KR20190057911A - Display apparatus and controlling method thereof - Google Patents

Abstract

The present invention relates to a display device and a control method thereof. The control method of a display device comprises the following steps: determining a motion vector (MV) based on a motion change amount between frames of an image signal; determining a background region and a foreground region in the frames; calculating a correction constant which is an application ratio of a motion compensation (MC) and a fallback (FB) based on a difference between foreground region motion vectors (FGMV); and generating an insert frame by setting a ratio of the MC and the FB according to the correction constant.

Description

[0001] DISPLAY APPARATUS AND CONTROLLING METHOD THEREOF [0002]

The present invention relates to a display device and a control method thereof.

Liquid crystal cells of a liquid crystal display display an image by changing the transmittance according to the potential difference between the data voltage supplied to the pixel electrode and the common voltage supplied to the common electrode. The liquid crystal display device has a sample and hold characteristic in which one image is displayed while maintaining the same RGB luminance for the entire frame period. Due to such characteristics, it is possible to cause image sticking, false contour, or motion blur (hereinafter simply referred to as 'after-image') at the time of displaying a moving image through the liquid crystal display device have.

Motion estimation and motion compensation (MEMC) is widely used as a method for reducing a residual image of a display device. MEMC creates and inserts an insert frame to be inserted according to motion estimation and motion compensation between two original frames. The number of frames to be displayed per hour is increased by the inserted insert frame, and the frame rate is increased, so that the afterimage can be reduced.

At the time of motion estimation and compensation, an image is generated according to the estimated motion vector by estimating a motion vector of objects in a frame. However, the accuracy of the MEMC can be lowered depending on the characteristics of the image, and the image quality is deteriorated when the MEMC accuracy is low. Therefore, it is required to develop a technology that can complement MEMC according to the characteristic of the image.

The present invention provides a display device and a control method thereof that can prevent deterioration of image quality according to image characteristics by complementing MEMC according to characteristics of an image to generate an insert frame.

A control method of a display apparatus of the present invention includes: determining a motion vector (MV) based on a motion variation amount between frames of a video signal; Determining a background region and a foreground region in the frame; Calculating a correction constant that is a ratio of application of motion compensation (MC) and fallback (FB) based on a difference between motion vectors (FGMV) of the foreground region; And generating an insert frame by setting the motion compensation (MC) and the fallback (FB) ratio according to the correction constant.

The step of determining a background region and a foreground region in the frame may include determining MV blocks having a frequency equal to or greater than a reference number of MV blocks of the frame as a background region; And determining, as a foreground region, a region including an MV in which a reference difference is generated between the MV of the background region and the reference region.

The step of calculating a correction constant, which is an application ratio of motion compensation (MC) and fallback (FB), based on a difference between motion vectors (FGMV) of the foreground region, And calculating the correction constant such that the application ratio of the fallback increases as the difference between the FGMVs increases.

The step of calculating a correction constant, which is an application ratio of motion compensation (MC) and fallback (FB), based on a difference between motion vectors (FGMV) of the foreground region, And calculating the correction constant so that the application ratio of the motion compensation increases as the difference between the FGMVs decreases.

The correction constant has a value between 0 and 1. If the correction constant is 0 or 1, the insert frame can be generated by applying either the motion compensation (MC) or the fallback (FB).

The step of calculating a correction constant, which is an application ratio of motion compensation (MC) and fallback (FB), based on a difference between motion vectors (FGMV) of the foreground region, Calculating an average value of the FGMVs and the average value and an average deviation of the FGMVs of the foreground region according to the following equation.

medium:

Average deviation:

The correction constant has a value between 0 and 1 and can be calculated through the following equation.

Calibration constant:

dm1, dm2 are constants, satisfying dm1 <dm2

A display device of the present invention includes: a display panel; A signal input unit receiving a video signal to be displayed on the display panel; A signal processor for separating a video signal from a signal received by the signal input unit; And a frame compensator for generating an insert frame to be inserted between a current frame and a previous frame based on a motion vector indicating a motion variation amount between frames of the video signal. The frame compensator determines a background region and a foreground region in the frame and then performs motion compensation based on a difference between motion vectors FGMV of the foreground region, Which is an application rate of the fallback (FB), and generates the insert frame according to the correction constant.

The display apparatus and the control method thereof according to the present invention analyze the distribution of a motion vector of a foreground region to determine characteristics of the image and adjust the weight of the MEMC and the fallback according to the determination result Create an insert frame. Thus, it is possible to prevent the image quality from deteriorating due to the characteristics of the image.

1 is a block diagram schematically showing a configuration of a display device according to an embodiment of the present invention.
Figs. 2 to 4 are views for explaining the concept of the MEMC.
5 is a detailed block diagram of the frame compensator shown in FIG.
6 is a flowchart of an image processing method using MEMC according to an embodiment of the present invention.
7 is a flowchart of a correction constant calculation method for MEMC application of the present invention.
FIG. 8 is a function showing the characteristic of the correction constant in FIG.
FIGS. 9 to 13 are views showing the image display state when the MEMC method according to the comparative example is compared with the image display state according to the MEMC method according to the embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Where the terms "comprises", "having", "done", and the like are used in this specification, other portions may be added unless "only" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or &quot; direct &quot; is not used, one or more other portions may be located between the two portions.

The first, second, etc. may be used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or wholly and technically various interlocking and driving are possible and that the embodiments may be practiced independently of each other, It is possible.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a block diagram schematically showing a configuration of a display device according to an embodiment of the present invention.

Referring to FIG. 1, a display apparatus according to an exemplary embodiment of the present invention may include a signal input unit 100, a signal processing unit 110, a frame compensation unit 120, and a display panel 140.

The signal input unit 100 receives a signal input from the outside and outputs the signal. To this end, a tuner for tuning a signal of a channel selected by a user among broadcast signals received through an antenna or a cable, an AV terminal for receiving a signal from various external sources, an S-Video terminal, a component terminal for a PC input or a PC-signal terminal for a PC input.

The signal processing unit 110 demultiplexes a signal output from the signal receiving unit 110 into a video signal and a voice signal and decodes the separated video signal into a signal that can be displayed on the display panel 140 decoding the received signal, and perform predetermined processing for the received signal.

The display panel 140 displays an image according to a video signal output from the signal processing unit 110. For example, the display panel 140 may be a liquid crystal display device (LCD) panel. The LCD panel can display an image using light provided from a backlight unit. To this end, the LCD panel may include a liquid crystal layer and a TFT substrate and a color filter substrate facing each other with the liquid crystal layer interposed therebetween. However, the present invention is not limited to the above-described liquid crystal display device, and can be applied to various display devices such as a plasma display panel (PDP), an electro luminescent display (ELD), and a vacuum fluorescent display (VFD).

The frame compensator 120 may enhance the picture quality by increasing the frame rate by inserting a new insert frame between the consecutive current frame and the previous frame. For example, when a video signal of 60 Hz, that is, a video signal including 60 frames per second is input, the frame rate of an image displayed on the display panel 140 is increased to 120 Hz by inserting an insert frame into each frame The frame rate of the image displayed on the display panel 140 can be increased to 240 Hz when two insert frames are inserted between each frame.

The frame compensator 120 may apply fallback (FB) and MEMC to generate an insert frame. The MEMC determines a motion vector (hereinafter referred to as MV) through a block-based motion estimation (ME) and performs motion compensation (hereinafter referred to as MC) based on the MV Thereby generating an insert frame. The fallback (FB) is a method of generating an insert frame by copying the previous frame as it is.

The frame compensator 120 of the present invention extracts a background area BG and a foreground area FG based on the MV determined through the ME, Determine the application ratio of MC and FB to be applied when generating the frame. MV is uniformly distributed at a constant value in a case where the motion of the foreground (FG) is small or constant. Therefore, since the accuracy of ME is high, it is helpful to improve the image quality by increasing the MC ratio at the time of insert frame generation. On the other hand, since the accuracy of the ME is lowered in the case where the motion of the foreground (FG) is complicated, raising the FB ratio at the time of insert frame generation helps improve the image quality.

The background (BG) region can be discriminated by applying various methods using the distribution of MV blocks and the like. Also, depending on the characteristics of the image, the MV of the background (BG) region may have various values. For example, when the image of the background BG is close to the stop, the MV of the background BG is uniformly discriminated to be close to 0, and the foreground (FG) region is discriminated by the image characteristic.

In the case where the motion of the foreground (FG) is small or constant, the MV is uniformly distributed at a constant value and the motion of the foreground (FG) becomes complicated, so that the size and distribution of the MV are irregularly distributed. Therefore, if the distribution of the MVs of the foreground (FG) is relatively uniform, the ratio of the MC is increased. If the distribution of the MVs is non-uniform, the ratio of the FB is increased to generate the insert frame. .

FIGS. 2 to 4 are views for explaining the basic concept of the MEMC.

Referring to FIG. 2, the MEMC is a technique for acquiring an insert frame (MEMC intermediate frame) image using a plurality of input original images. The input image may include frames (a), (b), and (c). The frame rate can be increased by inserting the frame (a-b) and the frame (b-c) between each frames, thereby reducing the blur.

The process of obtaining the MV representing the motion between the input original images in the process of acquiring the images of the insert frame (ab) frame and the (bc) frame is referred to as ME, and the process of outputting the insert frame using MV and the original image is referred to as motion It is called motion compensation (MC). For example, (a) an object (Object) displayed in a frame may be displayed at another position in the (b) frame. The process of calculating the MV between the frame (a) and the frame (b) and generating an image so that the position of the object in the insert frame (a-b) has continuity is referred to as an MC.

3 is a diagram for explaining a motion estimation (ME) method.

As a motion estimation method, there are various methods such as a block matching method, a 3-D recursive search method, a hierarchical search method, and a MAP application method. Hereinafter, a case will be exemplified in which MV is determined using a block matching method. However, the MV estimation unit 200 of the present invention can determine MVs by various methods other than the block matching method.

Referring to FIG. 3, a block matching method according to an embodiment of the present invention includes 8x8 pixels as one MV block unit. In each block, a block of [t] -frame to [t + 1] Motion is stored in the form of values in horizontal and vertical directions. That is, MV = (mv_x, mv_y). Block matching is a process of obtaining image information in [t + 1] -frame at a position having the lowest value of image information (luminance, RGB, and the like) and cost in [t] Cost) generally uses the sum of absolute difference (SAD). The SAD can be defined as the absolute value of the difference of the image information of all the pixels included in the block. That is, the block of the previous frame data is shifted by one pixel on the basis of the block of the current frame data, and the similarity is obtained by a sum of absolute difference (SAD), and MV is calculated based on the absolute difference . The MV may indicate the direction and speed of movement of the object between the current frame data and the previous frame data on a block-by-block basis.

MV can be expressed by MV1, MV2, etc. based on MV0 and [t + 1] -frame, where [t] and [t + 1] ] -frame and MVs obtained based on a plurality of frames.

Thus, as shown in FIG. 4, MV0 can be defined as MV to [t-1] -frame based on the [t] -frame original image. MV1 can be defined as MV to [t + 1] -frame based on the [t] -frame original image. MV2 can be defined as MV to [t] -frame based on the [t + 1] -frame original image.

The frame compensator 120 of the present invention may increase the frame rate by inserting an insert frame MCI between [t-1] -frame, [t] -frame, and [t + 1] -frame, respectively. The frame compensator 120 may generate an insert frame (MCI) by performing an MC based on MV0, MV1, and MV2, or by performing an FB that cites a previous original frame as it is.

FIG. 5 is a detailed block diagram of the frame compensator 120 shown in FIG.

The frame compensator 120 may insert a new insert frame between the consecutive current frame and the previous frame. In order to perform such a function, the frame compensator 120 includes an MV estimator 200, a correction constant calculator 210, a motion compensator 214 and a pollbacker 220.

The MV estimator 200 determines MV through ME. There are various methods such as block matching method, 3-D recursive search method, hierarchical search method, and MAP application method.

The motion compensation unit 214 is activated when the MC mode is selected. The motion compensation unit 214 generates an insert frame based on the MV determined by the MV estimator 200 and the original image.

The pole back unit 220 is activated in the fallback mode. Create an insert frame using the original image.

The correction coefficient calculator 210 calculates a correction constant, which is an application ratio of the motion compensation MC and the fallback FB, based on the difference between the motion vectors FGMV of the foreground regions. The correction constant is set to increase the ratio of MC when the distribution of the MV of the foreground (FG) is relatively uniform, and to increase the ratio of FB when the distribution is non-uniform.

The image generating unit 240 inserts insert frames generated through the motion compensating unit 220 and the poll unit 230 according to the correction constants calculated by the correction constant calculating unit 210, The rate-increased image can be displayed on the display panel 140. [

The frame compensator 120 according to an embodiment of the present invention having such a configuration increases the ratio of the MC when the distribution of the MVs of the foreground FG is relatively uniform and increases the ratio of the FBs when the distribution is non- Can be generated. Therefore, for images with high MEMC accuracy, the image quality degradation can be improved by increasing the ratio of MC, and the image quality degradation can be alleviated by increasing the FB ratio for images with low MEMC accuracy.

6 is a flowchart of an image processing method using MEMC according to an embodiment of the present invention.

Referring to FIG. 6, when an image including a plurality of frames is input (IMG IN) (S110), an ME for determining an MV based on a motion variation amount between frames is performed (S112).

When the MV is outputted through the ME, an output image mci is obtained by performing the MC process using the MV and the input image (S114).

However, the FB process is added in case the accuracy of the MEMC is low (S116). FB determines the accuracy of the MV and determines the weight w0 of the input image (IMG_IN) and mci. w0 is referred to as a local weight when the frame has different values for each frame, and is referred to as a global weight if the frame has the same value and has different values only for each frame. But the present invention can include all of them.

The closer the w0 is to 0, the higher the accuracy of the MV, and the closer the w0 is to 1, the lower the accuracy of the MV and the higher the weight of the input image (IMG_IN). In this case, w0 is generally determined only based on the accuracy of the MV (existing technology). If the w0 value is the same depending on the type of the image, the performance of the FB may deteriorate. Accordingly, an image determination method (S118) for obtaining a correction constant? For correcting the w0 value according to the image type is added.

In step S120 of generating the insert frame, the local gain w0 determined by the FB is multiplied by the correction constant? Determined according to the image determination according to the accuracy of the MV. Thereafter, the final gain w is multiplied by the input image IMG_IN, and the MC result is multiplied by 1-w (S122) to determine the final output IMG OUT.

The present invention extracts a background (BG) and a foreground (FG) region based on MV determined through ME, and calculates MC and fallback (FB) to be applied when generating an insert frame according to MV characteristics in a foreground (FG) Is determined. Since the background region (BG) is in the stopped state, the MV is uniformly determined as 0, and the foreground (FG) region is determined according to the image characteristic.

MV is uniformly distributed at a constant value in a case where the motion of the foreground (FG) is small or constant. In these images, MV accuracy is high and de-judder of MEMC is also high. Therefore, the ratio of MC should be increased and the specific gravity of FB should be set low.

On the other hand, in the image where the motion of the foreground (FG) is complicated, the MV is uniformly distributed in the background (BG) region, but the MV having the irregular size and direction is distributed in the foreground (FG) region. Since the accuracy of the MV is lowered in such an image, increasing the FB ratio at the time of insert frame generation helps to improve the image quality.

FIG. 7 is a flowchart of a method of calculating a correction constant? For application of the MEMC of the present invention, and may be applied to step S118 of FIG. The correction constant alpha is a constant that determines the ratio of MC to FB and can be determined according to the distribution of MVs corresponding to the foreground (FG) region. In the following description, the process of discriminating the background BG and the foreground FG and determining the image according to the MV distribution of the foreground FG will be described in detail.

Referring to FIG. 7, BGMV is first extracted using MV (S214) and stored in a memory (S216). The BGMV (MV in the background region) can be divided into various methods such as a method of selecting the MV having the highest frequency among the entire MV blocks, a method of extracting the MV of the region estimated in the background (BG) region, a method of clustering MV . When the background (BG) region is close to the stop state, MV is uniformly determined to be close to zero. Hereinafter, a method of extracting the MV of a region estimated as a background region (BG) is exemplified by exemplifying a case where the background (BG) region has less motion, but the present invention is not limited thereto.

The foreground (FG) region is extracted using MV and BGMV at t-3 (S218) and stored in the memory (S220). It is possible to determine an area having MV having a difference of BGMV more than a predetermined size among the MVs of the entire screen as a foreground (FG) area. Here, in order to obtain BGMV, it is necessary to read all the MVs on the entire screen, and therefore it is also possible to use the BGMV values obtained in the previous frame.

The foreground (FG) region and the FGMV average in MV and t-2 are extracted (S222) and stored in the memory (S224). The average of the FGMV is to average the MVs corresponding to the foreground (FG) region. In order to obtain the foreground (FG) area, it is necessary to read the MV values of the entire screen. Therefore, it is also possible to use the foreground (FG) area obtained from the previous frame. The formula for the average of MVs can be written as

medium:

The MV average and the MV average of the foreground (FG) region at t-1 are extracted (S226) and stored in the memory (S228). The FGMV average deviation is the average of the FGMV average and the absolute value of the difference between the MVs in the FG region. In order to obtain the FGMV average, it is necessary to read the MV values of the entire screen. Therefore, it is also possible to obtain the average value of the FGMV obtained from the previous frame. The formula for obtaining the FGMV average deviation can be expressed as follows.

Average deviation:

Finally, the correction constant alpha can be calculated using the FGMV deviation average (S230). The correction constant? Corrects the fall back (FB) specific gravity w0 to obtain the final fallback (FB) specific gravity w. That is, it can be expressed as " w = w0 * alpha ". Since the correction constant? Reflects the MV distribution of the foreground (FG) region that is not reflected only by the fallback specific gravity w0, it may have a constant value that is greater than or equal to 0 and less than or equal to 1.

the value of w0 is maintained when? is 1, and the value of w0 is also calculated when? is 0, so that the fallback is not performed. The correction constant? Can be calculated using the following equation.

Correction constant

In the above equation, DM is an average deviation of FGMV, and dm1 and dm2 are constants set according to DM. The final value of the correction constant a, which is the final calculation result, is truncated to have a value between 0 and 1. As a result, as shown in FIG. 8, the correction constant? Has a form of a linear function.

When the MV of the foreground FG has an irregular motion, the correction constant? Is set close to 1, and consequently the specific gravity of the FB is increased. In the case of an image in which the MV of the foreground (FG) has irregular motion, the phenomenon of degradation of image quality due to the error of the MEMC can be alleviated by increasing the weight of the fallback (FB).

On the other hand, when the MV of the foreground FG has a regular motion, the correction constant? Is set to be close to 0, and consequently the weight of the MC is increased. In the case of an image in which the motion of the foreground (FG) has regular motion, the de-judder of the MEMC can be maintained or improved by increasing the weight of the MC.

FIGS. 9 to 13 are views showing the image display state when the MEMC method according to the comparative example is compared with the image display state according to the MEMC method according to the embodiment of the present invention.

9 is a table showing a fallback (FB) operation according to an embodiment of the present invention. As shown in Fig. 9, the present invention can observe a change in an image by turning off fallback (FB) in case 1 and turning on fallback (FB) in case 2.

On the other hand, in the comparative example of the prior art, case 1 and case 2 are both ON (corresponding to A in the table) or all OFF (corresponding to C in the table). In case 1, ON and case 2 are OFF (corresponding to B in the table), it is a worst case in which the effect of MEMC is not obtained and the effect of fallback (FB) is not obtained. How the present invention varies depending on the presence or absence of a fallback (FB) operation according to each case will be described with reference to FIGS. 10 to 13. FIG.

FIG. 10A illustrates a case where both BGMV and FGBMV exhibit a uniform distribution, and an ideal insert frame (MCI) can display each image at an accurate position.

FIG. 10B shows an actual MV and an image when both BGMV and FGBMV exhibit a uniform distribution. Since the ideal MV and the actual MV are the same, the MEMC can operate effectively. Therefore, the fallback (FB) function must be turned off.

FIG. 11A shows an MV and an image when a fallback (FB) function is turned on before applying the present invention to an image in which both BGMV and FGBMV exhibit a uniform distribution. That is, when there is no FGMV uniformity analysis and fallback is ON, an error occurs in the image of the insert frame (MCI) of FIG. 11A unlike the ideal MCI of FIG. 10A. Thus, the effect of the MEMC is reduced.

FIG. 11B shows an MV and an image when the present invention is applied to an image showing a uniform distribution of both BGMV and FGMV. When the present invention is applied, the on / off state of the fallback (FB) is determined after analyzing the uniformity of the FGMV. Therefore, in the situation as shown in FIG. 11A, the fallback function is turned off. As a result, only the MEMC operates without the fallback (FB), so the insert frame (MCI) can display each image at the correct position. Therefore, the MEMC can operate effectively.

12A shows an image of an ideal MV and a resulting insert frame (MCI) in an image showing an irregular distribution of FGMV. In the ideal insert frame (MCI), each image is displayed in the correct position.

12B shows an actual MV and an image. Since the FGMV has irregular distribution, the center circle and the square change in size during the [t → t + 1] process, and the correct value can not be found and an incorrect value is obtained at the adjacent position. At this time, BGMV shows a uniform distribution, but since the FGMV has a non-uniform distribution, the accuracy of the MEMC is lowered. Thus, when the uniformity of the FGMV falls, the present invention operates in the fallback (FB) mode.

13A shows an MV and an image when the FGMV turns off the fallback (FB) function before applying the present invention to an image showing an irregular distribution. That is, an error occurs in the image of the insert frame (MCI) when the MPC operates with the fallback (FB) off because there is no analysis of the MV uniformity in the image with low accuracy. Thus, the effect of the MEMC is reduced.

FIG. 13B shows an MV and an image when the present invention is applied to an image in which the FGMV shows irregular distribution. When the present invention is applied, the on / off state of the fallback (FB) is determined after analyzing the uniformity of the FGMV. Therefore, in the situation as shown in FIG. 12B, the fallback function is turned on. As a result, although an ideal MCI is generated differently from FIG. 12A, a similar MCI is generated, and the MEMC error can be effectively compensated when compared with FIG. 12B.

As described above, the present invention is effective in an image in which the motion of the entire screen is not large or constant, while the accuracy is low in a specific region of the image or the uniformity of the MV is not constant.

The present invention improves the de-judder of the MEMC by distinguishing the images using the MV distribution characteristic of the FG region and determining the specific gravity of MEMC or fallback (FB) corresponding to each image characteristic, It is possible to simultaneously improve the picture quality deterioration due to the decrease in the accuracy. The present invention is not limited to a specific MEMC algorithm but can be widely applied to various types of algorithms for performing MEMC.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: signal input unit 110: signal processing unit
120: frame compensator 140: display panel

Claims (14)

Determining a motion vector (MV) based on a motion variation amount between frames of the video signal;
Determining a background region and a foreground region in the frame;
Calculating a correction constant that is a ratio of application of motion compensation (MC) and fallback (FB) based on a difference between motion vectors (FGMV) of the foreground region; And
Generating an insert frame by setting the motion compensation (MC) and the fallback (FB) ratio according to the correction constant;
And controlling the display device. The method according to claim 1,
Determining a background region and a foreground region in the frame includes:
Determining MV blocks having a frequency equal to or higher than a reference frequency among MV blocks of the frame as a background region; And
Determining an area including a MV in which a reference difference exists between the MV of the background area and the reference area as a foreground area;
And controlling the display device. The method according to claim 1,
Calculating a correction constant, which is an application ratio of motion compensation (MC) and fallback (FB), based on a difference between motion vectors (FGMV) of the foreground region,
And calculating the correction constant such that the application ratio of the fallback (FB) increases as the difference between the motion vectors (FGMV) of the foreground region increases. The method according to claim 1,
Calculating a correction constant, which is an application ratio of motion compensation (MC) and fallback (FB), based on a difference between motion vectors (FGMV) of the foreground region,
And calculating the correction constant so that the application ratio of the motion compensation (MC) increases as the difference between the motion vectors (FGMV) of the foreground region is smaller. The method according to claim 1,
Wherein the correction constant has a value between 0 and 1, and when the correction constant is 0 or 1, the insert frame is generated by applying either the motion compensation (MC) or the fallback (FB). The method according to claim 1,
Calculating a correction constant, which is an application ratio of motion compensation (MC) and fallback (FB), based on a difference between motion vectors (FGMV) of the foreground region,
Calculating an average value of the motion vector (FGMV) of the foreground region and an average deviation of the average value and the motion vector (FGMV) of the foreground region according to the following equation.
medium:

Average deviation:

The method according to claim 6,
Wherein the correction constant has a value between 0 and 1 and is calculated through the following equation.
Calibration constant:

dm1, dm2 are constants, satisfying dm1 <dm2 A display panel;
A signal input unit receiving a video signal to be displayed on the display panel;
A signal processor for separating a video signal from a signal received by the signal input unit; And
And a frame compensator for generating an insert frame to be inserted between a current frame and a previous frame based on a motion vector indicating a motion variation amount between frames of the video signal,
Wherein the frame compensator comprises:
(MC) and a fallback (FB) based on a difference between motion vectors (FGMV) of the foreground region after determining a background region and a foreground region in the frame, And the insert frame is generated according to the correction constant. 9. The method of claim 8,
Wherein the frame compensator comprises:
And determines an MV block having a frequency equal to or greater than a reference number as a background area and an MV including a MV with a reference abnormal difference as a foreground area. 9. The method of claim 8,
Wherein the frame compensator comprises:
And calculates the correction constant so that the application ratio of the fallback (FB) increases as the difference between the motion vectors (FGMV) of the foreground region increases. 9. The method of claim 8,
Wherein the frame compensator comprises:
And calculates the correction constant so that the application ratio of the motion compensation (MC) increases as the difference between the motion vectors (FGMV) of the foreground region is smaller. 9. The method of claim 8,
Wherein the correction constant has a value between 0 and 1, and when the correction constant is 0 or 1, only the motion compensation (MC) or fallback (FB) is applied to generate the insert frame. 9. The method of claim 8,
Wherein the frame compensator comprises:
And calculates an average value of the motion vector (FGMV) of the foreground region and an average deviation of the average value and the motion vector (FGMV) of the foreground region according to the following equation.
medium:

Average deviation:

14. The method of claim 13,
Wherein the correction constant has a value between 0 and 1 and is calculated through the following equation.
Calibration constant:

dm1, dm2 are constants, satisfying dm1 <dm2

Images