signal handling part 50 if imported the 480i signal, then for this signal can be shown, carries out signal processing in mutual different mode on picture.
And display part 60 shows the signal after handling in the picture signal handling part 50.
That is, the input signal distinguishing method to above-mentioned conventional art image display is described as follows with reference to Fig. 2.At first, in the picture signal of input, isolate horizontal-drive signal (S1).
Then, after the horizontal-drive signal after separating is introduced the critical voltage of machine setting, count (S2) in order to obtain in a frame, having what horizontal-drive signals.
Then, the degree that whether surpasses the scope that machine sets according to the horizontal-drive signal of having counted is judged input pattern (S3).
Then, come to handle (S4) according to the input pattern of judging for the realization picture signal.
But, the input signal distinguishing device of above-mentioned conventional art image display, microprocessor counts discrimination model to the frequency of input signal all the time, if therefore input does not have leeway or need carry out Interrupt Process for counting microprocessor to counting at every turn, therefore existing increases the microprocessor load problem.
The signal identification device of above-mentioned conventional art image display when linking to each other the back recognition mode with TV-set top box, then once took place the picture situation not occur after the 1080i mistake is identified as 480p.
Promptly, if when pattern is used the maneuverable TV-set top box of color bar signal (Bar), then operate for several times each second and keep a few minutes above-mentioned phenomenon takes place to the situation of dozens of minutes, so microprocessor is because of being busy with the detection level frequency number, and produced above-mentioned mistake identification error.
Summary of the invention
The present invention is the input signal distinguishing device and method that image display is provided for the problem that solves above-mentioned existence, purpose be with the level difference of synchronizing signal with 480i, 480p with after 720p, 1080i signal separate, can distinguish the signal of 480p and 1080i from root.
The input signal distinguishing device of image display of the present invention is to be made of following structure: from the picture signal of input, separate the horizontal-drive signal separated part of synchronizing signal; Detection level synchronizing signal separating part from sync signal level come for differentiating the 1st pattern discrimination portion that 480i/480p and 720p/1080i signal are provided with; For distinguishing the 2nd pattern discrimination portion that 480i that the 1st pattern discrimination portion differentiates and 480p signal are provided with; According to the input pattern that the 1st or the 2nd pattern discrimination portion is differentiated, image signals corresponding is treated to the picture signal handling part that can show and be provided with; If imported by the horizontal-drive signal separating part from synchronizing signal, then by the 1st pattern discrimination portion and the 2nd pattern discrimination portion, for exporting control signal by discrimination model, and, after forming image processing in the control image processing part, can on picture, show the microprocessor that is provided with according to differentiating the result.
For achieving the above object, the input signal distinguishing method of image display of the present invention is to be made of the following stage: in the image display with the 1st and the 2nd pattern discrimination portion, from the picture signal of the 1st pattern discrimination portion input, receive the input of horizontal-drive signal, and in the frequency range that machine is set, there is the judgement stage of number of times in judgement is born or positive horizontal-drive signal; There is number of times according to horizontal-drive signal, judges whether input signal is 480i/480p or 720p/1080i signal judgment stage; If be judged as the 480i/480p signal, then distinguish from the 480i of the 2nd pattern discrimination portion input and the differentiation stage of 480p signal.
The above-mentioned horizontal-drive signal of importing in the frequency range that machine is set, if only have negative or positive signal, being judged as so is the 480i/480p signal.
The above-mentioned horizontal-drive signal of importing in the frequency range that machine is set, if negative or positive signal all exists, being judged as so is 720p/1080i.
Above-mentioned differentiation 480i and 480p signal phase are that the output signal according to the 2nd pattern discrimination portion is that high (High) or low (Low) distinguishes signal.
Advantageous effect of the present invention:, therefore can separate 480p signal and 1080i signal from root owing to utilize the level difference of synchronizing signal that 480i, 480p are separated with 720p, 1080i signal; And, prevent from not occur after producing the signal mistake in pattern recognition discerns the situation of picture in advance according to this separation.
And, owing to, therefore minimize the microprocessor load according to count value assurance pattern in microprocessor faster.
Description of drawings
Fig. 1 is the input signal distinguishing device block diagram of conventional art image display.
Fig. 2 is the input signal distinguishing method flow diagram of conventional art image display.
Fig. 3 is the input signal distinguishing device block diagram of image display of the present invention.
Fig. 4 is that the 1st pattern discrimination portion in Fig. 3 constitutes block diagram.
Fig. 5 is that the 2nd pattern discrimination portion in Fig. 3 constitutes block diagram.
Fig. 6 a and 6b are the oscillograms of the expression signal waveform of the signal input part input from Fig. 3.
Fig. 7 is the input signal distinguishing method flow diagram of image display of the present invention.
To accompanying drawing major part symbol description:
10: signal input part; 20: the horizontal-drive signal separated part; 100: the 1 pattern discrimination portions; 101: switching part; 102: the horizontal synchronization identification part; 103: count section; 200: the 2 pattern discrimination portions; 201: one-shot multivibrator; 40: switching part; 50: the picture signal handling part; 60: display part.
Embodiment
Below, with reference to accompanying drawing, the input signal distinguishing device and method of image display of the present invention is done following explanation.
Fig. 3 is the input signal distinguishing device block diagram of image display of the present invention; Fig. 4 is that the 1st pattern discrimination portion in Fig. 3 constitutes block diagram; Fig. 5 is that the 2nd pattern discrimination portion in Fig. 3 constitutes block diagram; Fig. 6 is the oscillogram that is input to the expression signal waveform of horizontal synchronization separated part among Fig. 3; Fig. 7 is the input signal distinguishing method flow diagram of image display of the present invention.
The input signal distinguishing device of image display of the present invention is to be made of following structure as shown in Figure 3: for reception has the signal input part 10 that the picture signal input of diversified signal mode is provided with; By in the signal of signal input part 10 inputs, isolate the horizontal-drive signal separated part 20 of horizontal-drive signal; The horizontal-drive signal that the horizontal-drive signal separated part 20 that receives is separated is imported, and in the picture signal that receives, for differentiating the 1st pattern discrimination portion 100 that 480i/480p and 720p/1080i signal are provided with; If the signal of differentiating in the 1st pattern discrimination portion 100 is the 480i/480p signal, then receive behind the signal of horizontal-drive signal separated part 20 inputs, for dividing into the 2nd pattern discrimination portion 200 that 480i and 480p signal are provided with separately; According to the judged result of the 1st pattern discrimination portion 100 and the 2nd pattern discrimination portion 200,, be the switching part 40 that the processing that differs from one another is switched by the picture signal of signal input part 10 input; Input signal according to the 1st pattern discrimination portion 100 or the 2nd pattern discrimination portion 200 are differentiated can show for making image signals corresponding, by the switching of switching part 40, and the picture signal handling part of handling in the mode that differs from one another 50; If imported the synchronizing signal of separating by horizontal-drive signal separated part 20, then by the 1st pattern discrimination portion 100 and the 2nd pattern discrimination portion 200, for exporting control signal by discrimination model, and according to differentiating the result, after in picture signal handling part 50, forming image processing, in order on picture, to show and to control and the microprocessor 300 that is provided with; According to the control signal of microprocessor 300, for showing the display part 60 that is provided with from the picture signal of picture signal handling part 50 outputs.
The 1st pattern discrimination portion 100 is to be made of following structure as shown in Figure 4: if imported signal from horizontal-drive signal separated part 20, and then according to the control signal of microprocessor 300, the switching part 101 that switches; Receive switching part 101 output valves and judge whether to be the horizontal synchronization identification part 102 of (Positive) or negative (Negative) just; By the horizontal-drive signal of horizontal synchronization identification part 102 identifications, in the frequency range that machine is set, for calculating the just count section 103 that exists number of times to count of (Positive) or negative (Negative); Count value in count section 103 behind the counting feeds back to the phase-locked loop (PLL) of switching part 101.
The 2nd pattern discrimination portion 200 as shown in Figure 5, be to constitute: according to the differentiation result of the 1st pattern discrimination portion 100 by following structure, receive the control signal of microprocessor 300, after the input by horizontal-drive signal separated part 20 reception 480i or 480p picture signal, the one-shot multivibrator 201 of high (High)/low (Low) signal of output; After 201 outputs are connected according to one-shot multivibrator, pass the signal to the transistor Q1 of microprocessor 300 etc.
Input signal distinguishing device action to the invention described above image display is described as follows:
Horizontal-drive signal separated part 20, by in the signal of signal input part 10 inputs, isolate horizontal-drive signal, and the 1st pattern discrimination portion 100 that the signal that receives separation is imported is with the horizontal-drive signal of importing, in the certain frequency scope that machine is set, judge 480i/480p and 720p/1080i signal according to the number of times of negative (Negative) or the just waveform existence of (Positive).
At this moment, each frequency characteristic of signal by signal input part 10 inputs is as follows.
Table 1
| Pattern | Horizontal frequency | Vertical | Pixel clock | |
| 480i(720×480) | 15.75kHz | ?60Hz | ?27MHz | |
| 480p(728×480) | 31kHz | ?60Hz | ?27MHz | |
| 720p(1280×720) | 45kHz | ?60Hz | ? | |
| 1080i(1920×1080) | 33.7kHz | ?60Hz | ?74MHz |
That is, as shown in Fig. 6 a and 6b, can know that 480i/480p is identical waveform, know that also 720p/1080i is identical waveform.
And microprocessor 300 is according to the number of times by count section 103 countings, judges that whether input signal still is the 720p/1080i signal for the 480i/480p signal.That is, the 480i/480p signal be between the machine setting district in, negative (Negative) or just the waveform of (Positive) only exist once; Also can know the 720p/1080i signal be between the machine setting district in, negative (Negative) or just the waveform of (Positive) all exist.
Therefore, if the detection of the number of times of counting is 1 in count section 103, be judged as the 480i/480p signal so; If detecting is 2, be judged as the 720p/1080i signal so.
If in the 1st pattern discrimination portion 100, be judged as the 480i/480p picture signal, the signal that separates by horizontal-drive signal separated part 20 then, be input to the one-shot multivibrator 201 of the 2nd pattern discrimination portion 200 after, produce high (High)/low (Low) signal; And microprocessor 300 receives this high-low signal, and the picture signal of differentiation input in detail is 480i signal or 480p signal.
And microprocessor 300 is the situation of high (High) or low (Low) according to the signal from 200 inputs of the 2nd pattern discrimination portion, can correctly hold 480i signal or 480p signal.
To the input signal distinguishing method of above-mentioned image display, do following explanation with reference to Fig. 5.At first, from the picture signal of input, isolate horizontal-drive signal (S11).
Judge whether the synchronizing signal of separating exists (S12) in voltage level (0V) upper end that machine is set.
Then, judge whether the synchronizing signal that detects exists (S13) in the frequency range that machine is set.
Then, above-mentioned judged result (S13), if the horizontal-drive signal that detects exists in the frequency range that machine is set, then be identified as the corresponding synchronous signal after, count (S14-S15).
Then, above-mentioned judged result (S13) if do not exist or discerned 1 time with the corresponding synchronous signal, then detects whether have (S16) in the voltage level lower end that machine is set in the frequency range that machine is set.
Then, judge whether the synchronizing signal that detects exists (S17) in the frequency range that machine is set.
Judged result (S17) if exist, then is identified as the lower end synchronizing signal in the frequency range that machine is set, and counts (S18-S19).
Then, according to count value judge whether into the 480i/480p signal still be 720p/1080i signal (S20).
That is,, then be identified as the 480i/480p signal if count value is 1; Then, from the horizontal synchronization separating part from signal, distinguishing again again by the 2nd pattern discrimination portion is 480i signal or 480p signal (S21-S22).
Then, according to the pattern of above-mentioned differentiation, carry out on picture, showing after the image processing (S23).
On the other hand,, then be identified as the 720p/1080i signal, and carry out on picture, showing after the corresponding image processing (S25-S26) according to recognized patterns if the said counting value is 2.
Then, if the input power off command then finishes whole routines (S24).
As above-mentioned, the input signal distinguishing method of image display of the present invention, if imported horizontal-drive signal, then microprocessor 300 outputs to the switching part 101 of the 1st pattern discrimination portion 100 with switching command, and judges on the machine setting voltage level in horizontal synchronization identification part 102 and whether the lower end detects synchronizing signal according to this order.
And if the synchronizing signal of detecting, then horizontal synchronization identification part 102 is to the microprocessor output signal; If do not detect synchronizing signal, output signal not then.And, in count section 103,, judge input signal according to negative (Negative) or the identification number of times of (Positive) just.
Then, according to the differentiation result of the 1st pattern discrimination portion 100, being the 480i/480p signal if differentiate, still is the 480p signal for distinguishing the 480i signal then, judges again by the 2nd pattern discrimination portion 200.
Claims (8)
1, the input signal distinguishing device of image display is characterized in that it being to be made of following structure:
The horizontal-drive signal separated part of from the picture signal of input, separating synchronizing signal;
Detection level synchronizing signal separating part from sync signal level come for differentiating the 1st pattern discrimination portion that 480i/480p signal and 720p/1080i signal are provided with;
For distinguishing the 2nd pattern discrimination portion that 480i signal that the 1st pattern discrimination portion differentiates and 480p signal are provided with;
According to the input pattern that the 1st or the 2nd pattern discrimination portion is differentiated, image signals corresponding is treated to the picture signal handling part that can show and be provided with;
If imported by the horizontal-drive signal separating part from synchronizing signal, then by the 1st pattern discrimination portion and the 2nd pattern discrimination portion, for exporting control signal by discrimination model, and according to differentiating the result, after forming image processing in the control image processing part, can on picture, show and little handling part of being provided with.
2, the input signal distinguishing device of image display according to claim 1, the 1st pattern discrimination portion that it is characterized in that is made of following structure:
The switching part that switches according to microprocessor control signal;
According to the switch instances of switching part, receive the input of unlike signal each other, and identification corresponding horizontal synchronizing signal is the horizontal synchronization identification part for negative wave or positive waveform;
The count section that the recognition result of horizontal-drive signal is counted.
3, the input signal distinguishing device of image display according to claim 2 is characterized in that above-mentioned switching part is according to microprocessor control signal, with the contact switching that hockets.
4, the input signal distinguishing device of image display according to claim 2 is characterized in that also comprising following structure: after the 1st pattern discrimination portion counts in count section, can involution to the phase-locked loop of switching part.
5, the input signal distinguishing method of image display is characterized in that the input signal distinguishing method at the image display with the 1st and the 2nd pattern discrimination portion is to be made of the following stage:
From the picture signal of the 1st pattern discrimination portion input, receive the input of horizontal-drive signal, and in the frequency range that machine is set, there is the judgement stage of number of times in the horizontal-drive signal of judgement negative or positive;
There is number of times according to synchronizing signal, judges whether input signal is 480i/480p signal or 720p/1080i signal judgment stage; Then,
If be judged as the 480i/480p signal, then distinguish from the 480i signal of the 2nd pattern discrimination portion input and the differentiation stage of 480p signal.
6, the input signal distinguishing method of image display according to claim 5 is characterized in that the horizontal-drive signal imported if only have negative or positive signal, being judged as the 480i/480p signal so in the scope that machine is set.
7, the input signal distinguishing method of image display according to claim 5 is characterized in that the horizontal-drive signal imported in the scope of having set, if negative or positive signal all exists, be judged as the 720p/1080i signal so.
8, the input signal distinguishing method of image display according to claim 5, the output signal that it is characterized in that distinguishing 480i and 480p signal phase and be according to the 2nd pattern discrimination portion is the high or low signal of distinguishing.
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| CNB2004100502659A CN100373918C (en) | 2004-08-18 | 2004-08-18 | Input signal discriminating device and method for image display equipment |
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| CNB2004100502659A CN100373918C (en) | 2004-08-18 | 2004-08-18 | Input signal discriminating device and method for image display equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442651B (en) * | 2007-11-21 | 2011-04-20 | 陞泰科技股份有限公司 | Video signal system, image transmission device, video signal receiving device and control method thereof |
| US8208071B2 (en) | 2007-07-25 | 2012-06-26 | Samsung Electronics Co., Ltd. | Method for determining the aspect ratio and an image apparatus using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10262197A (en) * | 1997-03-17 | 1998-09-29 | Fujitsu Ltd | Method for detecting pedestal level, its circuit and television device |
| JP2001215937A (en) * | 2000-02-02 | 2001-08-10 | Denso Corp | Video signal processor |
| CN1234240C (en) * | 2002-12-10 | 2005-12-28 | 乐金电子（沈阳）有限公司 | Automatic judgement method of display input mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8208071B2 (en) | 2007-07-25 | 2012-06-26 | Samsung Electronics Co., Ltd. | Method for determining the aspect ratio and an image apparatus using the same |
| CN101442651B (en) * | 2007-11-21 | 2011-04-20 | 陞泰科技股份有限公司 | Video signal system, image transmission device, video signal receiving device and control method thereof |
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