KR19990026700A - Device and Method of Magnifying Video Screen - Google Patents

Abstract

The present invention relates to an apparatus and a method for enlarging a video screen in a television, wherein a predetermined range is set for the displayed video screen of the television to be enlarged, and if the need not be enlarged among the set parts, the corresponding part is set again. The present invention relates to an apparatus and a method for enlarging an image screen, thereby deleting only the remaining image screen. In the reproduction of video screens of general televisions, the horizontal and vertical deflection operations of the video scanning beams by the horizontal and vertical deflection coils are performed by the horizontal and vertical deflection motions fixed by the constant horizontal and vertical deflection drive pulses. It is not possible to adjust the screen size for the part. According to the present invention, after the television displays the OSD display screen on the screen and sets the specific portion of the video screen displayed on the CRT by operating the OSD adjusting means, the zoom driving operation in the horizontal direction and the vertical direction of the enlargement correction is performed. In this case, the set specific portion is enlarged, and if there is a portion that does not need to be enlarged among the set specific portions, the range of the corresponding portion is designated on the OSD display screen and the corresponding portion is set using the erase setting means. Afterwards, the present invention provides an apparatus and a method for enlarging an image screen to be erased through a filtering process so that only the remaining part is enlarged and displayed through the enlargement correction process of the enlargement correction unit.

Description

Device and Method of Magnifying Video Screen

The present invention relates to an apparatus and a method for enlarging a video screen in a television, wherein a predetermined range is set for the displayed video screen of the television to be enlarged, and if the need not be enlarged among the set parts, the corresponding part is set again. The present invention relates to an apparatus and a method for enlarging an image screen, thereby deleting only the remaining image screen.

In general, a television is provided with a broadcast signal of a broadcast channel tuned by a viewer among a plurality of broadcast channels transmitted from a plurality of television stations through a tuner and then subjected to image signal processing and audio signal processing, respectively. Is being played through. In the receiving tube, the received video signal is formed by the respective RGB electron guns to form a scanning beam by combining the luminance signal and the color signal in the image processing process, and is reflected on the RGB fluorescent surface through the shadow mask or the aperture grille of the CRT. The picture screen sent from the transmitting side is reproduced, and the reproduction of the picture screen requires the horizontal deflection operation and the vertical deflection operation by the horizontal deflection coil and the vertical deflection coil installed in the CRT.

In the horizontal deflection operation and the vertical deflection operation of the image scanning beam by the horizontal deflection coil and the vertical deflection coil of the television, constant horizontal deflection drive pulses and vertical deflection drive which are generated as a result of oscillation operation by the horizontal and vertical synchronization signals. Since the horizontal deflection operation and the vertical deflection operation are performed by the pulse, the screen size of the specific part cannot be adjusted even if the viewer wants to enlarge the specific part while watching the broadcast program. There is a problem that it is accompanied by a significant inconvenience and exclusion of active in detail.

The present invention has been invented to solve the above problems, and an object of the present invention is to set a portion of the image screen by utilizing a partial setting function of the image screen and an enlargement function of the screen size, and then the horizontal direction of the partial screen. The apparatus and method for enlarging the size of the video screen and the size of the vertical direction, and if there is a portion of the set video screen that does not need to be enlarged, resets the corresponding portion and erases only the remaining portion. To provide.

1 is a block diagram showing an apparatus for magnifying a video screen according to the present invention;

FIG. 2 is a block diagram illustrating an image erasing and image magnifying unit, which is a main part of FIG.

3 is a block diagram showing an enlarged correction unit which is a main part of FIG.

4 is a flowchart illustrating a method of enlarging an image screen according to the present invention.

5A is an exemplary diagram illustrating a state of designating an image screen to be enlarged using an OSD display screen according to the present invention.

5B is an exemplary view illustrating an enlarged state of the video screen shown in FIG. 5A.

FIG. 5C is an exemplary diagram showing a state of designating a partial video screen that does not need to be enlarged among the video screens shown in FIG. 5A; FIG.

5D is an exemplary diagram illustrating a state in which some video screens shown in FIG. 5C are erased and enlarged.

* Explanation of symbols for main parts of the drawings

100: antenna 110: tuner circuit

120: voice IF unit 130: voice signal amplifier

140: speaker 150: video IF unit

160: video signal amplifier 170: main IC

180: Winner Drive 190: Winner

200: synchronization separation unit 210: OSD generation unit

220: image signal processing unit 221: signal processing circuit unit

222: A / D converter 223: Clock generator

224: first image memory unit 225: memory control unit

226: second image memory unit 227: D / A conversion unit

230: filter unit 241: horizontal and vertical correction

242: horizontal drive unit 243: horizontal output unit

244: horizontal deflection coil 245: flyback transformer

246: vertical drive unit 247: vertical output unit

248: vertical deflection coil 250: microcomputer

260: data memory 271: image expansion key

272: OSD control key 273: Zoom setting key

274: OSD clear key 275: Mute setting key

Hereinafter, with reference to the accompanying drawings will be described a specific embodiment for achieving the above object of the present invention.

1 is a block diagram illustrating an apparatus for enlarging an image screen according to the present invention.

Referring to FIG. 1, the present invention performs a high frequency amplification on an image signal of a channel selected for display on a screen among high frequency signals received through an antenna 100, and mixes with an oscillation frequency oscillated by channel selection. A tuner circuit unit 110 for converting to an intermediate frequency for easy amplification and then amplifying to generate a composite video signal, an image IF unit 150 for intermediately amplifying the image signal applied from the tuner circuit unit 110, and Between the image signal amplifier 160 and the main IC 170, and an image signal amplifier 160 for amplifying the complex video signal applied by the intermediate frequency amplification from the image IF unit 150 to a signal level capable of signal processing A horizontal synchronization signal and a vertical synchronization signal are separated from the image signals output from the image signal amplifier 160 and applied to the microcomputer 250, the image eraser, and the expansion unit 230. The main IC 170 for demodulating and amplifying the video signal applied from the video signal amplifying unit 160 to the water pipe drive 180 to be displayed on the water pipe 190; A voice IF unit 120 for intermediately amplifying the voice signal applied from the tuner circuit unit 110 and a voice intermediate frequency signal from the voice IF unit 120 are demodulated and amplified and output to the speaker 140. The video signal processor 220 and the magnification correction unit 240 are controlled according to the audio signal amplifier 130 and the signal generated from the remote controller 270, and the data stored in the data memory unit 260 is read. Outputting the horizontal size adjustment data and the vertical size adjustment data for varying the size of the video screen by the microcomputer 250 applied to the enlarged correction unit 240 and the read enable signal RE of the microcomputer 250. A data memory unit 260 and the mi An image signal processing unit 220 for converting the image signal into a signal suitable for magnification correction and filtering according to the image processing control signal of 250 and applying it to the magnification correction unit 240 and the filter unit 230; An enlarged image that is enlarged and corrected horizontally and vertically in a horizontal direction and a vertical direction by varying the horizontal size adjustment data and the vertical size adjustment data required for the expansion of the image signal converted from the image signal processor 220 by the image screen enlargement signal of 250). A filter unit 230 for erasing the video screen by preventing the video signal from the video signal processor 220 from passing through the correction unit 240 and the video screen erase signal of the microcomputer 250; OSD generation unit 200 for outputting the OSD display screen to specify the video screen displayed on the screen of the television according to the OSD generation signal of 250, and the state of the video screen to the microcomputer (250) is confirmed An image enlargement key 271 for switching to the large mode, an OSD adjustment key 272 for adjusting the OSD display screen freely up, down, left and right to freely move the OSD display screen, and the OSD display screen An enlargement setting key 273 for setting the image screen designated by the first image memory unit 224 and the second image memory unit 226 to be stored, and an OSD erase key for disabling the OSD display screen displayed on the screen of the television. 274, and a remote controller 270 having an erasing setting key 275 for erasing the video screen designated by the OSD display screen.

Hereinafter, an operation of an embodiment of the present invention made as described above will be described in detail with reference to the accompanying drawings.

First, the composite video signal, which is a high frequency signal received from the antenna 100, is converted into an intermediate frequency that is tuned and tuned by the tuner circuit unit 110, and the image IF unit 150 is applied from the tuner circuit unit 110. The video signal is amplified by intermediate frequency. The image signal amplifier 160 connected to the image IF unit 150 amplifies the intermediate frequency-amplified image signal to the size of a signal for demodulation and applies it to the main IC 170, and the main IC 170. Is demodulated and amplified so as to be suitable for displaying on the receiving tube 190 the image signal applied from the image signal amplifier 160 and applied to the receiving tube drive 190. The synchronization separator 200 is connected between the image signal amplifier 160 and the main IC 170 to separate the synchronization signal required to reproduce the image sent from the transmitter as it is, and to output the image signal processor 220 and the microcomputer. Is applied to 250.

In addition, the voice signal output from the tuner circuit unit 110 is amplified by an intermediate frequency by the voice IF unit 120 is applied to the voice signal amplifier 130, the speaker 140 through the voice signal amplifier 130 ) Demodulated and amplified according to the output.

Here, when the magnification setting signal of the video screen is generated through the image magnification key 271 of the remote controller 270, the magnification setting signal of the video screen is microcomputed through a signal receiver (not shown) mounted in the system of the television. The microcomputer 250 applies the OSD generation signal to the OSD generator 210 so that the OSD display screen appears on the screen of the television. The OSD display screen is freely moved up, down, left, and right by the OSD adjustment key 272 to display the range of the video screen to be enlarged, and is enlarged by the enlargement setting key 273 provided in the remote controller 270. The picture screen is set. When the range of the video screen to be enlarged is set by the zoom setting key 273, the microcomputer 250 applies an image processing control signal to the video signal processor 220 to set the video screen to the first image memory unit 224. After being stored in the) to be changed into a signal form required for the enlargement correction, it is output to the enlargement correction unit 240 so that the enlargement correction in the horizontal direction and the vertical direction of the video screen is made.

On the other hand, a portion that does not need to be enlarged among the portions included in the range of the video screen to be enlarged by the enlargement setting key 273 is displayed in the range by the OSD display screen, and is enlarged by the enlargement setting key 273. Is set and a video mute signal is generated. The image erasing signal generated through the erase setting key 275 is applied to the microcomputer 250, and the microcomputer 250 applies the image processing control signal to the image signal processor 220. Accordingly, the image signal processing unit 220 stores the image screen set by the erasing setting key 273 in the second image memory unit 226 and converts the image screen into a signal type for erasing, and then the filter unit 230 is removed. Through the video signal constituting the video screen is not passed through.

FIG. 2 is a block diagram illustrating an image signal processor, which is a main part of FIG. 1, wherein the clock generator 222 generates a clock required for A / D conversion, and the A / D converter 222 of the memory controller 225. The image signal converted into a signal suitable for A / D conversion is converted into a digital data signal through the signal processing circuit unit 221 according to the control signal. The memory controller 225 supplies the digital image signal converted by the A / D converter 222 to the first image memory unit 224 when the image processing control signal applied from the microcomputer 250 is used for magnification correction. The image processing control signal applied from the microcomputer 250 is outputted to the second image memory unit 226 to be stored and output. In addition, the D / A converter 227 connected to the first image memory unit 224 and the second image memory unit 226 may control the first image memory unit (B) by a control signal of the memory controller 225. The digital data signal output from the 224 and the second image memory unit 226 is converted into an analog data signal.

3 is a block diagram illustrating an enlargement correction unit, which is a main part of FIG. 1, wherein the enlargement correction unit 240 receives a data signal from a microcomputer 230 to change a horizontal and vertical size of the image screen. The horizontal and vertical correction units 241 and 241 applied to the horizontal driving unit 242 and the vertical driving unit 246, respectively, receive horizontal screen data signals from the horizontal and vertical correction units 241, and are converted into horizontal deflection driving signals. The horizontal driving unit 242 and the horizontal deflection driving signal are applied from the horizontal driving unit 242 to generate a horizontal deflection current for the deflection driving of the horizontal deflection coil 244 and the high voltage generation operation of the flyback transformer 245. The vertical output unit 243 and the vertical screen data signal applied from the horizontal and vertical correction units 241 into a vertical deflection driving signal to be output through the vertical output unit 247. It is characterized by consisting of a portion (246).

Accordingly, the horizontal and vertical correction units 241 receive an enlargement control data signal for enlarging an image screen from the microcomputer 250 and receive a horizontal size data signal for enlarging the horizontal size of the image screen from the synchronization separator 200. The vertical size data signal, which is applied to the horizontal driver 242 together with the applied horizontal sync signal, to change the vertical size of the image screen, is applied to the vertical driver 246 together with the vertical sync signal applied from the sync separator 200. Will be authorized. The horizontal driver 242 receives a variable horizontal size data signal from the horizontal and vertical correction units 241 and amplifies the horizontal driver 242 to output a horizontal deflection drive to the horizontal output unit 243. The unit 243 generates a horizontal output current for the deflection driving of the horizontal deflection coil 244 and the high-voltage generating operation of the flyback transformer 245 to the water pipe drive 180 to be displayed on the water pipe 190. To enlarge the image screen in the horizontal direction.

In addition, the vertical driver 246 amplifies the data signal of the enlarged vertical screen applied from the horizontal and vertical drivers 241 so as to enable vertical deflection driving, and outputs it to the vertical output unit 247. Reference numeral 247 generates a vertical output current for vertical deflection of the vertical deflection coil 248 and outputs it to the water pipe drive 180 to be displayed on the water pipe 190 so that the image screen is enlarged in the vertical direction.

Next, a method of enlarging an image screen according to the present invention will be described with reference to FIG. 4.

First, a magnification mode for enlarging an image screen from the image expansion key 271 of the remote controller 270 is applied to the microcomputer 250 (step S1), and the microcomputer 250 switches the state of the image screen to the magnification mode. In step S2, when all the set video screens are enlarged, the video signal inputted by the A / D converter 222 is converted into a digital data signal (step S4). Further, the digital data signal applied from the A / D converter 222 is stored in the first image memory unit 224 (step S5), and is converted into an analog data signal through the D / A converter 227 again. (Step S6). The analog data signal converted by the D / A converter 227 is converted into a control data signal for expanding and changing the horizontal size and vertical size of the video screen applied from the microcomputer 250, and then the enlargement correction unit 240 Bar enlargement correction is performed, it is determined whether or not enlargement correction is properly performed (step S7). When the magnification correction is properly performed in step S7, the video screen is enlarged in the horizontal direction and the vertical direction (step S8). However, if the enlargement correction is not properly performed, the A / D conversion process by the A / D conversion unit 222 is repeatedly executed (step S4).

In addition, in the case of erasing a part of the screen without enlarging all the video screens set in step S2 (step S3), the A / D converter 222 is converted into a digital data signal (step S3). S9). The digital data signal output after being converted from the A / D conversion unit 222 is stored in the second image memory unit 226 (step S10), and is converted into an analog data signal through the D / A conversion unit 227 again. It is converted (step S11). Since the analog data signal converted by the D / A converter 227 is not passed through the filter unit 230 and is canceled, it is determined whether or not filtering is properly performed (step S12). If the filtering is properly performed in step S12, the set partial video screen is erased (step S13), and if the filtering is not done properly, the A / D conversion by the A / D conversion unit 222 is performed. The process is repeated (step S9).

5A and 5B are diagrams illustrating an enlarged state of the entire image screen set according to the present invention. When an enlarged image of the image displayed on the screen of the television is to be checked in detail, the remote controller 270 uses the television. After the operation state is changed to the magnification setting mode of the video screen, the OSD display screen appears. The OSD display screen is freely moved through the operation of the OSD adjustment key to designate a portion to be enlarged, and is set by the enlargement setting key 273. Accordingly, the set image screen is enlarged and displayed as shown in FIG. 5B through an image enlargement process of the enlargement correction unit 240.

5C and 5D are exemplary views showing a state in which a part of the set full video screen is erased and enlarged according to the present invention. After the full video screen to be enlarged by the zoom setting key 273 of the remote controller 270 is set, FIG. For some video screens that do not need to be enlarged, the range is designated by the OSD display screen and the range specified by the erase setting key 275 is set. Therefore, the partial image screen set by the erasing setting key 275 is erased as shown in FIG. 5D through the filtering process of the filter unit 230, and only the remaining image is enlarged and displayed.

As described above, in the present invention, when a television is watching a broadcast program and wants to zoom in on a specific portion of an image screen in detail, the microcomputer applies an OSD generation signal to the OSD generating unit so that an OSD display screen appears. After the specific part of the video screen displayed on the CRT is set through the operation of the OSD control key included in the remote controller, the specific part of the set part is enlarged by the enlargement driving operation in the horizontal direction and the vertical direction of the enlargement correction. There is an effect that is displayed. In addition, if there is a part that does not need to be enlarged among the set specific parts, the range of the corresponding part is designated by the OSD display screen and is set through the erasing setting key included in the remote controller. Since only the remaining part is enlarged and displayed through the enlargement correction process of the enlargement correction unit, the screen enlargement is made by the active selection of the viewer.

Claims (6)

A tuner circuit unit 110 for receiving a high frequency signal received through the antenna 100; An image IF unit 150 and an audio IF unit 120 for intermediately amplifying the video signal and the audio signal applied from the tuner circuit unit 110; An image signal amplifier 160 for amplifying a complex video signal applied by being amplified from the image IF unit 150 to a signal level capable of signal processing; A synchronization separator 180 for separating the synchronization signal from the image signal output from the image signal amplifier 160 and applying it to the screen controller 220 and the microcomputer 250; A main IC 140 for demodulating and amplifying the video signal applied from the video signal amplifier 160 to the water pipe drive 150 to be displayed on the water pipe 160; In the television comprising a voice signal amplifier 130 for demodulating the voice intermediate frequency signal amplified by the voice IF unit 170 to output through the speaker 140, The image signal processor 220 and the magnification correction unit 240 are controlled according to the signal generated from the remote controller 270, and the data stored in the data memory unit 260 is read and applied to the magnification correction unit 240. The microcomputer 250, A data memory unit 260 for outputting horizontal and vertical size adjustment data for varying the size of the video screen according to the read enable signal RE of the microcomputer 250; An image signal processor 220 for converting an image signal into a signal suitable for magnification correction and filtering according to the image processing control signal of the microcomputer 250 and applying it to the magnification correction unit 240 and the filter unit 230; The image screen enlarged in the horizontal and vertical directions by varying the horizontal size adjustment data and the vertical size adjustment data required for the enlargement of the image signal converted from the image signal processor 220 by the image screen enlargement signal of the microcomputer 250. An enlargement correction unit 240 to correct, A filter unit 230 for erasing the video screen by preventing the video signal from the video signal processor 220 from passing through in response to the video screen erase signal of the microcomputer 250; And an OSD generator (200) for outputting an OSD display screen for designating an image screen displayed on a screen of a television according to the OSD generation signal of the microcomputer (250). The image signal processor 220 of claim 1, wherein the image signal processor 220 receives a clock from the clock generator 222 for generating a clock required for A / D conversion and the clock generator 222, and the memory controller 225. An A / D converter 222 for converting an input video signal into a digital data signal and a digital data signal converted by the A / D converter 222 from the microcomputer 250. The memory control unit 225 outputs and stores the image processing control signal to the first image memory unit 224 in the case of enlargement correction, and outputs and stores the image processing control signal in the second image memory unit 226 in the case of erasing. And D / A conversion for converting the digital data signals outputted from the first image memory unit 224 and the second image memory unit 226 into analog data signals by the control signals of the memory control unit 225. It is characterized by consisting of a part 227 A device for expanding a video screen. The apparatus of claim 1 or 2, wherein the remote controller 270 adjusts the image enlargement key 271 for transmitting an enlarged mode switch signal to the television and the OSD display screen displayed on the television screen freely up, down, left, and right. An OSD adjustment key 272, an enlargement setting key 273 for storing the image screen designated by the OSD display screen in the first image memory unit 224 and the second image memory unit 226, and the OSD And an OSD clearing key (274) for disappearing the display screen and an erase setting key (275) for erasing the video screen designated by the OSD display screen. The magnification correction unit 240 receives a video screen magnification signal from the microcomputer 230 and applies a horizontal signal to the horizontal driver 242 and the vertical driver 246 to change the horizontal and vertical sizes of the video screen. And a vertical driver 241, a horizontal driver 242 for receiving a horizontal screen data signal from the horizontal and vertical carriers 241, and converting it into a horizontal deflection driving signal and outputting the horizontal deflection drive signal. A horizontal output unit 243 which receives a horizontal deflection driving signal and generates a horizontal deflection current for deflection driving of the horizontal deflection coil 244 and high voltage generation operation of the flyback transformer 245; 241 is a vertical driving unit 246 for converting the vertical screen data signal applied from the 241 into a vertical deflection driving signal to be output through the vertical output unit 247. Chi. The signal type according to claim 1, wherein the microcomputer 250 stores the video screen in the first image memory unit 224 when the entire video screen is enlarged by the zoom setting key 273. After converting to, the image is output to the enlargement correction unit 240 so that the image screen is enlarged and corrected in the horizontal and vertical directions, and a part of the entire image screen set by the enlargement setting key 273 is erased. In this case, the portion erased through the erase setting key 275 is stored and signal processed in the second image memory unit 226, and then output to the filter unit 230 so that the image signal cannot pass. And an image processing control signal for causing the image screen to be erased to the image signal processing unit (220). An enlarged mode signal input step S1 for transmitting an enlarged mode signal for enlarging an image screen from the remote controller 270; An enlarged mode determination step (S2) in which the enlarged image signal is determined in the enlarged mode signal input step (S1); An A / D conversion step (S4) in which the magnification mode is determined in the magnification mode determination step (S2) and the input video signal is converted into a digital data signal; A data signal storage step (S5) in which the digital data signal converted in the A / D conversion step (S4) is stored in the first image memory means; A D / A conversion step (S6) in which the digital data signal stored in the data signal storage step (S5) is converted into an analog data signal; The magnification correction determination step of determining whether or not magnification correction is properly performed after converting the analog data signal converted in the D / A conversion step (S6) into a control data signal that enlarges and changes the horizontal size and the vertical size of the video screen. (S7) and, An enlarged correction step (S8) of expanding the image screen in a horizontal direction and a vertical direction when the enlarged correction is properly performed in the enlarged correction determination step (S7); An A / D conversion step S4 for repeatedly executing the A / D conversion step S4 when the magnification correction is not performed properly in the magnification correction determination step S7; An erase mode determination step (S3) in which an erase mode is determined instead of an enlarged mode in the enlarged mode determination step (S2); An A / D conversion step (S9) in which the video signal input in the erasing mode determination step (S3) is converted into a digital data signal; A data signal storage step (S10) in which the digital data signal converted and output in the A / D conversion step (S9) is stored in the second image memory means; A D / A conversion step (S11) in which the digital data signal stored in the data signal storage step (S10) is converted into an analog data signal; Since the analog data signal converted in the D / A conversion step S11 is not passed through the filtering process and is erased, the filtering determination step S12 determines whether or not the filtering process is properly performed. In the filtering determination step (S12), if the filtering is properly performed, the image erasing step (S13) of erasing some video screens, and if the filtering is not properly performed in the filtering determination step (S12), the A / D conversion step ( A / D conversion step (S9) to repeatedly execute S9).