KR19990081263A - Apparatus and method for adjusting deflection ratio of video signal - Google Patents

Abstract

The present invention relates to an apparatus and method for adjusting a deflection position and a ratio of a video signal that can vary an aspect ratio of an input video signal having an arbitrary image size from an arbitrary position to an arbitrary value. Increasing or decreasing deflections in the horizontal and / or vertical directions at different ratios per block. As described above, the present invention provides an image display device for displaying an input image having an arbitrary image size on a screen divided into a plurality of horizontal sections or vertical sections, which are set in advance, wherein the horizontal section and the vertical section overlap each other. A microprocessor for generating deflection change amount information on a block-by-block basis, a bus decoder for receiving and decoding the deflection change amount information, and the decoded deflection change amount information for a horizontal and / or vertical deflection change amount of the block in a predetermined order. And a deflection control section for generating a deflection signal for increasing and / or decreasing the horizontal and / or vertical deflection values therefrom.

Description

Apparatus and method for adjusting deflection position and ratio of video signal

The present invention relates to an apparatus and method for adjusting a deflection position and a ratio of an image signal used in an image display device. More particularly, the aspect ratio of an input image signal having an arbitrary image size can be varied from an arbitrary position to an arbitrary value. A deflection position and ratio adjusting device and method are disclosed.

Recently, as the use and application of a video display device such as a television or a video camera have become popular, efforts have been made to improve the quality of images displayed on the video display device. As a representative example, it can be said to develop a high definition television (HD TV) which realizes high definition and large screen size by doubling the number of scanning players and increasing the aspect ratio compared to the conventional color television.

In addition, as the exchange of video culture between countries is active due to the development of information and communication, each home or office can easily edit video signals, and the number of externally provided video programs is also increasing. For example, you can play back images taken with a video camera in each home, and broadcasting stations can provide viewers with various broadcast programs, movies produced by film companies, and various sports broadcasts. . However, since the aspect ratio of each image display device owned by each user is a fixed aspect ratio such as 4: 3 to 16: 9, when the aspect ratio is required in consideration of the characteristics of the input image, a deflection wave generator is used. The aspect ratio of the screen could be converted by deflecting the input image in a horizontal to vertical direction.

1 is a configuration diagram showing the internal configuration of a general analog deflection wave generator.

Referring to FIG. 1, a general analog type deflection wave generator generates horizontal and vertical sawtooth waves according to input horizontal and vertical synchronization signals (Hsync / Vsync), respectively. 21), horizontal and vertical S-shaped correction circuits 12 and 22 for correcting the start and end portions of the output waveforms output from the horizontal and vertical sawtooth wave generating circuits 11 and 21 into S-shaped shapes, respectively; And current amplifiers 13 and 23 that amplify the output signals of the horizontal and vertical S-shape correction circuits 12 and 22 to a predetermined level and output them to the CRT. Here, the horizontal and vertical sawtooth waves are set to scan in one direction, for example from left to right, at regular intervals from top to bottom.

Conventionally, a portion of a screen is changed by correcting a part of a triangular waveform for clock conversion or deflection using an analog deflection wave generator. That is, as shown in FIG. 2A, the screen having a normal shape without ratio conversion as shown in FIG. 2A is horizontally transformed at a constant ratio for all vertical sections as shown in FIG. Vertical conversion was possible at a constant rate for all horizontal sections. Thus, deformation of the screen was possible within certain limits as in FIGS. 2B to 2C.

However, in the prior art, when the vertical to horizontal deflection is performed, the ratio of the entire screen is fixed only because the deflection ratio is fixed at a constant ratio in the horizontal or vertical direction of the screen. Therefore, if the user wants to change the aspect ratio of the screen to a desired ratio at a desired position of a specific part of the screen due to the characteristics of the video signal, it is impossible with the current technology. If the aspect ratio of the screen of the necessary portion of the entire screen can be changed, it is possible to provide a further improved quality of image by utilizing the inherent characteristics of the video signal, this technology can be applied to various fields of the video display device.

The present invention provides an apparatus and method for freely changing the aspect ratio of a screen by deflecting the screen to a desired deflection ratio value during a desired position or a desired section of the screen while being divided into a plurality of horizontal and vertical sections. will be.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the problems mentioned in the prior art described above, and an object of the present invention is to provide a form suitable for a given screen regardless of the aspect ratio of the input video signal or the range of the viewing area. It is to provide a deflection position and ratio adjusting apparatus and method that can display the aspect ratio of the. That is, when the coordinates shown in FIG. 18 are Tx1: Tx2 = x: y (x, y> 0), the coordinates of FIG. 18 are not intended to be any ratio other than the spatial ratio X1: X2 = x: y. .

According to the present invention, the tilt of the deflection wave can be easily adjusted at any horizontal and vertical position by using a control device such as a microcomputer, so that the aspect ratio of the image at the corresponding position is changed. In addition, any input pixel can be controlled to be displayed at a desired position.

1 is a block diagram showing the configuration of a general analog deflection wave generator.

2A is a screen state diagram of a normal case without ratio conversion.

FIG. 2B is a screen state diagram in which horizontal conversion is performed at a constant rate for all vertical sections with respect to the normal screen shown in FIG.

FIG. 2C is a screen state diagram in which vertical conversion is performed at a constant rate for all horizontal sections with respect to the normal screen shown in FIG. 2A.

3 is a block diagram of a deflection wave generator for performing aspect ratio conversion according to an embodiment of the present invention.

FIG. 4 is a block diagram showing the format of a control bus signal output from the microprocessor shown in FIG.

FIG. 5 is a block diagram illustrating an internal configuration of the bus decoder illustrated in FIG. 3.

FIG. 6 is a block diagram of another embodiment of the bus decoder shown in FIG.

7A to 7B are screen state diagrams showing a block structure of a screen for implementing horizontal deflection and vertical deflection.

8 is a block diagram illustrating a horizontal slope control unit and a vertical slope control unit shown in FIG. 3.

FIG. 9 is a block diagram illustrating an internal configuration of the horizontal and vertical deflection value generator shown in FIG. 3.

FIG. 10 is a block diagram illustrating an internal configuration of the flip-flop array shown in FIG. 5.

FIG. 11 is a block diagram illustrating another embodiment of the bus decoder illustrated in FIG. 5.

12A to 12C are deflection waveform diagrams for a slope control output and a sawtooth wave output according to an exemplary embodiment of the present invention.

13A is a screen state diagram in a normal case without ratio conversion.

FIG. 13B is a screen state diagram in which horizontal conversion is performed at a constant rate for all vertical sections with respect to the normal screen shown in FIG. 15A. FIG.

FIG. 13C is a screen state diagram in which horizontal conversion is performed at a constant rate for all vertical sections with respect to the normal screen shown in FIG. 15A.

14 is a graph illustrating a change state of a horizontal deflection wave of a vertical deflection wave when the vertical deflection for each horizontal section is variable according to an exemplary embodiment of the present invention.

15A to 15B are screen state diagrams illustrating a case in which the normal screen without the screen ratio conversion and the vertical deflection of the screen are changed according to the horizontal section when the vertical conversion ratio for each horizontal section according to FIG. 6 is variable. to be.

FIG. 16 is a block diagram illustrating an internal configuration of a horizontal and vertical deflection value generating unit shown in FIG. 3 during bidirectional scanning according to another exemplary embodiment of the present invention.

17A to 17C are deflection waveform diagrams showing bidirectional horizontal scanning of the horizontal and vertical deflection value generating units shown in FIG. 16.

18 is a screen state diagram for explaining the purpose of the present invention.

Description of the main symbols in the drawings

300: microprocessor 301: bus decoder

302: pixel counter for horizontal deflection

303: vertical position counter for vertical deflection

304: horizontal slope control unit 305: vertical slope control unit

306: horizontal deflection value generating unit 307: vertical deflection value generating unit

308, 309: Digital-to-Analog Converter

310: horizontal low pass filter 311: vertical low pass filter

312, 313: current amplifier

321: horizontal / vertical deflection display section 322: section definition display section

323: section number display section 324: slope display section

325: increase / decrease display section 326: section length display section

Hereinafter, the configuration, operation and effects according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 3 is a block diagram of a deflection position and ratio adjustment apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the deflection position and ratio adjusting apparatus of the present invention is a microprocessor (300) for generating deflection change information for each block unit in which the horizontal and vertical sections overlap the input image according to a user's input signal. ), A bus decoder 301 that receives and decodes the deflection change amount information output from the microprocessor 300, and the decoded deflection change amount information output from the bus decoder 301, and thus the corresponding block in a predetermined order. And a deflection control unit for determining a horizontal and / or vertical deflection change amount and generating a deflection signal for increasing and / or decreasing the horizontal and / or vertical deflection value therefrom. Here, the deflection control unit includes a horizontal deflection pixel counter unit 302 and a bus decoder 301 which determine the length of each horizontal section using a pixel clock provided from the bus decoder 301 as shown in FIG. 3. A horizontal slope control unit 304 and a horizontal slope control unit 304 for controlling the slope of the horizontal deflection wave by receiving linear or increase / decrease (up / down) information included in the deflection change amount information output from the output; A horizontal deflection value generator 306 for generating a horizontal deflection value using a signal and an input horizontal synchronization signal Hsync, and a digital / analog for digital / analog conversion of the horizontal deflection value generated in the horizontal deflection value generator 306. The output signal of the analog converter 308, the horizontal low pass filter 310 for filtering the output signal of the digital / analog converter 308 to a predetermined frequency band, and the output signal of the horizontal low pass filter 310 are increased to a predetermined amplification ratio. A vertical deflection vertical position counter section 303 for determining the length of each vertical section using a horizontal clock signal (pixel) clock provided from the bus decoder 301, and a bus decoder 301. Vertical slope control unit 305 for controlling the slope of the vertical deflection wave by receiving the linear or increase / decrease (up / down) information included in the output deflection change information, and the output signal of the vertical slope control unit 305 And a vertical deflection value generator 307 for generating a vertical deflection value using an input vertical synchronization signal Vsync, and a digital / analog for digital / analog conversion of the vertical deflection value generated in the vertical deflection value generator 307. The output signal of the converter 309, the horizontal low pass filter 311 for filtering the output signal of the digital / analog converter 309 to a predetermined frequency band, and the output signal of the horizontal low pass filter 311 are amplified at a predetermined amplification ratio. It consists of a current amplifier (313).

In the deflection position and ratio adjusting apparatus of the present invention according to such a configuration, the entire screen is divided into a plurality of sections in the horizontal and vertical directions by the microprocessor 100, and the deflection is performed over each section.

Of course, if the conversion control data memory is sufficient and the change in the slope of the change rate is severe and there is no problem in the loss of the image quality, processing can be performed even for each pixel unit. Process each unit of a plurality of preset sections.

That is, the screen is divided into 64 sections horizontally and 64 sections vertically. Each section also has a section length rather than an equal interval, and in the embodiment of the present invention, each section can be freely adjusted in units of 1 to 64 pixels (or vertically, a line). Therefore, no matter how rapidly the deflection ratio changes, the visual sense almost does not feel the boundary.

The bus decoder 301 of FIG. 3 receives a bus input from the microprocessor 300 in series and stores necessary data in each horizontal vertical 64 section. Then, when the corresponding block (a square consisting of horizontal and vertical sections is called a block), the stored data receives how much to adjust the slope of the horizontal or vertical deflection wave.

Here, the horizontal deflection pixel counter unit 302 counts the length of each horizontal section with a pixel clock, and if the carry occurs, the end of the section is notified and the count is progressed to the next horizontal section.

Similarly, the vertical deflection vertical position counter unit 303 counts the length of each vertical section by the horizontal synchronous signal, and when the carry is generated, the end of the section is notified and the count is moved to the next vertical section.

The horizontal slope control unit 304 receives linear or increase or decrease information from the bus decoder 301 to control the slope of the horizontal deflection wave. Then, when the horizontal deflection value generated by the horizontal deflection value generator 306 is changed into an analog value by the digital / analog converter 308, this is the horizontal deflection at the desired ratio of the image displayed via the horizontal low pass filter 310. It becomes a pulse to make.

In addition, the vertical slope control unit 305 controls the slope of the vertical deflection wave by receiving the slope or the increase or decrease information from the bus decoder 301. Then, when the vertical deflection value generated by the vertical deflection value generator 307 is converted into an analog value by the digital / analog converter 309, this is the vertical deflection at the desired ratio for the image displayed via the vertical low pass filter 311. It becomes a pulse to make.

On the other hand, having 64 intervals means that the sign of the slope of the deflection pulse can be changed up to 64 times, so that the curve of the 64th order can be formed, which means that the period of the sine wave can be repeated up to 32 times.

Therefore, the horizontal low pass filter 310, for example, assumes that each section is equally spaced, and has a scanning line of 60 Hz and 525 lines of 31.5 kHz x 32 = about 1 MHz or more (because it increases further when not equally spaced). You will have a band. The vertical low pass filter 311 has a band of 60 Hz x 32 = about 2 kHz or more. However, as shown in FIG. 6, when the vertical deflection varies depending on the horizontal section (when the deflection current can flow backward during scanning), the vertical deflection is about 1 MHz or more.

4 is a block diagram illustrating a format of a bus having the amount of deflection change information output from the microprocessor 300.

Referring to FIG. 4, the bus having the deflection change information output from the microprocessor 300 may include a vertical / horizontal deflection display section 321 for distinguishing whether later values are values for horizontal deflection or vertical deflection. ), A section definition display section 322 for discriminating whether it belongs to a horizontal section of horizontal deflection or vertical deflection, or a vertical section, and a section number display section 323 for indicating a selection section within a preset range; , The slope display section 324 for distinguishing whether the deflection is implemented, the increase / decrease display section 325 for increasing or decreasing the slope of the deflection wave according to the state of the slope display section 324, and the current slope It consists of a section length display section 326 for determining how many pixels (or as many lines as vertical) the same slope is to be maintained.

Here, the horizontal / vertical deflection display section 321 is composed of 1 bit, and distinguishes whether subsequent values are values to be applied to horizontal deflection or values to be applied to vertical deflection. In addition, the interval definition display section 322 is composed of 1 bit, and even in the horizontal deflection, since the ratio is horizontally deflected at different positions vertically, it serves to distinguish between the horizontal section and the vertical section of the horizontal deflection.

The section number display section 323 is composed of 6 bits, and serves to indicate a section of 0 to 63 (or 1 to 64).

When the slope display section 324 is 1 serves to keep the slope constant. At this time, the increase or decrease display section 325 is ignored. However, as long as the slope display section 324 is 0, when the increase or decrease display section is 1, the slope of the deflection wave is increased.

The section length display section 326 determines how many pixels (or how many lines in the case of vertical) the same slope is used as the current slope, and this value is the pixel counter unit 302 for horizontal deflection shown in FIG. 3. Is a load value or a load value of the vertical position counter 303 for vertical deflection.

Referring to FIG. 5, the operation of the bus decoder for horizontal deflection is as follows.

In the present invention, since the horizontal deflection is different for each vertical section even within the horizontal deflection, a 6 bit x 64 memory (Flip-Flop) 336 is separately provided. A 64 x 1 mux 339 is selected for each vertical section, and this value is loaded into the horizontal deflection line counter 341 so that the carry of the horizontal deflection line counter 341 after When it occurs, the vertical section is finished and the clock of the modulo-64 counter (MC32) acts as a clock so that the output of this counter (MC32) is 6 bits 64 x 1 mux (339) and 8 bits for vertical section selection. Have the next input of the 64 x 1 mux (338a-338n) selected.

Since the 8-bit data in the selected vertical section has 64 kinds of conversion data in each horizontal section, when the carry of the horizontal deflection pixel counter section 302 enters, it is horizontally passed through the modulo-64 counter MC31. The section number will be output. With this value, the 64 x 1 mux 340 for horizontal section selection is selected to increase or decrease the slope, the slope value and the current 6-bit value (ie the horizontal length of the current block) to go to the next block. It is output as a load value of the deflection pixel counter section 302.

In the same way as for the horizontal deflection, the carry of the vertical position counter part 303 for the vertical deflection is input in the same manner as the horizontal deflection, and the vertical section is selected by the modulo-64 counter MC33.

In the present invention, as shown in Figs. 7a to 7b, the vertical and horizontal blocks for vertical deflection and the vertical and horizontal blocks for vertical deflection are separately provided, but in Fig. 5, each vertical section is divided only in the horizontal deflection. In the case of vertical deflection, all horizontal sections are represented as a constant ratio conversion. However, to further extend this, the bus decoder shown in FIG. 6 is configured to change the conversion ratio for each horizontal section even in the vertical deflection.

The shape of each block can be arbitrarily determined by the section length data for the width and length. Here, for convenience, all blocks should not overlap each other and there should not be empty areas, so the vertical lengths of the horizontal sections along one vertical section are made constant. This is because the deflection beam of the CPT proceeds in order from left to right and from top to bottom, but this does not prevent the horizontal straight line from bending up and down. The configuration of FIG. 6 makes it possible to change the horizontal inclination of the vertical deflection as shown in FIG. 14.

8 is a configuration diagram of the horizontal or vertical deflection slope controllers 304 and 305. Here, the increase / decrease counter 368 is driven by receiving a tilt or an increase / decrease command from the bus decoder 301.

The output signal of this counter 368 then acts as a step of the counter 369. Therefore, the step can be both + and-, and given the slope, the step control output increases linearly while maintaining the current step. An example of this control output is shown in FIG. 12A.

For reference, since the step is sufficiently smaller than the increase step of the increase / decrease counter 375 which produces the output of the sawtooth data of FIG. 9, the slope of the deflection changes relatively slowly, and at least when the digital deflection signal is digital / analog converted. It should be more than 10 bits, rather than the number of pixels per horizontal scan line (the number of lines on the screen for vertical deflection).

The sawtooth data signal output from the increase / decrease counter 375 of FIG. 9 is combined with the slope control input signal and the adder 377 to represent a waveform as shown in FIG. 12C.

Here, when the slope control input signal is negative, the absolute value must be smaller than the inclination of the sawtooth wave. When the traveling direction of the deflection wave is reversed in the middle of the screen, the previous image, the current image, and the original direction are deflected. Since the images of this progression are shown as three overlapping results, care must be taken not to see this phenomenon in order to see all the images.

In the maximum deflection value comparison unit 379 of FIG. 9, when the digital value corresponding to the end point of deflection exceeds the boundary, the upper and lower horizontal scan lines do not coincide with each other. Tremors). However, this may be ignored for scrambling effects of the screen, but to prevent this phenomenon, it is necessary to select the lower input of the 2x1 mux 378 to maintain the current digital deflection signal when the boundary exceeded signal occurs. have.

Also, dividing the maximum deflection value by the sync interval width, this reduction step produces a sawtooth wave that allows the deflection value to return to the starting point during the return period. Again, to achieve a scrambling effect, you can ignore the starting boundary and choose a fixed decrement step value.

In the present invention, in order to conveniently use the counter, the maximum deflection value is regarded as the deflection value of the point where the deflection ends, and the value of the point where the deflection starts is set to the minimum value.

FIG. 10 shows how the flip-flop arrays 335a-335n of FIG. 5 store 8-bit data by dividing the horizontal section and the vertical section. That is, when the outputs of the decoders representing the vertical k-th section and the horizontal l-th section become high level at the same time, the corresponding selection signal of the 2x1 mux 380 becomes high level so that 8-bit data is 8-bit flip-flop. 388, otherwise, the current value is continuously fed back to maintain its value.

FIG. 11 illustrates an example in which flip-flop memory 388 is used instead of the 64 x 64 8-bit flip-flop arrays 335a-335n shown in FIG. 5, which is increased / decreased by a given length in units of blocks. It is a kind of 2-bit field memory because it stores slope information.

In addition, since 2-bit data is stored only in the vertical direction for vertical deflection, the flip-flop memory 390 may use a 2-bit line memory in the vertical direction. However, as shown in FIG. 6, when the conversion ratio is changed by placing a horizontal section even in the vertical deflection, a 2-bit field memory must be used as in the horizontal deflection.

In this case, two-bit data necessary for generating a horizontal deflection value is to be stored in the flip-flop memory only for the horizontal scanning valid period for horizontal deflection, and two bit data for vertical deflection is stored only for the vertical scanning valid period for vertical deflection. Just do it.

FIG. 12C actually shows a deflection waveform in which the ratio conversion of the image is possible by adding the slope control output shown in FIG. 12A and the sawtooth wave output shown in FIG. 12B.

13A to 13C show images when the aspect ratio is converted by using a horizontal deflection pulse obtained in FIG. 12C and a vertical deflection pulse constant in the horizontal direction without a negative slope.

However, if the inclination is changed according to the horizontal section even in the vertical deflection using the decoder shown in FIG. 6, the vertical deflection pulse has a negative inclination, resulting in the vertical position being changed up and down even during a horizontal scan line as shown in FIG. 14. . In this way, the image when the screen is vertically shifted up and down along the horizontal section is shown in Figure 15b.

FIG. 16 is a block diagram of another embodiment of a deflection value generation counter for generating a triangular wave deflection pulse to enable bidirectional scanning using the digital deflection wave generation principle according to the present invention.

In Fig. 16, the slope control input during normal deflection (left to right) is stored in the line memory, and the reverse direction scan is read backwards (with decreasing address) and used as a deflection wave (triangle wave) slope control input during reverse scanning. Just do it. That is, the sum of the tilt control input of the symmetrical triangular wave as shown in FIG. 17A and the triangular wave output scanning in the opposite directions by 50% of the horizontal synchronization period as shown in FIG. During the ratio conversion, a deflection pulse capable of bidirectional scanning is generated.

In this case, the video signal is also stored in the line memory and read at twice the write clock speed. 50% of the 1H period is read while increasing the address in the normal direction, and the remaining 50% is read while the address is decreased, and not read during the blank period. You can rest without.

This method doubles the scanning line, reduces the line flicker, and keeps the horizontal scan frequency at its original frequency (15.7 kHz for NTSC signals), so you can double scan without using the double scan CPT. Advantageously, since the reverse scanning line does not overlap with the forward scanning line, good image quality can be obtained without deflection by motion detection.

The present invention can freely change the shape of an image by generating a pulse of deflection in an arbitrary form and scanning the image at an arbitrary time rate at a desired position in displaying the image signal on a two-dimensional display device using a deflection such as CPT. Make sure

Therefore, by using this apparatus, not only can freely generate horizontal and vertical deflection waves (sawtooth waves) using digital signal processing, but also can be changed at any time using bus control to create and provide a video signal of a desired shape. Can be.

Claims (14)

In an image display device for displaying an input image having an image size on a screen divided into a plurality of horizontal section or vertical section set in advance, A microprocessor for generating deflection change information for each block unit in which an input image is formed by overlapping the horizontal section and the vertical section; A bus decoder for receiving and decoding the deflection change amount information; A deflection for determining a horizontal and / or vertical deflection change amount of the corresponding block in a predetermined order using the decoded deflection change amount information, and generating a deflection signal for increasing and / or decreasing the horizontal and / or vertical deflection value therefrom. Deflection position and rate control device, characterized in that consisting of a control unit. The apparatus of claim 1, wherein the deflection conversion information output from the microprocessor is generated by a user input signal. The apparatus of claim 1, wherein the block is selected within 1 to 64 pixel units in the horizontal section and 1 to 64 line units in the vertical section. The horizontal deflection pixel counter unit of claim 1, wherein the deflection control unit comprises: a horizontal deflection pixel counter unit configured to determine a length of each horizontal section using a pixel clock provided from the bus decoder; A horizontal slope controller for receiving a linear or increasing or decreasing information included in the deflection change amount information output from the bus decoder to control the slope of the horizontal deflection wave; A horizontal deflection value generator for generating a horizontal deflection value using an output signal and an input horizontal synchronization signal of the horizontal slope controller; A vertical deflection vertical position counter unit for determining a length of each vertical section with a pixel clock provided from the bus decoder; A vertical slope control unit for controlling the inclination of the vertical deflection wave by receiving inclination or increase or decrease information included in the deflection change amount information output from the bus decoder; And a vertical deflection value generator for generating a vertical deflection value by using an output signal and an input vertical synchronization signal of the vertical slope controller. The apparatus of claim 1, wherein the bus decoder comprises at least one flip-flop array or a flip-flop memory to store the deflection change amount information. 6. The apparatus of claim 5, wherein the flip-flop array or the flip-flop memory is a 2-bit field memory or a 2-bit line memory. The display apparatus of claim 1, wherein the data format of the deflection change information output from the microprocessor comprises: a vertical / horizontal deflection display section for distinguishing whether subsequent values are values to be applied to horizontal deflection or values to be applied to vertical deflection; A section definition display section for discriminating whether it belongs to a horizontal section or a vertical section of horizontal deflection to vertical deflection; A section number display section for indicating a selected section within a preset range, Slope display section for discriminating whether deflection is implemented, An increase / decrease display section for increasing or decreasing the slope of the deflection wave according to the state of the slope display section; And a section length display section for determining how many pixels and how many lines to maintain the same tilt with the current tilt. The deflection method of claim 4, wherein the horizontal slope control unit or the horizontal slope control unit includes at least one increase / decrease counter driven according to the slope provided from the bus decoder to the increase / decrease information on the slope. Position and proportioning device. 5. The apparatus of claim 4, wherein the horizontal deflection value generating unit and the vertical deflection value generating unit are an adder for adding the slope control signal and the increased or decreased sawtooth wave data output from the horizontal slope control unit or the horizontal slope control unit; And a maximum deflection value comparator configured to receive the output signal of the adder and compare whether the end point of deflection has been reached. 10. The deflection position and ratio adjusting device according to claim 9, wherein dividing the maximum deflection value by the synchronization section width provides a sawtooth wave in which the increase or decrease step can return the deflection value to the time point during the sphere section. 5. The method of claim 4, wherein the horizontal deflection value generating portion or the vertical deflection value generating portion stores the image signal under the control of the output signal of the horizontal to vertical slope control unit during normal deflection, and reversely stores the stored image signal during reverse scanning. One or more line memories, An adder for adding the slope control signal and the increased or decreased sawtooth wave data output from the horizontal slope control unit or the horizontal slope control unit; And a maximum deflection value comparator configured to receive an output signal of the adder and compare whether the end point of deflection has been reached. 12. The apparatus of claim 11, wherein the sawtooth wave data is scanned in opposite directions by 50% of a horizontal synchronous period. An image display method for displaying an input image having an arbitrary image size on a screen divided into a plurality of preset horizontal sections or vertical sections, Inputting a deflection change signal for a desired area of the screen; Generating deflection change amount information for each block unit formed by overlapping the horizontal section and the vertical section in a predetermined order according to the input signal; Receiving and decoding the deflection change amount information; Determining horizontal and / or vertical deflection coefficient change amounts of the corresponding block in a predetermined order by using the decoded deflection change information, and generating horizontal and / or vertical deflection signals that increase or decrease the deflection value therefrom. Deflection position and ratio adjustment method characterized in that made. The method of claim 13, wherein the generating of the horizontal and / or vertical deflection signal is performed. Storing the deflection change information; Determining the length of the horizontal section and / or the vertical section by receiving the deflection change amount information; And generating a horizontal and / or vertical deflection signal by controlling a deflection value according to the slope included in the deflection change information and the increase / decrease information of the inclination information.