KR100598948B1 - Method for zooming image of television - Google Patents

Abstract

The present invention relates to a method for adjusting a screen zoom of a television. When a user stores a video screen to be enlarged, the user can automatically enlarge and display an input video screen when the user stores a video screen that is similar to a stored ratio. Even if you don't operate the zoom function individually, you can see more detail by automatically zooming in on the desired screen.

Screen size, zoom function, luminance signal, match

Description

How to adjust the screen zoom of a television {METHOD FOR ZOOMING IMAGE OF TELEVISION}             

1 is a block diagram showing the configuration of a general digital television receiver currently used.

Figure 2 is a block diagram showing a device to which the screen zoom adjustment method of the television according to the present invention is applied.

3 is a flowchart illustrating a screen zoom control method of a television according to the present invention.

   -Explanation of symbols for the main parts of the drawings-

1: antenna 2: tuner

3: IF amplification unit 4: P / S separation unit

5: voice detector 6: image detector

7: remote control unit 8: receiving unit

9, 100: microprocessor 10: voice processing unit

11: voice amplifier 12: speaker

13: analog / digital converter (A / D converter)

14: image information management unit 15: image information storage unit

16: digital image adjusting unit 17: image processing unit

18: Digital / Analog Converter (D / A Converter)

19: CRT drive unit 20: CRT

21: luminance signal separation unit 22: comparison image storage unit

23: zoom function control

The present invention relates to a method for adjusting a screen zoom of a television, and more particularly, when a user stores a video screen to be enlarged, when the user stores a video screen similar to the stored video screen by more than a predetermined ratio, the video screen is automatically enlarged and displayed. It is about how to adjust the screen zoom of a television so that you can see the screen in more detail.

The digitalization of information spread from the computer industry to the information and communication industry has recently been extended to television broadcast signals. Digitization of television broadcast signals will realize a two-way multimedia era in which a new paradigm that is fused with technology in the computer and communication fields is realized.

Digital broadcasting is centered around the European Digital Video Broadcasting (DVB) standard and the ATV (Advanced TV) standard of the US FCC. It complies with the ATSC standard that the United States decided as the next generation TV method, replacing the NTSC standard that symbolizes existing analog TV.

The difference between digital television and traditional analog television is divided into picture quality, sound quality, aspect ratio and others as follows.

First, in terms of image quality, an analog TV using 525 horizontal scanning lines has a horizontal resolution of about 330 lines that determines viewing quality, whereas a high definition (HD) digital TV has a horizontal resolution of about 700 lines. It is more than twice as clear as the TV.

In terms of sound quality, conventional analog TVs provide only two channels of stereo sound, while digital TVs using AC3 technology provide 5.1 channels of stereo sound that can be enjoyed in theaters.

In terms of the aspect ratio, the conventional analog TV has an aspect ratio of 4 to 3, whereas digital TVs have a wide aspect ratio of 16 to 9, similar to a theater screen.

What distinguishes digital TV from analog TV is not only a dramatic change in picture quality and sound quality. Digital TVs are data compatible with serial interfaces implemented via IEEE 1394 interface technology, such as digital versatile disc (DVD) players, digital camcorders, and digital VCRs that process digital signals as well as PCs.

Therefore, digitalization of broadcast signal will accelerate the convergence of communication, computer, and broadcasting due to the spread of media using the compressor method, and will be internationalized and multi-channel as a single media with complex functions. Above all, introducing a digital system to a broadcast signal can provide various data services that could not be realized in analog. In addition, the digitization of the broadcast signal is transmitted by multiplexing and transmitting information in the vertical retrace period of the TV video signal or by using a separate channel for character information, image information, product information, and broadcast programs for television or computer owners. Data broadcasting, which is a new media service that provides multimedia information such as an electronic program guide (EPG), may be implemented.

On the other hand, since digital television processes a video screen in a digital manner, a still picture and a zoom function of the video screen may be applied.

1 is a block diagram showing the configuration of a general digital television receiver currently used.

As shown here, the tuner 2 generates and outputs a predetermined intermediate frequency signal from the broadcast signal received through the antenna 1, and the IF amplifier unit amplifies the intermediate frequency signal output through the tuner 2 ( 3) and a P / S separation unit 4 which separates the video intermediate frequency signal PIF and the audio intermediate frequency signal SIF from the broadcasting intermediate frequency signal output from the IF amplifier 3, for example, a surface acoustic wave filter. Is made of.

Then, the microprocessor 9 for the voice detector 5 for detecting the voice signal from the voice intermediate frequency signal output from the P / S separation unit 4, and the voice signal output from the voice detector 5 According to the control signal from the voice processor 10 for performing voice processing such as bass, treble, volume, etc., and amplified voice signals processed by the voice processor 10, the speaker 12 It consists of a voice amplifier 11 for outputting.

In addition, the video detector 6 detects a video signal from the video intermediate frequency signal output from the P / S separation unit 4, and converts the analog video signal output from the video detector 6 into a digital video signal. Control of the microprocessor 9 with respect to the digital video signal output from the analog / digital converter 13, the video information storage 15 for storing the digital video signal, and the analog / digital converter 13 On the basis of the signal, the image information management unit 14 for sequentially storing the image information storage unit 15 in a predetermined unit, and the digital output through the image information management unit 14 in accordance with the control signal of the microprocessor 9 A digital image adjusting unit 16 for processing a still image function or a zooming function with respect to the image signal or the image signal stored in the image information storing unit 15, and the digital image adjusting unit 16 output from the digital image adjusting unit 16. Color, Tint, Brightness, etc. are processed according to the control signal from the microprocessor 9 with respect to the full image signal and corresponding R (Red), G (Green), B (Blue) ) And an image processor 17 for generating and outputting a luminance (-Y) signal, a digital / analog converter 18 for converting a digital image signal output from the image processor 17 into an analog image signal, and outputting the analog image signal. The CRT driver 19 drives the CRT 20 based on the color tone signals R, G, and B and the luminance (-Y) signal output from the analog converter 18.

On the other hand, the remote control device 7 for remotely instructing the overall operation of the television receiver, the receiving unit 8 for converting and outputting an infrared signal output from the remote control device 7 into an electric code signal, and the entire television receiver. It consists of a microprocessor 9 for controlling.

In the digital television configured as described above, the video signal of the broadcast signal received through the antenna 1 is converted into a digital signal, image processed, and then converted into an analog signal and outputted to the CRT 20. In this case, when the zoom function is selected by the user, the microprocessor 9 controls the digital image adjusting unit 16 to execute the zoom function on the received image signal.

As another method, the horizontal / vertical deflection adjustment data for adjusting the horizontal / vertical deflection of the horizontal / vertical deflection coil to change the deflection state of the image screen to adjust the screen size is stored in the memory and the memory for a predetermined image section. The method of adjusting the size of the screen by varying the horizontal / vertical deflection state by the horizontal / vertical deflection adjustment data stored in the is also used.

In this way, if the user wants to watch a video screen of his / her own desire while watching television, selecting a zoom function allows the user to watch the video in detail by adjusting the size of the video screen.

In particular, when watching sports broadcasts such as soccer, you may want to see more details of the scene where the goal is entered, or you may want to see the blackboard that is lectured in the education broadcast in more detail.

However, since the zoom function for adjusting the size of the video screen operates only when the user selects the zoom function on the desired video screen while watching television, the zoom function cannot be efficiently used.

The present invention was created to solve the above problems, and an object of the present invention is to automatically enlarge and display an input video screen when the user stores a video screen that the user wants to enlarge when the image screen is similar to a predetermined ratio or more. By providing a way to adjust the screen zoom of a television so that you can see the desired video screen in more detail.

According to an aspect of the present invention, there is provided a method of adjusting a screen zoom of a television, the method comprising: selecting a comparison image for operating the auto zoom function, separating and storing the luminance signal of the selected comparison image, and auto zooming Separating the luminance signal from the input image signal during operation, comparing the image screen and the comparison image by the separated luminance signal, and operating the zoom function when the comparison image and the matching degree are above a certain ratio. Characterized in consisting of steps.

In the present invention, the zoom function is characterized in that it operates according to the magnification of the screen, the magnification area and the holding time when the screen zoom function is set.

In addition, in the present invention, a certain ratio is characterized in that 70%.

According to the present invention, when the user selects a comparison image for operating the auto zoom function, the image screen is stored by the luminance signal of the selected comparison image and then compared with the image screen by the luminance signal of the input image screen. If the coincidence is over a certain ratio, the zoom function is activated and the screen is enlarged according to the zoom function set by the user.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only and the same parts as in the conventional configuration using the same reference numerals and names.

2 is a block diagram showing a device to which the method for adjusting the screen size of a television according to the present invention is applied.

Luminance for separating and outputting the luminance signal from the CVBS (Composite Video Blanking Sync) video signal of the analog video signal output from the video detector 6 for detecting a video signal of a television having a zoom function as shown here The signal separator 21, the comparison image storage unit 22 for storing the image screen output from the luminance signal separator 21, and the image screen output from the luminance signal separator 21 according to the user's selection To store the image in the comparison image storage unit 22 and compare the image screen input through the luminance signal separation unit 21 with the image screen stored in the comparison image storage unit 22 to determine whether the image is similar or not. It further comprises a zoom function control unit 23 for operating.

In the present invention, the image screen using the luminance signal from which the color signal is removed from the image signal is used to determine the overall shape of the image screen.

Therefore, the luminance signal separation unit 21 separates the luminance signal and the color signal to remove the color signal, and converts only the luminance signal into a digital signal through an A / D converter (not shown) and stores it in the comparison image storage unit 22. After that, the image screen stored in the comparison image storage unit 22 and the input image screen are compared with each other, and if a similar signal is output from the zoom function control unit 23 to the microprocessor 6.

At this time, the setting of the zoom function is to operate the zoom function on the microprocessor 6 when the zoom size, the zoom area and the holding time of the screen are set in the same way as the zoom function is set in the television having the zoom function.

In addition, when the user selects the comparison image, the storing operation for the corresponding image is controlled to be stored in the comparison image storage unit 22 by the zoom function control unit 23 by a control signal transmitted from the microprocessor 6.

This will be described in detail with reference to a flowchart for explaining a screen zoom adjusting method of the television illustrated in FIG. 3.

First, the user selects a comparison image for operating the auto zoom function (S10).

At this time, through the microprocessor 6, the user also sets the magnification of the screen, the magnification area and the holding time.

When the zoom adjustment is made, the control signal is output from the microprocessor 6 to the zoom function controller 23.

Then, the luminance signal separation unit 21 separates the luminance signal and the color signal for the selected comparison image, removes the color signal (S20), and then digitizes and stores the comparison image in the comparison image storage unit 22 (S30). .

Then, when the auto zoom function is activated (S40), the luminance signal is separated from the image signal input through the luminance signal separation unit 21 (S50), and the comparison stored in the comparison image storage unit 22 while the color signal is removed. It is compared with the image (S60).

In this case, when the degree of agreement between the input image and the comparison image is 70% or more (S70), it is determined to be similar to each other and outputs a control signal to the microprocessor 6 to set the zoom function. By zooming in according to the enlarged size to maintain a zoom function for a predetermined time for the input image (S80).

In this case, even when the operation of the auto zoom function is stopped while the zoom function is maintained (S40).

In this way, the screen zoom function can not only enlarge the digital image screen by digital method but also change the horizontal / vertical deflection state by the horizontal / vertical deflection adjustment data for adjusting the horizontal / vertical deflection of the horizontal / vertical deflection coil. You can also resize the screen.

As described above, in the present invention, when a user stores a video screen that the user wants to enlarge, the user automatically operates the zoom function for a specific screen by automatically expanding and displaying the input video screen when the stored video screen is similar to a predetermined ratio or more. Even if you do not want to automatically enlarge the desired video screen has the advantage that you can see in more detail.

Claims (3)

Selecting a comparison image for operating the auto zoom function; Separating and storing the luminance signal of the selected comparison image; Separating the luminance signal from the image signal input during the auto zoom function; Comparing the image screen and the comparison image by the luminance signal separated from the above; Operating the zoom function when the degree of agreement with the comparison image is equal to or greater than a predetermined ratio. Screen zoom control method of a television, characterized in that consisting of. The method of claim 1, wherein the zoom function operates according to an enlarged size of the screen, an enlarged area, and a retention time when the screen zoom function is set. The method of claim 1, wherein the predetermined ratio is 70%.

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