KR0169621B1 - Vertical expansion device and method of video image - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

Vertical stretching device and method

2. The technical problem to be solved by the invention

An object of the present invention is to provide an apparatus and method for increasing the vertical resolution due to linear interpolation and reducing the burden on hardware when the image of an image source is vertically stretched.

3. Summary of Solution to Invention

The present invention performs simple linear interpolation in a field during a moving picture and linear interpolation in a still image in consideration of the hardware burden of the vertical extension device and the resolution of the vertical extension process. In this case, the interpolation coefficient of the present invention used for vertical extension is pre-processed so that the interpolation coefficient of the present invention can be used in the same way regardless of whether the moving image is processed or the still image is processed.

4. Important uses of the invention

Vertical height of image source image

Description

Motion-adaptive vertical stretching device and method

1 is an example display state diagram when displaying an image in letterbox format on an aspect ratio 16: 9 screen.

2 is a state diagram when displaying a letterbox format image vertically stretched and displayed on an aspect ratio 16: 9 screen.

3 is a view showing that the image of an image source is vertically stretched using a conventional vertical deflectometer.

4 is a diagram showing that the image of an image source is vertically stretched by using a distance inverse coefficient.

5 is a diagram showing an intrafield processing relationship used when moving images in the vertical stretching process.

6 is a view showing the relationship between the fields used when a still image in the vertical stretching process.

7 is a block diagram of a luminance signal vertical extension processing apparatus according to the present invention.

8 is a detailed block diagram of the luminance signal decompression processing section shown in FIG.

9 is a block diagram of a color signal vertical stretching processing apparatus according to the present invention.

FIG. 10 is a detailed block diagram of the color signal extension processing section of FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical stretch processing apparatus for a video screen, and more particularly, to an adaptive adaptive stretch processing apparatus and method for vertically stretching a video screen, adapted for a moving picture and a still picture.

The display formats of most television devices which have been used up to now are not only for screens for projection television devices but also for display means embodied by an image display area of a typical cathode ray tube. Has an aspect ratio of 3. Similarly, the aspect ratio of most video sources is 4: 3.

However, not all video sources are made with a 4: 3 aspect ratio. For example, a movie is converted from film format to video tape format for playback or transmission as a television signal. When converting these movie sources to video format, it has customarily changed the aspect ratio to 4: 3, i.e., the aspect ratio suitable for most television devices. An example of such a movie source is a wide screen source having a display format with a 16: 9 aspect ratio. When converting such movie sources into a videotape format, a device such as flying spot telecine is used. Flying Spot Telecine has a window or frame with a 4: 3 aspect ratio, which typically allows the operator to track the center of the action in the film and cut the left and right parts of the image as needed. Move left and right. This is because the horizontal width of the film image becomes wider than the horizontal width of the 4: 3 aspect ratio screen when the vertical height of the film image is fit to the screen under the 4: 3 screen. Accordingly, the left and right portions of the video signal converted from the 16: 9 aspect ratio source to the 4: 3 aspect ratio are cut out from the film image.

If the wide screen image is reduced in scale until the horizontal width matches the left and right borders of the 4: 3 aspect ratio screen, the vertical height of the image becomes smaller. As a result, the film source image appears completely on the 4: 3 aspect ratio screen, but there are portions where the image is not filled in the upper and lower portions of the 4: 3 aspect ratio screen. In order to avoid spurious signals in areas where no image appears, a dark ious is transmitted to the top and bottom of the image converted to 4: 3 aspect ratio. The particular display format thus processed is commonly referred to as letterbox format. Accordingly, a letterbox signal can be considered as a video signal having an active screen portion smaller than a normal video signal.

For example, a letter box format video signal includes a letter box size video signal and a cinemascope size video signal. For example, a letterbox-sized video signal has a valid horizontal scan line of 360 lines and a cinemascope-sized video signal has a 320 horizontal valid line scan lines.

As an example, if a letterbox or cinemascope size image as described above is displayed on a television screen with a 16: 9 aspect ratio without any signal processing, the image of the image source spreads from side to side as shown in FIG. A sense of catabolism occurs.

In order to prevent the sense of catastrophe as described above, by increasing the vertical height of an image of a letterbox or cinemascope size, the image source image is not spread from side to side even on a 16: 9 aspect ratio television screen as shown in FIG. The upper and lower black bands should not appear.

Accordingly, several techniques have been proposed to increase the vertical height of letterbox or cinemascope sized images.

As one of such techniques, there has been a technique using a vertical deflection meter of a television apparatus. This increases the vertical height of the letterbox or cinemascope sized image by adjusting the gain of the vertical size adjustment circuit 4 provided in the general vertical deflection circuit as shown in FIG. Typically, the vertical scale adjustment circuit 4 is a circuit used to adjust the vertical size of the raster. The level of the sawtooth wave oscillated by the vertical oscillator 2 is proportional to the gain adjusted by a device such as a variable resistor. To change. The sawtooth voltage regulated by the vertical size adjustment circuit 4 is amplified by the vertical amplifier 6 and then applied to the vertical output circuit 8 to achieve vertical deflection at the CRT 10. Therefore, by increasing the gain of the vertical size adjustment circuit 4 so that it should be stretched according to the letterbox or cinemascope size, the image source image does not spread from side to side even on a 16: 9 aspect ratio television screen as shown in FIG. The black band will not appear.

As described above, when the image source of the image source is vertically stretched using the deflectometer, the circuit configuration is simple and the analog processing method is also possible. However, as the vertical height is increased, the interval between the horizontal scan lines becomes wider. In addition to the deterioration, there was a disadvantage that the horizontal scan line is visible.

Another technique for stretching the vertical height of letterbox or cinemascope sized images has been the use of inverse distance coefficients. 4 shows an example of vertically stretching a letterbox-sized image by using a distance inverse coefficient. For convenience, it is assumed that a source video signal has seven horizontal scanning signals. Referring to FIG. 4, a coefficient inversely proportional to the distance between the pixels P1 to P7 of the source video signal and the pixels to be reconstructed is multiplied by the pixel value of the source video signal, and two adjacent values of the multiplied values are added to the adders 12 to. New pixels P1 'to P9' are generated by adding by 22 respectively. In this case, a block indicated by a dotted line becomes a basic processing unit. The pixels of the four horizontal scan lines are reconstructed by processing the pixels of the three horizontal scan lines of the source image signal. Accordingly, unlike the technique of using the deflectometer, it is possible to prevent the horizontal scan line from being widened or the horizontal scan line from being seen.

However, as described above, when the vertical stretching by interpolation using a distance inverse coefficient still has a problem that the resolution is lowered. In addition, when the source image adopts the interlaced scanning method, the coefficients must be changed for every field. On the other hand, when the sequential scanning method is adopted, there is a problem that a single coefficient must be used after interpolation.

Another technique for increasing the vertical height of letterbox or cinemascope sized images has been the use of a Finite Impulse Response filter. However, the technique of increasing the vertical height of an image using this finite impulse response filter requires a large number of taps of the FIR filter, which is complicated by the hardware configuration and can only perform intrafield processing. If there was a problem that deterioration occurs.

Accordingly, an object of the present invention is to provide a vertical extension device and a method capable of minimizing the deterioration of the resolution that occurs during image vertical extension.

Another object of the present invention is to provide a vertical extension apparatus and method for performing vertical extension of an image regardless of a television system method.

It is still another object of the present invention to provide a vertical extension apparatus and method for reducing the burden of hardware while minimizing the deterioration of resolution when the image is vertically stretched.

According to the above object, the present invention, in consideration of the hardware burden of the vertical expansion device and the resolution of the vertical stretching process in the moving image to perform a simple linear interpolation process in the field, and in the still image to perform the inter-field linear interpolation process We head to doing. In this case, the vertical extension processing coefficient used for vertical extension is used the same regardless of the moving image processing or the still image processing. For this purpose, the pixel data of each line before stretching of the image signal is pre-processed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, the vertical size of the image will be described as an example of stretching of 2: 3 (two lines to three lines). The 2: 3 vertical extension example in the present invention has two methods as shown in FIG. 5 and FIG. One of the methods is intrafield linear interpolation, and the other is interfield linear interpolation.

5 is a diagram showing the interpolation linear interpolation processing relationship used when moving images in the vertical stretching process according to the present invention, Figure 6 is a diagram showing the interpolation linear interpolation processing relationship used when the still image in the vertical stretching process .

5 and 6, vertical two pixels of a0 and a1 denote pixel data per line before stretching, and vertical three pixels of b0, b1 and b2 denote interpolated pixel data after stretching. And a0 'and a1' denote pixel data of the previous field.

First, referring to FIG. 5, the vertical two pixels a0 and a1 are composed of arithmetic elements that make the vertical three pixels b0, b1 and b2. The computing elements consist of counters 20, 22, 24, 26, 28, 30 and adders 32, 34. The pixel data b0, b1, b2, b3 interpolated after the decompression according to the configuration of FIG. 5 is obtained by the following relation (1).

The linear interpolation processing method as shown in Fig. 5 is advantageous for vertical extension processing of moving images since the vertical two pixels a0 and a1, which are pixel data for each line before extension, are in the same field.

Meanwhile, referring to FIG. 6, the vertical two pixels a0 and a1 of the current field and the vertical two pixels a0 'and a1' of the previous field are input to be configured as three vertical pixels b0, b1 and b2. The computing elements of FIG. 6 consist of counters 40, 42, 44, 46, 48, 50 and adders 52, 54. Pixel data b0, b1, b2, and b3 interpolated after expansion according to the configuration of FIG. 6 are obtained by the following relation (2).

The shaping interpolation processing method as shown in FIG. 6 is advantageous for vertical extension processing of still images since the pixel data for each line before stretching are the vertical two-pixel data a0, a1 of the current field and the vertical two-pixel data a0 ', a1' of the previous field. .

Therefore, in the present invention, the hardware logic is implemented to selectively perform the operation according to the relational expression (1) of FIG. 5 in the moving picture and the operation according to the relational expression (2) of FIG. 6 in the still image. In this relation (1) (2) between the intra-field linear interpolation process (FIG. 5) and the inter-field linear interpolation process (FIG. 6), if the same vertical extension coefficients are used, the hardware logic according to the present invention is much simpler. Will be configured.

In the present invention, the pixel data a0 'of the previous field is And pixel data a1 'of the previous field is Use the fact that it is. In relation (1) used for moving image processing, the pixel data a0 'and a1' of the previous field are not used, but the pixel data a1 'and a2' of the current field are used, so the pixels a0 'and a1' of the previous field are used. Average pixel data corresponding to pixels a0 'and a1' of the previous field You can make first, Put it on, Place it. This value is substituted into the following intrafield linear interpolation relational expression (1) used for moving images.

Then, the relational expression (1) used at the time of moving image processing is arranged as follows (underlined portion).

Looking at the vertical extension processing coefficients of (3) (4) (5) (6) summarized in relation (1), it can be seen that they are the same as the processing coefficient of the following relation (2) used in the stop processing of FIG.

7 and 9 of the present invention implement the above methods in hardware logic.

7 is a block diagram of a luminance signal vertical stretch processing apparatus according to the present invention, and FIG. 9 is a block diagram of a color signal vertical stretch processing apparatus according to the present invention.

The structure of FIG. 7 is largely comprised of the same discrimination part, the line data preprocessing part for each line, the vertical extension mode selection part, and the line extension processing part. The copper discriminating unit corresponds to the dotted block 200, and determines the copper of the current video signal by comparing the absolute absolute value between the previous frame and the current frame of the video signal with a preset copper-specific threshold value. The pixel data pre-processing unit for each line corresponds to 60, 62, 64, 66, 68, 70, 72, 74, 76, and 80, and a second calculation formula commonly used in the moving image vertical expansion process and the still image vertical extension process (relational expression to be described later) In order to match the vertical decompression processing coefficient of (3)), the pixel data for each line before decompression of the video signal is calculated using a first calculation formula ( Are converted to average pixel data using < RTI ID = 0.0 > 1) < / RTI > The vertical extension mode selector corresponds to 78 and 82, and selects and outputs one of the average pixel data and the field delay pixel data based on the determination of the copper discrimination unit 200. The line extension processing unit corresponds to 84. The pixel data selected and output by the vertical extension mode selection units 78 and 82 and the pixel data for each line before stretching are obtained using the second calculation equation (relational expression (3) to be described later). The decompression processing is performed on pixel data of a predetermined line.

First, the configuration and operation of the luminance signal vertical extension processing apparatus will be described in more detail with reference to FIG. An operation of generating pixel data of three lines by inputting pixel data of two lines according to the present invention is as follows.

The luminance signal Y is now coming in. According to Figs. 5 and 6, the pixel data a0, a1, a2 for each line comes in a serial sequence for each line. Among the pixel data a0, a1, and a2 of each line, a0 is delayed by two lines by one line delay 60 and 62, a1 is delayed by one line by one line delay 60, and a2 is not line delayed. Therefore, the pixel data a0, a1, a2 for each line are all at the same time.

At this time, a1 and a2 of the pixel data of each line are added by the adder 64 and the coefficient is counted by the counter 68. Multiply by and average pixel data on line 69 It is popular as. Average pixel data applied on the line 69 The value of to be. Of the pixel data of each line, a0 and a1 are added at the adder 66 and multiplied by the coefficient ½ at the counter 70 to obtain the average pixel data on the line 71. Is applied as. The average pixel data Is to be. Above average pixel data Wow Is the pixel data in the current field used for moving picture vertical stretching, Is applied to input 1 of the third multiplexer 82 Is applied to the input terminal 1 of the second multiplexer 78.

On the other hand, the pixel data a1 is applied to the input terminal 1 of the first multiplexer 76 after being delayed 262 lines through the 262 line delay unit 72 and to the input terminal 2 of the first multiplexer 76 after being delayed 312 lines through the 312 line delay unit 74. Is approved. The 262 line delay unit 72 is a delay element for delaying almost one field of pixel data according to the NTSC scheme, and the 312 line delay unit 74 is a delay element for delaying almost one field of pixel data according to the PAL scheme. Therefore, the first multiplexer 76 selects one input terminal according to the television system broadcast system. The signal applied to the selection terminal S of the first multiplexer 76 from the host of the system is the television system broadcasting system signal NP. When NP = 1, the NTSC system is used, and when NP = 0, the PAL system is used.

The data output from the first multiplexer 76 is the one-field delayed data, and thus is the pixel data of the line immediately after the previous field. That is, a ₁ '. The pixel data a ₁ ′ is applied to the input terminal 0 of the second multiplexer 78. In addition, the pixel data a ₁ ′ is applied to the third multiplexer 82 after one line delay by the one line delay unit 80. In this case, data output from the first line delay unit 80 and input to the third multiplexer 82 is pixel data of a previous field, that is, a ₀ '.

In the two input stages of the second multiplexer 78 and the multiplexer 82, the preprocessing pixel data a ₀ * and a ₁ * which are applied to the input stage 1 are selected at the time of moving image, and the previous field pixel data which is applied to the input stage 0 a _0. 'And a ₁ ' are selected for still pictures.

The moving information signal MO applied to the selected stage S of the second multiplexer 78 and the third multiplexer 82 to determine the moving picture and the still picture is the copper discriminating unit 200 (dotted block) shown in FIG. Is generated by). The operation of the determination unit 200 will be described below.

The pixel data a1, which is the output of the one-line delay 60, is applied directly to the subtractor 88, and is applied to the subtractor 88 via the 525 line delay 86. The 525 line delay unit 86 is a delay element for delaying one frame 525H according to the NTSC method, and the output signal becomes the previous frame pixel data. The subtractor 88 applies a value obtained by subtracting the pixel data of the previous frame from the pixel data a1 of the current frame to the input terminal 1 of the fourth multiplexer 94.

The pixel data al is directly applied to the subtractor 92, and is applied to the subtractor 92 via the 525 line delayer 86 and the 100 line delayer 90. The 525 line delayer 86 and the 100 line delayer 90 are delay elements that delay one frame 625H according to the PAL method, and the output signal becomes the previous frame pixel data. The subtractor 92 applies a value obtained by subtracting the pixel data of the previous frame from the pixel data a1 of the current frame to the input terminal 0 of the fourth multiplexer 94.

The fourth multiplexer 94 selects and outputs one input in response to the television system broadcast system signals NP (NP = 1: NTSC, NP = 0: PAL). The output of the fourth multiplexer 94 is absolute-valued at the absolute value unit 96 and applied to one input terminal of the comparator 98. At this time, the output of the absolute value unit 96 is an absolute value of the same degree between the previous frame and the current frame. Therefore, the comparator 98 compares the output of the absolute value unit 96 with the preset threshold value THR for each copper plate and outputs the dynamic information signal MO. If the output of the absolute value 96 is greater than the threshold for each plate, the comparator 98 outputs MO = 1, and if the output of the absolute value 96 is less than the threshold for each plate, the comparator 98 is not. Outputs MO = 0

Accordingly, the second multiplexer 78 and the third multiplexer 82 select and output the preprocessed pixel data a ₀ * and a ₁ * applied to the input terminal 1 in response to MO = 1 in the moving image, and output the MO in the still image. In response to = 0, the previous field pixel data a ₀ ′ and a ₁ ′ applied to the input terminal 0 are selected and output.

In FIG. 7, pixel data output from the second multiplexer 72 is represented by preprocessing pixel data a ₀ +, and pixel data output from the third multiplexer 82 is represented by preprocessing pixel data a ₁ +. have. The preprocessing pixel data a ₀ +, a ₁ + is applied to the pixel data a ₀ , a ₁ of the current field and the luminance signal decompression processing unit 84.

Luminance signal expand block 84 is a pre-processing pixel data a ₀ +, a ₁ + a, the current field pixel data of a _0, calculated according to a ₁ to the relational expression (3) described below 2:03 vertically elongated b _0, b ₁ and b ₂ , and selects and outputs the vertically stretched three-pixel data b ₀ , b ₁ , b ₂ in response to the selection signal SEL1 for each mode by the horizontal synchronous signal Hsync, the vertical synchronous signal Vsync, and the mode signal Mode.

8 is a detailed block diagram of the luminance signal decompression processing unit 84 in FIG. Hereinafter, the configuration and operation of the luminance signal extension processor 84 will be described in more detail with reference to FIG. 8. The luminance signal decompression processor 84 includes counters 100, 102, 104, 106, 108, multipliers 110, 112, a mode-specific selection signal generator 116, and a fifth multiplexer 114. The counters 100, 102, 104, 106, 108 and the multipliers 110, 112 are operands designed to satisfy the following relation (3).

The computing elements according to the above relation (3) satisfy both the intra-field linear interpolation processing (for moving images) and the inter-field linear interpolation processing (for still images). Accordingly, the 2: 3 line stretched pixel data b ₀ , b ₁ , and b ₂ output from the operators are input to the input terminals S0, S1, and S2 of the fifth multiplexer 114, respectively. Of the pixel data b ₀ , b ₁ , b ₂ , b ₀ is input to the input terminal SO, b ₁ is input to the input terminal S1, and b ₂ is input to the input terminal S2.

The selection signal generator 116 for each mode takes the timing necessary for the horizontal synchronization signal Hsync and the vertical synchronization signal Vsync, and grasps the number of extension in the mode signal Mode applied from the host (for example, microcomputer) of the system, and selects the selection signal SEL1 for each mode. Is output to the fifth multiplexer 114. In the present invention, since one embodiment of the vertical extension is 2: 3, the number of elongations is three.

Accordingly, the fifth multiplexer 114 selects and outputs pixel data b ₀ , b ₁ , b ₂ input to the input terminals in response to the state of the mode selection signal SEL1 output from the mode selection signal generator 116. . The SO stage is selected when SEL1 = '00 'in the mode selection signal, and the S1 stage is selected when SEL1 = '01'. If SEL1 = '10 ', the S2 stage is selected. Therefore, the output of the fifth multiplexer 114 becomes the luminance signal Y 'which is three pixel data (which is a value extended by 2: 3).

9 is a block diagram of a color signal vertical stretching processing apparatus according to the present invention, and FIG. 10 is a specific block diagram of the color signal stretching processing section of FIG. The color signal vertical stretch processing apparatus of FIG. 9 is similar to the configuration of the luminance signal vertical stretch processing apparatus of FIG. The difference is that the color signal decompression processing section of FIG. 9 does not have the same video discrimination section 200 (indicated by the dashed block) of FIG. 7 that generates the same information signal MO for judging moving pictures and still pictures. The color signal decompression processing section of FIG. 7 always performs linear interpolation processing without performing the interfield linear interpolation processing performed by the luminance signal decompression processing section. Therefore, the signal M1 applied to the selection terminal S of the seventh multiplexer 138 and the eighth multiplexer 142 is always set to select only the input terminal 1.

And, in Fig. 7, signals related to luminance a ₀ , a ₁ , a ₂ , a ₀ *, a ₁ *, a ₁ ', a ₂ ', a ₀ +, a ₁ + signals related to this color c _{The difference is that 0} , c ₁ , c ₂ , c ₀ *, c ₁ *, c ₁ ', c ₂ ', c ₀ + and c ₁ +, respectively. Therefore, the specific operation of the color signal decompression processing section of FIG. 9 is coped with the operation of the luminance signal decompression processing section described above with reference to FIG.

The configuration and operation of the color signal decompression processing unit 114 in FIG. 10 are also the same as the configuration and operation of the luminance signal decompression processing unit 84 in FIG. Only the color signal decompression processor 114 is different from the luminance signal decompression processor 84 such that the signals a ₀ , a ₀ +, a ₁ , a ₁ + and b ₀ , b ₁ , b ₂ , and Y are signals related to color. The only difference is that they are changed to c ₀ , c ₀ +, c ₁ , c ₁ + and d ₀ , d ₁ , d ₂ , c ', respectively.

In the present invention, the embodiment of the vertical extension treatment is described in 2: 3, but in the spirit of the present invention, the vertical extension treatment in various ratios such as 1: 1, 3: 4, 4: 5, 5: 6, 6: 7, etc. It will be apparent to those skilled in the art that the practice is possible.

In addition, the vertical extension processing of the image according to the present invention can be used not only for a 16: 9 screen but also for a 4: 3 screen.

As described above, the present invention performs a simple linear interpolation process in a field during a moving picture and performs a linear interpolation process in a field during a still picture to effectively increase the vertical resolution, and pre-process pixel data for each line before the image signal is stretched. In addition, the linear extension processing coefficients used for the vertical extension are used the same regardless of the moving image processing and the still image processing, so that linear interpolation between moving images and still images is adaptively performed, thereby reducing hardware. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the equivalents of the claims and the claims.

Claims (11)

An apparatus for vertically stretching a video screen, comprising: video discrimination means for discriminating the motion of the current video signal by comparing the absolute value between the previous frame and the current frame of the video signal with a preset copper plate threshold; In order to match the vertical extension processing coefficient of the vertical extension processing formula commonly used in still image vertical extension processing, the pixel data for each line of the video signal is preprocessed by coefficient adjustment and outputted as average pixel data and field delay pixel data by one field delay. By means of preprocessing means for pixel data for each line, vertical extension mode selecting means for selectively outputting one of the average pixel data and the field delay pixel data based on the same determination of the same means; and the vertical extension mode selecting means. Selective output pixel data and pixel data per line Motion adaptive vertical feeding device using the vertical expansion processing, which will have the formula, characterized in that the line consists of expansion processing means for processing pixel data of a predetermined height to the line. 2. The apparatus of claim 1, wherein the discrimination means comprises: difference calculating means for calculating a difference between the video state of the previous frame and the video state of the current frame according to the NTSC method and the PAL method; And an absolute value means for absolute value and a comparison means for outputting a dynamic information signal by comparing the absolute value difference in the absolute value means with the predetermined copper plate-specific threshold value. 3. The apparatus of claim 2, wherein the difference calculating means comprises: a first line delayer delaying the video signal of the current frame by 525 lines, a second line delayer delaying the output of the first line delayer by 100 lines, A first subtractor for subtracting the output of the video signal and the first line delayer, a second subtractor for subtracting the output of the video and the second line delayer of the current frame, and a selection signal according to a television system broadcasting system. And a selector configured to alternately output the first and second subtractors based on the selector. The method of claim 1, wherein the determination means, the first and second frame delay for delaying one frame each of the video state of the current frame based on the NTSC method and the PAL method to extract the video state of the previous frame; And first and second subtractors for calculating and outputting a difference between the video state of the current frame and the video state of the previous frame due to the frame delay of the first and second frame delayers. A selector for selectively outputting the output of the subtractor in response to a selection signal according to the NTSC method and the PAL method; an absolute value unit for absoluteizing an image state difference between the current frame and the previous frame selected by the selector; And a comparator for outputting a moving information signal by comparing an absolute value difference with the predetermined threshold value for each copper plate. The pixel data preprocessing means for each line is configured to calculate the pixel data for each line by using a first operation equation and a second operation equation below, wherein the first and second pixels are required for the vertical moving process. Calculation means for outputting average pixel data, and the first and second pixels necessary for the vertical processing of the still image by delaying the pixel data for each line by one field delay based on the television system broadcasting method and by one line less than the one field. A motion adaptive vertical stretching apparatus characterized by comprising a delay means for outputting field delay pixel data. A ₀ *: first average pixel data a ₁ *; Second average pixel data a ₀ , a ₁ , a ₂ : pixel data per first line 6. The line extension processing means according to claim 5, wherein the line extension processing means is further configured to convert the first and second average pixel data and the pixel data for each line during the vertical extension processing of the moving image into the first and second fields during the vertical extension processing of the still image. A line extension calculating means for extending the line by using the delay pixel data and the pixel-by-line pixel data using a vertical extension processing formula as shown below, and outputting the output of the line extension calculating means to the horizontal synchronization signal, the vertical synchronization signal, and the number of line extension. And an extension line selecting means for selecting and outputting the output based on the mode signal. However, b ₀ , b ₁ , b ₂ : line extension data a ₀ , a ₁ : Pixel data _per line a ₀ +, a ₁ +: first and second average pixel data and first and second field delay pixel data A method of vertically extending a video screen, the method comprising: determining a moving state of a current video signal by comparing a moving absolute value between a previous frame and a current frame of a video signal with a predetermined copper plate threshold value, and moving picture vertical extension processing In order to match vertical extension processing coefficients commonly used during vertical and still image vertical processing, the pixel data for each line of the video signal is preprocessed by coefficient adjustment and outputted as average pixel data and field delay pixel data by one field delay. A selection process of selecting and outputting one of the average pixel data and the field delay pixel data based on the same determination of the same determination process; and the pixel data selected and output in the selection process and the pixel for each line. As a data input, it is possible to calculate the vertical And a line extension process for extending the pixel data of a predetermined line by vertically stretching. 8. The method of claim 7, wherein the discrimination step comprises: a difference calculating step of calculating a difference between the video signal of the previous frame and the video signal of the current frame according to the NTSC method and the PAL method; And a comparison step of outputting the dynamic information signal by comparing the absolute value of absolute value and the difference value absoluteized in the absolute value with a predetermined threshold value. 8. The method of claim 7, wherein the determining process comprises: a one-frame delay step of delaying one frame of each video signal of the current frame based on an NTSC method and a PAL method to extract an image state of the previous frame; Calculating a difference between the video signal of the current frame and the video signal of the previous frame due to the first and second delays, and outputting the difference as the first and second signals; A selection step of selecting one of the first signal and the second signal in response to a selection signal according to the NTSC method and the PAL method; and an absolute value of an image signal difference between the current frame and the previous frame selected in the selection step And a comparison step of outputting a moving information signal by comparing the absolute value difference in the absolute value step with the predetermined copper plate-specific threshold value. 8. The method of claim 7, wherein the selection process selects and outputs only the average pixel data when processing the color signal of the video signal. The method of claim 7, wherein the pixel data preprocessing for each line is performed by calculating the pixel data for each line by using a first operation equation and a second operation equation below. A first step and a second step required for the vertical processing of the still image by outputting average pixel data, and delaying the pixel data for each line by one field delay based on the television system broadcasting method and one line smaller than the one field. And a delay step of outputting field delay pixel data. A ₀ *: 1st average pixel data a ₁ *: 2nd average pixel data a ₀ , a ₁ , a ₂ : pixel data per first line