CN101290764A - Phase correcting method and device for display signal - Google Patents
Phase correcting method and device for display signal Download PDFInfo
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- CN101290764A CN101290764A CNA2007100141917A CN200710014191A CN101290764A CN 101290764 A CN101290764 A CN 101290764A CN A2007100141917 A CNA2007100141917 A CN A2007100141917A CN 200710014191 A CN200710014191 A CN 200710014191A CN 101290764 A CN101290764 A CN 101290764A
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Abstract
The invention discloses a method for the phase correction of a display signal. The method comprises the following steps that: (a) a to-be-corrected display signal parameter is received; (b) whether the synchronous polarity parameter of the to-be-corrected signal is matching polarity is judged; if the judgment is yes, the correction process is stopped; (c) when the synchronous polarity parameter is not matching polarity, the sum of the synchronous width parameter of the to-be-corrected display signal and a synchronous after edge width parameter is set as a synchronous after edge width parameter; (d) the corrected synchronous after edge width parameter is taken as a correction parameter and is set as a display parameter. The method can correct the offsetting or deletion phenomena of image display position caused by certain difference between the signal generated by a signal source and a standard signal, and can avoid the trouble of a user caused by manual adjustment at the same time. Meanwhile, the invention also discloses a device for the phase correction of a display signal.
Description
Technical field
The invention belongs to technical field of image processing, be specifically related to method for correcting phase and device in a kind of image processing field.
Background technology
In daily life work or other occasion, we sometimes can find the shown picture position of display device not at the middle position of the display screen of display device, and the skew of certain distance is arranged; Perhaps, can find also that sometimes the phenomenon of disappearance appears in the shown image of display screen of display device.This be because, the signal source of the shows signal that display device received is varied, and these signal sources may be from many different producers, because each producer's difference, just caused its production signal source signal format all more or less exist gap with normal structure specified standard signal, the situation that just can occur the skew of image display position when therefore, there is the shows signal of certain gap in the display device of the standard signal format that receives these and standard in this case.
Give an example, at present, support that the display of VGA form is more and more, support that the signal source of VGA form is also more and more, such as common DVD player etc.Because each signal source manufacturer difference, the scheme that is adopted also can be different, such as the synchronous polarity of signal, the back is along width etc. synchronously, this has just caused VGA signal and off-gauge VGA signal of poor quality's signal source output, and VESA (VideoElectronics Standards Association, VESA) the specified standard signal is not inconsistent, and then causes the display device of standard problems such as picture position skew or disappearance to occur.
In the prior art, solution to this problem is to be provided with special adjusting button or button etc. at display device, and when showing picture position skew or deficient phenomena, the user just regulates to reach the normal effect that shows of image by this button or button.Obviously, if lose time to reach normal demonstration by the manual experimental adjustment repeatedly of user, operating process also is quite loaded down with trivial details.
Therefore, demand occurring a kind of new shows signal method for correcting phase and device thereof urgently.
Summary of the invention
The object of the present invention is to provide a kind of can be to some because skew appears in the display image that the quality problems of signal source cause or deficient phenomena is proofreaied and correct, and can avoid the loaded down with trivial details method and the corresponding device thereof of user's manual correction.
In order to address the above problem, the present invention proposes a kind of shows signal method for correcting phase, may further comprise the steps:
A, reception shows signal parameter to be corrected comprise that at least synchronous width parameter, synchronous back are along width parameter and synchronous polarity parameter;
B, judge that whether the synchronous polarity parameter of this signal to be corrected is coupling polarity; If not then the synchronous width parameter of described shows signal to be corrected is set to synchronous back along width parameter with synchronous back along the width parameter sum;
Synchronous back after c, the described correction is set to the actual displayed parameter along width parameter as correction parameter;
Wherein, described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, coupling polarity was negative polarity; When display device regulation negative edge triggered reference position identification, coupling polarity was positive polarity.
Further, between described step b and step c, perhaps after the step c, also comprise steps d: store the shows signal parameter and the correction parameter thereof that receive among the described step a.
Further again, between described step a and step b, also include following steps:
A1, if the synchronous polarity parameter of described signal to be corrected is a coupling polarity, then finish the correction process, and described shows signal parameter to be corrected is set to the actual displayed parameter;
A2, according to the comparison of the corresponding parameter of the shows signal to be corrected that receives among the shows signal parameter of storing in the described steps d and the step a, judge described shows signal to be corrected whether with the shows signal of previous storage from same signal source, if, then directly the correction parameter of the previous shows signal of described storage is set to the actual displayed parameter, if not, execution in step b then.
Further again, when the record number of the shows signal parameter of described storage and correction parameter thereof reaches predetermined value, then cover previous shows signal parameter and correction parameter thereof with new shows signal parameter and correction parameter thereof.
Preferably, described shows signal is the VGA signal.
Correspondingly, the present invention also provides a kind of shows signal phase correction unit, comprising:
Receiving element is used to receive shows signal parameter to be corrected;
Comparing unit is used to judge whether the synchronous polarity parameter of described signal to be corrected is coupling polarity, if then finish the correction process; Otherwise, enter processing unit;
Processing unit, when described synchronous polarity is not the coupling polarity chron, the synchronous width parameter that is used for described shows signal to be corrected and back synchronously are set to synchronously the back along width parameter along the width parameter sum;
Output unit is used for the synchronous back after the correction of described processing unit output along width parameter as correction parameter and be set to the actual displayed parameter;
Wherein, described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, coupling polarity was negative polarity; When display device regulation negative edge triggered reference position identification, coupling polarity was positive polarity.
Further, described shows signal phase correction unit also comprises:
Storage unit is used for storing shows signal parameter and the correction parameter thereof that receiving element receives;
Recognition unit, be used for comparison according to shows signal parameter with the corresponding parameter of the shows signal to be corrected of receiving element reception of described cell stores, judge that whether described shows signal to be corrected is same signal source with previous shows signal, if then directly the correction parameter of the described previous shows signal of cell stores is set to the actual displayed parameter; If not, then export described comparing unit to.
A nearlyer step, the shows signal parameter to be corrected that described receiving element receives comprises that at least synchronous width parameter, synchronous back are along width parameter and synchronous polarity parameter.
Preferably, described shows signal is the VGA signal.
Adopt the present invention can realize that to because the skew of the image display position that some difference of the signal that signal source produces and standard signal causes or the correction of deficient phenomena, the while can be avoided the loaded down with trivial details of user's manual adjustment.
Description of drawings
Fig. 1 is the functional block diagram of an embodiment of shows signal phase correction unit among the present invention;
Fig. 2 is the functional block diagram of another embodiment of shows signal phase correction unit among the present invention;
Fig. 3 is based on the process flow diagram of an embodiment of the shows signal method for correcting phase that Fig. 1 means for correcting proposed;
Fig. 4 is based on the process flow diagram of another embodiment of the shows signal method for correcting phase that Fig. 2 means for correcting proposed.
Embodiment
With reference to figure 1, illustrate the functional structure of an embodiment of a kind of shows signal phase correction unit of the present invention.As shown in the figure, shows signal phase correction unit 1 comprises:
Receiving element 11 is used to receive shows signal parameter to be corrected; Wherein, the vision signal that described shows signal parameter to be corrected can be VGA signal or other appropriate formats, described shows signal be from signal source, for example DVD player, PC etc.; In addition, described shows signal parameter to be corrected comprises that at least synchronous width parameter, synchronous back are along width parameter, synchronous polarity parameter, can also comprise effective width parameter, overall width parameter and forward position parameter etc. synchronously, these parameters can be the correlation parameter of capable signal of described shows signal to be corrected or the correlation parameter of field signal.
Comparing unit 12 is used to judge whether the synchronous polarity parameter of described signal to be corrected is coupling polarity, if, then finishing the correction process, described shows signal parameter to be corrected is set to the actual displayed parameter; If not, then enter processing unit 13.Wherein, described coupling polarity is meant that when display device regulation rising edge triggered reference position identification, described coupling polarity parameter was a negative polarity; Discern when display device regulation negative edge triggers reference position, this moment, described coupling polarity was positive polarity.
To export in the video display process chip of display device by the actual displayed parameter that described phase correction unit 1 produces, and then the control display device carries out the image demonstration according to the parameter after proofreading and correct.
With reference to figure 2, illustrate the functional structure of another embodiment of a kind of shows signal phase correction unit of the present invention.As shown in the figure, shows signal phase correction unit 2 comprises:
Receiving element 21 is used to receive shows signal parameter to be corrected; Wherein, the vision signal that described shows signal parameter to be corrected can be VGA signal or other appropriate formats, described shows signal be from signal source, for example DVD player, PC etc.; In addition, described shows signal parameter to be corrected comprises that at least synchronous width parameter, synchronous back are along width parameter, synchronous polarity parameter, can also comprise effective width parameter, overall width parameter and forward position parameter etc. synchronously, these parameters can be the correlation parameter of capable signal of described shows signal to be corrected or the correlation parameter of field signal.
Comparing unit 23 is used to judge whether the synchronous polarity parameter of the signal to be corrected that receiving element 21 receives is coupling polarity, if, then finishing the correction process, described shows signal parameter to be corrected is set to the actual displayed parameter; If not, then enter processing unit 24.Wherein, described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, this moment, described coupling polarity parameter was a negative polarity; Discern when display device regulation negative edge triggers reference position, this moment, described coupling polarity was positive polarity.
In addition, when storage unit 25 storage data reach predetermined value, then cover previous shows signal parameter and correction parameter thereof with new shows signal parameter and correction parameter thereof.Described previous shows signal parameter that need to cover and correction parameter thereof can be after according to time sequence the earliest or the display parameter and the correction parameter thereof of storage early.Certainly, described previous shows signal parameter and the correction parameter thereof that need to cover also can be to judge according to frequency of utilization, promptly uses minimum or less previous shows signal parameter of frequency and correction parameter thereof to be to need to cover; Here can be to access times field of recording setting of each previous shows signal parameter and correction parameter thereof, the access times of this record that adds up judge with convenient whether this record is the described record that needs covering.Wherein, described predetermined value can be the maximal value of memory capacity, also can be a predefined dominant record numerical value, and this value can be stored in this storage unit 25, just the record number that will store when at every turn increasing new stored record and this value compare, to judge whether to reach maximal value.
Need to prove that described record is meant the one group of shows signal parameter and the correction parameter thereof of storage.
With reference to figure 3, illustrate the workflow of an embodiment of the shows signal method for correcting phase that is proposed based on Fig. 1 means for correcting 1.As shown in the figure, may further comprise the steps:
Synchronous back after proofreading and correct in the step 34, step 33 is along being set to the actual displayed parameter except that synchronous back remaining parameter along width parameter in the shows signal parameter that receives in width parameter and the step 31.Setting up procedure mainly by parameter after the described correction and remaining parameter are sent in the video display process chip, shows control by video display process chip herein.
With reference to figure 4, illustrate the workflow of another embodiment of the shows signal method for correcting phase that is proposed based on Fig. 2 means for correcting 2.As shown in the figure, may further comprise the steps:
Whether step 42, determining step 41 shows signal that receives from same signal source, if then execution in step 43, otherwise, execution in step 45.Here, judge whether from the contrast of same signal source to as if the parameter of previous previous shows signal of being preserved when carrying out the shows signal phase correction, this parameter is stored in the storage unit 25 in the means for correcting 2; The shows signal parameter of described storage promptly is the shows signal parameter that is received in the previous step 41; Described determination methods can only be whether the shows signal parameter of judging in this step 21 to be received all equates with the value of the corresponding parameter of the previous shows signal parameter of storage, if equate, then think from same signal source, otherwise, think from different signal sources.Certainly, judging whether here is that the method for same signal source is not unique, for example can also be whether the shows signal parameter judging in this step 21 to be received is all approximate with the value of the corresponding parameter of the previous shows signal parameter of storage, approximate herein this sub-value that is meant described corresponding parameter and toward sub-value whether all in same scope, if then think to be similar to, and then think from same signal source, otherwise cannot not think approximately, and then think and be not from same signal source.For example, be example with the field sync signal width, if the value of this parameter of this reception is 3.813 microseconds, previous this parameter value of storage is 3.751 microseconds, supposes that default scope is the 3.7-3.9 microsecond, then thinks to be similar this moment.Thus, we can adopt equal fully or approximate or the mode of both combinations judges whether from same signal source, and for example, the value of a part of corresponding parameter equates, and the respective value of the parameter of remaining part is close, then thinks it also is from same signal source.Because those skilled in the art can simply draw its detailed process by the foregoing description reasoning, therefore no longer describe in detail.In addition, said here preset value can be stored in the ROM (read-only memory), just can read this value after powering up at every turn; Described preset value also can be stored in the electricity erasable memorizer, can read after powering up, and also can change this preset value by specific function in operational process.Because this all is those skilled in the art's conventional techniques, therefore no longer more specifically describe.
Whether the synchronous polarity parameter that step 45, determining step 41 receive shows signal to be corrected is coupling polarity, if then execution in step 49, otherwise, execution in step 46.Description for coupling polarity can be described with reference to step 32 in embodiment illustrated in fig. 3.
Synchronous back after proofreading and correct in the step 47, step 46 is along being set to the actual displayed parameter except that synchronous back remaining parameter along width parameter in the shows signal parameter to be corrected that receives in width parameter and the step 41.Setting up procedure mainly by the parameter of the synchronous back after the described correction along width parameter and former remainder is sent in the video display process chip, shows control by video display process chip herein.
It should be noted that, in this step with described shows signal parameter to be corrected and correction parameter corresponding stored thereof, its purpose is when the shows signal parameter to be corrected that reads described storage in the step 42 after at this moment step 43 when judging from same signal source, then can directly call corresponding correction parameter.In order to reach this purpose, storage mode herein can be to store in the mode of the different field of same record, can certainly adopt other anyly can make any storage mode of the unique corresponding one group of correction parameter of described shows signal parameter to be corrected and do not influence enforcement of the present invention.
In addition, when the storage data reach predetermined value, then cover previous shows signal parameter and correction parameter thereof with new shows signal parameter and correction parameter thereof.Described previous shows signal parameter that need to cover and correction parameter thereof can be after according to time sequence the earliest or the display parameter and the correction parameter thereof of storage early.Certainly, described previous shows signal parameter and the correction parameter thereof that need to cover also can be to judge according to frequency of utilization, promptly uses minimum or less previous shows signal parameter of frequency and correction parameter thereof to be to need to cover; Here can be to access times field of recording setting of each previous shows signal parameter and correction parameter thereof, the access times of this record that adds up judge with convenient whether this record is the described record that needs covering.
Wherein, described predetermined value can be the maximal value of memory capacity, it also can be a predefined dominant record numerical value, this value can be stored in this storage unit 25 of means for correcting 2, just the record number that will store when at every turn increasing new stored record and this value compare, to judge whether to reach this maximal value.
Need to prove that described record is meant the one group of display parameter and the correction parameter thereof of storage.
What need further specify is that display device described in the present invention can be televisor or other any appropriate display device.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (10)
1, a kind of shows signal method for correcting phase may further comprise the steps:
A, reception shows signal parameter to be corrected comprise that at least synchronous width parameter, synchronous back are along width parameter and synchronous polarity parameter;
B, judge that whether the synchronous polarity parameter of this signal to be corrected is coupling polarity; If not then the synchronous width parameter of described shows signal to be corrected is set to synchronous back along width parameter with synchronous back along the width parameter sum;
Synchronous back after c, the described correction is set to the actual displayed parameter along width parameter as correction parameter;
Described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, coupling polarity was negative polarity; When display device regulation negative edge triggered reference position identification, coupling polarity was positive polarity.
2, method according to claim 1 is characterized in that: also include step a1 between described step a and step b:
A1, if the synchronous polarity parameter of described signal to be corrected is a coupling polarity, then finish the correction process, and described shows signal parameter to be corrected is set to the actual displayed parameter.
3, method according to claim 1 and 2 is characterized in that: between described step b and step c, perhaps after the step c, also comprise steps d:
The shows signal parameter and the correction parameter thereof that receive among d, the described step a of storage.
4, method according to claim 3 is characterized in that: also comprise step a2 between described step a and step b:
A2, according to the comparison of the corresponding parameter of the shows signal to be corrected that receives among the shows signal parameter of storing in the described steps d and the step a, judge described shows signal to be corrected whether with the shows signal of previous storage from same signal source, if, then directly the correction parameter of the previous shows signal of described storage is set to the actual displayed parameter, if not, execution in step b then.
5, method according to claim 4, it is characterized in that, when the record number of the shows signal parameter of described storage and correction parameter thereof reaches predetermined value, then cover previous shows signal parameter and correction parameter thereof with new shows signal parameter and correction parameter thereof.
6, method according to claim 1 and 2 is characterized in that, described shows signal is the VGA signal.
7, a kind of shows signal phase correction unit comprises:
Receiving element is used to receive shows signal parameter to be corrected;
Comparing unit is used to judge whether the synchronous polarity parameter of described signal to be corrected is coupling polarity, if then finish the correction process; Otherwise, enter processing unit;
Processing unit, when described synchronous polarity is not the coupling polarity chron, the synchronous width parameter that is used for described shows signal to be corrected and back synchronously are set to synchronously the back along width parameter along the width parameter sum;
Output unit is used for the synchronous back after the correction of described processing unit output along width parameter as correction parameter and be set to the actual displayed parameter;
Wherein, described coupling polarity is meant: when display device regulation rising edge triggered reference position identification, coupling polarity was negative polarity; When display device regulation negative edge triggered reference position identification, coupling polarity was positive polarity.
8, device according to claim 7 is characterized in that, also comprises in described phase correction unit:
Storage unit is used for storing shows signal parameter and the correction parameter thereof that receiving element receives;
Recognition unit, be used for comparison according to shows signal parameter with the corresponding parameter of the shows signal to be corrected of receiving element reception of described cell stores, judge that whether described shows signal to be corrected is same signal source with previous shows signal, if then directly the correction parameter of the described previous shows signal of cell stores is set to the actual displayed parameter; If not, then export described comparing unit to.
9, according to claim 7 or 8 described devices, it is characterized in that: the shows signal parameter to be corrected that described receiving element receives comprises that at least synchronous width parameter, synchronous back are along width parameter and synchronous polarity parameter.
10, according to claim 7 or 8 described devices, it is characterized in that: described shows signal is the VGA signal.
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|---|---|---|---|
| CN2007100141917A CN101290764B (en) | 2007-04-16 | 2007-04-16 | Phase correcting method and device for display signal |
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| CN2007100141917A CN101290764B (en) | 2007-04-16 | 2007-04-16 | Phase correcting method and device for display signal |
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| CN101290764B CN101290764B (en) | 2010-07-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105574881A (en) * | 2015-12-29 | 2016-05-11 | 合肥宏晶微电子科技股份有限公司 | Vga boundary detection technology |
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| JP3158740B2 (en) * | 1992-11-20 | 2001-04-23 | ソニー株式会社 | Digital video signal transmission method and dubbing method |
| US7262784B2 (en) * | 2003-05-02 | 2007-08-28 | Etron Technology, Inc. | LCD controller to hold a fixed image aspect ratio |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105574881A (en) * | 2015-12-29 | 2016-05-11 | 合肥宏晶微电子科技股份有限公司 | Vga boundary detection technology |
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