CN100539634C

CN100539634C - Picture display device and display method thereof

Info

Publication number: CN100539634C
Application number: CNB2006100776944A
Authority: CN
Inventors: 林嘉亮; 周智贤
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2006-04-28
Filing date: 2006-04-28
Publication date: 2009-09-09
Anticipated expiration: 2026-04-28
Also published as: CN101064769A

Abstract

The present invention discloses a video display system for alleviating the aging problem caused by the inactive area of the output image. When the video display system displays an image with a different aspect ratio than the screen image, the image only extends to the active area of the display image. The display system sets the brightness and/or chromaticity of the pixels in the inactive area to match the average brightness and/or average chromaticity of the selected pixels in the active area. This makes the aging rate of phosphors or other materials in the active area and the inactive area the same to prevent ghosting.

Description

A kind of picture display device and display packing thereof

Technical field

The invention relates to the system that a kind of picture shows, particularly relevant for a kind of prevent to export use the zone to produce the display system of the problem of aging that produces in the picture.

Background technology

See also Fig. 1, it illustrates hd-tv, and (high definition television, HDTV) picture that reflects of screen display one 16:9 aspect ratio (width is than height) looks like.And Fig. 2 illustrates the picture of drawing that reflects that old type video screen shows 4:3 aspect ratio (width is than height).Because the most picture that reflects still continues to use traditional 4:3 aspect ratio, therefore how to handle the 4:3 ratio and reflect the compensation of picture and on the HDTV of 16:9 ratio screen, be shown as a thing anxious to be solved.

See also Fig. 3, it illustrates a kind of solution, the picture shadow that reflects of 4:3 ratio is drawn horizontal-extending filling up the viewing area of 16:9 ratio, but can cause image fault.Another solution is that the top of reflecting picture shadow picture of 4:3 ratio and/or bottom are excised to fill up the viewing area of 16:9 ratio, as shown in Figure 4, but can cause the parts of images loss.Another kind of solution commonly used as shown in Figure 5, correct 4:3 scaled image is shown in 16:9 ratio screen " initiatively " zone 12, and the left area 10 and the zone, the right 11 of reservation active area 12 is not used.Obsolete regional 10 and 11 are shown as white usually, as shown in Figure 5, or are shown as black, as shown in Figure 6, or appear dimmed.In addition, when the HDTV screen is realized with the CRT technology, if allow

zone

10 and 11 long-time no changes show, then cause electron beam to continue the phosphor pixel of same position on the bump screen, make these pixels compare brightness significantly with the pixel of active area at last and reduce many." phosphor burn-in " do not using

zone

10 and 11 to produce permanent " ghost " phenomenons, and watching reflecting the picture content and can obviously perceiving of 16:9 ratio.

Similar problem also occurs in the CRT personal computer screen.Show unconverted image when screen is long-time, cause the CRT screen to produce " phosphor branding (burn-in) " phenomenon.Be head it off, when detecting the image no change of screen display in a period of time, screen saver just can show that on screen one moves pattern.When screen display moves image, electron beam will sporadicly reach the pixel of clashing into randomly on each screen, relax screen aging (aging) by this and avoid ghost phenomenon (ghosting).

Therefore, a kind ofly can not cause the picture distortion, can not destroy non-active area picture esthetic sense and not need extra detector,, press at present in order to relax the aging system of non-active area phosphor.

Summary of the invention

When an input picture and screen proportion not simultaneously, this reflects the picture display system when needing that input picture is shown to " initiatively (active) " zone of output image and producing " non-active (inactive) " zone in the output image, originally reflect picture display system system and handle the lightness of this active area and/or the pixel data of colourity, the average lightness and/or the average chrominance of selected pixel with the decision active area, and set the lightness and/or the colourity of pixel of the non-active area of display frame according to the function of this average lightness and/or average chrominance, make the lightness and/or the colourity of pixel of non-active area similar to the average lightness and/or the average chrominance of active area, the rate of ageing that prevents the phosphor of the pixel in active area and the non-active area or other material by this is identical, to prevent the ghost phenomenon.

According to an aspect of the present invention, provide a kind of picture display process, comprised: receive the input picture, wherein this input picture comprises a plurality of pixels; According to computing function, calculate the lightness of these a plurality of pixels and at least one in the colourity, to produce estimated value; According to this estimated value, produce and calculate picture; And merge this input picture and this calculating picture and export picture; Wherein, this input picture is the active area that is positioned at this output picture, and this calculating picture is the non-active area that is positioned at this output picture.

According to another aspect of the present invention, also provide a kind of picture display device, comprised: filter unit is used for receiving the input picture to produce the filtering picture; Wherein this filtering picture is one of lightness picture and colourity picture; Computing unit is used for calculating a plurality of pixels in this filtering picture, and produces the calculating picture; And merge cells, be used for merging this filtering picture and this calculating picture, and export picture; Wherein, this filtering picture is the active area that is positioned at this output picture, and this calculating picture is the non-active area that is positioned at this output picture.

According to another aspect of the present invention, a kind of production method that reflects the continuous frame page or leaf of picture demonstration also is provided, those frame pages or leaves are first pixel datas of correspondence image, and each those frame page or leaf comprises the formed active area of a plurality of first pixels of this image and is positioned at a plurality of second pixels outside this active area, wherein this first pixel data means the lightness and/or the colourity of each those first pixel of showing those continuous frame pages or leaves, for each particular frame page or leaf of those continuous frame pages or leaves, this production method comprises: handle the first estimation intensity of this first pixel data with the one of the lightness that determines selected first sets of pixels in those first pixels and colourity; Produce second pixel data, this second pixel data is in order to the lightness and/or the colourity of those second pixels of indicating this particular frame page or leaf, and wherein the one of the lightness of those second pixels of each of this particular frame page or leaf and colourity is the function of this first estimation intensity; Set the lightness of those first pixels of this particular frame page or leaf and/or colourity to the indicated intensity of this first pixel data; And set the lightness of those second pixels of this particular frame page or leaf and/or colourity to the indicated intensity of this second pixel data.

Description of drawings

Fig. 1～Fig. 6 illustrates multiple known display frame of reflecting the picture display system;

Fig. 7 is the display frame of reflecting the picture system that illustrates embodiments of the invention;

Fig. 8 is the schematic diagram that illustrates the pixel lightness of same row shown in Figure 7;

Fig. 9 is the display frame of reflecting the picture system that illustrates another embodiment of the present invention;

Figure 10 is the schematic diagram of the pixel lightness of same row shown in Figure 9;

Figure 11 is the calcspar that reflects the picture system of embodiments of the invention;

Figure 12 is the rough schematic view that reflects picture display frame pixel;

Figure 13 and Figure 14 are the calcspar of enforcement example of the filter of Figure 11;

Figure 15 is the schematic diagram of pixel of same row of the display frame of Fig. 9;

Figure 16 and Figure 17 are the calcspar of enforcement example of the filter of Figure 11;

Figure 18 illustrates the calcspar that reflects another example of picture display system of the present invention.

[main element symbol description]

10,11: non-active picture area;

12: active area;

13,14: the zone boundary;

20: reflect the picture system;

22: screen;

24: analog-digital converter;

25: active area;

27,29: non-active area.

Embodiment

In general, reflect the picture signal and can be divided into a lightness composition (luminance component) and a colourity composition (chrominance component), this reflects the picture signal and is convertible into two pixel data sequences (pixeldata sequence), is respectively lightness composition pixel data sequence and colourity composition pixel data sequence.Be different from the prior art is that pixel with non-active area is set at constant color and brightness, display system of the present invention is according to the pixel data sequence of active area, to produce additional pixel data, utilize this additional pixel data to adjust the lightness and the colourity of the pixel of non-active area, make the lightness of each pixel of

non-active area

10 and 11 can prevent phosphor or other pixel material aging inequality of active area and non-active area by this near the lightness mean value of the selected pixel of active area.

One embodiment of the invention are the pixel data that utilizes in the active area, calculate extra pixel data and set pixel lightness/chromatic value in the non-active area, make it near selected pixel lightness/colourity mean value in the active area.As shown in Figure 7,

non-active area

10 and 11 pixel system periodically adjusts its lightness and colourity with average lightness and average chrominance near selected pixel in the active area 12.In addition, according to an alternate embodiment of the present invention, second pixel data (active area calculates extra pixel data) also can only be set the lightness of

non-active area

10 and 11, chrominance section then is set at a constant, irrelevant with the pixel colourity of active area, perhaps only set colourity, lightness then is set at a constant, and is irrelevant with the pixel lightness of active area.See also Fig. 8, it illustrates the pixel lightness L on the same horizontal row of display frame of Fig. 7, and pixel lightness L is the function of picture X-axis.Non-active area 10 and 11 (0 and XL between and between XR and the XMAX) the pixel lightness be the average lightness LM of the selected pixel of active area 12.The pixel lightness system of active area 12 (between XL and the XR) is controlled by reflecting the picture signal.Similarly,

non-active area

10 and 11 pixel colourity are all consistent at any time, and all are set at the average chrominance of the selected pixel of active area.In an embodiment of the present invention, the average lightness of active area 12 and average chrominance system is according in the active area 12 near N frame page or leaf of this picture, the lightness of representative pixels sampled or colourity average (mean) calculate, and N equals 1 or greater than 1.Representative pixels sampled is made up of i pixel of the row of the j in the active area, and i and j are the integer greater than 0.In another embodiment of the present invention, can other method select in order to the pixel of calculating average lightness or average chrominance in the active area 12.For example select the pixel of all active area 12, or only select in the active area pixel near non-active area 10 and 11.In addition, the lightness that can selected pixel or the mediant (median) of colourity or mode (mode) are as the average lightness or the average chrominance of selected pixel.

In another embodiment of the present invention, as shown in Figure 9, the sharp keen phenomenon (sharpness) on the active area of picture and the border of non-active area can reduce by the lightness that changes the pixel in

non-active area

10 and 11 gradually, as shown in figure 10.Among Figure 10, in zone 10 and 11 (between X1 and the XL and between XR and the X2), set near the pixel lightness system of the position XL of active area 12 and XR similar to the lightness LK of active area border 13 and 14, and away from active area (0 to X1 between and between X2 and the XMAX) the lightness of pixel be set similar to the average lightness of all pixels of regional 12.Between X1 and the XL and between XR and the X2, the pixel lightness is linear the change along with the variable in distance of LM and LK.Lightness by

non-active area

10 and 11 changes gradually, can reduce that brightness changes loftyly between the active area of picture and the non-active area.The width that reaches between XR and the X2 between X1 and the XL can optionally be adjusted.In Figure 10, between X1 and the XL and the lightness transformation series between XR and the X2 meet the linear function of a distance, also other function of available range is as the quadratic power function.

See also Figure 11, this figure is an exemplary block diagram of reflecting picture system 20 of the present invention.The ratio of reflecting the image scaled of picture signal and screen 22 when input is not simultaneously, for example working as screen 22 is the 16:9 ratio, and reflect the image that the picture signal transmits a 4:3 ratio, in the case, screen 22 provides a picture, and this picture has the K row, and each shows N+2M pixel, as shown in figure 12, and (N+2M): K=16:9.And the image of the 4:3 ratio that the VIDEO signal is transmitted system is shown in the active area NxK of picture, and N:K=4:3.When reflecting picture system 20 when producing images in active area 25, also periodically adjust the lightness and the colourity of the pixel of two non-active area 27 of MxK and 29, produce aging and prevent the ghost phenomenon to relax these zones.

Reflect picture system 20 and comprise an analog-digital converter (A/D) 24, it is signal digitalized to produce a digit data sequence D1 that it will export VIDEO.One comb filter 26 (comb filter), a colourity filter 28 (chroma filter) and a briliancy filter 23 (luma filter) convert data sequence D1 to two pixel data sequence CA and YA.CA and YA data sequence continuous each key element is all defined the lightness and the colourity of the pixel in the active area 25.If image system is shown in the picture of 4:3 ratio, then filter 28 and 23 need periodically produce data sequence CA and YA with a speed, if image system is shown in the picture of 16:9 ratio, then data sequence CA and YA need paragraph ground to produce (burst).For example, when display 22 is a CRT monitor, electron beam is inswept one when having the row of N+2M pixel, and this N pixel only just needs during the N in electron beam scanning to active area pixel, does not need data sequence CA and YA during to 2M pixel of

non-active area

27 and 29 at electron beam scanning.Ratio corrector (aspect ratio corrector) circuit 32 comprises first-in first-out buffer (FIFO buffer), it stores according to the generation speed of the colourity briliancy filter key element with data sequence CA and YA, and when electron beam scanning arrives active area, data sequence CA and YA are exported, in addition, reflect picture system 20 and comprise a pair of

digital filter

30 and 31, its processing sequence C A and YA are to produce extra lightness and chroma pixel data sequence CB and YB, when electron beam scanning arrives

non-active area

27 and 29, sequence C B and YB will be output to screen.Multiplexer 34 is to be used for control signal according to a sequential circuit 38, optionally export CB, CM, pixel to the one RGB transducer 36 of YM and YB, when electron beam scanning arrives

non-active area

27 and 29, the key element of multiplexer 34 transfer sequence CB and YB to RGB transducer 36 is imported data C as lightness input data Y and colourity, in like manner, when electron beam scanning arrives active area 25, the key element of multiplexer 34 transfer sequence CM and YM to RGB transducer 36 is imported data C as lightness input data Y and colourity, that is to say, the purpose of this multiplexer is input picture (CM, CY) with the calculating picture (CB that is calculated, YB) do combination.In addition, RGB transducer 36 is to be used for converting sequence C and Y to rgb signal, with the brightness of redness, green and the blue pixel of adjusting electron beam scanning CRT22 picture.One sequential circuit 38 provides clock signal with

control device

23,24,26,28,30-32,36 and the operating clock of deflection circuit (deflection circuit) 39, deflection circuit 39 is the position of controlling electron beam, and conventional synchronization circuit 40 is to handle the clock signal that the VIDEO signal is produced with synchronizing sequential circuit 38.

" the frame page or leaf " that be shown in display 22 is the rest image of one single (2M+N) xK pixel (frame), and reflect picture system 20 many frame pages or leaves is updated periodically the NxK part of the display image of active area 25, produces one by this and moves image.Simultaneously, reflecting picture system 20, also to upgrade the demonstration of

non-active area

27 and 29 aging to relax.According to embodiments of the invention, filter 30 calculates previous F and opens in the frame page or leaf, the key element mean value of selected pixel sequence CA (average of values of elements) makes that as each key element value of sequence C B the pixel in

non-active area

27 and 29 has identical colourity mean value with the pixel that previous F opens in the frame page or leaf.In various embodiments of the present invention, filter 30 can be with different pixel selecting methods, for example selected pixel can be in the active area that representative pixels sampled in the active area that all pixels, F in the active area that F opens the frame page or leaf open the frame page or leaf or F open the frame page or leaf near the partial pixel of non-active area, calculates its mean, mediant or mode.

See also Figure 13, this figure is an embodiment of filter 30, can use an accumulator (ACCUM) 50 key elements with the selected sequence C A that adds up, 52 pairs of selected sequence C A key element accumulated values of one division circuit carry out gain controlling, to produce according to the CB data, and when next CB data were calculated, buffer (REG) 54 was temporary last CB data.According to timing signal generator 38 shown in Figure 11 is to produce clock signal to inform the key element of the CA sequence that accumulator 50 need add up and division circuit is carried out sequencing control, another clock signal, indicate the position of beginning of opening of each frame page or leaf, and reset accumulator 50 and buffer 54 is carried out sequencing control.During F opened the frame page or leaf, each pixel of CB pixel data sequence had same intensity, was the pixel average of selected CA pixel data sequence.Therefore, during F opened the frame page or leaf,

non-active area

27 and 29 pixel colourity were all consistent, and equaled the speed average of selected pixel in the active area 25 that previous F opens the frame page or leaf.See also the embodiment of Figure 14, comprise accumulator 56, division circuit 58 and buffer 60, be used for the YA pixel data of treatment of selected to produce the YB data, its operating principle is equal to Figure 13, so do not give unnecessary details in addition at this.

See also Figure 15, this figure is in the picture shown in Figure 12, one array of pixels 66, according to embodiments of the invention 20, filter 30 is to be used for calculating the right pixels 64 of active area 25 in zone 29, between A the location of pixels, the brightness value CB (A) of pixel 62, and the leftmost pixel 72 of calculating active area 25 is in zone 27, between B the location of pixels, the brightness value CB (B) of pixel 70, filter 30 bases array function are down calculated:

CB(A)＝(CB’-CBR(0)’)(A/A _max) ^T1+CBR(0)，for?A<A _max

CB(A)＝CB’for?A>＝A _max

CB(B)＝(CB’-CBL(0))(B/B _max) ^T1+CBL(0)，for?B<B _max

CB(B)＝CB’for?B>＝B _max

A wherein _MaxBe the distance that right hand edge to the colourity of active area changes gradually, CBR (0) is the up-to-date decision colourity of pixel 64 of the right hand edge of active area 25, and CB ' is the average chrominance of the selected pixel in the active area of latest computed.B _MaxBe the distance that left hand edge to the colourity of active area changes gradually, CBL (0) is the up-to-date decision colourity of pixel 72 of the left hand edge of active area 25, and T1 is any greater than 0 number.

For example, T1 is set at 2, causes along with A is increased to A by 0 _Max, and B is increased to B by 0 _Max, the chrominance C B (L) and the CB (R) in

zone

29 and 27 change to CB ' gradually by CBR (0) and CBL (0) quadratic power ground (quadradically).T1 is set at 1, causes along with A is increased to A by 0 _Max, and B is increased to B by 0 _Max, the chrominance C B (L) and the CB (R) in

zone

29 and 27 change to CB ' linearly gradually by CBR (0) and CBL (0).CB ' can be mean, mediant or the mode of the selected pixel in the active area.

See also Figure 16, this figure provides a filter 30 of passing the colourity of far successively decreasing to comprise accumulator (ACCUM) 50, division circuit 52 and buffer (REG) 54.Filter 30 is the colourity average CB ' that calculates the pixel in the active area 25 that continuous F opens the frame page or leaf.Comprise a pair of buffer (REG) 74 and 76 storing the nearest values of CBR (0) and CBL (0) at this example median filter 30, the filter that successively decreases (taperingfilter) 78 receives CB ', BR (0) and CBL (0) and calculates CB (L) according to the above-mentioned decreasing function far away (tapering function) of passing.The clock signal (TIMING SIGNALS) that sequence circuit 38 shown in Figure 11 is produced carries out sequencing control to buffer 74 and 76, makes that these a little buffers can store it when CBR (0) and CBL (0) come across sequence C A.Clock signal also carries out sequencing control producing each CB value to the filter circuit 84 that successively decreases, and causes the filter 78 that successively decreases can learn the location of pixels of present calculating CB value synchronously to the filter 78 that successively decreases.

As shown in figure 11, in arbitrary row 66 of filter of the present invention 31 zonings 29, from the right hand edge of active area 25, the lightness YB (A) of A position pixel 62, and in arbitrary row 66 of zoning 27, from the left hand edge of active area 25, the lightness YB (B) of B position pixel 62.Filter 31 bases array function are down calculated:

YB(A)＝(YB’-YBR(0)’)(A/A _max) ^T1+YBR(0)，for?A<A _max

YB(A)＝YB’for?A>＝A _max

YB(B)＝(YB’-YBL(0))(B/B _max) ^T1+YBL(0)，for?B<B _max

YB(B)＝YB’for?B>＝B _max

Wherein, A _MaxBe the distance that right hand edge to the colourity of active area changes gradually, YBR (0) is the up-to-date decision colourity of pixel 64 of the right hand edge of active area 25, and YB ' is the average chrominance of the selected pixel in the active area of latest computed.B _MaxBe the distance that left hand edge to the colourity of active area changes gradually, YBL (0) is the up-to-date decision colourity of pixel 72 of the left hand edge of active area 25, and T2 is any greater than 0 number.

For example, T2 is set at 2, causes along with A is incremented to A by 0 _Max, and B is incremented to B by 0 _Max, the lightness YB (L) and the YB (R) in

zone

29 and 27 change to YB ' gradually by YBR (0) and YBL (0) quadratic power ground (quadradically).T2 is set at 1, causes along with A is incremented to A by 0 _Max, and B is incremented to B by 0 _Max, the lightness YB (L) and the YB (R) in

zone

29 and 27 change to YB ' linearly gradually by YBR (0) and YBL (0).YB ' can be mean, mediant or the mode of the selected pixel in the active area, and can optionally use multiple different pixel selection mode.

See also Figure 17, provide a filter 31 of passing the lightness of far successively decreasing to comprise accumulator 56, division circuit 58 and buffer 60 among the figure.Filter 31 is the lightness average YB ' that calculates the pixel in the active area 25 that continuous F opens the frame page or leaf.Comprise a pair of buffer 80 and 83 storing the nearest values of YBR (0) and YBL (0) at this example median filter 31, the filter that successively decreases (tapering filter) 78 receives YB ', YBR (0) and YBL (0) and calculates YB (L) according to the above-mentioned decreasing function far away (tapering function) of passing.The clock signal that sequence circuit 38 shown in Figure 11 is produced carries out sequencing control to buffer 80 and 82, makes buffer to store YBR (0) and YBL (0) in appropriate time.Clock signal also carries out sequencing control producing each YB value to the filter circuit 84 that successively decreases, and causes the filter 78 that successively decreases can learn the location of pixels of present calculating YB value synchronously to the filter circuit 84 that successively decreases.

See also Figure 18, it illustrates the schematic diagram of another embodiment of the present invention.Among the figure, it is similar with the picture display system 20 of reflecting shown in Figure 11 to reflect picture display system 90, except reflecting that picture display system 90 removes filter 30 and chrominance C B system connects (or obtain from buffer) with hardware and is a constant.The colourity system of the pixel of the non-active area of reflecting display frame is set at constant, and its lightness changes along with the pixel lightness in the active area.For example, the pixel of non-active area can be grey and its brightness changes along with the estimation mean flow rate of the selected pixel of active area.

The above only is an illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and, all should be contained in the accompanying Claim scope its equivalent modifications of carrying out or change.

Claims

1. A screen display method, comprising:

receiving an input frame, wherein the input frame includes a plurality of pixels;

calculating at least one of lightness and chroma of the plurality of pixels according to a calculation function to generate an estimated value;

generating a calculation screen based on the estimated value; and

combining the input screen and the calculation screen and outputting an output screen;

Wherein, the input screen is located in the active area of the output screen, and the calculation screen is located in the non-active area of the output screen.

2. The image display method according to claim 1, wherein the plurality of pixels are all pixels of the input image.

3. The image display method according to claim 1, wherein the plurality of pixels are edge pixels of the input image.

4. The image display method according to claim 1, wherein the plurality of pixels are representative sampling pixels of the input image.

5. The image display method according to claim 1, wherein the estimated value is an average of the plurality of pixels.

6. The frame display method according to claim 1, wherein the estimated value is an intermediate number of the plurality of pixels.

7. The image display method according to claim 1, wherein the estimated value is a mode of the plurality of pixels.

8. The image display method according to claim 1, wherein the output image has an aspect ratio substantially equal to 16:9.

9. A screen display device, comprising:

a filtering unit, configured to receive an input image to generate a filtered image; wherein the filtered image is one of a luma image and a chroma image;

a calculation unit, used to calculate a plurality of pixels in the filtered picture, and generate a calculation picture; and

a merging unit, used to combine the filter picture and the calculation picture, and output an output picture;

Wherein, the filtering picture is located in the active area of the output picture, and the calculation picture is located in the non-active area of the output picture.

10. The picture display device according to claim 9, wherein the calculating unit comprises:

a filter, used to calculate a plurality of pixels in the filter picture according to a calculation function, and generate the calculation picture; and

A proportional scaling unit, configured to scale the filtered picture and generate a scaled picture.

11. The picture display device according to claim 9, wherein the plurality of pixels are edge pixels of the filtered picture.

12. The picture display device according to claim 9, wherein the plurality of pixels are representative sampling pixels of the filtered picture.

13. The picture display device according to claim 9, wherein the calculating unit calculates an average number of pixels in the filtered picture.

14. The picture display device according to claim 9, wherein the calculating unit calculates a median number of pixels in the filtered picture.

15. The picture display device according to claim 9, wherein the calculation unit calculates the mode of the plurality of pixels in the filtered picture.

16. A method for generating continuous frame pages displayed in a movie, the frame pages are the first pixel data corresponding to the image, and each of the frame pages includes an active area formed by a plurality of first pixels of the image and located at A plurality of second pixels outside the active area, wherein the first pixel data indicates the brightness and/or chroma of each of the first pixels of the consecutive frame pages, for each specific one of the consecutive frame pages Frame page, the generation method contains:

processing the first pixel data to determine a first estimated intensity of one of luma and chroma of a selected first group of pixels among the first pixels;

generating second pixel data, the second pixel data is used to indicate the lightness and/or chroma of the second pixels of the specific frame page, wherein the lightness and chroma of each of the second pixels of the specific frame page one of is a function of the first estimated strength;

setting the lightness and/or chroma of the first pixels of the specific frame page to the intensity indicated by the first pixel data; and

Setting the lightness and/or chroma of the second pixels of the specific frame page to the intensity indicated by the second pixel data.