KR20040036116A - Controlling method and apparatus for transmitting moving picture color by using color space - Google Patents

Abstract

PURPOSE: A device for converting a moving image color using a color space is provided to obtain an optimal color image in real time while generating and displaying moving images by being mounted on a digital pickup system and a display system, thereby outputting the optimal image to a viewer. CONSTITUTION: A digital pickup system(100) converts an inputted moving image(S1) into RGB image signal through an inner CCD(Charged Coupled Device) element, and supplies the converted RGB image signal to a color conversion block(110). The color conversion block(110) converts the RGB image signal into independent color spaces, and supplies the color spaces to a display system(200) through a wired/wireless image transmission line(S2). The display system(200) supplies moving image signals supplied via the transmission line(S2) to a display color conversion block(210). The display color conversion block(210) converts the moving image signals into original signals, and supplies moving images(S3) to viewers.

Description

CONTROLLING METHOD AND APPARATUS FOR TRANSMITTING MOVING PICTURE COLOR BY USING COLOR SPACE}

The present invention relates to a video color converting apparatus and a control method using a color space. In particular, a video color converting device, which is a chipset type, is mounted on a digital imaging system and a display system to obtain an optimal color image during a video generating and display process. An apparatus and method for causing an output are provided.

In general, when an image is output to a viewer through a monitor or a printer by using an imaging system, when the above-described image is a still image, the color of the resultant image is different because the color reproduction characteristics expressed by the camera, the monitor, and the printer are different. As the quality does not meet the needs of the user, the situation is to improve the color quality of the image using a separate software to solve this problem. However, such a color quality improvement method takes a long time to convert a single image, and it is inconvenient to set the environment every time the image is converted.

Next, when the above-described video is a moving picture, similar to a still picture, when a moving picture obtained from a broadcasting camera is broadcasted on a viewer's TV, image conversion considering the color representation performance of the current camera and the color representation performance of the TV is not applied. The viewer cannot be sure that the broadcast video he is watching matches the color quality of the video obtained from the actual camera.

That is, in extreme cases, the viewer may watch a color that is completely different from the color of the recorded image. To solve this problem, the color quality of the camera and the TV must be matched using a separate software as in the case of a still image. However, in the case of a video that requires image conversion in real time, there is a problem in applying the same method as the still image conversion method, and the software conversion takes a lot of computational time, and thus it is practically impossible to apply to a video.

As such, a technology for outputting various images to a viewer through a monitor or a printer by using an imaging system includes "image quality compensation device and method for digital TV" filed November 10, 1999-0049-91, 1999, and "TV Quality Improvement Device by Gamma Correction", registered 10-0206792 in April, and "High Definition TV Codec System" published in the February 1996 HCI 96 Conference.

As described above, the disclosed prior art will be described in detail, and the apparatus and method for compensating the image quality of a digital TV may be provided with a component for processing an analog signal in converting an analog signal obtained through an illumination light sensor into an analog signal, which is an analog signal. It is very difficult to determine the exact lighting condition due to the error of the ALB signal caused by the error of the power supply.In addition, in most cases, the lighting condition of the space where the TV is actually watched is complex lighting, but the illumination light value detected by the illumination light sensor This is to solve the problem of not being able to meet all the real lighting conditions by compensating the image quality by comparing the preset values with the preset values. By applying Bartson's theory of transforming eye compliance By compensating image quality of the screen, it minimizes the occurrence of errors and satisfies the complex lighting conditions to provide a natural screen to the viewer.

In addition, the TV quality improvement apparatus using gamma correction performs gamma correction on the transmitting side, and when the image is sent to the receiving side, the signal is reproduced in the TV image because the linear conversion is performed after YIQ for linearly converted signals. In order to solve the problem that various image quality deterioration occurs, the EDTV system reduces the image quality deterioration by implementing a pre-compensation circuit on the transmission side, but in this case, the broadcasting system transmitting the TV signal As there is a disadvantage that an additional compensation circuit must be implemented and the broadcasting system itself needs to be supplemented, a gamma correction circuit is implemented on the receiving side so that the image quality deteriorates due to gamma correction and the limitation of the color signal on the transmitting side without modifying the current broadcasting system. It is a technology that can reduce phenomena and detail degradation.

In addition, high definition TV codec systems include codec and channel transmission system technology for delivering high definition TV signals from broadcast stations to home receivers. Codec system consists of video and audio signal encoder, multiplexer and receiver.

The high-definition TV video encoder uses a split-screen encoding module that processes a total of eight screens in parallel by dividing the screen into four equal parts in the horizontal direction and two in the vertical direction to process a large amount of information at high speed. The input image is an YPbPr signal and is converted into YCbCr parallel data in 4: 2: 2 format. The YCbCr parallel data is converted into 4-byte parallel data and sent to the split screen encoding module together with the control signal required for encoding. The split screen encoding module is capable of processing video in the ITU-R BT.601 format. -2 MP @ L class video encoder hardware, combined with 8 parallel to form a high definition TV encoder. The split screen encoding module includes a preprocessor, a frame memory unit, a motion estimation and compensation unit, a playback frame memory unit, a transform and quantization unit, an inverse quantization and inverse transform unit, a variable length encoding and buffer unit, and a rate control unit. Each functional block follows the data format, structure and requirements described in MPEG-2, and includes additional functions for performance improvement and high definition TV split screen processing. Each split-screen encoding module is a technology that can be used as a high-definition TV encoder, as well as a function that can be used independently as a DTV encoder.

As described above, when looking at the technology disclosed in the prior patent, it is possible to match the color quality of the camera and the TV using a separate software, which is a problem in the present invention, but in the case of a video that requires image conversion in real time, still image conversion method It is impossible to apply the same method as in the above, and it also takes a lot of calculation time in the software conversion, so there is still a problem in the prior patent disclosed that the application to the video is virtually impossible.

Accordingly, the present invention has been made to solve the above-mentioned problems, the object of the present invention is to equip the digital imaging system and display system with a video color conversion device in the form of a chipset to obtain the optimal color image in the video generation and display process in real time An object of the present invention is to provide a video color converting apparatus and a control method using a color space for outputting to a viewer.

In the present invention for achieving the above object, a video color conversion apparatus using a color space converts a video inputted through a lens into R, G, and B video signals through a CCD (charge coupled device) element, and converts the converted R An input color conversion block converting the G and B video signals into a device independent color space and providing the same through a wired / wireless video transmission line; And a display color conversion block for converting the video signal converted from the input color conversion block into the device independent color space to the display device color space to provide a video for viewing by the viewer.

In addition, the video color conversion control method using a color space in the present invention for achieving the above object comprises the steps of inputting a video through the lens; First determining whether the video format is R, G, B or YCbCr with respect to the input video by using the video signal selector in the input color conversion block; When the output image format is R, G, or B in the first determination step, reading the normalized color expression characteristics and video conversion coefficients stored in the camera data storage in the device independent color space conversion unit in the input color conversion block; Reads standardized color expression characteristics and video conversion coefficients, and uses device-independent color spaces R ', which use predefined standard values for the light source, gamma, and white luminance values, and a 3x3 matrix or look up table. Converting the video signal into a G ', B' format and providing it to a video signal format searcher in the display color conversion block; Determining whether the format of the video signal converted into the device independent color space by the video signal format search unit is R ', G', B ', or YCbCr; In the second determination step, when the format of the video signal, which is a device independent color space, is R ', G', or B ', the color space conversion unit in the display color conversion block may be displayed in the form of an OSD (on screen display) or a switch on a TV or monitor. Controlling an ambient light adaptation menu selection unit to select an ambient light adaptation menu for realizing an optimal picture quality according to an implemented viewing environment; An ambient light adaptation menu selection unit operated by the color space converting unit selects an ambient light adaptation data stored in the ambient light adaptation data storage unit according to a menu to implement an optimum picture quality according to a viewing environment; 3x3 matrix or lookup obtained from color space conversion and color conversion characteristics of standardized digital TV or monitor stored in data storage and video conversion coefficient and inverse transformation of 3x3 matrix or lookup table used in input device color conversion chipset Reading a table; Searching for a display device color format used by a TV or a monitor while referring to a matrix or a lookup table read from the color space conversion unit, and determining whether the format is an R, G, B format, or a YCbCr format; If the R, G, B format is used in the third judging step, displaying a moving picture that has undergone color conversion from the received device independent color space to R, G, B, which is a device color space used by a TV or a monitor. Characterized in that.

1 is a block diagram of a video color converting apparatus using a color space according to the present invention;

FIG. 2 is a detailed configuration diagram of the input color conversion block shown in FIG. 1.

FIG. 3 is a detailed configuration diagram of the display color conversion block shown in FIG. 1.

4 is a flowchart illustrating an operation of a video color conversion control method using a color space according to the present invention in detail.

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

100: digital imaging system 110: input color conversion block

111: video signal selection unit 113: device independent color space conversion unit

115: camera data storage unit 117: camera color space conversion unit

200: display system 210: display color conversion block

211: video signal format search unit 213: color space conversion unit

215: Data storage unit 217: Ambient light adaptation menu selection unit

219: ambient light adaptation data storage unit

S1: Video input S2: Wired / wireless video transmission line

S3: Video

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

1 is a block diagram of a video color converting apparatus using a color space according to the present invention, and includes a digital imaging system 100 and a display system 200.

The digital imaging system 100 converts R, G, and B image signals to a moving image S1 input through a lens (not shown) through an internal charge coupled device (CCD) device, and converts the converted R and G images. , B image signal is provided to the input color conversion block 110.

The input color conversion block 110 converts the R, G, and B signals provided from the digital imaging system 100 into a device independent color space and provides them to the display system 200 through the wired / wireless image transmission line S2. As shown in FIG. 2, the video signal selection unit 111, the device independent color space conversion unit 113, the camera data storage unit 115, and the camera color space conversion unit 117 are provided.

The image signal selector 111 outputs R, G, B image signals generated from the digital imaging system 100 through a menu mounted in the form of an OSD (On Screen Display) or a switch. After selecting whether to set to B or YCbCr, the selection result is provided to the device-independent color space conversion unit 113.

The device-independent color space converter 113 is a standardized color stored in the camera data storage 115 when the output image format is R, G, or B according to the selection result provided from the image signal selector 111. Read the expression characteristics and video conversion coefficients, and use the standard values predefined for the light source, gamma, white luminance values, etc., and the device-independent color spaces R ', G', using a 3x3 matrix or look up table. The video signal is converted into a B 'format video signal and provided to the display system 200 through the camera color space conversion unit 117 and through the wired / wireless video transmission line S2. Here, the camera data storage unit 115 stores standardized color expression characteristics and video conversion coefficients.

In addition, the device-independent color space conversion unit 113 performs a conversion process to the YCbCr format when the output image format is YCbCr according to the selection result provided from the image signal selection unit 111. ) Provides a video signal.

The camera color space converting unit 117 converts the video signal provided from the device independent color space converting unit 113 into a video signal of YCbCr format in the device independent color space and passes the wired / wireless video transmission line S2 to display the system. To 200.

The display system 200 provides the display color conversion block 210 with a video signal provided from the digital imaging system 100 via the wired / wireless image transmission line S2.

The display color conversion block 210 is a block for converting a video signal converted into a device-independent color space provided from the digital imaging system 100 into an original video signal to provide a video S3 for viewing by a viewer. As shown in Fig. 3, the video signal format retrieval unit 211, the color space conversion unit 213, the data storage unit 215, the ambient light adaptation menu selection unit 217, and the ambient light adaptive data storage Has a portion 219.

The video signal format search unit 211 searches whether the video signal format converted into the device independent color space provided from the input color conversion block 110 is R ', G', B 'or YCbCr. The search result is provided to the color space converter 213.

The color space conversion unit 213 may display an OSD (TV) on the TV or monitor when the video signal format, which is a device independent color space, is R ', G', or B 'according to a search result provided from the video signal format search unit 211. control the ambient light adaptation menu selection unit 217 to select the ambient light adaptation menu for the best image quality according to the viewing environment implemented in the form of on screen display) or a switch, and stored in the data storage unit 215 Read the 3x3 matrix or lookup table obtained by inverting the 3x3 matrix or lookup table used in the color rendering characteristics and video conversion coefficients and input device color conversion chipsets of a standardized digital TV or monitor. For example, if the display device color format used by the TV or monitor is searched and the R, G, and B formats are used, the received device independent color space is used as the device color space used by the TV or the monitor as R, G, B. Color conversion, and using the YCbCr format, color conversion from the device independent color space R ', G', B 'color space to the YCbCr color space is performed, and then the final converted video S3 is Display on a TV or monitor.

Also, the color space converter 213 may display an on-screen display (OSD) on a TV or monitor when the video signal format, which is a device-independent color space, is YCbCr according to a search result provided from the video signal format search unit 211. The ambient light adaptation menu selection unit 217 is controlled to select an ambient light adaptation menu for implementing an optimum picture quality according to the viewing environment implemented in the form of a switch, and the search result provided from the video signal format search unit 211 is provided. If the video signal format of the device independent color space is YCbCr, the display color format used by the TV or monitor after performing color conversion from the YCbCr color space to the device independent color space R ', G', B ' If you use the YCbCr format, you can perform color conversion from device independent color space to YCbCr, the device color space used by your TV or monitor. After performing color conversion from the device independent color space to the device color spaces R, G, and B, the final converted video S3 is displayed on a TV or a monitor.

The ambient light adaptation menu selection unit 217 is operated under the control of the color space conversion unit 213 to select the ambient light adaptation data stored in the ambient light adaptation data storage unit 219 according to a menu, and thus to optimize the viewing environment. Implement image quality. Here, the ambient light adaptation data storage unit 219 stores the ambient light adaptation data for realizing the best image quality according to the viewing environment.

With reference to the flowchart of FIG. 4, the operation of the video color conversion control method using the color space according to the present invention will be described in more detail based on the above-described configuration.

First, when a moving picture S1 input through the lens of the digital imaging system 100 is provided (step 401), the device independent color space conversion unit 113 is a standardized table stored in the camera data storage unit 115. Color expression characteristics and video conversion coefficients produced as 1, i.e.

Data name Data type The total size of the data INTEGER Model type INTEGER 1: Digital video camera 2: Broadcast camera 3: Digital TV 4: Monitor model name ASCⅡ TEXT Date of manufacture year INTEGER month INTEGER Work INTEGER city INTEGER minute INTEGER second INTEGER White luminance value X DOUBLE Y DOUBLE Z DOUBLE Red gamma DOUBLE Green gamma DOUBLE Blue gamma DOUBLE Ambient light type INTEGER1: D652: D503: A4: C5: F26: F87F11 Brightness of the light source INTEGER 1: Bright 2: Normal 3: Dark Video conversion factor DOUBLE Explanation ASCⅡ TEXT

As described above, R ', G is a device-independent color space using reading standardized data and using a predetermined standard value for a light source, gamma, white luminance value, etc., and a 3x3 matrix or a look up table. The video signal is converted into a video signal of 'B' format (step 402).

Thereafter, the image signal selector 111 in the input color conversion block 110 sets the image format to be outputted as R, G, or B through a menu mounted in the form of an OSD (On Screen Display) or a switch. After determining whether or not to set YCbCr, the selection result is provided to the device-independent color space conversion unit 113 (step 403).

When the output image format is R, G, or B in the determination step 403, the video in the display color conversion block 210 through the camera color space conversion unit 117 and via the wired / wireless image transmission line S2. The signal format search unit 211 is provided (step 403).

On the other hand, if the output image format is YCbCr in the determination step 402, the device independent color space converter 113 provides a video signal to the camera color space converter 117 to perform a conversion process to the YCbCr format. (Step 404).

The camera color space conversion unit 117 converts the video signal provided from the device independent color space conversion unit 113 into a video signal of YCbCr format in the device independent color space, and then displays the display color via the wired / wireless video transmission line S2. The video signal format search unit 211 in the conversion block 210 is provided (step 405).

The video signal format search unit 211 in the display color conversion block 210 converts the video signal format converted into the device independent color space provided through the wired / wireless video transmission line S2 to R ', G', B '. After determining whether or not it is YCbCr, the search result is provided to the color space conversion unit 213 (step 406).

In the determination step 406, if the format of the video signal, which is a device independent color space, is R ', G', B ', the color space conversion unit 213 may display an OSD (on screen display) or a switch on a TV or monitor. The ambient light adaptation menu selection unit 217 is controlled to select an ambient light adaptation menu for implementing an optimal image quality according to the viewing environment implemented in the form (step 407).

The ambient light adaptation menu selection unit 217 is operated under the control of the color space conversion unit 213 to select the ambient light adaptation data stored in the ambient light adaptation data storage unit 219 according to a menu, and thus to optimize the viewing environment. Implement the image quality (step 408).

Thereafter, the color space converter 213 is a color representation characteristic and video conversion coefficient of the standardized digital TV or monitor stored in the data storage unit 215 and a 3x3 matrix or lookup table used in the input device color conversion chipset. 3x3 matrix or lookup table obtained by the inverse transformation of up table) is read (step 409).

Next, the color space conversion unit 213 searches the display device color format used by the TV or the monitor while referring to the read matrix or lookup table and checks whether it is in R, G, B format, or YCbCr format ( Step 410).

If the R, G, B format is used in the check step 410, the moving picture S3 which has converted the color from the received device independent color space to the R, G, B device color space used by the TV or the monitor is displayed. Display on a TV or monitor (step 411). On the other hand, if the YCbCr format is used in the checking step 410, the TV or monitor displays the video S3 that has performed color conversion from the device independent color spaces R ', G', B 'color space to the YCbCr color space. Display (step 412).

In the determination step 406, when the format of the video signal, which is a device independent color space, is YCbCr, the color space conversion unit 213 may be used for a viewing environment implemented in the form of an OSD (on screen display) or a switch on a TV or a monitor. Accordingly, the ambient light adaptation menu selection unit 217 is controlled to select the ambient light adaptation menu for realizing the best image quality (step 407-1).

The ambient light adaptation menu selection unit 217 is operated under the control of the color space conversion unit 213 to select the ambient light adaptation data stored in the ambient light adaptation data storage unit 219 according to a menu, and thus to optimize the viewing environment. Implement the image quality (step 408-1).

Thereafter, the color space converter 213 is a color representation characteristic and video conversion coefficient of the standardized digital TV or monitor stored in the data storage unit 215 and a 3x3 matrix or lookup table used in the input device color conversion chipset. 3x3 matrix or lookup table obtained by the inverse transformation of up table) is read (step 409-1).

The color space conversion unit 213 performs color conversion from the YCbCr color space to R ', G', and B ', which are device independent color spaces, and then determines the display color format used by the TV or the monitor (step 413).

When the YCbCr format is used in the determination step 413, the moving picture S3, which has been subjected to color conversion from the device independent color space to the YCbCr device color space used by the TV or the monitor, is displayed on the TV or monitor (step 414). . On the other hand, when using the R, G, and B formats in the determination step 413, color conversion from the device independent color space to R, G, and B, which is the device color space, is performed, and then the final converted video S3 is performed. Display on a TV or monitor (step 415).

The present invention as described above is equipped with a video color converting device in the form of a chipset in the digital imaging system and the display system to obtain the optimal color image in real time during the video generation and display process, the difference in color represented in the existing digital imaging system Introduces a device-independent color space method to the video generation, transmission, and display system that has been performed without consideration of the display, and displays the image close to the original color of the captured image. By using the input to the TV has an effect that can provide the viewer with the best image.

Claims (12)

In the video color converter, The video input through the lens is converted into R, G, and B image signals through a charge coupled device (CCD) element, and the converted R, G, and B image signals are converted into a device independent color space to make a wired / wireless image. An input color conversion block provided over the transmission line; And a display color conversion block for converting a video signal converted into a device independent color space provided from the input color conversion block into a display device color space to provide a video for viewing by a viewer. Color inverter. The method of claim 1, wherein the input color conversion block, An image signal for selecting whether the image format to be outputted through the menu mounted in the form of an OSD (On Screen Display) or a switch is R, G, B or YCbCr. A selection unit; When the output image format is R, G, or B according to the selection result provided from the image signal selector, the normalized color expression characteristics and video conversion coefficients stored in the camera data storage unit are read, and thus the light source, gamma, and white luminance are read. Device-independent color space provided by converting to a video signal of R ', G', B 'format, which is a device-independent color space, using a standard value and a 3 × 3 matrix or look up table. A conversion unit; A camera data storage unit for storing the normalized color expression characteristics and video conversion coefficients; And a camera color space conversion unit converting and providing a video signal provided from the device independent color space conversion unit into a YCbCr format video signal in the device independent color space. The apparatus of claim 2, wherein the device-independent color space converter comprises: And a video signal is provided to perform a conversion process to the YCbCr format when the output video format is YCbCr according to the selection result provided from the video signal selection unit. The method of claim 1, wherein the display color conversion block, A video signal format searcher for searching whether the format of the video signal converted from the input color conversion block into the device independent color space is R ', G', B ', or YCbCr; According to a search result provided from the video signal format search unit, when the format of the video signal in the device independent color space is R ', G', B ', the standardized digital TV stored in the data storage unit of the display color conversion block or Read the 3x3 matrix or lookup table obtained by the inverse transformation of the monitor's color expression characteristics, video conversion coefficients, and 3x3 matrix or lookup table used in the input device color conversion chipset, and use it on the TV or monitor. When the display device color format is searched and the R, G, and B formats are used, color conversion is performed from the received device independent color space to R, G, and B, which is a device color space used by the TV or monitor, and the YCbCr format is changed. When used, color conversion from the device independent color space R ', G', B 'color space to the YCbCr color space is performed and then the final converted video is displayed. The following is the color space conversion unit; An ambient light adaptation menu selection unit configured to operate according to a control of the color space conversion unit and to select an ambient light adaptation data stored in an ambient light adaptation data storage unit in the display color conversion block according to a menu to realize an optimum image quality according to a viewing environment; Video color conversion apparatus using a color space, characterized in that it further comprises. The method of claim 4, wherein The color space converter converts the YCbCr color space from the YCbCr color space to R ', G', B 'when the video signal format, which is device independent color space, is YCbCr according to a search result provided from the video signal format searcher. After performing the color conversion, if the display color format used by the TV or monitor is searched and used in the YCbCr format, color conversion from the device independent color space to YCbCr, which is the device color space used by the TV or monitor, is performed. When using the G and B formats, the color conversion apparatus using the color space, which performs color conversion from the device independent color space to the device color space R, G, and B, and then displays the final converted video. . The method of claim 4, wherein the color space conversion unit, Video color conversion device using a color space, characterized in that the TV or monitor to control the selection of the ambient light adaptation menu for the optimal picture quality according to the viewing environment implemented in the form of an OSD (on screen display) or switch . In the video color conversion control method in a system having an input color conversion block and a display color conversion block, Inputting a video through the lens; Reading standardized color expression characteristics and video conversion coefficients stored in a camera data storage unit in a device independent color space conversion unit of the input color conversion block; R ', which is a device-independent color space, by reading the standardized color expression characteristics and video conversion coefficients and using a predetermined standard value for a light source, a gamma, and a white luminance value, and a 3 × 3 matrix or a look up table. Converting the video signal into a G, B format; First determining, by the video signal selector in the input color conversion block, whether the video format is R, G, or B or YCbCr for the video; Providing the video signal format search unit in the display color conversion block when the output video format is R, G, or B in the first determination step; Determining whether the format of the video signal converted into the device independent color space by the video signal format search unit is R ', G', B 'or YCbCr; In the second determination step, when the format of the video signal, which is a device independent color space, is R ', G', or B ', the color space converting unit in the display color conversion block may display an OSD (on screen display) or switch on a TV or monitor. Controlling an ambient light adaptation menu selection unit to select an ambient light adaptation menu for implementing an optimal image quality according to a viewing environment implemented in a form; An ambient light adaptation menu selection unit operated by the color space conversion unit to select an ambient light adaptation data stored in an ambient light adaptation data storage unit according to a menu to implement an optimal image quality according to a viewing environment; The 3x3 matrix obtained by inverse transformation of the 3x3 matrix or the lookup table used in the input device color conversion chipset and the color expression characteristics of the standardized digital TV or monitor stored in the data storage unit by the color space conversion unit; Reading a lookup table; Searching the display device color format used by the TV or the monitor while referring to the read matrix or lookup table by the color space conversion unit and determining whether the color space conversion unit is in R, G, B format or YCbCr format; If the R, G, B format is used in the third determination step, displaying a moving picture in which color conversion from the received device independent color space to R, G, B, which is a device color space used by a TV or a monitor, is performed. Video color conversion control method using a color space comprising a. The method of claim 7, wherein When the output image format is YCbCr in the first determination step, providing a video signal to a camera color space converter in the input color conversion block to perform a conversion process to a YCbCr format; And converting a video signal provided from the device independent color space conversion unit into a video signal having a YCbCr format in the device independent color space using the camera color space conversion unit and providing the video signal to the video signal format searcher. Video color conversion control method using color space. The method of claim 7, wherein In the second determination step, when the format of the video signal in the device independent color space is YCbCr, the color space conversion unit performs a color conversion from the YCbCr color space to the device independent color space R ', G', B ' Fourth determining a display color format; If the YCbCr format is used in the fourth determination step, the method further comprises displaying a video in which color conversion from the device independent color space to YCbCr, which is a device color space used by a TV or a monitor, is performed. Video color conversion control method using. The method of claim 9, If the R, G, B format is used in the fourth determination step, performing color conversion from the device independent color space to the device color space R, G, B, and then displaying the final converted video. Video color conversion control method using a color space, characterized in that. The method of claim 7, wherein If the YCbCr format is used in the third determination step, the method further includes displaying a moving picture in which color conversion from the R ', G' and B 'color spaces, which are device independent color spaces, to the YCbCr color space is performed. A video color conversion control method using a color space. The method of claim 7, wherein In the second determination step, when the format of the video signal, which is a device independent color space, is YCbCr, the color space conversion unit in the display color conversion block may be used in a viewing environment implemented as an OSD (on screen display) or switch on a TV or monitor. Controlling the ambient light adaptation menu selection unit to select an ambient light adaptation menu for realizing an optimum image quality; The ambient light adaptation menu selection unit operated by the color space converting unit may further include selecting an ambient light adaptation data stored in the ambient light adaptation data storage unit according to a menu to implement an optimal image quality according to a viewing environment. Video color conversion control method using color space.