KR100590326B1 - Image processing apparatus and method for plasma display panel - Google Patents

Abstract

The present invention relates to an image processing apparatus and method of a plasma display panel which improves image processing efficiency by reducing the use of memory by improving a method of discriminating still images and moving images. The present invention relates to a CRC value and a current frame of image data of a previous frame. By comparing the CRC values of the image data, it is determined whether the image of the current frame is a still image or a moving image to reduce the use of the memory unit in the image processing process, thereby increasing the efficiency of the image processing.

In order to achieve the above object, the present invention provides a motion detection unit configured to generate a CRC value of image data by performing CRC (Cyclic Redundancy Check) operation from external image data, and to determine whether the current frame is a video using the generated CRC value. And an image processor for image processing the image data of the current frame and a subfield mapping unit for subfield mapping the image data processed by the image processor according to the result determined by the motion detection unit.

Plasma Display Panel, Video, Still Image, CRC Operation, Image Data

Description

Image Processing Apparatus and Method for Plasma Display Panel

1 is a view showing the structure of a typical plasma display panel.

2 is a diagram illustrating a method of expressing image gradation of a conventional plasma display panel.

3 is a view for explaining a conventional image processing method.

4 is a view showing an image processing apparatus of a plasma display panel of the present invention.

5 is a view for explaining an operation of the motion detection unit of FIG. 4.

6 is a view for explaining an image processing method of the plasma display panel of the present invention.

<Explanation of symbols for the main parts of the drawings>

400: motion detection unit 401: image processing unit

402: subfield mapping unit 403: data alignment unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to an apparatus and method for processing a plasma display panel, which improves image processing efficiency by reducing the use of memory by improving a method for discriminating still images and moving images.

In general, a plasma display panel is a partition wall formed between a front substrate and a rear substrate to form a unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel.

As shown in FIG. 1, a plasma display panel includes a front substrate in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are formed on a front glass 101, which is a display surface on which an image is displayed. The rear substrate 110 having the plurality of address electrodes 113 arranged to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is coupled in parallel with a predetermined distance therebetween. .

The front substrate 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. Scan electrode 102 and sustain electrode 103 are covered by one or more dielectric layers 104 that limit discharge current and insulate between electrode pairs, and to facilitate discharge conditions on top of upper dielectric layer 104. A protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear substrate 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112. On the upper side of the rear substrate 110, R, G, and B phosphors 114 which emit visible light for image display during address discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

A method of expressing an image gray level of a plasma display panel having such a structure will be described with reference to FIG. 2.

2 is a diagram illustrating a method of implementing image grayscale of a conventional plasma display panel.

As shown in FIG. 2, in the conventional method of expressing a gray level in a plasma display panel, a frame is divided into several subfields having different number of emission times, and each subfield is again configured as a reset period (RPD) for initializing all cells. ) Is divided into an address period APD for selecting a cell to be discharged and a sustain period SPD for implementing gradation according to the number of discharges. For example, when displaying an image with 256 gray levels, a frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8 as shown in FIG. Each of the fields SF1 to SF8 is divided into a reset period, an address period, and a sustain period.

The reset period and the address period of each subfield are the same for each subfield. The address discharge for selecting the cell to be discharged is caused by the voltage difference between the address electrode and the transparent electrode which is the scan electrode. The sustain period is increased at a rate of 2 ⁿ ( ^where n = 0, 1, 2, 3, 4, 5, 6, 7) in each subfield. In this way, since the sustain period is different in each subfield, the gray scale of the image is expressed by adjusting the sustain period of each subfield, that is, the number of sustain discharges.

In this way, a plurality of frames are implemented. In such a frame, if the image data values of one frame and the next frame are the same, the image is divided into still images. If the image data values of one frame and the next frame are different from each other, the image data is divided into moving images. When the still image and the moving image are processed by the same image processing method, there is a problem that the image quality of any one image is deteriorated. For example, when image processing is performed by the same predetermined image processing method of a still image and a moving image, the image quality of the moving image is clearly implemented, while a still image causes a problem of deterioration such as shaking due to noise.

Accordingly, the plasma display panel generally improves image quality by processing a moving image and a still image in different ways.

As described above, in order to separate still images from moving images and to be damaged by different image processing methods, still images and moving images must be clearly distinguished. In order to distinguish a still image from a moving image, a difference between the image data value of the previous frame and the image data value of the current frame is compared with the image data value of the previous frame within a predetermined threshold. Based on the recognition, the still image and the video were classified. The conventional image discrimination method will be described with reference to FIG. 3.

3 is a view for explaining a conventional image processing method.

As shown in FIG. 3, a conventional image processing method generally includes a plurality of regions a, b, c, d, e, f, g, of a predetermined size, on the display surface 300 of a plasma display panel. h, i). The image data values of one frame of the plurality of selected regions are determined and stored in a predetermined memory unit (not shown).

Subsequently, when the image data of the next frame is input, the area A of the plasma display panel 300 corresponding to the plurality of areas a, b, c, d, e, f, g, h, and i as described above. B, C, D, E, F, G, H, I) are selected, and the video data value per frame of the plurality of selected areas is determined. The image data values thus determined are compared for each area to determine whether they are the same. For example, it is determined whether the image data value of the area A and the image data value of the area a are equal to each other, and whether the image data value of the area B and the image data value of the area b is compared to each other to determine whether or not it is the same. In this way, the data values of regions C and c, D and d, E and e, F and f, G and g, H and h, and I and i are respectively different. By comparison, it is determined whether they are identical by area. Although the area A and the area A are illustrated and described herein, the area A and the area A are substantially the same.

As described above, when determining whether the image data values of the plurality of areas of the plurality of areas on the plasma display panel 300 are the same, for example, each red (R), green (G), By determining whether each of the R, G, and B image data among the blue (B) discharge cells is the same, it is possible to determine whether they are the same for each region.

As described above, after determining whether each area is the same, it is determined whether the current frame is a moving picture or a still picture by comparing with a predetermined threshold. For example, it is assumed that up to two threshold values are allowed. Here, the image data values of the A and a regions, the image data values of the B and b regions, the image data values of the C and c regions, the image data values of the D and d regions, and the image data of the E and e regions Value, the image data values of the F and F regions, the image data values of the G and g regions, and the image data values of the H and h regions are all the same, except that only the image data values of the I and i regions are different. In this case, it is determined that the image of the current frame is a still image. Similarly, assuming that the image data values in the H and h regions are different, the image data values in the I and i regions are different, and the rest have the same image data values in each region, the image of the current frame is called a movie. To judge.

However, such an image processing method should store all image data values in each memory in each memory area. For example, when all the image data values of each region of one previous frame are stored in a memory unit (not shown), and then the image data of the next frame is input, each region of the previous frame stored in the memory unit (not shown) The image data value of each region is read out and compared with the image data value of the current frame to determine whether the image data value of each region is the same. Accordingly, the weight of the resources of the plasma display panel, that is, the memory unit (not shown), occupied by the image data values for determining the still image and the moving image increases. If the video data values for comparison increase significantly, there is a possibility that another external memory unit (not shown) is mounted.

As described above, in the conventional image processing method of the plasma display panel, there is a problem in that the efficiency of the entire image processing is reduced by increasing the weight of the memory unit occupied by the image data for distinguishing the still image from the moving image.

In order to solve this problem, the present invention provides an image processing apparatus and method for a plasma display panel which improves image processing efficiency by reducing a resource usage ratio of the plasma display panel by improving a method of distinguishing a still image from a video. have.

In order to achieve the above object, the present invention provides a motion detection unit configured to generate a CRC value of image data by performing CRC (Cyclic Redundancy Check) operation from external image data, and to determine whether the current frame is a video using the generated CRC value. And an image processing unit for image processing the image data of the current frame and a subfield mapping unit for subfield mapping the image data processed by the image processing unit according to the result determined by the motion detection unit.

Here, the motion detection unit may further include an internal memory unit for storing the CRC value of the image data of the previous frame.

The motion detection unit may compare the CRC value of the image data of the previous frame with the CRC value of the image data of the current frame to determine whether the image data of the current frame is a moving image or a still image.

In addition, when the motion detection unit determines whether the image data of the current frame is a video or a still image, the display surface of the plasma display panel is divided into a plurality of regions having a predetermined size, and the image of the previous frame and the current frame is divided for each of the plurality of regions. CRC operation of each region to generate CRC values of the image data of a plurality of regions, respectively, CRC value of each region of the image data of the previous frame and CRC value of each region of the image data of the current frame by comparing the image of the current frame And determining whether the data is a moving picture or a still picture.

In addition, the motion detection unit compares the CRC value of each region of the image data of the previous frame and the CRC value of each region of the image data of the current frame for each corresponding region, so that the previous frame and the current frame have different CRC values. When the number of times is equal to or less than a preset threshold, the image data of the current frame is determined as a still image.

The motion detection unit may generate a CRC value by performing CRC operation on the image data using the CRC 16 method.

The image processor may process the image data of the current frame through APL (Average Power Level) processing, inverse gamma correction, and halftone correction according to a result determined by the motion detection unit.

In addition, the present invention for achieving this purpose is a CRC calculation step of generating a CRC value of the image data by performing a CRC (Cyclic Redundancy Check) operation from the external image data, the CRC value of the image data generated in the CRC operation step And an image processing step of determining whether the image data of the current frame is a moving picture or a still image, and an image processing step of processing the image data according to the result determined by the image determining step.

In the CRC operation step, the display surface of the plasma display panel is divided into a plurality of regions having a predetermined size, and the CRC values of the image data of the plurality of regions are CRC calculated by performing image CRC operation on the previous frame and the current frame, respectively. It characterized in that to generate each.

In the CRC calculation step, CRC calculation is performed on image data using the CRC 16 method to generate a CRC value.

In addition, the image judging step may determine whether the image data of the current frame is a moving image or a still image by comparing the CRC value of the image data of the previous frame and the CRC value of the image data of the current frame calculated in the CRC calculation step. .

In addition, when determining whether the image data of the current frame is a moving image or a still image, the display surface of the plasma display panel is divided into a plurality of regions having a predetermined size, and the CRC of each region of the image data of the previous frame is determined. The value and the CRC value of each region of the image data of the current frame are compared to determine whether the image data of the current frame is a moving picture or a still image.

In addition, when determining whether the image data of the current frame is a still image or a moving image in the image judging step, the CRC value of each region of the image data of the previous frame and the CRC value of each region of the image data of the current frame correspond to each other. In comparison, the image data of the current frame is determined as a still image when the number of regions having different CRC values between the previous frame and the current frame is less than or equal to a preset threshold.

In the image processing step, the image data of the current frame is processed through APL (Average Power Level) processing, inverse gamma correction, and halftone correction according to the result determined in the image determination step.

Hereinafter, an image processing apparatus and method of a plasma display panel of the present invention will be described in detail with reference to the accompanying drawings.

4 is a diagram illustrating an image processing apparatus of a plasma display panel of the present invention.

As shown in FIG. 4, the image processing apparatus of the plasma display panel according to the present invention includes a motion detection unit 400, an image processing unit 401, a subfield mapping unit 402, and a data alignment unit 403. It includes.

The motion detection unit 400 detects motion from image data input from a predetermined signal processing means (eg, a video signal controller (VSC) chip (not shown)) to determine whether the current frame is a still image or a moving image. . The motion detection unit 400 may further include an internal memory unit (unsigned) for storing the CRC value of image data for each frame.

The image processor 401 processes and outputs the input image data through a predetermined image processing process such as inverse gamma correction and halftone correction according to the result determined by the motion detection unit 400 described above.

Subfield Mapping Unit 402 Subfield maps and outputs the image data processed by the image processing unit 401 described above.

The data alignment unit 403 aligns the subfield mapping data mapped by the above-described subfield mapping unit 402 for each frame according to each address electrode line.

Here, the motion detection unit 400 compares the CRC (Cyclic Redundancy Check) value of the image data of the previous frame and the CRC value of the image data of the current frame to determine the CRC value of the image data of the previous frame and the image data of the current frame. It determines whether the difference between the CRC value is within a predetermined threshold and distinguishes the still image from the moving image. The CRC method described above is a method using a pure binary code for detecting an error occurring in a data transmission process. In more detail, the CRC method divides the data into units of blocks at the transmitter side and transmits the redundant code obtained by the special calculation of the binary polynomial after each block to transmit the same cycle code by the same calculation. How to check for the presence of transmission errors. The feature of such CRC method is that the error detection capability is relatively excellent. The CRC method is applied to each image data to generate a CRC value of each image data.

Representative of such a CRC method is a method such as CRC 8, CRC 16, CRC 32, etc. Here, an example of the polynomial used in the CRC 8 is as follows.

X ⁸ + X ⁵ + X ⁴ + 1

An example of the polynomial used in CRC 16 is shown in Equation 2 below.

X ¹⁶ + X ¹⁵ + X ² + 1

The CRC value of the image data is obtained by using the CRC calculation method, and the obtained CRC value is compared with the current frame and the previous frame to determine whether the current frame is a video or a still image. In the case of obtaining the CRC value of the image data in the case of CRC 16 described above, sufficient reliability is provided because the error is small enough to be negligible as 1/2 ¹⁶ .

A method of detecting a motion by using the CRC calculation method, that is, a motion detection unit 400 that distinguishes a still image from a video, determines whether the current frame is a still image or a video, referring to FIG. Same as Herein, although the region A and the region a are different from each other as illustrated in FIG. 3, the region A and the region a are substantially the same.

Referring to FIG. 5, the motion detection unit 400 of FIG. 4 is located within a predetermined area of the display surface 500 of the arbitrarily selected plasma display panel, for example, a, b, c, d, e, f, g, h, and i areas. In CR, image data values of discharge cells (not shown) included in each area are CRC-generated to generate a predetermined CRC value. Here, it is assumed that four discharge cells are grouped into one region among the discharge cells included in the plasma display panel, that is, each of the discharge cells included in each region is assumed to correspond to each discharge cell. CRC operation is performed on the video data value. The CRC values of the image data corresponding to the respective discharge cells generated by the CRC operation are added together to generate a CRC value of one region. Here, the above-described image data value includes image information to be input to each discharge cell of the plasma display panel as a predetermined bit, for example, 8 bits of data. CRC calculation of such image data.

In this manner, CRC values are generated for predetermined regions of the display surface 500 of the plasma display panel, for example, a, b, c, d, e, f, g, h, and i regions. The area-specific CRC value thus generated is stored in a predetermined internal memory unit (unsigned). The CRC value stored in the memory unit is the CRC value of the image data of the previous frame. The CRC value stored in the internal memory unit is a CRC value of a predetermined region of the display surface 500 of the plasma display panel. In the case of CRC 16, one piece of data is 16 bits. As a result, the portion of memory occupying is significantly reduced compared to the conventional image processing method. Accordingly, the capacity of the internal memory unit included in the above-described motion detection unit 400 may be smaller than in the related art.

Subsequently, when image data of the next frame is input, for each area (A, B, C, D, E, F, G, H, I) of the display surface 500 of the plasma display panel in the same manner as described above. Each CRC operation generates a CRC value for each region.

The CRC values for each region generated as described above are compared for each corresponding region to determine whether each CRC value is the same. For example, it is determined whether the CRC value of the image data of the area A and the CRC value of the image data of the area a is equal to each other, and the CRC value of the image data of the area B and the CRC value of the image data of the area b The comparison is made to determine whether they are identical. Here, whether or not the same is to determine whether each CRC value is the same.

In this way, the CRC values of data in the C area, c area, D area and d area, E area and e area, F area and f area, G area and g area, H area and h area, and I area and i area are obtained. Compare each other to determine whether they are the same for each corresponding area. As described above, the region A and the region a are differently set and described as described above, but it is clear that the region A and the region a are substantially the same region.

After determining whether each area corresponds to each other by the above-described method, it is determined whether the current frame is a moving picture or a still picture by comparing with a predetermined threshold. For example, suppose that the threshold value is set to allow two. Here, the CRC values of the image data in the A and a regions, the CRC values of the image data in the B and b regions, the CRC values of the image data in the C and c regions, the CRC values of the image data in the D and d regions, The CRC values of the image data in the E and e regions, the CRC values of the image data in the F and f regions, the CRC values of the image data in the G and g regions, and the CRC values of the image data in the H and h regions are all the same. However, when only the CRC values of the image data of the I region and the i region are different from each other, it is determined that the image of the current frame is a still image. Similarly, it is assumed that the CRC values of the image data in the H and h regions are different, the CRC values of the image data in the I and i regions are different, and the rest have the same CRC values of the image data in each region. The video of the frame is judged to be a video. Here, the threshold as described above may be adjusted according to various variables such as the characteristics of the plasma display panel or the characteristics of the driving waveform. For example, when three or more CRC values are different for each corresponding region, the image data of the current frame may be determined as a video.

Here, when generating a CRC value of a predetermined region, a CRC value of one region may be generated by summing all CRC values of data corresponding to R, G, and B discharge cells included in each region. In contrast, each of the R discharge cells, the B discharge cells, and the G discharge cells in one region generates a total CRC value of each of the R discharge cells, a total CRC value of the B discharge cells, and a total CRC value of the G discharge cells, respectively. Three CRC values corresponding to the region may be generated. As described above, when the CRC value is generated for each of the R, G, and B discharge cells for each region, it is possible to determine a more precise video.

In this way, when the above-described motion detection unit 400 determines whether the image of the current frame is a moving picture or a still image, the motion detection unit 400 performs image processing through the subsequent image processing unit 401, and the subfield mapping unit 402 and the data alignment unit. Image data is input to the address electrode of the plasma display panel through 403.

An image processing method implemented by the image processing apparatus of the plasma display panel according to the present invention will be described with reference to FIG. 6.

6 is a view showing an image processing method of the plasma display panel of the present invention.

As shown in FIG. 6, the image processing method of the present invention first divides the plasma display panel into a plurality of regions having a predetermined size (S600).

Thereafter, it is determined whether image data of one frame is input (S601).

As a result of the above-described determination in step S601, when the image data is input, CRC calculation of the image data value of one frame for each of a plurality of regions is performed to generate CRC values for each region (S602).

After operation S602, it is determined whether the CRC value of the image data of the previous frame is stored in the internal memory unit (S603).

As a result of the determination in step S603, when there is no CRC value of the image data of the previous frame, the CRC value of the image data generated in step S602 is stored in the internal memory unit (S604). The CRC value of the image data stored in the internal memory unit is a CRC value of the image data of the current frame. After step S604, the process returns to step S601 to determine whether image data is input.

On the other hand, when there is a CRC value of the image data of the previous frame as a result of the determination in step S603, the CRC value of the image data generated in the step S602 and the CRC value of the image data of the previous frame stored in the memory unit are compared with each other. In addition, the CRC value of the image data generated in step S602 is stored in the memory unit (S605). The reason why the CRC value of the image data generated in step S602 is stored in the memory unit is to determine whether the image of the next frame is a still image or a moving image by comparing with the CRC value of the image data of the next frame.

Subsequently, it is determined whether the result of comparing the CRC value of the image data generated in step S602 and the CRC value of the image data of the previous frame stored in the internal memory unit are within a preset threshold. (S606). For example, as shown in FIG. 5, the CRC values of the respective image data of the nine regions (a, b, c, d, e, f, g, h, i) of the display surface of the preset plasma display panel correspond to the present. This is to compare whether the CRC values of the image data of the other nine areas (A, B, C, D, E, F, G, H, I) of the frame are equal to each other.

Here, in step S606, a result of comparing the CRC value of the image data generated in the above-described step S602 and the CRC value of the image data of the previous frame stored in the internal memory unit with each other is within a preset threshold value. On the contrary, whether the result of comparing the CRC value of the image data generated in step S602 and the CRC value of the image data of the previous frame stored in the memory unit with each other deviates from the preset reference value. You can also judge. When it is determined whether the result of the comparison is out of the preset reference value, it is natural that the subsequent image processing process is opposite to the case of determining whether the comparison result is within the preset reference value.

As a result of the determination in step S606, when the reference value is out of the reference value, the image of the current frame is determined as a moving image (S607). The video data of the frame determined as the moving picture is applied to subsequent image processing (S609). In other words, the current frame is recognized as a moving image, and the image data inputted through the image processing method suitable for image processing of the moving image is processed and outputted.

On the other hand, if the determination result in step S606 described above, within the reference value, it is determined that the image of the current frame as a still image (S608). The image data of the frame determined as the still image is applied to subsequent image processing (S609). That is, the current frame is recognized as a still image, and the image data input through an image processing method suitable for image processing of the still image is processed and outputted.

The image processing method of the present invention does not store all image data values for each region in a memory unit (not shown), and stores only the CRC values of the image data corresponding to each region in the internal memory unit. By comparing the CRC values of the image data for each region and distinguishing the still image from the moving image, the use of the memory unit is reduced in the image processing process, thereby increasing the image processing efficiency.

As described above, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described in detail above, the image processing apparatus and method of the plasma display panel of the present invention compares the CRC value of the image data of the previous frame with the CRC value of the image data of the current frame to determine whether the image of the current frame is a still image or a moving image. By determining and reducing the weight of the memory unit in the image processing process, there is an effect of increasing the efficiency of the image processing.

Claims (14)

A motion detection unit configured to generate a CRC value of the image data by performing a cyclic redundancy check (CRC) operation on the image data input from the outside, and determine whether the current frame is a video by using the generated CRC value; An image processor which processes the image data of the current frame according to a result determined by the motion detection unit; And A subfield mapping unit for subfield mapping image data processed by the image processing unit Image processing apparatus of the plasma display panel comprising a. The method of claim 1, The motion detection unit And an internal memory unit for storing a CRC value of image data of a previous frame. The method according to claim 1 or 2, The motion detection unit And comparing the CRC value of the image data of the previous frame with the CRC value of the image data of the current frame to determine whether the image data of the current frame is a moving image or a still image. The method of claim 3, wherein When the motion detection unit determines whether the image data of the current frame is a video or a still image, The display surface of the plasma display panel is divided into a plurality of areas having a predetermined size, CRC calculation of image data of a previous frame and a current frame for each of the plurality of regions, respectively, to generate CRC values of the image data of each of the plurality of regions; Image processing of the plasma display panel characterized by comparing the CRC value of each region of the image data of the previous frame and the CRC value of each region of the image data of the current frame to determine whether the image data of the current frame is a moving image or a still image. Device. The method of claim 4, wherein The motion detection unit The CRC value of each region of the image data of the previous frame and the CRC value of each region of the image data of the current frame are compared for each corresponding region, so that the number of regions in which the previous frame and the current frame have different CRC values are preset The image processing apparatus of the plasma display panel, wherein the image data of the current frame is determined as a still image when the reference value is less than the threshold. The method according to claim 1 or 2, The motion detection unit And performing a CRC operation on the image data using a CRC 16 method to generate a CRC value. The method of claim 1, The image processing unit And image processing the image data of the current frame through APL (Average Power Level) processing, inverse gamma correction, and halftone correction according to a result determined by the motion detection unit. A CRC calculation step of generating a CRC value of the image data by performing a cyclic redundancy check (CRC) operation on the image data input from the outside; An image judging step of judging whether image data of a current frame is a moving picture or a still image based on a CRC value of the image data generated in the CRC calculation step; And An image processing step of image processing the image data according to the result determined in the image determination step Image processing method of a plasma display panel comprising a. The method of claim 8, In the CRC operation step The display surface of the plasma display panel is divided into a plurality of areas having a predetermined size, And CRC calculation of image data of a previous frame and a current frame for each of the plurality of regions, respectively, to generate CRC values of the image data of each of the plurality of regions. The method according to claim 8 or 9, In the CRC operation step And performing CRC operation on the image data using a CRC 16 method to generate a CRC value. The method of claim 8, In the image determination step Comparing the CRC value of the image data of the previous frame and the CRC value of the image data of the current frame calculated in the CRC operation step, it is determined whether the image data of the current frame is a video or a still image. Image processing method. The method of claim 11, In the case of determining whether the image data of the current frame is a video or a still image in the image judging step The display surface of the plasma display panel is divided into a plurality of areas having a predetermined size, Image processing of the plasma display panel characterized by comparing the CRC value of each region of the image data of the previous frame and the CRC value of each region of the image data of the current frame to determine whether the image data of the current frame is a moving image or a still image. Way. The method of claim 12, In the case of determining whether the image data of the current frame is a still image or a moving image in the image determining step The CRC value of each region of the image data of the previous frame and the CRC value of each region of the image data of the current frame are compared for each corresponding region, so that the number of regions in which the previous frame and the current frame have different CRC values are preset And determining the image data of the current frame as a still image when the reference value is less than or equal to the threshold. The method of claim 8, In the image processing step And image processing the image data of the current frame through APL (Average Power Level) processing, inverse gamma correction, and halftone correction according to the result determined in the image determination step.

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