KR20030048826A - The apparatus and method of color tone chip set and HDTV system using color tone chip set - Google Patents

Abstract

PURPOSE: A chipset for generating color transform coefficient and a method for controlling the same, and an apparatus for improving the quality of a picture of an HDTV system using the same are provided to easily improve color representation characteristics of an HDTV. CONSTITUTION: A TV signal receiving unit(12) receives digital broadcasting image signals transmitted from a broadcasting station. A preprocessing unit(18) adjusts the size of an image to fit for an actual size of a display device, or executes basic image transform. A color transform coefficient generating chipset(20) generates a color transform coefficient for obtaining the optimum quality of the image of a digital TV and an HDTV. A postprocessing unit(22) transforms the image by using the color transform coefficient obtained from the color transform coefficient generating chipset and a color preference data coefficient obtained from a user. An RGB display unit(16) displays the transformed RGB image on a screen.

Description

Color conversion coefficient generation chipset and its control method and apparatus for improving image quality of HDI system using the same {The apparatus and method of color tone chip set and HDTV system using color tone chip set}

The present invention relates to the improvement of color image quality of HDTV. In particular, the development process of the product by installing the color conversion coefficient generation chipset in the digital TV or the HDTV, the developer adjusts the color expression characteristics of the digital TV or HDTV to display the broadcast image of the desired quality Color conversion coefficient generation chipset to improve the color quality of HDTV that can be easily expressed and the general users are not satisfied with the quality of broadcast video. And a control method and a device for improving image quality of an HDTV system using the same.

In general, high definition television (HDTV) refers to high-definition television, which is a new TV technology that provides a quality similar to a 35mm movie and sound quality similar to that of a CD. HDTV technology is an existing technology, and some TV stations have already started transmitting to viewers, although there are a limited number of channels. HDTV transmits digital signals instead of analog.

In the conventional general analog TV, digital TV, and HDTV, the ranges that can be adjusted in relation to the quality of broadcast images are red, green, blue saturation adjustment, brightness adjustment, contrast adjustment, and color adjustment. It is equipped with a chipset to execute the user's remote control to select the desired function to adjust the video quality. In addition to these functions, digital TVs and HDTVs also include chipsets that include special effects such as image resizing, image storage, and filter processing. These conventional TV systems maximize the color representation of TV systems during development. It is not perfect to adjust the color to express more vivid and rich colors, and it is not easy to get the desired quality because users do not know what color to adjust when trying to adjust the color. .

The present invention is to solve the problems described above, by measuring the display characteristics of the TV using the test image stored in the color conversion coefficient generation chipset to correct the display characteristics to achieve the maximum color representation performance and various situations Collect color information that users prefer from test images corresponding to and generate color conversion coefficients for optimal image reproduction, which is preferred by the user using the collected color preference data, and use the generated color conversion coefficients. The final color conversion coefficients are applied by repeating the process of characterizing the TV display, collecting color preference data, and generating color conversion coefficients until the image has a desired quality.

The present invention also provides a color conversion coefficient format designator for determining the format of the color conversion coefficient, an image signal conversion unit for converting the video signal system from YCbCr, a digital broadcast video signal, or YPbPr, an analog broadcast video signal, to RGB, and a color of a display device. The device characterization function to find out the expression characteristics, the color preference data collection unit which collects data about the color of the user's favorite image, and the color conversion coefficient based on the data obtained from the color preference data collection unit. Generation of color conversion coefficients comprising a color conversion coefficient generation unit for generating, a color conversion coefficient performance evaluation unit for converting a color of a test image using the generated color conversion coefficients, and evaluating the result, and an RGB display unit for displaying an image on a screen Chipset and its control method and HDTV using the same It is an object of the present invention to provide a device for improving image quality of a system.

In addition, HDTV developers can easily generate color coefficients to reproduce optimal color quality when the HDTV, which is a digital HDTV broadcasting receiver, and watch HDTV broadcasting using HDTV. The purpose of the present invention is to easily change color coefficients, and to apply the generated color coefficients to the color conversion chipset of the HDTV to reproduce HDTV broadcasts with color that is clearer and richer than the quality of a video viewed on a conventional HDTV.

1 is a configuration diagram in which a chipset circuit for generating HDTV color coefficients according to the present invention is applied to an HDTV system.

2 is a configuration diagram in which a chipset circuit for generating HDTV color coefficients according to the present invention is connected to a conventional HDTV system.

Figure 3 is a detailed block diagram of a chipset circuit for generating HDTV color coefficients of the present invention.

4 is an operational flowchart of a method for improving color quality of an HDTV according to the present invention;

<Description of main parts of drawing>

10, 30: HDTV system, digital TV 12, 32: TV signal receiver

14: HDTV image processing chipset 18, 34: Pre Processing

20, 36: color conversion coefficient generation chipset 22, 38: Post Processing

16, 40: RGB display unit 50: color conversion coefficient format designator

52: test image storage unit 54: video signal conversion unit

56: device characterization function performing unit

58: color preference data collection unit 60: color conversion coefficient generation unit

62: color conversion coefficient performance evaluation unit 64: RGB image display

In order to achieve the above object, the present invention optimally displays an image, including: a test image processing unit for setting a coefficient of a test image and converting the test image, and a TV receiving the test image from the test image processing unit to express a color It includes a test image characteristic detection unit for grasping the color expression characteristics of the system and extracting the correction data, and receiving the correction data from the test image characteristic detection unit and applying the correction data to the test image, and generating a color conversion coefficient to improve the image quality. do.

In addition, the test image processor of the present invention includes a color conversion coefficient format selection unit for selecting color conversion coefficients such as a matrix or a lookup table, a test image storage unit for storing and providing a test image in a digital broadcast format, and the test image. And an image converter for converting the image into an RGB image for display on a system.

In addition, the test image characteristic detection unit of the present invention, characterized in that to extract the correction data by performing the device characterization to find the display characteristics of the digital TV or HDTV from the test image received from the test image processing unit to maintain the optimal state The image quality improvement unit applies the correction data to the test image again to investigate the satisfaction of the image quality of the test image displayed by the user, and generates a final color conversion coefficient to improve the image quality based on the satisfaction.

In addition, the present invention is the step of setting the color conversion coefficient to the test image, converting the test image to the RGB format to display on the screen, by identifying the display characteristics of the digital TV or HDTV from the test image displayed on the screen Extracting the correction data by performing device characterization to maintain the state, reading the test image again, applying the correction data, converting it to the R'G'B 'image format, and displaying it on the screen; and displaying the displayed R'G Investigating satisfaction and color preference of the 'B' image, generating color conversion coefficients from the R'G'B 'image if the user is satisfied, and reading and applying the color conversion coefficients to the test image again. And, if the user is satisfied, transmitting the color conversion coefficients to the post processing unit, and the post processing unit returns the color conversion coefficients. Sikimyeo applied onto, characterized in that to improve the image quality, including the step of displaying the RGB image display portion in the display.

In addition, the present invention is a TV signal receiving unit for receiving a video signal to be transmitted, a pre-processing unit for receiving the video signal from the TV signal receiving unit to adjust the size, color, brightness, etc. of the conversion process and display the image as an optimal image A color conversion coefficient generation chip set for generating color conversion coefficients for the second generation; a post-processing unit for receiving color conversion coefficient information from the color conversion coefficient generation chipset and re-converting the image; and an RGB display unit for displaying the re-converted image on the screen on the screen do.

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

1 is a configuration diagram in which a chipset circuit for generating HDTV color coefficients according to the present invention is applied to an HDTV system.

The HDTV system 10 includes a TV signal receiver 12, an HDTV image processing chipset 14, and an RGB display unit 16. The HDTV image processing chipset 14 includes a preprocessor 18, a color conversion coefficient generation chip set. And a post-processing section 22.

The TV signal receiver 12 receives a digital broadcast video signal transmitted from a broadcasting station, and the preprocessor 18 adjusts the size of the video to match the actual size of the display device with respect to the received video signal, or the overall brightness or contrast. Basic video conversion such as adjustment is performed.

Generation of color conversion coefficients The chipset 20 performs a task for generating color conversion coefficients for obtaining optimal image quality that can be represented by digital TVs and HDTVs. Using the color preference data obtained from the product, if only one operation related to image quality adjustment is performed at the time of shipment of the initial product, the content is stored and the optimal image is reproduced.

The post-processing unit 22 converts an image using coefficients such as matrix or lookup table, which are color conversion coefficients generated by the color conversion coefficient generation chipset 20, and color preference data coefficients obtained from the user. The unit 16 displays the converted RGB image on the screen using the color conversion coefficient.

2 is a block diagram of the HDTV color coefficient generation chipset 36 of the present invention as a separate module connected to a conventional digital TV or HDTV system 30.

When the TV signal receiver 32 receives the digital broadcast signal, the brightness and contrast of the image received by the preprocessor 34 are adjusted, and the digital broadcast signal image YCbCr of the color conversion coefficient generation chipset 36 of the present invention is adjusted. Send as input.

Color Conversion Coefficient Generation The digital broadcast signal image input to the chipset 36 performs color conversion coefficient generation operation based on the coefficients of the matrix or lookup table and the color preference data obtained from the user in order to obtain the optimal image quality. When the obtained color conversion coefficients are returned to the TV system, the post-processing unit 38 of the TV system 30 converts the image using the color conversion coefficients described above, and transmits the image to the RGB display unit 40, and the RGB display unit 40 ) Displays the image converted to the optimal color on the screen of a digital TV or HDTV system.

3 is a detailed block diagram of the chipset 20, 36 for generating HDTV color coefficients according to the present invention.

By selecting the format of the coefficient to be used in the image quality-related chipset of the HDTV system, the color conversion coefficient format designation unit 50 selects the format of the coefficient such as the matrix or the lookup table, and the digital broadcast image is transmitted to the test image storage unit 52. Receive test image saved in (YCbCr) format. The image signal converter 54 applies the set coefficients to the test image and outputs the test image pattern to the RGB image display unit 64 to determine the output characteristics of the display device.

The device characterization function performing unit 56 processes the test image and then corrects the display characteristic of the digital TV or the HDTV from the displayed image and corrects it for the display characteristic. This is to find out how much the device's performance shows in the test environment regulated as a standard, and to calibrate to meet the standard environment as much as possible. By using the pattern of the output test image, device characterization is performed. The calibration data is extracted after execution.

The color preference data collector 58 receives color satisfaction and preferred color data from the user with respect to the test image, and the color conversion coefficient generator 60 is configured to reproduce an optimal color based on the received data. Generate transform coefficients.

The color conversion coefficient performance evaluation unit 62 evaluates the quality of the converted image by converting the test image using the generated color conversion coefficient. If the evaluation result is satisfactory, the color conversion coefficient is generated. If the evaluation result is not satisfactory, it is passed to the device characterization function and repeated until satisfactory performance is obtained.

4 is an operation flowchart of a method for improving color quality of an HDTV according to the present invention.

For the operation and control method of a color coefficient generation chipset for improving color quality of HDTV, the color conversion coefficient format designation unit 50 first selects a format of coefficients such as a matrix or lookup table to be used in a chipset related to image quality of a TV system. The digital broadcast test video stored in the test video storage 52 is read (steps S70 and S72).

The video signal converting section 54 applies the set coefficients to the digital broadcast test video, converts it into an RGB video, and transmits it to the RGB video display section 64 for display (steps S74 and S76).

The device characterization function performing unit 56 finds the display characteristics of the digital TV or the HDTV and maintains them in an optimal state. The device characterization function performing unit 56 performs a correction operation by identifying how much the displayed test image represents the performance of the set standard environment. (Step S78).

Meanwhile, the test image is read again from the test image storage unit 52 in order to apply the data obtained by the device characterization function performing unit 56, and the image signal converting unit 54 converts the test image for digital broadcasting into the RGB image. Are converted (steps S80, S82).

Applying the data obtained by correcting the converted RGB image in consideration of the color expression characteristics of the display device, the device characterization function 56 generates a new R'G'B 'image, and transmits it to the RGB image display unit 64. Display on the screen (steps S84, S86).

If the user approves the output R'G'B 'image, preferred color preference data is collected from the user and the output R'G'B' image (step S88).

Information such as the satisfaction of the displayed test image is received from the user and the collection of the color preference data is finished (step S90).

On the other hand, if the user is not satisfied with the image quality of the displayed image, the process returns to step S80 described above and repeats the above steps with another test image to collect color preference data (step S92).

The color conversion coefficient generation unit 60 generates color conversion coefficients from the test image satisfied by the user, and reads the test image from the test image storage unit 52 in order to evaluate the performance of the raw color conversion number (step S94). , S96).

RGB image display unit 64 converts the read digital broadcasting image (YCbCr) format into RGB format, and converts the image into R'G'B 'format by applying the color conversion coefficients generated in steps S94 and S96. Output to the display device (steps S98, S100, S102).

The color conversion coefficient performance evaluation unit 62 allows the user to evaluate the image quality of the displayed test image, and transmits the color conversion coefficient to the post-processing units 22 and 38 of the HDTV system if it is satisfactory (steps S104 and S106).

On the other hand, if the user is not satisfied with the image quality of the test image, the above process is repeated from step S72 of reading the test image (step S106).

In addition, when the post-processing unit 22 or 38 converts and transmits the input image using the color conversion coefficient determined in the above process, the RGB image display unit 64 displays the image on the screen.

As described above, the present invention is used in the process of adjusting the color representation performance of the TV system in the production process of the digital TV, HDTV and conventional TV system as a chipset and a control method for generating color coefficients to improve the color image quality of HDTV Unlike the conventional method, the color conversion coefficients of the TV system are analyzed to obtain optimal data, and the color conversion coefficients obtained by collecting data on user's preferred colors using test images corresponding to various situations are obtained. When the video is converted to the post-processing part of the chipset related to the image quality of the TV system, and the image is converted using the color data, a richer color and clearer image can be obtained than the image of the quality seen through the conventional TV system. Users can change the color to their favorite color to provide a more comfortable image. .

In addition, when the chipset for generating color conversion coefficients of the present invention is mounted on a digital TV, HDTV, or other display device, home users can easily adjust the color of their preferred quality to differentiate them from conventional TV systems. There is an effect that you can watch the video of the high quality.

Claims (11)

In order to display images optimally, A test image processor configured to set coefficients of a test image and convert the test image; A test image characteristic detection unit which receives the test image from the test image processing unit and grasps the color expression characteristics of the TV system representing the color and extracts correction data; And An image quality improving unit which receives the correction data from the test image characteristic detecting unit and applies the correction data to the test image and generates color conversion coefficients to improve image quality; Color conversion coefficient generation chipset device comprising a. The method of claim 1, The test image processor, A color conversion coefficient format selection unit for selecting color conversion coefficients such as a matrix or a lookup table; A test image storage unit for storing and providing a test image in a digital broadcasting format; And an image converter converting the test image into an RGB image for display on a TV system. Color conversion coefficient generation chipset device comprising a. The method of claim 1, The test image characteristic detection unit, Color correction coefficient generation chipset device, characterized in that to extract the correction data by performing the device characterization to find the display characteristics of the digital TV or HDTV from the test image received from the test image processing unit to maintain the optimal state. The method of claim 1, The image quality improvement unit applies the correction data to the test image again to investigate the satisfaction of the image quality of the test image displayed from the user, and generates a final color conversion coefficient for improving the image quality based on the satisfaction. Color conversion coefficient generation chipset device characterized in that. Setting a color conversion coefficient and applying it to a test image; Converting the test image into an RGB format and displaying the test image on a screen; Extracting correction data by performing device characterization to identify and display display characteristics of the digital TV or the HDTV from the test image displayed on the screen in an optimal state; Reading the test image and converting the image into an R'G'B 'image format by applying the correction data and displaying the same on the screen; Investigating satisfaction and color preference from the user with respect to the displayed R'G'B 'image; Generating color conversion coefficients from the R'G'B 'image if the user is satisfied; Reading and applying the color transform coefficients to the test image again; Transmitting the color conversion coefficient to a post processor if the user is satisfied; And The post-processing unit applies the color conversion coefficient to an image, and the RGB display unit displaying the image on a screen; Color conversion coefficient generation chipset control method, characterized in that to improve the image quality including. The method of claim 5, The setting of the color conversion coefficient and applying to the test image, Setting a coefficient provided by a color conversion coefficient format designation unit by a user; Reading a test image of the test image storage unit; And And applying the coefficients to the test image. The method of claim 5, Converting the test image into an RGB format and displaying the test image on a screen may include: And converting the test image, which is a broadcast image, into an RGB format by the image signal converting unit, and then transmitting the test image to the RGB image display unit and displaying the test image on the screen. The method of claim 5, Reading the test image again and applying the correction data to convert the image into an R'G'B 'image format and then display it on the screen. Reading a test image which is a broadcast image and converting the image into an RGB format by the image signal converter; Applying the correction data to the test image converted into the RGB format and converting the image into R'G'B 'format again; And Transmitting the test image converted into the R'G'B 'format to an RGB display unit and displaying the test image on a screen; Color conversion coefficient generation chipset control method comprising a. The method of claim 5, The step of applying the color conversion coefficient to the test image again, Reading a test image which is a broadcast image and converting the image into an RGB format by the image signal converter; Generating a new R'G'B 'format image by applying the color conversion coefficient to the test image converted to the RGB format by the image signal converter; Color conversion coefficient generation chipset control method comprising a. A TV signal receiving unit for receiving the transmitted video signal; A pre-processing unit receiving the video signal from the TV signal receiving unit and adjusting and converting the size, color, brightness, etc. of the image; A color conversion coefficient generation chip set for generating color conversion coefficients for displaying an image as an optimal image; A post-processing unit receiving color conversion coefficient information from the color conversion coefficient generation chipset and reconverting the image; And An RGB display unit displaying the reconverted image from the post processor on a screen; Apparatus for improving the image quality of an HDTV system using a color conversion coefficient generation chipset comprising a. The method of claim 10, The RGB image display unit, the image quality improvement device of the HDTV system using a color conversion coefficient generation chipset, characterized in that for transmitting to the TV system to display the image of the RGB format directly to the TV system without a separate image processing operation.