KR20040042650A - Vertical division color compensation device of digital TV and method thereof - Google Patents

Abstract

PURPOSE: An apparatus and a method for correcting colors of vertically divided pictures of a digital television are provided to selectively correct the picture quality of a display and correct color characteristic. CONSTITUTION: A radio input unit(100) includes a color conversion component input unit(110) outputting a color conversion component signal and a motion picture control component signal, a color conversion component processor(120) for selecting components included in the color conversion component signal and the motion picture control component signal to output the components as a single color conversion signal, and an encoding unit(130) for encoding the color conversion signal into an optical signal. An image reproducing unit(200) includes a decoder(210) for decoding the color conversion signal encoded by the encoder of the radio input unit, an MPEG2 decoder(220) for decoding a digital TV video signal received through an antenna, a color conversion controller(230) for converting the color of the digital TV video signal according to the color conversion components included in the color conversion signal and outputting the video signal as a corrected video signal, and a video processor(240).

Description

Vertical division color compensation device of digital television and method thereof

The present invention relates to a digital TV, and when a digital TV viewer attempts color conversion that matches his or her taste, the original video screen divided into two stages and the color converted video screen are displayed on a display device to display the color of the original video. The present invention relates to a vertical divisional color correction apparatus of a digital television, which is capable of correction, and a method thereof.

In the conventional digital TV, absolute color conversion (eg, brightness adjustment, contrast adjustment, RGB color adjustment) is performed on the original image screen displayed on the display device to satisfy the viewer's preference for color correction of the original image. Because of this, there is a disadvantage that does not meet the various color conversion needs of the digital TV viewer.

Accordingly, the present invention is to overcome the above-mentioned conventional problems, an object of the present invention is to provide digital TV viewers in two stages using color conversion elements such as ambient environment, color temperature, color gamut, average brightness, etc. according to their preferences. The present invention provides a vertically divided color correcting apparatus and method for digital television, which attempts color conversion through a vertically divided screen and selectively corrects image quality of a display device and corrects color characteristics.

In order to achieve the object of the present invention, a vertical color gamut correcting apparatus of a digital television includes: a color conversion element signal including a user's required environment, color temperature, color gamut size and gamut mapping indicating compression and expansion, and average brightness; A wireless input unit for encoding a video control element signal including a play command, a pause command, a fast forward command, and a reverse command into one color conversion signal and outputting it as an optical signal; And when the color conversion signal of the wireless input unit is input, determines whether the color conversion signal includes a color conversion element together with a video control element. If the color conversion element is not included as a result, the color conversion element is stored in the internal memory. Color-converts the digital TV video signal and transfers the color-converted video signal to the display device according to the video control element to play or pause, fast-forward, or rewind the digital TV video. Is included, the color conversion element stored in the internal memory is updated with the newly input color conversion element, and the digital TV video signal can be reproduced on the original video signal that can be played on the left screen of the display device and on the right screen of the display device. Correction of color conversion by color conversion elements included in the color conversion signal And a video reproducing apparatus which reproduces the video signal by splitting it vertically into two stages.

According to an aspect of the present invention, there is provided a method of vertically segmenting color correction of a digital television using a standard moving image, the image reproducing apparatus including: determining whether a color conversion signal is input from a wireless input unit; Determining, by the image reproducing apparatus, whether a color conversion element is included in the input color conversion signal together with a video control element when a color conversion signal is input; If the color conversion signal does not include a color conversion element, the image reproducing apparatus converts the digital TV image signal by the color conversion element stored in the internal memory, and then transfers the color conversion image signal according to the video control element to the display device. Regenerating; And a color conversion element included in the color conversion signal, the image reproducing apparatus updates the color conversion element stored in the internal memory with a newly input color conversion element, and reproduces the digital TV image signal on the left screen of the display device. Whether or not the color conversion signal is input after being reproduced on the display device by vertically dividing the corrected video signal that can be reproduced in the image signal and the right screen of the display device and color-converted by the color conversion element included in the color conversion signal. Returning to the determining step.

1 is a block diagram showing a vertical division color correction apparatus of a digital television according to the present invention;

2 is a configuration diagram showing a color conversion element processing unit;

3 is a configuration diagram showing a color conversion controller;

4 is a flowchart illustrating a method of vertically divided color correction of a digital television according to the present invention.

<Description of the symbols for the main parts of the drawings>

100: wireless input unit 110: color conversion element input unit

120: color conversion element processing unit 121: ambient environment selection unit

122: color temperature adjusting unit 123: color gamut input unit

124: average brightness extractor 125: video control unit

126: multi-input processor 130: transmission encoding unit

200: video reproducing apparatus 210: light receiving decoding unit

220: MPEG2 decoder 230: color conversion controller

231: multiple input separator 232: ambient conversion unit

233: color temperature conversion unit 234: color gamut conversion unit

235: average brightness converter 236: video controller

237: screen two-stage splitter 240: video processing unit

250: display device 260: left screen controller

270: right screen controller 280: vertical signal resynthesizer

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

1 to 3, the wireless input unit 100 includes a color conversion element signal including a surrounding environment, color temperature, color gamut size and compression and expansion, color gamut mapping, average brightness, a play command, and a date and time required by a user. A video control element signal including a stop command, a fast forward command, and a forward command is encoded into one color conversion signal and output as an optical signal.

The color conversion element input unit 110 of the wireless input unit 100 includes a color conversion element signal including a surrounding environment, color temperature, color gamut size and compression and expansion, color gamut mapping, average brightness, and a play command, and a date and time. Outputs a moving picture control element signal including a stop command, a forward command, and a rewind command.

The color conversion element input unit 110 allows a user (or a viewer) to input a color conversion element through a color input menu, and selection elements such as dark, dim, average, and bright exist as environmental elements. As the color temperature element, there are known elements such as D65, A light source, C light source, D50, 9300K, and the like. In addition, the average brightness factor is a selection factor for adjusting the curve connecting them based on the average brightness of each still image image of the moving image represented by the digital TV video signal.

The color conversion element processing unit 120 of the wireless input unit 100 selects elements included in the color conversion element signal and the video control element signal, respectively, and outputs them as one color conversion signal.

The surrounding environment selector 121 of the color conversion element processor 120 selects and outputs the surrounding environment required by the user.

The color temperature adjusting unit 122 of the color conversion element processing unit 120 selects and outputs a color temperature required by the user.

The color gamut input unit 123 of the color conversion element processor 120 selects and outputs a gamut mapping indicating a gamut size and compression or expansion required by the user.

The average brightness extractor 124 of the color conversion element processing unit 120 outputs the average brightness of the digital TV still image requested by the user.

The video control unit 125 of the color conversion element processor 120 outputs a video control element signal including a play command, a pause command, a forward command, and a forward command for a digital TV image.

The multi-input processor 125 of the color conversion element processor 120 includes the ambient environment selector 121, the color temperature controller 122, the color gamut inputter 123, the average brightness extractor 124, and the video controller. The signals output from the 125 are added together and output as one color conversion signal.

The transmission encoding unit 130 of the wireless input unit 100 encodes the color conversion signal and outputs it as an optical signal.

When the color conversion signal of the wireless input unit 100 is input, the image reproducing apparatus 200 determines whether the color conversion signal includes a color conversion element together with a video control element. After color conversion of the digital TV video signal by the color conversion element stored in the internal memory, the color conversion video signal is transmitted to the display device 250 according to the video control element to play or pause the digital TV video being played. Forward, backward.

When the color conversion signal of the wireless input unit 100 is input, the image reproducing apparatus 200 newly converts the color conversion element stored in the internal memory when the color conversion signal is included in the color conversion signal together with the video control element. The digital TV video signal is updated with a conversion element, and the digital video signal is reproduced on the left screen of the display device 250 and the color conversion element included in the color conversion signal is reproduced on the right screen of the display device 250. Two-stage vertical division into a color-converted corrected video signal is performed.

The light receiving decoder 210 of the image reproducing apparatus 200 receives and decodes a color conversion signal encoded by the light transmitting encoder 130 of the wireless input unit 100.

The MPEG2 decoder 220 of the image reproducing apparatus 200 decodes the digital TV image signal received through the antenna by MPEG2.

When the color conversion signal and the digital TV video signal decoded by MPEG2 are input, the color conversion controller 230 of the video reproducing apparatus 200 outputs the digital TV video signal as an original video signal. The color is converted by the color conversion element included in the color conversion signal and then output as a corrected video signal.

The multi-input separator 231 of the color conversion controller 230 may include a color conversion signal decoded by the light receiving decoding unit 210 and a digital TV image signal decoded by the MPEG2 decoding unit 220. When input via 240, the color conversion signal and the digital TV video signal are separated, and the color conversion element and the video control element included in the color conversion signal are separated.

The ambient environment conversion unit 232 of the color conversion controller 230 may determine the color characteristics of the digital TV video signal according to the ambient environment element input by being separated by the multiple input separator 231. The conversion is done using CIECAM97s, a color appearance model.

The color temperature conversion unit 233 of the color conversion controller 230 may determine the color characteristics of the digital TV video signal according to the color temperature component input by being separated by the multiple input separator 231. The conversion is done using the correlation model CIECAM97s.

The color gamut converter 234 of the color conversion controller 230 compresses or expands the color gamut of the digital TV video signal according to the color gamut mapping element input by being separated by the multiple input separator 231 to obtain color characteristics. Convert.

The gamut converter 234 is a device that corrects the gamut because the gamut representation ability of the image reproduced by the display apparatus 250 is different from the camera gamut when the image signal is input. After compression, the size of the color gamut is compressed or expanded by clipping an outer region that cannot be saturated.

The average brightness converter 235 of the color conversion controller 230 converts the color characteristics of the digital TV video signal according to the average brightness component separated and input by the multiple input separator 231.

The video controller 236 of the color conversion controller 230 outputs the digital TV video signal playback signal according to a playback command among video control elements separated and input by the multiple input separator 231.

The two-stage vertical splitter 237 of the color conversion controller 230 converts the digital TV image signal, which is separated and input by the multiple input separator 231, into the original image signal when the playback signal of the video controller 236 is input. The digital TV video signal color-converted by each color conversion element included in the color conversion signal separated by the multiple input separator 231 is output as a corrected video signal.

When the color conversion signal of the light receiving decoding unit 210 is input, the video processing unit 240 of the image reproducing apparatus 200 determines whether a color conversion element is included in the color conversion signal together with a video control element. If the result color conversion element is not included, the color conversion element stored in the internal memory converts the digital TV video signal decoded by the MPEG2 decoder 220, and then converts the color signal according to the playback command of the video control element. Is transmitted to the display apparatus 250 to perform a pause, fast forward, and backward rewind according to a pause command, a fast forward command, and a reverse command of a moving picture control element with respect to the digital TV image being played or reproduced.

The video processing unit 240 updates the color conversion element stored in the internal memory with the newly input color conversion element when the color conversion signal of the light receiving decoding unit 210 includes the color conversion element together with the video control element. The color conversion signal of the light receiving decoding unit 210 and the digital TV video signal decoded by the MPEG2 decoder 220 are transferred to the color conversion controller 230.

The left screen controller 260 of the image reproducing apparatus 200 converts the original image signal of the color conversion controller 230 into a signal reproducible on the left screen of the display apparatus 250.

The right screen controller 270 of the image reproducing apparatus 200 converts the corrected image signal of the color conversion controller 230 into a signal reproducible on the right screen of the display apparatus 250.

The vertical signal resynthesizer 280 of the image reproducing apparatus 200 synthesizes the original image signal converted by the left screen controller 260 and the corrected image signal converted by the controller 270 on the right side of the display device. The image is transmitted to 250 and reproduced as a left original image and a right corrected image divided vertically into two stages.

The vertical divisional color correction apparatus of the digital television according to the present invention configured as described above operates as follows by the method shown in FIG.

First, the image reproducing apparatus 200 determines whether a color conversion signal is input from the wireless input unit 100 (S10).

If the color conversion signal is input from the wireless input unit 100, the image reproducing apparatus 200 determines whether the color conversion element is included in the input color conversion signal together with the video control element (S20).

In this case, the color conversion signal is output as an optical signal encoded by the transmission encoding unit 130 of the wireless input unit 100 is input to the light receiving decoding unit 210 of the image reproducing apparatus 200, the light receiving decoding unit 210 The color conversion signal inputted as is decoded by the light receiving decoding unit 210 and then input to the video processing unit 240. Accordingly, the video processing unit 240 performs the color conversion signal together with the video control element on the color conversion signal. Determine if a transform element is included.

As a result of the video processing unit 240 of the image reproducing apparatus 200 determining whether the color conversion element is included in the input color conversion signal together with the video adjustment element, the color conversion signal includes only the video adjustment element and the color conversion element. If not included, the video processing unit 240 of the image reproducing apparatus 200 performs color conversion on the digital TV image signal decoded by the MPEG2 decoder 220 by the color conversion element stored in the internal memory, and then inputs the color. The image signal, which has been color-converted according to the video adjusting element included in the converted signal, is transmitted to the display apparatus 250 for reproduction.

In this case, the user (or viewer) does not attempt to convert the color of the digital TV image, and the video processing unit 240 causes the digital TV image to be reproduced by a play command among the video control elements included in the color conversion signal. The video processing unit 240 transmits a signal to the display apparatus 250 for playback, or by a pause command, a forward command, or a forward command of a video control element of a color conversion signal that does not include a color conversion element. Pause, fast forward, and fast reverse the digital TV video being played.

On the other hand, when the video processing unit 240 of the image reproducing apparatus 200 determines whether the color conversion element is included in the input color conversion signal together with the video control element, the color conversion signal is included in the color together with the video control element. If the conversion element is included, the video processing unit 240 of the image reproducing apparatus 200 updates the color conversion element stored in the internal memory with the newly input color conversion element (S40), and by the MPEG2 decoder 220 The corrected image color-converted by the color conversion element included in the color conversion signal included in the original video signal that can be decoded on the left screen of the display apparatus 250 and the right screen of the display apparatus 250 and included in the color conversion signal. In step S50, the display apparatus 250 divides the signal into two vertical stages and reproduces the color conversion signal.

This case corresponds to a case where a user (or viewer) attempts color conversion on a digital TV image that is being played back. In this case, the video processing unit 240 performs the color conversion signal of the light receiving decoding unit 210 and the MPEG2 decoder. The digital TV image signal decoded by 220 is transferred to the color conversion controller 230.

Accordingly, the two-stage vertical splitter 237 of the color conversion controller 230 receives the digital TV video signal separated and input by the multi-input separator 231 when the playback signal of the video controller 236 is input. The ambient image converter 232 outputs the original image signal to the left screen controller 260 and transmits the image signal to the left screen controller 260 by the color conversion elements included in the color conversion signal separated by the multiple input separator 231. And the color temperature converter 233, the gamut converter 234, and the average brightness converter 235 respectively output the digital TV video signal, which has been color-converted, as a corrected video signal, and transmit the corrected video signal to the right screen controller 270.

Subsequently, the left screen controller 260 and the right screen controller 270 convert the original video signal and the corrected video signal into reproducible signals on the left and right screens of the display apparatus 250, respectively. 280, and the vertical signal resynthesizer 280 synthesizes the original image signal converted by the left screen controller 260 and the corrected image signal converted by the controller 270 on the right side of the display device 250. ) To play the left original image and the right corrected image divided vertically into two stages.

After the left original image and the right corrected image, which are vertically divided in two stages, are reproduced on the display apparatus 250 as described above, the video processing unit 240 of the image reproducing apparatus 200 receives color from the wireless input unit 100. Returning to step S10 of determining whether or not a converted signal is input (S50).

As described above, the vertical division color correction apparatus and method of the digital television according to the present invention are vertically divided into two stages by the digital TV viewer using color conversion elements such as ambient environment, color temperature, color gamut, and average brightness according to his / her preference. By splitting the screen, color conversion can be attempted to selectively modify the image quality of the display device and to correct the color characteristics. This not only provides digital TV viewers with improved image quality, but also provides various color characteristics. Through the input color input menu, the original image and the corrected image can be variously compared in real time, and the image quality of the digital TV can be reproduced as desired by the viewer.

What has been described above is only one embodiment for carrying out the vertical divisional color correction apparatus and method of the digital television according to the present invention, and the present invention is not limited to the above-described embodiment, but in the following claims Without departing from the gist of the present invention, any person of ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

Claims (7)

Adjust the video including the ambient environment, color temperature, gamut mapping indicating gamut size and compression and expansion, color conversion element signal including average brightness, play command, pause command, fast forward command, and rewind command. A wireless input unit for encoding an element signal into one color conversion signal and outputting it as an optical signal; And When the color conversion signal of the wireless input unit is input, it is determined whether the color conversion signal is included in the color conversion signal together with the video control element, and as a result, if the color conversion element is not included, the digital conversion element is stored by the color conversion element stored in the internal memory. After converting color TV video signal, it transmits the color converted video signal to the display device according to the video control element and plays or pauses, fast forwards and backwards the digital TV video being played. If included, the color conversion element stored in the internal memory is updated with the newly input color conversion element, and the digital TV video signal can be reproduced on the left screen of the display device and on the right screen of the display device. Corrected zeros converted by the color conversion elements included in the conversion signal A signal two-stage image reproduction device for reproducing the vertical partition Vertical division color correction device for a digital television, characterized in that consisting of. The method of claim 1, wherein the wireless input unit Adjust the video including the ambient environment, color temperature, gamut mapping indicating gamut size and compression and expansion, color conversion element signal including average brightness, play command, pause command, fast forward command, and rewind command. A color conversion element input unit for outputting an element signal; A color conversion element processor which selects elements included in each of the color conversion element signal and the video adjustment element signal and outputs them as one color conversion signal; And A light transmitting encoder which encodes the color conversion signal and outputs it as an optical signal Vertical division color correction device for a digital television, characterized in that consisting of. The method of claim 2, wherein the color conversion element processing unit An environment selection unit for selecting and outputting an environment required by the user; A color temperature controller which selects and outputs a color temperature required by a user; A gamut input unit configured to select and output a gamut mapping indicating a gamut size and compression or expansion required by a user; An average brightness extractor for outputting an average brightness of a digital TV still image requested by a user; A moving picture adjusting unit for outputting a moving picture adjusting element signal including a play command, a pause command, a forward command, and a forward command for a digital TV image; And A multi-input processor which combines the signals output from the ambient environment selection unit, the color temperature control unit, the color gamut input unit, the average brightness extractor, and the video control unit and outputs them as one color conversion signal. Vertical division color correction device for a digital television, characterized in that consisting of. The apparatus of claim 1, wherein the image reproducing apparatus A light receiving decoding unit which receives and decodes the color conversion signal encoded by the wireless input unit; An MPEG2 decoder for decoding the digital TV video signal received through the antenna by MPEG2; When the color conversion signal and the digital TV video signal decoded by MPEG2 are inputted, the digital TV video signal is output as an original video signal, and the digital TV video signal is converted by color conversion elements included in the color conversion signal. A color conversion controller for outputting a post-correction video signal; When the color conversion signal of the light receiving decoding unit is input, the color conversion signal determines whether the color conversion element is included together with the video control element. As a result, if the color conversion element is not included, the color conversion element is stored in the internal memory. Color-converts the digital TV video signal decoded by the MPEG2 decoder and transmits the color-converted video signal to the display device according to the playback command of the video control element, or pauses the video control element with respect to the digital TV video being played. Stop, fast forward, and fast forward according to the command, the fast forward command, and the fast reverse command. If a color conversion element is included, the color conversion element stored in the internal memory is updated with the newly input color conversion element and the light reception is performed. The color conversion signal of the decoding unit and the decoded by the MPEG2 decoder. A video processing unit for delivering hair TV image signal by the color conversion controller; A left screen controller for converting the original video signal of the color conversion controller into a playable signal on the left screen of the display device; A right screen controller for converting the corrected video signal of the color conversion controller into a playable signal on the right screen of the display device; And When the right video signal converted by the left screen controller and the corrected video signal converted by the controller are synthesized on the right side, the vertical signal is reproduced as a left original video and a right corrected video divided vertically into two stages by passing them to a display device. Synthesizer Vertical division color correction device for a digital television, characterized in that consisting of. The method of claim 4, wherein the video processing unit Whenever a color conversion signal including a color conversion element is input from the light receiving decoding unit, a color conversion element stored in the internal memory is newly updated, and when the color conversion signal not including the color conversion element is input, the final update is performed. Color converting the digital TV video signal decoded by the MPEG2 decoder by using the color conversion element, and then transmitting the color converted video signal to a display device for reproduction according to a reproduction command of a video adjusting element. Vertical division color correction device. The method of claim 4, wherein the color conversion controller When the color conversion signal decoded by the light receiving decoding unit and the digital TV image signal decoded by the MPEG2 decoding unit are input through the video processing unit, the color conversion signal and the digital TV image signal are separated and the color included in the color conversion signal. A multiple input separator for separating the conversion element and the video control element, respectively; An environment conversion unit for converting color characteristics of the digital TV video signal according to an environment element separated and input by the multiple input separator; A color temperature converting unit converting color characteristics of the digital TV video signal according to color temperature components input by being separated by the multiple input separator; A color gamut converter configured to convert color characteristics by compressing or extending the size of the gamut of the digital TV video signal according to a gamut mapping element input by being separated by the multiple input separator; An average brightness converter for converting color characteristics of the digital TV video signal according to the average brightness component separated and input by the multiple input separator; A video controller for outputting the digital TV video signal playback signal according to a playback command among video adjustment elements separated and input by the multiple input separator; And When the playback signal of the video controller is input, a digital TV video signal separated and input by a multiple input separator is output as an original video signal, and each color conversion element included in the color conversion signal separated by the multiple input separator is input. Two-stage vertical splitter that outputs digital TV video signal converted by color as a corrected video signal The vertical divisional color correction device for a digital television, characterized in that consisting of. Determining whether a color conversion signal is input from the wireless input unit by the image reproducing apparatus; Determining, by the image reproducing apparatus, whether a color conversion element is included in the input color conversion signal together with a video control element when a color conversion signal is input; If the color conversion signal does not include a color conversion element, the image reproducing apparatus converts the digital TV image signal by the color conversion element stored in the internal memory, and then transfers the color conversion image signal according to the video control element to the display device. Regenerating; And If the color conversion signal includes a color conversion element, the image reproducing apparatus updates the color conversion element stored in the internal memory with a newly input color conversion element and reproduces the digital TV image signal on the left screen of the display device. After reproducing to the display device by vertically dividing the corrected video signal which can be reproduced in the signal and the right screen of the display device and color-converted by the color conversion element included in the color conversion signal, it is determined whether the color conversion signal is not input. Returning to the next step A vertical divisional color correction method of a digital television, characterized in that consisting of.