KR100738665B1 - Apparatus for sustaining caption of television and method thereof - Google Patents

Abstract

An apparatus for maintaining a caption on TV and a method therefor are provided to allow a user to continuously view a score caption while sports relay broadcasting is provided by continuously maintaining and updating the score caption when the sports relay broadcasting is provided through the TV. An OSD(On Screen Display) generating unit(30) generates an OSD picture. An image signal processing unit(20) receives a digital image signal and an image signal generated in the OSD generating unit(30), and processes and outputs the digital image signal and the image signal to be displayed. A caption storing unit(80) stores a caption region of an image frame processed in the image signal processing unit(20). A motion comparing unit(90) compares motion change in the caption region. A microcomputer(40) stores the caption region set up in a displayed image in the caption storing unit(80), and controls the image signal processing unit(20) to process an image signal of the caption region stored in the caption storing unit(80) through the OSD generating unit(30).

Description

Subtitle maintainer and method of television {APPARATUS FOR SUSTAINING CAPTION OF TELEVISION AND METHOD THEREOF}

1 is a block diagram schematically showing the configuration of a general television.

2 is a diagram illustrating a score caption displayed on a screen of a television.

3 is a block diagram schematically showing a caption holding device of a television according to the present invention.

4 is a flowchart illustrating a method for maintaining captions in a television according to the present invention.

   -Explanation of symbols for the main parts of the drawings-

10: AD converter 20: video signal processing unit

30: OSD generator 40: microcomputer

50: memory 60: key input unit

70: video display device 80: subtitle storage unit

90: motion comparison

The present invention relates to a caption maintaining apparatus and method of a television, and more particularly, to continuously maintain and update score captions when a sports relay is performed through a television, so that the captions can be continuously viewed during the sports relay. The present invention relates to a subtitle holding device of a television and a method thereof.

The digitalization of information spread from the computer industry to the information and communication industry has recently spread to television broadcast signals, and the importance of display devices increases with the development and spread of information processing systems. It's getting mad.

In addition, the CRT (Cathode Ray Tube), which is most commonly used as a display device such as a television, has various problems such as large size, high operating voltage, and display distortion. Recently, research and development of various flat panel display devices having a matrix structure have been actively conducted because they are not suitable for the trend.

In other words, the flat panel display device has a matrix structure, which displays a stable image free from display distortion and color bleeding, and has a flat structure, is thin, and has a low operating voltage. It can be applied to the field.

1 is a block diagram schematically showing the configuration of a general television.

As shown here, the key input unit 60 for inputting a user's request command through a remote controller or a main body button, and the input horizontal / vertical synchronizing signal (H-Sync / V-Sync) and clock Clk. According to the microcomputer 40 to determine the input image format and output a control signal to the display according to the format, and a memory for storing data and setting values for controlling various systems in accordance with the control signal of the microcomputer 40 50, an OSD generator 30 for generating an OSD screen according to the control signal of the microcomputer 40, an AD converter 10 for converting an analog video signal into a digital video signal, and an AD converter 10. Image signal processing unit 20 and the image signal processing unit 20 for outputting a digital R, G, B image signal to the image processing to receive and display the digital image signal and the video signal output from the OSD generator 30 output from the Zero output from) And an image display device (LCD or PDP) 70 for displaying a phase signal.

In the television configured as described above, when a user inputs a desired command through the key input unit 60, and converts the analog video signal input from the AD converter 10 into a digital video signal according to the control signal of the microcomputer 40, the video signal. The digital R, G, and B image signals input from the processor 20 are displayed on the image display device 70 by screen adjustment and various image processing.

When watching a sports relay through such a television, as shown in FIG. 2, the score caption is displayed at a certain position on the screen of the video display device 70 so as to determine the progress of the game, but the score caption is continuously displayed during the relay. It is displayed intermittently, such as not being displayed for a certain period of time, and then disappearing. When you watch a game after you leave, if the score subtitle disappears, you have to be wondering what the current score will be until you see it again. have.

The present invention was created to solve the above problems, and an object of the present invention is to continuously maintain and update the score subtitles when a sports relay is performed through a television, so that the score subtitles can be continuously viewed during the sports relay. The present invention provides a subtitle holding device and method thereof.

In accordance with an aspect of the present invention, there is provided an apparatus for maintaining a caption of a television according to an embodiment of the present invention, including an OSD generator for generating an OSD screen, a digital image signal, and a video signal output from the OSD generator to display and process the image. A caption storage unit for storing a caption area of a video frame processed by the signal processor, a motion comparator for comparing motion changes in the caption area, and a caption area set in the displayed image. And a microcomputer for controlling the video signal of the caption area stored in the caption storage unit to be processed by the video signal processor through the OSD generator according to the comparison value of the motion comparator.

In addition, according to the present invention, a method of maintaining a caption of a television includes a first step of setting a caption area in which a caption to be displayed is displayed on a displayed screen, and a second caption area storing the caption area set in an input image frame to a caption storage unit. And a third step of detecting a motion change amount of the caption area in the image frame inputted after being stored in the caption storage unit, and returning to the second step if the motion change amount detected in the third step is less than the reference value. A fourth step of repeating the operation, a fifth step of displaying the subtitles stored in the subtitle storage unit on the screen when the amount of motion variation detected in the third step is equal to or greater than a reference value, and a motion change amount of the subtitle area in the input image frame while displaying the stored subtitles In the sixth step of detecting the step and if the motion change amount detected in the sixth step is less than the reference value The method returns to step 5 and repeats. If the reference value is greater than or equal to the reference value, the displayed subtitle is removed and the step 7 returns to the second step.

In the present invention, the setting of the caption area is characterized by setting the width and position of the setting area through a cursor.

When the subtitle area is set to be maintained while watching a broadcast, the present invention is stored in the subtitle storage unit displayed in the set subtitle area, and the subtitle disappears through the amount of motion change when the subtitle disappears from the subtitle area set on the screen. Subtitles are kept by judging by displaying the subtitles stored in the subtitle storage unit.If subtitles are displayed again, the subtitles are kept while watching the broadcast by deleting the displayed subtitles and displaying the subtitles displayed in the input video. Not only that, but also updated as the subtitle contents change.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings, and the same parts as in the prior art use the same reference numerals and names. In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only and those skilled in the art will be capable of many modifications within the technical spirit of the present invention.

3 is a block diagram showing a caption holding device of a television according to the present invention.

As shown here, the key input unit 60 for inputting a user's request command through a remote controller or a main body button, and the input horizontal / vertical synchronizing signal (H-Sync / V-Sync) and clock Clk. According to the microcomputer 40 to determine the input image format and output a control signal to the display according to the format, and a memory for storing data and setting values for controlling various systems in accordance with the control signal of the microcomputer 40 50, an OSD generator 30 for generating an OSD screen according to the control signal of the microcomputer 40, an AD converter 10 for converting an analog video signal into a digital video signal, and an AD converter 10. Image signal processing unit 20 and the image signal processing unit 20 for outputting a digital R, G, B image signal to the image processing to receive and display the digital image signal and the video signal output from the OSD generator 30 output from the Zero output from) And an image display device (LCD or PDP) 70 for displaying a phase signal.

In addition, a caption storage unit 80 for storing a caption area of an image frame processed by the video signal processor 20 for caption maintenance, and a motion comparator 90 for comparing motion changes in the caption area are further included. And the caption area set in the displayed image to be stored in the caption storage unit 80, and OSD generation of the video signal of the caption area stored in the caption storage unit 80 according to the comparison value of the motion comparator 90 is performed. A function of controlling the image signal processing unit 20 to be processed through the unit 30 is added to the microcomputer 40.

Therefore, in general, when a user wants to watch a broadcast, when a user inputs a desired command through the key input unit 60, the analog video signal input from the AD converter 10 according to the control signal of the microcomputer 40 is converted into a digital video signal. When converted, the screen is adjusted and various image processing is performed on the digital R, G, and B image signals input from the image signal processing unit 20 and displayed on the image display device 70.

If you want to keep the subtitle on the screen displayed on the video display device, that is, if you want to continue to watch the score subtitles in sports relay set the subtitle area through the key input unit 60 to save the subtitle displayed in the subtitle area Stored in the 80 and the motion comparator 90 detects the amount of motion change in the set caption area of the previous video frame and the current video frame and judges that the displayed caption disappears when the reference value is higher than the reference value to the caption storage unit 80. Displayed subtitles are displayed through the OSD generator, and the motion change amount is detected while maintaining the subtitles through the OSD generator 30, and when the subtitles are displayed again, the subtitles displayed are removed and the subtitles are displayed again through the displayed image. By doing so, the subtitles of the original video and the stored subtitles are alternately maintained.

In addition, the method for maintaining the caption of the television by the caption retaining apparatus of the television according to the present invention made as described above will be described with reference to the flowchart for explaining the method for maintaining caption of the television according to the present invention shown in FIG.

First, in order to maintain the caption, the caption area is set while moving the width and the position of the cursor through the key input unit 60 in the currently broadcast screen (S10).

When the caption area is set as described above, the caption area set in the currently broadcast video frame is stored in the caption storage unit 80 (S20).

Then, the amount of motion change between the previous video frame and the current video frame is detected for the set subtitle area (S30).

The detected motion change amount is compared with the reference value (S40).

That is, since the subtitles are always displayed in letters and logos at a certain position as shown in FIG. 2, when the subtitles are displayed or disappeared while the subtitles are displayed, the amount of motion change in the corresponding area has a very large value. do.

Accordingly, by comparing the amount of motion change in the set subtitle area, it is possible to determine when the subtitle disappears and when it appears.

When the detected motion change amount and the reference value are less than the reference value as described above, the subtitle is not changed and the image frame of the subtitle area which is continuously displayed is stored in the subtitle storage unit 80 (S20).

When the subtitles are stored in the subtitle storage unit 80 and the motion change amount is greater than the reference value, the displayed subtitles are judged to disappear. Then, the subtitles stored in the subtitle storage unit 80 are read and the video signal is transmitted through the OSD generator 30. By processing, the display is made possible to continue watching (S50).

In order to determine that the caption is displayed again while displaying the caption stored in the caption storage unit 80 as described above, the amount of motion change in the caption area is detected (S60).

When the amount of motion change is detected and less than the reference value, there is no change, and the subtitle stored in the subtitle storage unit 80 is displayed continuously. If the reference value is higher than the reference value, the subtitle is judged to be displayed again and the video signal input by removing the displayed subtitle is removed. Subtitles by can be viewed (S80).

When the caption is displayed again as described above, the caption, which may have been changed, is renewed by storing the set caption area in the caption storage unit 80 (S20).

The subtitles stored in this way and the subtitles of the original image are alternately displayed so that the subtitles can be maintained and viewed continuously during the relay.

As described above, the present invention continuously maintains and updates the score subtitles when the sports relay is performed through the television, and continuously displays the subtitles of the original image and the stored subtitles alternately while the sports relay is performed. There is an advantage that you can see the subtitles.

Claims (3)

An OSD generator for generating an OSD screen; A video signal processor for receiving a digital video signal and a video signal output from the OSD generator and outputting the video signal to be displayed; A caption storage unit for storing a caption area of an image frame processed by the video signal processor; A motion comparison unit for comparing the motion change in the subtitle area; The caption area set in the displayed image is stored in the caption storage unit, and the video signal of the caption area stored in the caption storage unit is processed by the video signal processor through the OSD generator according to the comparison value of the motion comparator. Microcomputer to control Subtitle maintenance device of a television, characterized in that consisting of. A first step of setting a subtitle area in which a subtitle to be maintained is displayed on the displayed screen; A second step of storing the caption area set in the input image frame in a caption storage unit; A third step of detecting a motion change amount of the caption region in the video frame which is stored after being stored in the caption storage unit; A fourth step of returning to the second step and repeating when the motion change detected in the third step is less than the reference value by comparing with the reference value; A fifth step of displaying the subtitle stored in the subtitle storage unit on the screen when the amount of motion change detected in the third step is equal to or greater than the reference value; Detecting a motion change amount of the caption area in the image frame input while displaying the stored caption; The motion change amount detected in the sixth step is compared with the reference value and is returned to the fifth step if the reference value is less than the reference value. If the motion change amount is greater than the reference value, the displayed subtitle is removed and returned to the second step. 7 steps Subtitle maintenance method of the television, characterized in that consisting of. The method of claim 2, wherein the setting of the caption area is performed by changing a width and a position of the setting area through a cursor.

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