CN1750096A - Dynamic subfield coding method for color plasma display image - Google Patents
Dynamic subfield coding method for color plasma display image Download PDFInfo
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- CN1750096A CN1750096A CNA2005100961599A CN200510096159A CN1750096A CN 1750096 A CN1750096 A CN 1750096A CN A2005100961599 A CNA2005100961599 A CN A2005100961599A CN 200510096159 A CN200510096159 A CN 200510096159A CN 1750096 A CN1750096 A CN 1750096A
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Abstract
The present invention discloses one kind of dynamic sub-field coding method for color plasma display image. The method performs MPD calculation of all the possible sub-field codes of the current treated pixel based on the sub-field code of the decided adjacent pixel, selects the sub-field code of the current brightness level corresponding to the minimum MPD value as the sub-field code for realizing the current brightness level in image display via comparison, and completes dynamic sub-field code of all the pixels successively, so as to minimize the influence of dynamic pseudo contour and raise image quality.
Description
Technical field
The present invention relates to the disposal route that a kind of image that adopts the AC plasma display plate of many grades gray scale that sub-displaying mode realizes image shows, specially refer to the sub-field code that faces pixel mutually that a kind of basis determined carries out the dynamic subfield coding to current pixel disposal route.
Background technology
AC plasma display plate (AC Plasma Display Panel) utilizes gas discharge to realize the demonstration of image, in giant-screen flat pannel display field huge competitive power is arranged.AC PDP adopts how sub-field technology to realize that the multi-grayscale of image shows, being about to a two field picture is divided into a plurality of sons and realizes, different son fields have different weights, the son field of different weights can realize that by sub combination to different weights the multi-grayscale of image shows corresponding to different luminance weights (corresponding in the circuit realization promptly is to keep the Discharge illuminating number of times).
In the display device that adopts sub-field technology realization multi-grayscale, can produce the image fault of so-called dynamic false contours (Dynamic False Contour).The former reason that produces dynamic false contours adopts the integrating effect of sub-field technology and human eye to cause.Dynamic false contours has become the key factor that restriction AC PDP picture quality further improves.
Currently proposed various disposal routes, suppressed the influence of dynamic false contours, such as a compression fluorescent lifetime method being arranged, cut apart authority baryon field method, adjusting a son DISPLAY ORDER method, compensated pulse method, error-diffusion method etc. to display image.Diverse ways respectively has its advantage and defect part.Wherein cutting apart authority baryon field method and adjust being used in combination of a son DISPLAY ORDER method, is the simple and outstanding effect disposal route of a kind of processing, can be referred to as a son adjustment method.It is a kind of method that generally adopts that son is adjusted, because no matter be other error-diffusion method or compensated pulse method etc., all can relate to a son notion of adjusting.
A son adjustment method has obtained very big development, formed a complete son weight system of selection, sub-field sequence arrangement method and the sub-field code system of selection under the particular subfield vector of a cover, wherein calculating MPD (Moving Pixel Distortion) is the effective ways of judging sub-field code, and the computing method of MPD are as follows:
d
mpd(B
i，B
j，SP)＝|B
i-B
j|*SP
T-|i-j| (1)
In the formula, i, j refer to the brightness degree that needs show respectively, and SP refers to a determined son weight vectors, and Bi, Bj refer to brightness degree i, j selected corresponding subfield coding method under a son vectorial SP respectively.
By calculating to MPD, can judge certain seed field vector SP and under this child field vector the subfield coding method of certain brightness degree to the situation that influences of dynamic false contours.Generally, an original son vector is expanded, employing comes the antithetical phrase field to encode greater than an original sub-number of fields purpose vector, and with each the son weight adjust, like this, for a certain brightness degree, may there be multiple subfield coding method, to the calculating of each MDP, select a kind of desirable subfield coding method that can realize this brightness degree by in advance.But these systems of selection are independently to carry out under the situation that has broken away from image information, can't be according to the image information selection of reasonably encoding.Though the sub-field code of certain brightness is best to the sub-field code of other certain brightness, may not be best to the sub-field code of other second brightness degree.Such as: chooser field vector SP
1=1: 2: 4: 8: 16: 32 6 sons, can realize all totally 64 the grade gray scales from 0 to 63.The son field is expanded to 8 son fields and adjusts, adjust son field, a back vector and become SP
2=2: 13: 4: 13: 5: 13: 1: 12.Since adjust to 8 son fields from 6 son fields, thus for a certain brightness degree, just might there be multiple coding method, as shown in table 1.
The multiple sub-field code of three kinds of brightness degrees of table 1
| Brightness degree | Subfield coding method |
| 25 | 11101010 10111010 10101110 |
| 01000001 00010001 00000101 | |
| 27 | 01010010 01000110 00010110 |
| 11000001 10010001 10000101 | |
| 29 | 11000110 11010010 10010110 |
| 01100001 00110001 00100101 |
Adopt formula (1) to calculate, can obtain: when being encoded to 01000001 or 00010001 or 00000101 with 25, and 27 correspondences are encoded to 11000001 or 10010001 or at 10000101 o'clock, the MPD minimum between the brightness degree 25 and 27, and MPD (B
25, B
27, SP
2)=0.When being encoded to 01010010 or 01000110 or 00010110 with 27, and 29 correspondences are encoded to 11010010 or 11000110 or at 10010110 o'clock, the MPD minimum between the brightness degree 27 and 29, and MPD (B
27, B
29, SP
2)=0.But as can be seen by top calculating, brightness degree 27 not only do not made MPD minimum (0) between 27 and 25, but also make the coded system of the MPD minimum (0) between 27 and 29, though 27 exist and make the coded system of the MPD minimum (0) between 25,27 and 27,29 respectively.
If promptly the sub-field code mode is fixed up, MPD the best between a certain grade gray scale and other first grade gray scale, but MPD can't reach best between this grade gray scale and other second grade gray scale, and promptly the sub-field code of this grade gray scale can't be taken into account other all brightness degree.Ways of addressing this issue is exactly can carry out dynamic coding according to image information but not adopt the constant coding method be predetermined.Content of the present invention proposes dynamic subfield Methods for Coding and realization exactly.
Summary of the invention
The objective of the invention is to propose a kind of dynamic subfield coding method of color plasma display image.
In order to realize above-mentioned task, the present invention adopts following technical scheme.
A kind of dynamic subfield coding method of color plasma display image, this method is according to the determined sub-field code that faces pixel mutually, carrying out MPD by all possible sub-field code with current processed pixels calculates, by comparing, when showing as image, realizes the sub-field code of selecting the pairing current brightness degree of minimum MPD value the sub-field code of this brightness degree, and finish the dynamic subfield coding of all pixels successively, make the minimum that influences of dynamic false contours.
Realize the device of said method, following several technical scheme arranged:
Scheme one:
This device comprises:
Finger, this finger contains many look-up tables, and every table includes under a fixed son vector, can realize a kind of sub-field code mode of brightness degree to all; Be used under certain son vector, realize in the brightness degree searching or searching less than the number of sub-field code of maximum sub-field code numbers being arranged, and output being to the multiple sub-field code mode of a certain brightness degree;
If a certain brightness degree has fewer purpose sub-field code, then Shu Chu multiple sub-field code mode can repeat;
A MPD counter is used for the institute of a certain brightness degree of look-up table output might be carried out MPD calculating with the sub-field code of having handled that faces pixel mutually by sub-field code;
A comparer is used for the MPD value from the input of MPD counter is compared mutually, select minimum MPD value, and output can indicate the coding of the sub-field code in the pairing MDP of the being input to counter of this minimum MPD value;
A selector switch is used for selecting the final sub-field code of corresponding a kind of conduct to the current pixel brightness degree according to the output result of comparer from the multiple sub-field code of look-up table output;
An impact damper is used for keeping in the sub-field code of having handled that faces pixel mutually, as carrying out the input that MPD calculates with the pending pixel of the next one;
Finger is communicated with MPD counter and selector switch respectively, and the MPD counter links to each other with selector switch by comparer, and selector switch returns the input end of MPD counter by impact damper.
Scheme two comprises:
First finger, this finger be according to the raw data of input, and output is to the information of searching of second finger, comprises a certain table and the address information in this table that should search in second finger.
Second finger is provided with many tables in this part, be in theory under certain son vector, can realize having in the brightness degree number of maximum sub-field codes, and the finger number less than this number also can be set.Sub-field code with brightness degree of similar number sub-field code is placed in same the look-up table; Select a certain the look-up table in second finger and the content of a certain address according to the output content of first finger, a certain group of institute that is the input brightness degree in the output might sub-field code.
Multichannel MPD counter, many look-up tables in separate and second finger of every road MPD counter are corresponding respectively.Sub-field code with many look-up table outputs carries out MPD calculating with the sub-field code of having handled that faces pixel mutually respectively.The many groups of output MPD value, but every group of a plurality of MPD values that comprise different numbers.
Multichannel comparer, the multichannel result of calculation in the separate and MPD counter of every road comparer are corresponding respectively.A plurality of MPD values that every road comparer will be input in this road compare mutually, select to be input to the minimum MPD value in this road, and output can indicate the pairing coding that is input to the sub-field code in the corresponding MDP counter of this minimum MPD value.
First selector, it is corresponding respectively that separate MUX and the multichannel in the comparer are set.Every road selector switch is selected corresponding a kind of output according to the information that is input to this road from comparer from the multiple sub-field code of second finger corresponding tables output.
Second selector is according to selecting one the tunnel to export from the multichannel sub-field code of first selector output from the information of first finger output, as the final sub-field code output to current brightness degree.
An impact damper is used for keeping in the sub-field code of having handled that faces pixel mutually, as carrying out the input that MPD calculates with the pending pixel of the next one.
First finger is connected with second finger, second selector respectively, second finger is connected with multichannel MPD counter, first selector respectively, the MPD counter is connected with first selector by the multichannel comparer, and second selector returns the input end of multichannel MPD counter by impact damper.
Scheme three comprises:
First finger, this finger be according to the raw data of input, and output is to the information of searching of second finger, comprises a certain table and the address information in this table that should search in second finger.
Second finger is provided with many look-up tables in this table, be in theory under certain son vector, can realize having in the brightness degree number of maximum sub-field codes, and the look-up table number less than this number also can be set; Sub-field code with brightness degree of similar number sub-field code is placed in same the look-up table; Select a certain the look-up table in second finger and the content of a certain address according to the output content of first finger, a certain group of institute that is the input brightness degree of output might sub-field code.
Multichannel data form adjustment unit, this multichannel data form adjustment unit is separate, and many look-up tables in the every road and second finger are corresponding respectively, and the data of the multichannel different-format of many look-up tables outputs are adjusted into consolidation form.When data layout is adjusted, as the adjustment standard, when the data of less number output are adjusted to the output of plurality purpose, the sub-field code data duplicate allocation of significance bit is lacked on the position to data according to the output of maximum numbers.
First selector is selected corresponding circuit-switched data output according to the table information of first finger output from the multichannel data of multichannel data form adjustment unit input, the institute that has wherein comprised the current pixel brightness degree might sub-field code.
A MPD counter is used for the institute of a certain brightness degree of first finger output might be carried out MPD calculating with the sub-field code of having handled that faces pixel mutually by sub-field code
A comparer will compare mutually from the MPD value of MPD counter input, select minimum MPD value, and output can indicate the coding of the sub-field code in the pairing MDP of the being input to counter of this minimum MPD value.
A selector switch might be selected the final sub-field code of a kind of conduct of correspondence to the current pixel brightness degree the sub-field code according to the output result of comparer from the institute of first selector output.
An impact damper is used for keeping in the sub-field code of having handled that faces pixel mutually, as carrying out the input that MPD calculates with the pending pixel of the next one.
First finger is connected with first selector with second finger respectively; Second finger is connected with first selector by the data layout adjustment unit, first selector is connected with second selector with the MPD counter respectively, the MPD counter is connected with second selector by comparer, and selector switch returns the input end of MPD counter by impact damper.
Scheme four comprises:
A finger forms the original level of luminance data of input and the sub-field code from the processed pixels of impact damper output the address information of this finger jointly; The output of this table is as the final sub-field code to the current pixel brightness degree.The content of finger is determined as follows: under a stator field vector, the institute of a certain sub-field code A and a certain brightness degree X might be carried out MPD calculating respectively by sub-field code, select the sub-field code of pairing this brightness degree of minimum MPD value X, with this sub-field code as when handling the best sub-field code that faces pixel this brightness degree X when adopting sub-field code A mutually; And this sub-field code is stored in the address of this brightness degree X and the common formation of sub-field code A.Realize that promptly the best sub-field code of brightness degree X is the sub-field code in this address when the treated pixel of facing mutually when adopting sub-field code A.With might sub-field code and the institute of all brightness degrees might encode and carry out MPD respectively and calculate, when selecting different coding respectively for different brightness degree, the sub-field code of pairing this brightness degree of minimum MPD value is stored in the correspondence position of finger respectively.For a son vectorial SP who has selected, suppose and to realize that the brightness degree number is N, the number of all possible coded system is M, then should have N*M address location to represent this N*M kind situation in finger, the combination between promptly different sub-field code modes and the different brightness degree.
An impact damper is used for keeping in the sub-field code of having handled that faces pixel mutually, as carrying out the input that MPD calculates with the pending pixel of the next one.
Because the present invention is according to determined encoding scheme of facing pixel mutually, calculate by carrying out MPD with all possible sub-field code scheme of pending pixel, by comparing, select the best sub-field code of current pixel, handle according to this, finish the dynamic coding of all pixels, can realize effectively reducing dynamic false contours, improve the purpose of picture quality.
Description of drawings
Circuit among Fig. 1 embodiment 1 is realized block scheme.
Circuit among Fig. 2 embodiment 2 is realized block scheme.
Circuit among Fig. 3 embodiment 3 is realized block scheme.
Circuit among Fig. 4 embodiment 4 is realized block scheme.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Embodiment
Embodiment 1:
As Fig. 1, raw data DATA at first passes through finger 11, finger 11 output be encoding scheme more than 1 pair, export K group sub-field code altogether, promptly export the possible sub-field code scheme of institute of a certain brightness degree that raw data DATA represents.This K group sub-field code is sent to MPD counter 12 and selector switch 14 is prepared against use.MPD counter 12 carries out MPD calculating with the K group sub-field code of finger 11 inputs with the last one sub-field code scheme of bringing from impact damper 15 of having handled of facing pixel cell mutually, obtains K batch total calculation result and is sent to comparer 13.In comparer 13, the K group MPD value that MPD counter 12 is brought compares mutually, find out minimum MPD value, and the result that will compare is sent to selector switch 14.14 comparative results of bringing according to comparer 13 of selector switch, from the K group sub-field code that finger 11 is brought, select group coding output, this sub-field code shows as the final sub-field code output to original brightness DATA on the one hand, delivers to impact damper 15 on the other hand as carrying out the input that MPD calculates with the pending pixel of the next one.
In selector switch 14, the comparative result that use is brought from comparer 13 to select 1 group from the K group coding that finger 11 is brought and exports.If but comparer 13 output then can't be selected corresponding sub-field code according to this minimum MPD from the minimum MPD of MPD counter 12 inputs in selector switch, because do not comprised any information of sub-field code in should minimum MPD value.So in comparer 13, the comparative result of output is not the value of the MPD of minimum, but can indicate the coding of the sub-field code in the pairing MDP of the being input to counter 12 of this minimum MPD value.
Owing in the sub-field code process,, may exist multiple sub-field code scheme,,, promptly realize the lookup scheme of one-to-many so be provided with a plurality of tables in finger 11 parts in order fully to compare these a plurality of sub-field code schemes for a certain brightness degree.For different brightness degrees, can realize that the number of sub-field code of this brightness degree is also inequality, minimum has 1, note is K at most.So, in finger 11, in order to select more rational sub-field code, the number that table is set in theory should be under certain son vector, can realize having in the brightness degree number K of maximum sub-field codes, but because 1 and K between may differ greatly, can cause the waste of space resources, so also the number less than the look-up table of K can be set.
Such as for SP=2: 13: 4: 13: 5: 13: 1: 12 a son vector, brightness degree 1,2,3,4 respectively only has 1 encoding scheme, and 25,27,29 respectively have 6 kinds of encoding schemes, if 6 look-up tables are set, so, corresponding to brightness degree 1,2,3,4 these four brightness degrees, what these 6 look-up tables were exported is same seed field encoding scheme, and this has just caused the waste of resource.Improvement to this embodiment is proposed below.
Embodiment 2:
As Fig. 2, raw data DATA is at first through a finger 21, and the output result of finger 21 is input to finger 22.Be provided with common K and open look-up table in finger 22, finger 22 goes to search corresponding a certain according to the output of finger 21, and the output of this look-up table is exactly all sub-field code schemes of original brightness DATA correspondence, also is the corresponding relation more than 1 pair; The result of each look-up table is input in the corresponding MPD counter and goes, and is expressed as MPD counter 23.In MPD counter 23, be provided with finger 22 in the K that contained open the K road MPD counter of look-up table correspondence, respectively with handle the sub-field code (from impact damper 27) that faces pixel mutually and carry out MPD and calculate, its result of calculation then is input in the comparer of comparer 24 correspondences and goes.Also be provided with corresponding K road comparer in the comparer 24, all MPD values that every road comparer will be input in this road compare mutually, described in embodiment 1, the comparer output of every road can indicate the pairing coding that is input to the sub-field code in this road of minimum MPD value in this road, and the coding on this K road is input to selector switch 25.In selector switch 25, also be provided with independently selector switch of K road, corresponding a kind of sub-field code mode is selected according to the output of comparer 24 in every road from all sub-field codes of finger 22 outputs.This K way field coding is sent to selector switch 26 once more, way field coding corresponding in 26 Information Selection K way field codings according to finger 21 outputs of selector switch is as the final sub-field code of raw data DATA, this sub-field code shows as the final sub-field code output to original brightness DATA on the one hand, delivers to impact damper 27 on the other hand as carrying out the input that MPD calculates with next pixel.
It should be noted that, in finger 21, its output is not the sub-field code result of grade brightness DATA, but select information and address information by the table in finger 22 of raw data DATA decision, according to the output of finger 21, know that then should remove to search K in finger 22 opens a certain table in the table and the some addresses in this table.
In finger 22, the number of look-up table can be set according to the maximum number K that can encode, also can be less than this number K.But it arranges principle to be: the coding of the same number of grade brightness that can realize encoding is placed in same the table.Such as, 1,2,3,4 each 1 encoding scheme is only arranged, so just the coding of these four brightness degrees is placed in first look-up table, and 25,27,29 respectively have 6 kinds of encoding schemes, then the coding of these four brightness degrees is placed in the 6th look-up table.In addition, in finger 22, each table is owing to need the different sub-field code scheme of output number, so the data width of its output is inconsistent, so, subsequent treatment comprises steps such as MPD calculating, can need separate multichannel to realize.
By above analysis, as can be seen, embodiment 2 is with the difference of embodiment 1: the coding that embodiment 2 will have the brightness degree of identical sub-field code number is placed in same the look-up table, like this, though just avoided certain brightness degree to have only 1 seed field coded system, needed to be placed on the problem of the wasting of resources that causes in many look-up tables.But another problem that this embodiment brings is to open look-up table if K is set, and then needs to be provided with separate K road MPD counter, K road comparer and K road selector switch, and reason is that the data width of different table output in finger 22 is inconsistent.Provide improvement below to this embodiment.
Embodiment 3:
As shown in Figure 3, at first through a finger 31, its lookup result outputs to finger 32 to raw data DATA.In finger 32, be provided with K and open table for searching, finger 32 goes to search corresponding a certain look-up table and a certain address according to the output of finger 31, its output is exactly all sub-field codes corresponding to a certain brightness degree, also be the corresponding relation more than 1 pair, the result of these look-up tables is sent to data layout adjustment unit 33.In data layout adjustment unit 33, be provided with finger 32 in the separate data layout in K road of set look-up table correspondence adjust circuit, this K circuit-switched data form is adjusted circuit the different data of importing in K road is adjusted into uniform data format, is input to then in the selector switch 34.34 outputs according to finger 31 of selector switch select to adjust from data the adjusted data in a certain road of format unit 33 inputs, and the data of this selection are sent to MPD counter 35 as all sub-field codes to current brightness.The current institute that 35 of MPD counters are selected with selector switch 34 might sub-field code carries out MPD calculating with the sub-field code of the pixel cell of importing from impact damper 38 of having handled, and this result of calculation is sent to comparer 36.Comparer 36 compares the MPD of input mutually, finds out minimum MPD value, and the coding that can indicate the sub-field code in the pairing MPD of the being input to counter 35 of this minimum MPD value is sent to selector switch 37.37 of selector switchs might be selected the final sub-field code of the sub-field code of correspondence as current pixel unit brightness degree the sub-field code according to the output of comparer 36 from the institute of selector switch 34 inputs, this final sub-field code is exported on the one hand as final coding output, on the other hand this coding is sent to impact damper 38, as carrying out the input that MPD calculates with next pixel.
In Fig. 3, in finger 32 parts each is opened the corresponding circuit-switched data form of look-up table and is adjusted circuit, this is because the data output format of each look-up table is inconsistent, this again by the different table correspondence different numbers sub-field code determined, the Another reason that need carry out the data layout adjustment is because have only one group of MPD counter in the subsequent treatment, need to receive identical data layout, the i.e. sub-field code of same number.Each data of opening look-up table output again through a selector switch 34, then obtains can be used for calculating all sub-field codes of this brightness correspondence of MPD through adjusted data.It should be noted that, when data layout is adjusted, should be according to the output of maximum numbers as the adjustment standard, if when the data of less number output are adjusted to the output of plurality purpose, the data that lack should not replenished is 0, and reasonably selecting is that sub-field code duplicate allocation with significance bit lacks on the position to data.
Embodiment 4:
In Fig. 4, the sub-field code that raw data DATA and handling of bringing from buffer zone are faced pixel mutually is the calculated address signal together, sends into finger 41.Export as the final sub-field code of the brightness degree of current pixel unit from the result of finger 41 outputs, be sent to impact damper 42 simultaneously as the address signal that carries out next pending pixel cell.
The finger content is definite among Fig. 4: under a stator field vector, the institute of a certain sub-field code A and a certain brightness degree X might be carried out MPD calculating respectively by sub-field code, select the sub-field code of pairing this brightness degree of minimum MPD value X, with this sub-field code as when handling the best sub-field code that faces pixel this brightness degree X when adopting sub-field code A mutually; And this sub-field code is stored in the address of this brightness degree X and the common formation of sub-field code A.Realize that promptly the best sub-field code of brightness degree X is the sub-field code in this address when the treated pixel of facing mutually when adopting sub-field code A.With might sub-field code and the institute of all brightness degrees might encode and carry out MPD respectively and calculate, when selecting different coding respectively for different brightness degree, the sub-field code of pairing this brightness degree of minimum MPD value is stored in the correspondence position of finger respectively.
For a son vectorial SP who has selected, suppose and to realize that the brightness degree number is N, the number of all possible coded system is M, then should have N*M address location to represent this N*M kind situation in finger, the combination between promptly different sub-field code modes and the different brightness degree.
The difference of present embodiment and embodiment 1,2,3 is: the calculating of the MPD between 1,2,3 pairs of all possible sub-field codes of current pixel of embodiment and the treated pixel cell sub-field code realizes by circuit, selects best sub-field code scheme according to the result of calculation of circuit; Embodiment 4 then is the MPD value of calculating in advance between the sub-field code of all possible sub-field code and varying input signal, best then sub-field code is stored into look-up table in order to searching, when tabling look-up, with sub-field code of having handled that faces pixel mutually and the common address of tabling look-up that forms of current brightness degree.
Claims (6)
1. the dynamic subfield coding method of a color plasma display image, it is characterized in that, this method is according to the determined sub-field code that faces pixel mutually, carrying out MPD by all possible sub-field code number with current processed pixels calculates, by comparing, realize the sub-field code of this brightness degree when the sub-field code of selecting the pairing current brightness degree of minimum MPD value shows as image, and finish the dynamic subfield coding of all pixels successively, make the minimum that influences of dynamic false contours.
2. realize the device of the dynamic subfield coding method of the described color plasma display image of claim 1, it is characterized in that device comprises:
One finger, this finger contains many look-up tables, and every table includes under a fixed son vector, can realize a kind of sub-field code mode of brightness degree to all; Be used under certain son vector, realize in the brightness degree searching or searching less than the number of sub-field code of maximum sub-field code numbers being arranged, and output being to the multiple sub-field code mode of a certain brightness degree;
If a certain brightness degree has fewer purpose sub-field code, then Shu Chu multiple sub-field code mode can repeat;
A MPD counter is used for the institute of a certain brightness degree of look-up table output might be carried out MPD calculating with the sub-field code of having handled that faces pixel mutually by sub-field code;
A comparer is used for the MPD value from the input of MPD counter is compared mutually, select minimum MPD value, and output can indicate the coding of the sub-field code in the pairing MDP of the being input to counter of this minimum MPD value;
A selector switch is used for selecting the final sub-field code of corresponding a kind of conduct to the current pixel brightness degree according to the output result of comparer from the multiple sub-field code of look-up table output;
An impact damper is used for keeping in the sub-field code of having handled that faces pixel mutually, as carrying out the input that MPD calculates with the pending pixel of the next one;
Finger is communicated with MPD counter and selector switch respectively, and the MPD counter links to each other with selector switch by comparer, and selector switch returns the input end of MPD counter by impact damper.
3. realize the device of the dynamic subfield coding method of the described color plasma display image of claim 1, it is characterized in that device comprises:
First finger, this finger is used to export the information of searching to second finger according to the raw data of input, comprises should search in second finger a certain table and the address information in this table;
Second finger, in this part, be provided with many tables, every table includes under certain son vector, can realize having in the brightness degree number of maximum sub-field codes, look-up table number less than this number also can be set, and the sub-field code with brightness degree of similar number sub-field code is placed in same the look-up table; Select a certain the look-up table in second finger and the content of a certain address according to the output content of first finger, in the output a certain group is the institute of input brightness degree might sub-field code;
Multichannel MPD counter, many look-up tables in separate and second finger of every road MPD counter are corresponding respectively.Sub-field code with many look-up table outputs carries out MPD calculating with the sub-field code of having handled that faces pixel mutually respectively.The many groups of output MPD value, but every group of a plurality of MPD values that comprise different numbers;
Multichannel comparer, the multichannel result of calculation in the separate and MPD counter of every road comparer are corresponding respectively.A plurality of MPD values that every road comparer will be input in this road compare mutually, select to be input to the minimum MPD value in this road, and output can indicate the pairing coding that is input to the sub-field code in the corresponding MDP counter of this minimum MPD value;
First selector, comprising separate MUX, multichannel in above-mentioned MUX and the comparer is corresponding respectively, and every road selector switch is selected corresponding a kind of output according to the information that is input to this road from comparer from the multiple sub-field code of second finger corresponding tables output;
Second selector is according to selecting one the tunnel to export from the multichannel sub-field code of first selector output from the information of first finger output, as the final sub-field code output to current brightness degree.
First finger is connected with second finger, second selector respectively, second finger is connected with multichannel MPD counter, first selector respectively, the MPD counter is connected with first selector by the multichannel comparer, and second selector returns the input end of multichannel MPD counter by impact damper.
4. device of realizing the dynamic subfield coding method of the described color plasma display image of claim 1 is characterized in that device comprises:
First finger, this finger is used to export the information of searching to second finger according to the raw data of input, comprises should search in second finger a certain table and the address information in this table;
Second finger is provided with many tables in this finger, every table includes under a fixed son vector, can realize a kind of sub-field code mode of brightness degree to all; Be used under certain son vector, realize in the brightness degree searching or searching less than the number of sub-field code of maximum sub-field code numbers being arranged, and output being to the multiple sub-field code mode of a certain brightness degree;
The separate data layout adjustment unit of multichannel, many look-up tables in the every road and second finger are corresponding respectively, and the data of the multichannel different-format of many look-up tables outputs are adjusted into consolidation form; When data layout is adjusted, as the adjustment standard, when the data of less number output are adjusted to the output of plurality purpose, the sub-field code data duplicate allocation of significance bit is lacked on the position to data according to the output of maximum numbers;
First selector is selected corresponding circuit-switched data output according to the table information of first look-up table output from the multichannel data that multichannel data form adjustment unit is imported, wherein comprised the possible sub-field code of institute of current pixel brightness degree;
A MPD counter is used for the institute of a certain brightness degree of first look-up table output might be carried out MPD calculating with the sub-field code of having handled that faces pixel mutually by sub-field code;
A comparer will compare mutually from the MPD value of MPD counter input, select minimum MPD value, and output can indicate the coding of the sub-field code in the pairing MDP of the being input to counter of this minimum MPD value;
A selector switch might be selected the final sub-field code of a kind of conduct of correspondence to the current pixel brightness degree the sub-field code according to the output result of comparer from the institute of first selector output;
An impact damper is used for keeping in the sub-field code of having handled that faces pixel mutually, as carrying out the input that MPD calculates with the pending pixel of the next one;
First finger is connected with first selector with second finger respectively; Second finger is connected with first selector by the data layout adjustment unit, first selector is connected with second selector with the MPD counter respectively, the MPD counter is connected with second selector by comparer, and selector switch returns the input end of MPD counter by impact damper.
5. device of realizing the dynamic subfield coding method of the described color plasma display image of claim 1 is characterized in that device comprises:
A finger, be used for will input original level of luminance data and sub-field code from the processed pixels of impact damper output form the address information of this finger jointly; The output of this finger is as the final sub-field code to the current pixel brightness degree;
An impact damper that links to each other with finger is used for the temporary sub-field code of having handled that faces pixel mutually, as carrying out the input that MPD calculates with the pending pixel of the next one.
6. device as claimed in claim 5 is characterized in that, described finger comprises following content:
Under a stator field vector, the institute of a certain sub-field code and a certain brightness degree might be carried out MPD calculating respectively by sub-field code, select the sub-field code of pairing this brightness degree of minimum MPD value, with this sub-field code as when handling the best sub-field code that faces pixel this brightness degree X when adopting sub-field code A mutually;
This sub-field code is stored in this brightness degree and the common address that forms of sub-field code; Realize that promptly the best sub-field code of brightness degree is the sub-field code in this address when the treated pixel of facing mutually when adopting sub-field code
With might sub-field code and the institute of all brightness degrees might encode and carry out MPD respectively and calculate, when selecting different coding respectively for different brightness degree, the sub-field code of pairing this brightness degree of minimum MPD value is stored in the correspondence position of finger respectively;
For the son of a having selected vector, suppose and to realize that the brightness degree number is N, the number of all possible coded system is M, then should have N*M address location to represent this N*M kind situation in finger, the combination between promptly different sub-field code modes and the different brightness degree.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009052724A1 (en) * | 2007-10-23 | 2009-04-30 | Nanjing Huaxian High Technology Co., Ltd. | Method and apparatus for reducing dynamic false contour outline phenomenon of plasma planar display |
| CN101951490A (en) * | 2009-12-31 | 2011-01-19 | 四川虹欧显示器件有限公司 | Method, device and plasma display for improving image display quality |
| CN101441849B (en) * | 2007-11-23 | 2012-02-29 | 四川虹欧显示器件有限公司 | Method and system for reducing image dynamic pseudo-contour of AC-PDP |
| CN102449682A (en) * | 2009-05-29 | 2012-05-09 | 全球Oled科技有限责任公司 | Display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3417246B2 (en) * | 1996-09-25 | 2003-06-16 | 日本電気株式会社 | Gradation display method |
| US5841413A (en) * | 1997-06-13 | 1998-11-24 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for moving pixel distortion removal for a plasma display panel using minimum MPD distance code |
| JP2994633B2 (en) * | 1997-12-10 | 1999-12-27 | 松下電器産業株式会社 | Pseudo-contour noise detection device and display device using the same |
| US6100863A (en) * | 1998-03-31 | 2000-08-08 | Matsushita Electric Industrial Co., Ltd. | Motion pixel distortion reduction for digital display devices using dynamic programming coding |
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2005
- 2005-10-14 CN CNB2005100961599A patent/CN100378775C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009052724A1 (en) * | 2007-10-23 | 2009-04-30 | Nanjing Huaxian High Technology Co., Ltd. | Method and apparatus for reducing dynamic false contour outline phenomenon of plasma planar display |
| CN101441849B (en) * | 2007-11-23 | 2012-02-29 | 四川虹欧显示器件有限公司 | Method and system for reducing image dynamic pseudo-contour of AC-PDP |
| CN102449682A (en) * | 2009-05-29 | 2012-05-09 | 全球Oled科技有限责任公司 | Display device |
| CN102449682B (en) * | 2009-05-29 | 2015-02-11 | 全球Oled科技有限责任公司 | Display device |
| CN101951490A (en) * | 2009-12-31 | 2011-01-19 | 四川虹欧显示器件有限公司 | Method, device and plasma display for improving image display quality |
| CN101951490B (en) * | 2009-12-31 | 2012-09-05 | 四川虹欧显示器件有限公司 | Method, device and plasma display for improving image display quality |
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| CN100378775C (en) | 2008-04-02 |
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