CN101887679B - Method and system for reducing dynamic false contours - Google Patents
Method and system for reducing dynamic false contours Download PDFInfo
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Abstract
The invention provides a method and a system for reducing dynamic false contours. The method and the system are suitable for display equipment using a sub-field driving technology. In the method, before the display equipment displays a current frame image, a current frame image sub-field coding mode to be adopted by the current frame image is determined; the current frame image sub-field coding mode is different from a former frame image sub-field coding mode adopted by a former frame image of the current frame image; and the display equipment displays the current frame image in the current frame image sub-field coding mode. The system comprises a random code generator and a sub-field mapping converter which are respectively used for generating a false random number in a preset mode and mapping according to the false random number to obtain the sub-field coding mode of the current frame image. By using the ransom characteristic of the false random number, the sub-field coding mode is dynamically changed in the aspect of time; the generation of the dynamic false contours is reduced in essence; and the method is essentially different from the treating scheme of dynamically changing the displaying data in the aspect of space by using a fixed sub-field coding mode.
Description
Technical field
The present invention relates to the display process field, more specifically, relate to a kind of method and system that reduce dynamic false contours.
Background technology
At present, in the display device of the molecular field display technique representing gradation level of using, when showing dynamic image, dynamic false contours can appear.In order to improve dynamic false contours; Use the coded system of new stator field in the present display device; Or technology such as use dither algorithm or error diffusion; These technology all are the technology that changes the minimizing dynamic false contours that carries out on the space of video data, the part that all comes with some shortcomings, as needs take that very big resource or dynamic false contours reduce not ideal enough etc.
Summary of the invention
The present invention aims to provide a kind of method and system that reduce dynamic false contours, can solve the equipment that adopts the molecular field display technique to show produces dynamic false contours when showing dynamic image technical matters.
For this reason; One aspect of the present invention provides a kind of method that reduces dynamic false contours; Be applicable to the display device that adopts a son actuation techniques; It comprised the following steps: before display device shows current frame image, confirm that current frame image is about to this two field picture sub-field code mode that adopts, and this two field picture sub-field code mode was different with the prior image frame sub-field code mode that the former frame image of current frame image is adopted; Display device adopts this two field picture sub-field code mode to show current frame image.
Further, confirm that this two field picture sub-field code mode that current frame image is about to adopt can comprise: generate first pseudo random number with predetermined manner, this first pseudo random number belongs to the set of first pseudo random number; Judge whether first pseudo random number belongs to the set of second pseudo random number; One or more pseudo random numbers in this second pseudo random number set are corresponding to a kind of sub-field code mode; If then draw the sub-field code mode corresponding with it according to this first pseudo random number mapping that belongs to the set of second pseudo random number; If not, return the aforementioned step that generates first pseudo random number with predetermined manner; With the sub-field code mode that draws as said two field picture sub-field code mode.
Further; Display device adopts this two field picture sub-field code mode to show that the step of current frame image comprises: change the coded system of the RGB data of input according to this two field picture sub-field code mode, form and corresponding two field picture RGB of this two field picture sub-field code mode data; Generate corresponding with it two field picture sub-field code address signal according to this two field picture RGB data; Keep pulse according to the generation of N pseudo random number and this two field picture field of its respective numbers; Display device is according to this two field picture RGB data, sub-field code address signal, and pulse demonstration current frame image is kept in this two field picture field.
Another aspect of the present invention also provides a kind of system that reduces dynamic false contours; Be applicable to the display device that adopts a son actuation techniques; It comprises: random code generator, be used for generating first pseudo random number with predetermined manner, and this first pseudo random number belongs to the set of first pseudo random number; A son mapping transformation device; Be used to judge whether first pseudo random number belongs to the set of second pseudo random number; One or more pseudo random numbers in this second pseudo random number set are corresponding to a kind of sub-field code mode; If then draw the sub-field code mode corresponding with it according to first pseudo random number mapping that belongs to the set of second pseudo random number; Otherwise, generate a pseudo random number that belongs to this first pseudo random number set with predetermined manner once more by said random code generator.
Further; An above-mentioned son mapping transformation device can also comprise: the RGB data processing equipment; Be used for changing the coded system of the RGB data of input, form and corresponding two field picture RGB of this two field picture sub-field code mode data according to this two field picture sub-field code mode.
Further, the system of reduction dynamic false contours of the present invention can also comprise: the address signal generator can be used for generating this two field picture sub-field code address signal corresponding with it according to this two field picture RGB data; Keep pulse producer, can be used for keeping pulse according to this two field picture field of N pseudo random number generation respective numbers.
Further; The address signal generator can comprise RGB data receiver and address signal output terminal; Said RGB data receiver can be used to receive this two field picture RGB data, and the address signal output terminal can be used to generate this two field picture sub-field code address signal soldier said two field picture sub-field code address signal flowed to said display device; Keeping pulse producer can comprise the random number receiving end and keep pulse output end; The random number receiving end can be used to receive said N pseudo random number, keeps this two field picture field that pulse output end can be used to generate respective numbers and keeps pulse and said two field picture kept pulse and flow to said display device.
The present invention has following technique effect:
In the procedure for displaying of each two field picture, the sub-field code mode all sub-field code mode with the previous frame image is different, has reduced the generation of dynamic false contours in itself.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structure intention of the preferred embodiment of the present invention;
Fig. 2 is a son mapping transformation process synoptic diagram of the preferred embodiment of the present invention; And
Fig. 3 is the random code generator inner structure synoptic diagram of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Fig. 1 is the structural representation of the preferred embodiment of the present invention, and Fig. 2 is a son mapping transformation process synoptic diagram of the preferred embodiment of the present invention, and is as depicted in figs. 1 and 2.One aspect of the present invention provides a kind of method that reduces dynamic false contours; This method is applicable to the display device that adopts a son actuation techniques; The core concept of this method is the sub-field code mode that dynamically changes in time; Be that display device is before showing current frame image; Can at first utilize the random character of pseudo random number to confirm that current frame image is about to this two field picture sub-field code mode that adopts, and makes this two field picture sub-field code mode different with the prior image frame sub-field code mode that the former frame image of current frame image is adopted; Then, make display device adopt above-mentioned this two field picture sub-field code mode of just having confirmed to show current frame image, just can overcome effectively owing to the stator field existing defective of coded system intrinsic property produces dynamic false contours.
Next, the step of confirming above-mentioned two field picture sub-field code mode is specified:
(1.1) generate first pseudo random number with predetermined manner, this first pseudo random number should belong to first pseudo random number set, and the scope of first pseudo random number set changes with the change of said predetermined manner;
Predetermined manner described in this step; It can be the generating mode of artificial predefined a kind of pseudo random number; This predetermined manner should be tried one's best and reasonably satisfied the requirement of randomness, and so, the pseudo random number that under this kind predetermined manner, produces should belong to a definite pseudo random number set.At this, can this set be called the set of first pseudo random number.The scope of this first pseudo random number set can be very big, also can be smaller, and the variation of its scope should change along with the variation of said predetermined manner.
(1.2) judge whether first pseudo random number belongs to second pseudo random number set, the one or more pseudo random numbers in said second pseudo random number set are corresponding to a kind of sub-field code mode,
If first pseudo random number belongs to the set of second pseudo random number, then can draw the sub-field code mode corresponding according to this first pseudo random number mapping with it;
Otherwise; Generate a pseudo random number that belongs to the set of first pseudo random number with predetermined manner once more; As second pseudo random number; And judge once more whether the second newly-generated pseudo random number belongs to the set of second pseudo random number, if still do not belong to the set of second pseudo random number, then continue to generate the new pseudo random number that belongs to the set of first pseudo random number with predetermined manner; Until the pseudo random number that obtains belonging to the set of second pseudo random number, draw the sub-field code mode corresponding according to the pseudo random number mapping that belongs to the set of second pseudo random number that obtains then with it;
In fact; The set of second pseudo random number should be a sub-set of first pseudo random number set; When generated the pseudo random number that belongs to the set of first pseudo random number through predetermined manner after; Can from the set of first pseudo random number, select several pseudo random numbers artificially, form the set of second pseudo random number, and make the one or more pseudo random numbers in this second pseudo random number set all corresponding with a kind of sub-field code mode; Can a pseudo random number corresponding to a kind of sub-field code mode, also can be that a plurality of pseudo random numbers are corresponding to a kind of sub-field code mode.
For fear of the sub-field code mode that duplicates, in the present embodiment, a pseudo random number in the set of second pseudo random number is all corresponding to a kind of sub-field code mode, and promptly pseudo random number and sub-field code mode are for concern one to one.In practice, can embody through setting up sub-field coding mapping transformation table, in this table; All pseudo random numbers that comprised the set of second pseudo random number, and can each pseudo random number be listed with the row in the table, correspondingly; Can with the corresponding sub-field code mode of each pseudo random number, layout in table with the corresponding position of sub-field code mode, like this; After obtaining belonging to the pseudo random number of second pseudo random number set; Just can confirm and corresponding two field picture sub-field code of this pseudo random number mode, thereby realize adopting different sub-field code modes to show the purpose of every two field picture through the mode of tabling look-up.
In fact; If generate the small number of pseudo random number through predetermined manner; The scope that is to say the set of first pseudo random number is smaller; Then can directly the set of first pseudo random number be gathered as second pseudo random number, i.e. this moment, the set of first pseudo random number is same set with the set of second pseudo random number.
According to above-mentioned steps (1.1) and step (1.2), just can draw this two field picture sub-field code mode that current frame image is about to employing.
After the sub-field code mode that obtains current frame image employing soon, also need carry out the following step, can make display device show current frame image according to above-mentioned this two field picture sub-field code mode that obtains:
(2.1) change the coded system of the RGB data of input according to resulting two field picture sub-field code mode, form and corresponding two field picture RGB of this two field picture sub-field code mode data;
(2.2) generate corresponding with it two field picture sub-field code address signal according to this two field picture RGB data;
(2.3) keep pulse according to the pseudo random number generation of confirming in the above-mentioned steps (1.2) that belongs to the set of second pseudo random number and this two field picture field of its respective numbers;
(2.4) display device is according to this two field picture RGB data, the sub-field code address signal that obtain, and this two field picture field is kept pulse and shown current frame image.
In addition, another aspect of the present invention also provides a kind of system that reduces dynamic false contours, and this system is applicable to the display device that adopts a son actuation techniques, and it can comprise:
Random code generator S11; With a son mapping transformation device S12; Wherein, random code generator S11 is used for generating first pseudo random number with predetermined manner, and this first pseudo random number belongs to the set of first pseudo random number; The scope of said first pseudo random number set should change with the change of said predetermined manner; A son mapping transformation device S12 also comprises: judgment means S121; Be used to judge whether said first pseudo random number belongs to the set of second pseudo random number; One or more pseudo random numbers in said second pseudo random number set are corresponding to a kind of sub-field code mode; If then draw the sub-field code mode corresponding with it according to first pseudo random number mapping that belongs to said second pseudo random number set; Otherwise; Generate a pseudo random number that belongs to the set of first pseudo random number with predetermined manner once more by random code generator S11; As second pseudo random number; And judge once more whether this second pseudo random number belongs to second pseudo random number set, until the N pseudo random number that obtains belonging to said second pseudo random number set, and draw the sub-field code mode corresponding with it according to the N pseudo random number mapping that obtains; At last, with the sub-field code mode that draws as this two field picture sub-field code mode.
Fig. 3 is the random code generator inner structure synoptic diagram of the preferred embodiment of the present invention, and as shown in Figure 3, random code generator can adopt inner structure shown in Figure 3.
In order to make display device show current frame image according to newly-generated sub-field code mode; A son mapping transformation device S12 can also comprise RGB data processing equipment S122; Be used for changing the coded system of the RGB data of input, form and corresponding two field picture RGB of this two field picture sub-field code mode data according to above-mentioned two field picture sub-field code mode.Wherein, RGB data processing equipment S122 can comprise data receiver and data output end, and data receiver is used to receive the RGB data of input, and data output end is used for giving said display device with this two field picture RGB data delivery.
A said son mapping transformation device S12 can also comprise: RGB data processing equipment S122; Be used for changing the coded system of the RGB data of input, form and corresponding two field picture RGB of this two field picture sub-field code mode data according to this two field picture sub-field code mode.
Native system can also comprise: address signal generator S21 is used for generating this two field picture sub-field code address signal corresponding with it according to this two field picture RGB data; Keep pulse producer S22, be used for keeping pulse according to this two field picture field of N pseudo random number generation respective numbers.
For display device is effectively received and corresponding two field picture RGB of this two field picture sub-field code mode data, this two field picture sub-field code address signal; And pulse is kept in this two field picture field; Address signal generator S21 comprises RGB data receiver and address signal output terminal; The RGB data receiver is used to receive this two field picture RGB data, and the address signal output terminal is used for this two field picture sub-field code address signal is flowed to said display device; Keep pulse producer and comprise the random number receiving end and keep pulse output end, the random number receiving end is used to receive the N pseudo random number, keeps pulse output end and is used for that this two field picture is kept pulse and flows to display device.
Through concrete example, embody the implementation of method and system of the present invention below:
Suppose that a two field picture in the existing display device adopts 8 sons to drive and shows, so, can have 8!=4032 kinds of different sub-field code modes; For the sub-field code mode that makes every two field picture all inequality; Can set a kind of predetermined manner; The scope from 0 to 4031 of the pseudo random number that generates through this predetermined manner then can make the corresponding a kind of sub-field code mode of each pseudo random number, and can the mapping relations of each pseudo random number and every seed field coded system be write a sub-field mapping transformation table; And should deposit among the son mapping transformation device S12, by mapping transformation table in child field so that follow-up use.
Next, how to confirm that through the instance explanation current frame image is about to the sub-field code mode that adopts:
Suppose that the sub-field code that display device shows that the former frame image adopts is [1 248 16 3,264 128].
At first; Confirm that by the sub-field code mode random code generator S11 among the device S1 generates a pseudo random number 23 in 0 to 4031 scope at random according to above-mentioned predetermined manner; Suppose through searching above-mentioned sub-field transformation mapping table; Obtain the sub-field code mode corresponding for [1 428 32 16 128 64], with this sub-field code mode this two field picture sub-field code mode the most with 23.
In this example; Because the pseudo random number and the sub-field code mode that generate according to predetermined manner are to concern one to one; That is to say; The set of first pseudo random number is same set with the set of second pseudo random number, at this, whether belongs to the set of second pseudo random number with regard to the pseudo random number that belongs to the set of first pseudo random number that random code generator S11 is not produced and judges.
Next, change the coded system of the RGB data of input through RGB data processing equipment S122 according to this two field picture sub-field code mode that generates again, form and corresponding two field picture RGB of this two field picture sub-field code mode data.
Next, give the address signal generator S21 among the adjusting gear S2, generate and corresponding two field picture sub-field code of this two field picture RGB data address signal by this address signal generator S21 with this two field picture RGB data delivery.
At last, this two field picture sub-field code mode, this two field picture RGB data that will obtain through above-mentioned steps, and this two field picture sub-field code address signal sends to display device, shows current frame image by display device.
Obviously; It is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize that they can concentrate on the single calculation element with the general calculation device; Perhaps be distributed on the network that a plurality of calculation element forms; Alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby can they be stored in the memory storage; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a method that reduces dynamic false contours is applicable to the display device that adopts a son actuation techniques, it is characterized in that, comprising:
Before said display device shows current frame image; Confirm that current frame image is about to this two field picture sub-field code mode that adopts, and said two field picture sub-field code mode is different with the prior image frame sub-field code mode that the former frame image of said current frame image is adopted;
Said display device adopts said two field picture sub-field code mode to show said current frame image;
Wherein, this two field picture sub-field code mode of be about to adopting of said definite current frame image comprises:
Generate first pseudo random number with predetermined manner, said first pseudo random number belongs to the set of first pseudo random number;
Judge whether said first pseudo random number belongs to second pseudo random number set, the one or more pseudo random numbers in said second pseudo random number set are corresponding to a kind of sub-field code mode,
If then draw the sub-field code mode corresponding with it according to this first pseudo random number mapping that belongs to said second pseudo random number set;
If not, return the aforementioned step that generates first pseudo random number with predetermined manner;
With the sub-field code mode that draws as said two field picture sub-field code mode.
2. the method for reduction dynamic false contours according to claim 1 is characterized in that, said display device adopts said two field picture sub-field code mode to show that the step of said current frame image comprises:
Change the coded system of the RGB data of input according to said two field picture sub-field code mode, form and corresponding two field picture RGB of said two field picture sub-field code mode data;
Generate corresponding with it two field picture sub-field code address signal according to said two field picture RGB data;
Keep pulse according to said N pseudo random number generation and this two field picture field of its respective numbers;
Said display device is according to said two field picture RGB data, said sub-field code address signal, and pulse demonstration current frame image is kept in said two field picture field.
3. a system that reduces dynamic false contours is applicable to the display device that adopts a son actuation techniques, it is characterized in that, comprising:
Random code generator is used for generating first pseudo random number with predetermined manner, and said first pseudo random number belongs to the set of first pseudo random number;
Son mapping transformation device is used to judge whether said first pseudo random number belongs to the set of second pseudo random number, and the one or more pseudo random numbers in said second pseudo random number set are corresponding to a kind of sub-field code mode,
If then draw the sub-field code mode corresponding with it according to first pseudo random number mapping that belongs to said second pseudo random number set;
Otherwise, generate a pseudo random number that belongs to said first pseudo random number set with predetermined manner once more by said random code generator.
4. a kind of system that reduces dynamic false contours as claimed in claim 3 is characterized in that, a said son mapping transformation device also comprises:
The RGB data processing equipment is used for changing according to said two field picture sub-field code mode the coded system of the RGB data of input, forms and corresponding two field picture RGB of said two field picture sub-field code mode data.
5. a kind of system that reduces dynamic false contours as claimed in claim 4 is characterized in that this system also comprises:
The address signal generator is used for generating this two field picture sub-field code address signal corresponding with it according to said two field picture RGB data;
Keep pulse producer, be used for keeping pulse according to this two field picture field of said N pseudo random number generation respective numbers.
6. a kind of system that reduces dynamic false contours as claimed in claim 5 is characterized in that,
Said address signal generator comprises RGB data receiver and address signal output terminal; Said RGB data receiver is used to receive said two field picture RGB data, and said address signal output terminal is used to generate this two field picture sub-field code address signal soldier said two field picture sub-field code address signal flowed to said display device;
The said pulse producer of keeping comprises the random number receiving end and keeps pulse output end; Said random number receiving end is used to receive said N pseudo random number, saidly keeps this two field picture field that pulse output end is used to generate respective numbers and keeps pulse and said two field picture kept pulse and flow to said display device.
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| CN105718235B (en) * | 2016-03-22 | 2019-02-05 | 华为技术有限公司 | Processing method, device and the image display system that image is shown |
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| CN1662944A (en) * | 2002-06-28 | 2005-08-31 | 汤姆森许可贸易公司 | Method and apparatus for processing video pictures to improve dynamic false contour effect compensation |
| JP2005249928A (en) * | 2004-03-02 | 2005-09-15 | Samsung Sdi Co Ltd | Pdp display apparatus and pdp display method |
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| US6476875B2 (en) * | 1998-08-07 | 2002-11-05 | Thomson Licensing S.A. | Method and apparatus for processing video pictures, especially for false contour effect compensation |
| CN1335583A (en) * | 2000-07-12 | 2002-02-13 | 汤姆森许可贸易公司 | Method for processing video frequency image and apparatus for processing video image |
| EP1256924A1 (en) * | 2001-05-08 | 2002-11-13 | Deutsche Thomson-Brandt Gmbh | Method and apparatus for processing video pictures |
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