KR20060099019A - Image control apparatus and method of television receiver - Google Patents

Abstract

The present invention provides an apparatus and method for significantly increasing the liveness of a moving image by increasing the brightness of the moving image and making the still image darker among the images output on the screen of the television receiver. And a first step of setting an image adjustment mode for adjusting color intensity and contrast of the still image; In the image adjustment mode, when image data is input, one or more moving images are detected from the input image data as the object of brightness adjustment, and the ratio of the detected one or more moving images to the entire screen of the screen is a predetermined main image size and sub-image. A second step of determining whether the detected video is larger than or smaller than the main video and the sub video, and determining other than the main video and the sub video as other video; And a third step of differentially adjusting the color density and contrast of the main image, the sub image, and the other image determined according to the predetermined main image brightness adjustment value, the sub image brightness adjustment value, and other image brightness adjustment values.

TV, movie, still image, brightness, adjustment

Description

Image control apparatus and method of television receiver

1 is a block diagram of an image adjusting device of a television receiver according to an embodiment of the present invention.

2A and 2B are a flowchart of a method of adjusting an image of a television receiver according to an embodiment of the present invention.

3A to 3C are screen diagrams for explaining an image adjusting process of a television receiver according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: image adjusting device 110: receiving signal processing unit

120: input signal processing unit 130: digital decoder

140: image processor 150: screen

160: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to television receivers, and more particularly, to an apparatus and method for differentially adjusting the brightness of moving images and still images among images output on a screen.

In the rapid development of information and communication, to the multimedia field that combines various forms of information such as video and audio, as well as the rapid development of technology such as electricity, electronics, computer and communication, these days, also called digital revolution And presence forms are becoming digital from analog. Due to the development of MPEG (Moving Picture Experts Group) technology, which is a compression standard for moving image data to compress digital image data that requires a relatively large amount of data, the size of digital image data is gradually getting smaller. Increasingly, digital video and audio services have been applied to almost all fields such as communication and telecommunications, and digital devices for providing such services have emerged.

Among them, broadcasting and TV occupy an important place as an easy and effective information transmission medium in daily life, and thanks to the digital technology described above, video data and audio data are compressed and transmitted by MPEG technology, thereby adding a large amount of information. With the advent of digital TV, which can provide fast and reliable, more broadcasts can be easily enjoyed at home with clearer picture quality and more vivid sound. In addition, video services in various fields such as sports, movies, and home shopping are provided, and types and amounts of video services provided by cable broadcasting, video-on-demand video, etc. are being increased, and such video services are provided through TV. It is usually provided to the viewer.

Accordingly, various technologies for adjusting the video signal output through the TV have been developed. For example, in Patent Application No. 2000-0072475, a user inputs a horizontal scan line number to be measured and generates a trigger signal corresponding thereto. By connecting the video signal and the trigger signal with an oscilloscope, the user can directly designate and measure the scanning line to be measured, as well as a video signal control device that can conveniently and easily measure the video signal from a low-priced product. Proposed technology.

Looking at the image signal control method proposed in the patent application briefly, the input unit for rotating the horizontal scanning line number to be measured by the user, and when the composite image signal to be measured is inputted to perform a signal protection function while suppressing the waveform distortion shape A signal separation unit for receiving the composite video signal from the buffer unit, receiving the composite video signal from the buffer unit, and separating the signal into a vertical synchronization signal, a horizontal synchronization signal, and a field separation signal, and counting the received signal. The microcomputer determines whether the input is normal and controls the increase / decrease of the horizontal line value to be displayed according to the horizontal scanning line number of the input unit, and receives the vertical synchronizing signal and the horizontal synchronizing signal of the signal separating unit and clears it during the vertical synchronizing period. clear by horizontal sync signal when vertical sync is completed. A counter unit for increasing / decreasing a count value for designation, and comparing a horizontal line value and a count value of the microcomputer unit and the counter unit to generate and output a trigger signal corresponding to the horizontal scanning line number of the input unit according to the comparison result. And a display unit for displaying a horizontal line value under the control of the microcomputer.

In the conventional video signal control device having such a configuration and function, since a desired scanning line is designated to measure a portion of the video signal during measurement, the video signal control apparatus can be used to measure the portion of the video signal. The brightness of the still image cannot be arbitrarily adjusted by the user arbitrarily, and as a result, the brightness of the moving image and the still image when the image is captured by the camera are output on the screen as it is, resulting in a drop in the vividness of the moving image.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an apparatus and method for differentially adjusting the brightness of moving images and still images among images output on the screen of a television receiver.

Another object of the present invention is to provide an apparatus and method for significantly increasing the liveness of a moving image by increasing the brightness of the moving image and making the still image darker among the images output on the screen of the television receiver.

In order to achieve the above object, the present invention provides an image adjusting apparatus of a television receiver that outputs a video signal received from a broadcasting station or a video signal input from an external device such as a video, to a screen, wherein the moving picture and the still image output to the screen are stopped. A main image size and a sub-image size used to classify the video into a main image and one or more sub-images are set according to a ratio of the video to the full screen of the screen, and the brightness of the main and sub-images is adjusted. When the main image brightness adjustment value and the sub-image brightness adjustment value used are set, and the other image brightness adjustment value used to adjust the brightness of other images other than the main image and the sub-image are set, and when the image data is inputted, A video is detected from the input image data according to the main image size and the sub image size. The detected moving picture is divided into the main image and the sub-image, the image other than the main image and the sub-image is divided into the other image, and the divided main image, the sub-image and the other according to the brightness adjustment values of the images. An image processor for differentially adjusting color intensity and contrast of an image; And a controller for controlling setting of the main image size and the sub-image size, controlling setting of brightness adjustment values of the images, and controlling the brightness of the image output to the screen by the image processor. .

The present invention provides a video adjusting method for adjusting a brightness of a video signal received from a broadcasting station or an image signal input from an external device such as a video, and outputting the brightness to a screen. A first step of setting an image adjustment mode for adjusting color intensity and contrast; In the image adjustment mode, when the image data is input, one or more moving images are detected from the input image data as the object of brightness adjustment, and the ratio of the detected one or more moving images to the entire screen of the screen is determined by a predetermined main image size and A second step of determining whether the detected video is larger than or smaller than the sub-picture and determining the detected video as the main video and the sub-video, and determining other images other than the main video and the sub-video as other video; And a third step of differentially adjusting the color density and contrast of the determined main image, sub image, and other images according to a predetermined main image brightness adjustment value, a sub image brightness adjustment value, and other image brightness adjustment values.

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

1 is a configuration diagram of an image adjusting device of a television receiver according to an embodiment of the present invention.

Referring to FIG. 1, the image adjusting device 100 of the present invention includes a reception signal processor 110 for processing a video signal received from a broadcasting station, and an input signal processor for processing a video signal input from an external device. 120, the digital decoder 130 for decoding the digital video signal input from the received signal processor 110 or the input signal processor 120, and the received signal processor 110, the input signal processor 120 or the digital decoder. The image processor 140 for adjusting the color density and contrast of the digital image signal input from the 130, the screen 150 for displaying the image signal output from the image processor 140, and the image processor 140. The control unit 160 for controlling the image processing process of the.

The reception signal processing unit 110 performs a function of processing a video signal received from a broadcasting station. When an analog video signal is input, the received signal processing unit 110 converts the input analog video signal into a digital video signal and immediately outputs it to the image processing unit 140. In addition, when the digital video signal is input, the digital video signal is output to the digital decoder 130.

The input signal processor 120 is configured to process an image signal input from an external device such as a video, a DVD, or a computer. When an analog image signal is input, the input signal processor 120 converts the input analog image signal into a digital image signal and immediately executes the image processor ( And outputs the input digital video signal to the digital decoder 130 when the digital video signal is input.

The digital decoder 130 decodes the digital image signal input from the reception signal processor 110 or the input signal processor 120 to form a signal suitable for the image processor 140, and then decodes the image data to the image processor 140. Will output

The image processor 140 detects a moving image and a still image detected from a digital image signal input from the reception signal processor 110, the input signal processor 120, or the digital decoder 130 under the control of the controller 160. To adjust the color density and contrast of the screen, but if a plurality of videos are detected, the video is divided into the main video and the sub-video according to the ratio of the video on the screen on the screen 150, that is, the size of the video. Adjust the color density and contrast of the image differentially. The image processor 140 adjusts the brightness of the main image and the sub-image according to the main image brightness adjustment value and the sub-image brightness adjustment value preset by the controller 160, and also other images that are images other than the main image and the sub image. Other image brightness adjustment values for adjusting the color density and contrast of the camera are also preset by the controller 160. The image processor 140 distinguishes the main image and the sub-image from the video output on the screen 150 according to the preset main image size and sub-image size. Here, since the image data input to the image processing unit 140 is input at 30 frames per second, the image processing unit 140 detects a moving image using the rate of change of the movement of the image per second. It is a technique being used.

The controller 160 controls the setting of the main image brightness adjustment value, the sub image brightness adjustment value, and other image brightness adjustment values in the image processor 140 according to a user's instruction input through a remote controller (not shown). A main image size and a sub image size used as reference values for dividing a video into a main image and a sub image are set in the image processor 140.

2A is a flowchart illustrating an image adjusting method of a television receiver according to an exemplary embodiment of the present invention, which illustrates a process of arbitrarily setting a main image and a sub-image size, a main image brightness adjustment value, and a sub-image brightness adjustment value in the image processing unit. will be.

Referring to FIG. 2A, when the user presses a menu button disposed on the remote controller (S201), as illustrated in FIG. 3A, the controller 160 displays the top menu items related to the function adjustment of the television receiver on the screen 150. It is displayed (S202). In the display process S202, the controller 160 displays a plurality of top menu items including the "image object adjustment" item on the screen 150, where the image object adjustment item is to be set in the image processor 140. This is a menu item to adjust the main image and sub image size, main image brightness adjustment value and sub image brightness adjustment value.

When the menu item is displayed, when the user presses a numeric button on the remote control to select the “image object adjustment” item (S203), the controller 160 displays the menu items linked to the lower path of the image object adjustment item in FIG. 3B. As shown on the screen 150 (S204). In the display process S204, the controller 160 sequentially displays the automatic object adjustment item, the manual object adjustment item, and the object adjustment OFF item, wherein the automatic object adjustment item is set in the image processor 140. It is a menu item to set main image and sub image size, main image brightness adjustment value and sub image brightness adjustment value as default value. The menu item for adjusting the sub-image brightness adjustment value, and the object adjustment off item is a menu item for stopping the function for adjusting the color density and contrast of the video.

In a state in which the menu items as shown in FIG. 3B are displayed, the user presses a button on the remote controller to select one menu item, and the controller 160 determines which menu item is selected by the user (S205).

If the automatic object adjustment item is selected in the determination process (S205), the controller 160 defaults to the main image and sub-image size, the main image brightness adjustment value, and the sub-image brightness adjustment value to be set in the image processor 140. Set to a value (S206). When the default value is set, the image processor 140 may adjust the color density and contrast of the video occupying a screen equal to or greater than the default value (for example, 30%) on the full screen including the still image and the video displayed on the screen 150. Adjust At this time, the image processing unit 140 increases the color density and contrast of the video by the default value, and when the default value for adjusting the color density and contrast of the still image forming the background of the video is set, Reduces the color density and contrast of still images.

If the manual object adjustment item is selected in the determination process (S205), as shown in FIG. 3C, the controller 160 adjusts the main and sub-image sizes and the brightness of the main image linked to the lower path of the manual object adjustment item. The value and the sub-image erection adjustment value are displayed on the screen 150 (S207). In the display process (S207), the main image and the sub-image size are given as 50% and 20%, respectively, and the main image brightness adjustment value and the sub-image brightness adjustment value are given as 10% and 20%, respectively, and also in the full screen. Movies and still images, which are smaller than 20% of the sub-picture size, are classified as other images, and these other image brightness adjustment values are given as 50%. However, the main image and the sub-image size, the main image brightness adjustment value, the sub-image brightness adjustment value and other image brightness adjustment values are set by way of example to explain the embodiment of the present invention, but are not limited thereto.

In this state, when the user instructs the setting using the button on the remote controller (S208), the controller 160 controls the main image size 50%, the sub image size 20%, and the main image brightness adjustment value 10% in the image processor 140. , 20% of the sub picture brightness adjustment value and 50% of the other picture brightness adjustment value are set (S209). When the brightness adjustment value of the image is set as described above, the image processor 140 designates a video that occupies 50% or more of the entire screen displayed on the screen 150 as the main image, and sets the color density and contrast of the specified main image. Increase the brightness of one main image by 10%, designate the video that occupies more than 20% of the entire screen as a sub-picture, and increase the brightness of the specified sub-image by 20%, which sets the color density and contrast of the specified sub-image, and full-screen Video and still images that occupy less than 20% are designated as other images, and the brightness of the specified other images is reduced by 50%.

If the object adjustment off item is selected in the determination process (S205), the controller 160 releases the " image adjustment mode " for adjusting the color density and contrast of the moving image and the still image (S210). When the image adjustment mode is released, the image processing unit 140 simply processes the input image data into an image signal suitable for the screen 150 and outputs it to the screen 150 without adjusting the color density and contrast of the input image data. do. At this time, the color density and contrast of the still image and the video output on the screen 150 are the same as the color density and contrast when captured by the camera.

On the other hand, such a setting process is not necessarily performed by using a remote controller, but may also be performed by using a menu button and a function button installed in a television receiver.

The process of adjusting the color density and contrast of the image data according to the main image and the sub-image size, the main image brightness adjustment value and the sub image brightness adjustment value arbitrarily set or defaulted through the above-described process will be described with reference to FIG. 2B. More detailed description is as follows.

Referring to FIG. 2B, when the user instructs the setting of the "image adjustment mode" using a remote controller or the like, the controller 160 may adjust the color density and contrast of the video and still image according to the brightness adjustment value set as shown in FIG. 2A. The image processor 140 is set to the "image adjustment mode" to adjust (S211).

When the image data is input from the digital decoder 130 in step S212, the image processing unit 140 detects one or more videos that are objects of brightness adjustment from the input image data in step S213. . The image processor 140 checks the ratio of the detected at least one video to the entire screen on the screen 150, that is, the size of the detected video (S214).

In the checking process (S214), the image processing unit 140 compares and checks whether the detected one video occupies the entire screen, that is, the size of the detected video is greater than or equal to the set main image size, and if the detected video is If it is determined that the size is smaller than the set main image size, compare and check whether the detected video size is greater than or equal to the set sub image size. Here, the set main image size is the default value or 50%, and the set sub-image size is 20% or the default value.

As a result of checking in the checking process (S214), if it is determined that the detected video size is greater than or equal to the set main video size, the image processing unit 140 determines the detected video as the main video, and if the detected video size is If it is determined to be smaller than the set main image size and larger than or equal to the set sub image size, the detected video is determined as the sub image. In addition, if it is determined that the size of the detected video is smaller than the set sub-image size, the image processor 140 determines the detected video and the still image as other images (S215).

If there is more than one video detected, the image processor 140 distinguishes the main video and the sub-video as in the determination process of the main video and the sub-image, but there is no video larger than or equal to the set main video size. In this case, only the sub-picture and the other video are distinguished and determined, and if there is no video larger than or equal to the set sub-picture, all the videos are determined as the other video. The determination method of the main image and the sub image is equally applied to the case where there is only one detected video. That is, even when only one moving picture is detected, one moving picture detected through the above-described determination process is determined as the main video, the sub-picture, or other video.

In the image determining process (S215), when the main image and the other image are determined, the image processor 140 increases the color intensity and contrast of the determined main image by the main image brightness adjustment value and sets the color density and contrast of the determined other image. The brightness of the other images is lowered by the set value (S216).

In the image determination process (S215), when the main image, one or more sub-images, and other images are determined, the image processor 140 increases the main image brightness adjustment value for setting the color density and contrast of the determined main image, and determines the one or more determined images. The color intensity and contrast of the sub-image are increased by the brightness adjustment value of the sub-image which is set, and the color intensity and contrast of the other image which is determined are lowered by the brightness adjustment value of the other image.

In the image determination process (S215), when one or more sub-images and other images are determined, the image processing unit 140 increases the color density of the determined one or more sub-images by the sub-image brightness adjustment value and sets the color concentration of the other image. And lower the brightness by the other video brightness adjustment value (S218).

In the image determination process (S215), if there is no video having a size greater than or equal to the set sub-picture size and all the images are determined as other images, the image processor 140 does not convert the color density and contrast of the input image data. The image data is processed and output to the screen 150 (S219).

Then, in the process of adjusting the color density and contrast (S216, S217, S218), the image processor 140 increases the color density and contrast of the main image by the set default value or the set main image brightness adjustment value 10%, the color of the sub-image Increases the density and contrast by 20% of the set default value or the set sub-image brightness adjustment value, and lowers the color density and contrast of the other image by the set default value or the set other image brightness adjustment value 50%.

On the other hand, if there is only one video detected in the detection process (S213), the image processor 140 determines one detected video as the main image or sub-image without going through the image determination process (S215), and the color of the image data. The present invention may be implemented to adjust the color density and the contrast of the main image or the sub-image as in the adjustment process of the density and contrast (S216, S217, S218).

As described above, the present invention brightens the video by increasing the color density and contrast of the video among the screens output on the screen 150 of the television set, and the color density and contrast of the still image which is the background on the screen. By lowering the background image, the still image is darkened, so that viewers can feel more lively about the moving image.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, according to the present invention, the brightness of the video is increased and the still image is darker among the images output on the screen of the television set, thereby increasing the liveness of the video and making the viewer more easily an important object. Try to focus on the video.

Claims (16)

In the video adjusting device of a television receiver for outputting a video signal received from a broadcasting station or a video signal input from an external device such as a video on a screen, A main image size and a sub-image size used to classify the video into a main image and one or more sub-images are set according to a ratio of the video and still images output on the screen to the entire screen of the screen. The main image brightness adjustment value and the sub image brightness adjustment value used to adjust the brightness of the main image and the sub image are set, and the other image brightness adjustment values used to adjust the brightness of other images other than the main image and the sub image are set. When the image data is input, the moving image is detected from the input image data according to the main image size and the sub image size, and the detected video is divided into the main image and the sub image, and the image other than the main image and the sub image. The image is classified into the other images, and the divided main image, sub image and other zeros according to the brightness adjustment values of the images. A differential video processor to make adjustments to the color saturation and contrast; And A control unit for controlling the setting of the main image size and the sub-image size, controlling the setting of the brightness adjustment value of the images, and controlling the brightness of the image output to the screen by the image processor Image adjusting device of the television receiver comprising a. The method of claim 1, The image processor determines a main image according to the main image size from the detected video, but determines a video occupying 50% or more of the entire screen of the screen as the main image image adjusting device of the TV receiver . The method of claim 2, The image processor determines a sub-image based on the sub-image size from the detected video, but determines a video occupying 20% or more of the screen as a sub-picture as a sub-image . The method of claim 3, wherein And the image processor determines a moving image and a still image smaller than the sub-image size as the other image among the images output on the screen. The method according to any one of claims 1 to 4, The image processor increases the color density and contrast of the main image by the brightness adjustment value of the main image, increases the color density and contrast of the sub-image by the brightness adjustment value of the sub-image, and adjusts the brightness of the other image by the brightness adjustment value of the other image. An image adjusting device of a television receiver, characterized by lowering color intensity and contrast. In the video adjusting method for the television receiver to adjust the brightness of the video signal received from the broadcast station or the video signal input from an external device, such as video, to output on the screen, A first step of setting an image adjustment mode for adjusting color intensity and contrast of moving images and still images output to the screen; In the image adjustment mode, when the image data is input, one or more moving images are detected from the input image data, and the ratio of the detected one or more moving images to the entire screen of the screen is determined by the predetermined main image size and A second step of determining whether the detected video is larger than or smaller than the sub-picture and determining the detected video as the main video and the sub-video, and determining other images other than the main video and the sub-video as other video; And A third step of differentially adjusting the color density and contrast of the determined main image, sub image, and other images according to a predetermined main image brightness adjustment value, a sub image brightness adjustment value, and other image brightness adjustment values; Image adjusting method of the TV receiver comprising a. The method of claim 6, In the second step, if the detected video is greater than or equal to the size of the main video, the detected video is determined as the main video. The method of claim 6, In the second step, if the detected moving picture is smaller than the main picture size and larger than or equal to the sub-picture size, the detected video is determined as the sub-picture. The method of claim 6, In the second step, if the detected moving picture is smaller than the sub-picture size, the detected video and the still image is determined as the other video image adjusting method of the television receiver. The method of claim 6, In the third step, when the main image and other images are determined among the images output on the screen, the color intensity and contrast of the main image are increased by the brightness adjustment value of the main image, and the color density and contrast of the other image are increased. And the other video brightness adjustment value is lowered. The method of claim 6, In the third step, when the main image, sub-images and other images are determined among the images output on the screen, the color intensity and contrast of the main image is increased by the brightness adjustment value of the main image, and the color density of the sub-image And increasing the contrast by the sub-image brightness adjustment value and lowering the color density and the contrast of the other image by the other image brightness adjustment value. The method of claim 6, In the third step, when the sub-image and the other image is determined among the images output on the screen, the color and the contrast of the sub-image is increased by the sub-image brightness adjustment value, and the color and the contrast of the other image A video receiving method of a television receiver, characterized in that lowering by other video brightness adjustment value. The method of claim 6, In the third step, if there is no video having a size greater than or equal to the sub-picture size among the images output on the screen, and all the images are determined as the other images, the color density and contrast of the input image data are not converted. The video adjusting method of the television receiver characterized by the above-mentioned. The method according to any one of claims 6 to 13, According to a user's instruction, setting the main image size and the sub-image size used to classify the detected video into the main image and the sub-image, and adjust the brightness of the main image used to adjust the brightness of the main image and the sub-image A fourth step of setting a value and a sub picture brightness adjustment value and setting the other picture brightness adjustment value used for brightness adjustment of the other picture which is an image other than the main picture and the sub picture. Image adjustment method of the TV receiver further comprising. The method of claim 14, The fourth step, Step 4-1 of displaying predetermined top-level menu items relating to the function adjustment of the television receiver according to a user's instruction on the screen; Among the top menu items, an image object adjustment item for adjusting the main image and the sub image size, the main image brightness adjustment value, and the sub image brightness adjustment value is selected, and linked to a lower path of the image object adjustment item. Step 4-2 of displaying an automatic object adjustment item, a manual object adjustment item, and an object adjustment off item on the screen; If the automatic object adjustment item is selected, setting the main image size and the sub-image size as default values, and setting the main image brightness adjustment value, the sub-image brightness adjustment value, and other image brightness adjustment values as default values; -3 step; When the manual object adjustment item is selected, setting the main image size and the sub image size selected by the user, and setting the main image brightness adjustment value, the sub image brightness adjustment value, and other image brightness adjustment values selected by the user. Step 4-4; Step 4-5 of canceling the image adjustment mode when the object adjustment off item is selected. Image adjusting method of the TV receiver comprising a. The method of claim 15, In step 4-4, predetermined main image sizes and sub-image sizes are displayed on the screen so that the user can select and set a desired main image size and a sub-image size, and a desired main image brightness adjustment value. And displaying predetermined main image brightness adjustment values, sub image brightness adjustment values, and other image brightness adjustment values on the screen to select and set the sub-image brightness adjustment values and other image brightness adjustment values. Image adjustment method of a television receiver.

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