CN1681311A - Method for outputting signals beyond range of inputs by synchronous signal oritation coupling - Google Patents
Method for outputting signals beyond range of inputs by synchronous signal oritation coupling Download PDFInfo
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- CN1681311A CN1681311A CN 200410021257 CN200410021257A CN1681311A CN 1681311 A CN1681311 A CN 1681311A CN 200410021257 CN200410021257 CN 200410021257 CN 200410021257 A CN200410021257 A CN 200410021257A CN 1681311 A CN1681311 A CN 1681311A
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Abstract
The method includes following steps: it is decided if the processor of displaying device receives image signal; at the stage of checking vertical and horizontal synchronizing signal in inputted image signal, it is decided if the inputted vertical synchronizing frequency is up to max inputted vertical synchronizing frequency, or at the range of N time of max inputted vertical synchronizing frequency; if yes, the directional couple of inputted vertical synchronizing frequency is set at 1/N; checks the vertical synchronizing frequency and directional couple vertical synchronizing frequency, the set vertical synchronizing frequency is transformed into directional couple vertical synchronizing frequency; the transformed vertical synchronizing frequency and the horizontal synchronizing frequency are used to set resolution and refreshing rate that is used to output image signal.
Description
Technical field
The present invention aims to provide a kind of method of effectively exporting the signal that exceeds the input signal allowed band by the synchronizing signal directional couple.The signal processing of display unit particularly, when it receives the signal of video signal that can not discern---when exceeding the signal of input signal allowed band, will be by the directional couple of vertical synchronizing signal, (Out of Range) and the signal of video signal that can not show outside the input range are presented on the picture, thereby make display unit can receive the signal of video signal that can not show, meanwhile can also need not to connect under the state of other playing device, show input signal allowed band signal in addition by the synchronizing signal directional couple.The signal of video signal processing procedure of display unit is by analog/digital (A/D) converter the analog image signal processing of input to be become digital signal, exports according to the output standard then.
Background technology
Traditional display unit is when handling these signal of video signal, be by conversion picture ratio (FRC:Frame Rate Convertion), convert national television systems committee's form (NTSC) to broadcast format (PAL) vertical frequency, convert film format (Film Mode) to picture format (GraphicMode) vertical frequency (Vertical Frequency), and then show.Can reduce scintillation (Fliker) by this method.Utilize this function, can also carry out directional couple, also can show transition frequency vertical synchronizing signal (Vertical Synchronous Signal).Below, describe conversion (FRC) process of general picture ratio in detail with reference to figure 1:
At this, adopt film format to carry out the example explanation, each picture in the film format source that is made of 24Hz needs 1/24 second.In the time will being shown as 60Hz (60 picture) to this format sources, the film source of 2 pictures need be converted into 5 pictures.This just means that the 2 picture format sources that are stored on the memory should adopt EVEN (even number), ODD (odd number), EVEN, ODD, EVEN ... mode convert 5 pictures output to.
Because the signal of this conversion is interlacing (Interlace) signal, so 1 picture output EVEN, the separation of ODD (Deinterlacing) process will convert to carries out (Progressive) signal, passes through signal processing again---filter (Filtering), on/arrange (Up/Down Scaling) down just can export afterwards according to standard (Output Format).
That is to say, use EVEN, ODD, EVEN, ODD, EVEN ... after formal argument becomes the Signal Separation of picture ratio, 2 times the mode of exporting is all adopted in signal output separately.This is that a kind of conversion by picture (Frame Converting) process changes update time (Refresh Time), and realizing reducing scintillation and NTSC format conversion is the method for PAL form,
On the other hand, the signal processing of the display unit basic handling order of calibrating at input signal is as follows:
At first, the data of check input when checking signal, first insolation level/vertical synchronizing signal parameter, and by with itself and the process that the horizontal/vertical synchronization signals of having set compares, come discernible signal that no change is arranged.Under this state, if the signal variation, will be according to the output standard, set by horizontal-drive signal and vertical synchronizing signal and to upgrade ratio and resolution.
But when the scaler of signal processing did not detect synchronizing signal, system can show this operation information picture of " super scope " (OUT OF RANGE) all the time.
That is, when signal processing received the signal that exceeds display unit permission input range and can not discern, display unit can not be got back to original show state after going beyond the scope.So, exceed the display unit of importing allowed band for connecting to receive separately, and must be transformed into format setting state in the past, exist inconvenience.In order to solve this inconvenience, can utilize top said picture rate conversion (FRC) function, but the scope that this function is supported is quite limited.The main purpose of picture ratio changing (FRC) is to remove flicker, this shows, there is the problem that does not match with the purpose that will realize in this function.
Summary of the invention
Purpose of the present invention is exactly for addressing the above problem, a kind of method of utilizing the output of synchronizing signal directional couple to exceed the signal of input signal allowed band is provided, when the signal processing of display unit receives the signal of video signal that can not discern---when exceeding the signal of input range, can be by the directional couple of vertical synchronizing signal, the signal of video signal that can not show that goes beyond the scope is presented on the picture, thereby makes display unit can receive the signal of video signal that can not show.At this moment, we need not to connect other playing device again.
In order to achieve the above object, the synchronizing signal directional couple that is adopted allows output to exceed the input signal of input range, and its concrete grammar mainly comprises following several stages:
Whether the display unit signal processing of handling input R/G/B signal of video signal has received the stage that signal of video signal is tested; In the signal of video signal of input, detect the stage of vertical/horizontal synchronizing signal; Whether the vertical synchronizing frequency of input reaches maximum input vertical synchronizing frequency, or has not been positioned at the judgement stage within N times of scope of maximum input vertical synchronizing frequency; When the vertical synchronizing frequency of input exceeds the scope of maximum input vertical synchronizing frequency and N times of maximum input vertical synchronizing frequency, input vertical synchronizing frequency directional couple is set at the 1/N stage; Confirm to have set vertical synchronizing frequency and directional couple vertical synchronizing frequency, the vertical synchronizing frequency of having set is transformed into the directional couple vertical synchronizing frequency stage; Adopt the vertical synchronizing frequency of conversion and the horizontal sync frequencies of input to set resolution and refresh rate stage; Come the output image signal stage with resolution/refresh rate of having set.
Good effect of the present invention: the present invention receives the signal of video signal that can not discern when the signal processing of display unit---when exceeding the signal of importing allowed band, can be by the directional couple of vertical synchronizing signal, demonstrating (Out of Range) and signal of video signal that can not show beyond the scope of being positioned on the picture, must connect the trouble of display unit separately thereby eliminated to restoring the unsupported signal of video signal of display unit.In addition, as traditional display unit, also has the advantage that the ratio (FRC) that need not the conversion picture can show input allowed band signal of video signal in addition easily.
Description of drawings
Fig. 1 is the schematic diagram that shows general picture rate of change process.
Fig. 2 is the flow chart that shows the interim state of the present invention
Embodiment
Below, we are with reference to accompanying drawing, specify the present invention and export by the synchronizing signal directional couple and exceed the Signal Processing process of importing allowed band.Before specifying, the vertical synchronizing signal of exceeding of learning about that display unit receives importing allowed band and the characteristic of horizontal-drive signal.
At first learn about vertical synchronizing signal.When input tolerance frequency maximum is the display unit of 85Hz when receiving the vertical synchronizing signal that exceeds allowed band, can lose vertical synchronizing signal because of loss signal sensing point (DetectPoint), can only detect 1 once in a while this moment---2 points.This situation just means the continuous flow of picture owing to dropout, and makes us under this picture show state, can't with the naked eye see picture.And the vertical synchronizing signal directional couple that adopts by the present invention, people just can with the naked eye see these pictures.
As a reference, when the aligning part of signal processing does not detect synchronizing signal, showing ' the operation system information picture of OUT OF RANGE ' all the time.
Learn about horizontal-drive signal below.When input tolerance frequency maximum is the display unit of 85Hz when having received horizontal-drive signal, the high more easy more sensing point (Detect Point) that searches of synchronizing frequency.So, do not need to take the measure except that directional couple or classification measures such as (Sorting).Compare with the synchronizing signal of minority, when importing the horizontal-drive signal of greater number, form accurately easily all the better and survey.Therefore, for horizontal-drive signal, both made and imported when exceeding the signal of input beyond the allowed band, also do not needed to carry out special signal processing.Given this, the present invention has got rid of the processing to horizontal-drive signal.
Below, at directional couple, exceed the processing procedure that the signal beyond the allowed band exports with regard to input and describe in detail by synchronizing signal.
At first, when the signal processing (not giving expression on the drawing) of display unit when receiving the R/G/B signal of video signal, signal processing at first will be checked the signal of video signal S200 that is received, and checks the vertical/horizontal synchronizing signal S210 of signal of video signal again.Then, judge whether the present vertical synchronizing frequency that receives (for example: 85Hz) import within the scope (85Hz * 2) of vertical synchronizing frequency 2 multiples with maximum imports vertical synchronizing frequency in the maximum of display unit.The result who carries out above-mentioned judgement is, when judged result exceeds maximum input vertical synchronizing frequency (85Hz) or exceeds 2 times of scopes of maximum perpendicular synchronizing frequency (85Hz * 2) for the vertical synchronizing frequency that receives, be the vertical synchronizing frequency directional couple that receives 1/2 frequency S230.
So, after the vertical synchronizing frequency directional couple that receives is 1/2, just can detect vertical synchronizing signal.
In above-mentioned steps, after the vertical synchronizing frequency directional couple becomes 1/2 frequency, signal processing compares the vertical synchronizing frequency of directional couple with the vertical synchronizing frequency S240 that has set, more original vertical synchronizing frequency is for conversion into the vertical synchronizing frequency S250 of directional couple.
Usually, the ratio of vertical synchronizing signal decision resolution, the ratio that the horizontal-drive signal decision is upgraded.So, set resolution and upgrade ratio S260 by the vertical synchronizing frequency of conversion and the horizontal sync frequencies of input.
Through above-described processing procedure, when the resolution of setting display unit and renewal ratio, just can be according to the resolution/renewal ratio output image signal S270 of new settings.
On the other hand, when the vertical synchronizing frequency that is received (for example: in the time of 85Hz) and within the scope (85Hz * 2) of maximum input vertical synchronizing frequency 2 multiples, need not be for conversion into the synchronizing frequency S250 of input by the vertical synchronizing frequency that the directional couple process can will have been set is included in maximum input vertical synchronizing frequency.
Therefore, in the time will being transformed into the vertical synchronizing frequency of the resolution of originally having imported (Resolution), setting resolution and upgrade ratio S260 according to the vertical synchronizing frequency of conversion and the synchronizing frequency of input.
Identical therewith, when having set resolution and having upgraded ratio, use the resolution/renewal ratio of new settings to display unit output image signal 270.
Claims (2)
1, a kind ofly export the method that exceeds the input range signal, it is characterized in that comprising following several stages by the synchronizing signal directional couple:
Whether the display unit signal processing of handling input R/G/B signal of video signal has received the stage that signal of video signal is tested;
In the signal of video signal of input, detect the stage of vertical/horizontal synchronizing signal;
Whether the vertical synchronizing frequency of input reaches maximum input vertical synchronizing frequency, or has not been positioned at the judgement stage within N times of scope of maximum input vertical synchronizing frequency;
When the vertical synchronizing frequency of input exceeds the scope of maximum input vertical synchronizing frequency and N times of maximum input vertical synchronizing frequency, input vertical synchronizing frequency directional couple is set at the 1/N stage;
Confirm to have set vertical synchronizing frequency and directional couple vertical synchronizing frequency, the vertical synchronizing frequency of having set is transformed into the directional couple vertical synchronizing frequency stage;
Adopt the vertical synchronizing frequency of conversion and the horizontal sync frequencies of input to set resolution and refresh rate stage;
Come the output image signal stage with resolution/refresh rate of having set.
2, according to claim 1ly export the method that exceeds the input range signal, it is characterized in that: in the 1/N process of the N multiple of maximum input vertical synchronizing frequency and directional couple multiple, the N value is set at N=2 by the synchronizing signal directional couple.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410021257 CN1681311A (en) | 2004-04-09 | 2004-04-09 | Method for outputting signals beyond range of inputs by synchronous signal oritation coupling |
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| CN 200410021257 CN1681311A (en) | 2004-04-09 | 2004-04-09 | Method for outputting signals beyond range of inputs by synchronous signal oritation coupling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032682A (en) * | 2012-12-25 | 2013-04-10 | 北京化工大学 | Abnormal signal orientation method in pipeline |
| CN105681720A (en) * | 2016-03-18 | 2016-06-15 | 青岛海信电器股份有限公司 | Video playing processing method and device |
| CN105867755A (en) * | 2015-11-06 | 2016-08-17 | 乐视移动智能信息技术（北京）有限公司 | Method for improving fluency of picture and terminal device |
-
2004
- 2004-04-09 CN CN 200410021257 patent/CN1681311A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032682A (en) * | 2012-12-25 | 2013-04-10 | 北京化工大学 | Abnormal signal orientation method in pipeline |
| CN103032682B (en) * | 2012-12-25 | 2014-08-20 | 北京化工大学 | Abnormal signal orientation method in pipeline |
| CN105867755A (en) * | 2015-11-06 | 2016-08-17 | 乐视移动智能信息技术（北京）有限公司 | Method for improving fluency of picture and terminal device |
| CN105681720A (en) * | 2016-03-18 | 2016-06-15 | 青岛海信电器股份有限公司 | Video playing processing method and device |
| CN105681720B (en) * | 2016-03-18 | 2019-04-16 | 青岛海信电器股份有限公司 | The processing method and processing device of video playing |
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