KR100296286B1 - Apparatus and method for processing closed caption error in korean closed cation broadcasting program - Google Patents

Abstract

PURPOSE: A device and a method for processing caption in Korean caption broadcast provide viewers with clear picture by preventing caption indication when a channel is changed, a caption mode is turned off, or input of abnormal caption data is detected. CONSTITUTION: A device for processing caption in Korean caption broadcast includes a signal combining part(205) for switching video signal and character signal of an on-screen processing part(203) and transmitting the signals to a display part(206), a caption controlling part(208) for blocking transmission of character signal from the on-screen processing part to the signal combining part if control signal is enable, a controlling part for decoding caption data separated from video signal and transmitting caption data to the caption controlling part, and a caption error processing part(207) for outputting control signal to the caption controlling part if abnormal data is input for more than a predetermined period of time.

Description

Subtitle error handling apparatus and method for Korean subtitle broadcasting {APPARATUS AND METHOD FOR PROCESSING CLOSED CAPTION ERROR IN KOREAN CLOSED CATION BROADCASTING PROGRAM}

The present invention relates to a Korean subtitle broadcasting receiver, and more particularly, to an apparatus and method for processing caption error.

FIG. 1 is a block diagram of a conventional closed caption broadcasting apparatus, and as shown therein, an image processing unit 106 for image processing a received video signal Vi and a caption data separated from the received video signal Vi. The data slicer 101 for digital conversion, the microcomputer 102 for converting the caption data in the data slicer 101 into a signal for decoding and displaying on the screen, and the microcomputer 102 On-screen processing unit 103 for reading the font data in accordance with the output signal from the font storage unit 104 to generate a corresponding character signal, and the image signal from the image processing unit 106 to the character signal from the on-screen processing unit 103 A signal synthesizing unit 107 for synthesizing a signal and a display unit 105 for receiving an output signal from the signal synthesizing unit 107 and displaying an image and a subtitle on a screen.

Referring to the operation of the prior art as follows.

When the video signal Vi is input, the image processor 107 outputs an image signal to the signal synthesizer 105 through predetermined image processing.

Accordingly, when the caption data is not included in the video signal Vi, the signal synthesizing unit 105 outputs only the image signal from the image processing unit 107 to the display unit 106 so that only the image is displayed on the screen.

When the subtitle data is included in the video signal Vi, the data slicer 101 separates the subtitle data, converts them digitally, and outputs them to the microcomputer 102.

At this time, when the microcomputer 102 converts the font data into a signal for decoding and displaying, the on-screen processing unit 103 reads the font data corresponding to the subtitle signal from the font storage unit 104 to generate the corresponding character signal. do.

Accordingly, when the signal synthesizing unit 105 synthesizes and transmits an image signal of the image processing unit 107 and a text signal of the on-screen processing unit 103, the display unit 106 displays images and characters on the screen through a predetermined process. Mark together.

However, a Korean subtitle broadcast receiver may need to delete a subtitle in addition to a command for erasing a specified subtitle or memory with a transmitting and receiving party and subtitle data stored in a memory for displaying a subtitle displayed on a screen.

For example, when the viewer changes the reception channel or the viewer turns off the caption display function while watching the caption broadcast.

Therefore, in the related art, when a viewer changes a channel, the processed subtitle signal may appear on the screen of another channel at a moment, or when the subtitle signal does not normally receive the subtitle data, a subtitle that does not match the image may be displayed on the screen.

In order to solve the conventional problems, the present invention provides subtitle error processing for Korean subtitle broadcasting, which provides a clear image to viewers by preventing subtitle display when a channel switching, subtitle display mode off, or abnormal subtitle data input is detected. It is an object to provide an apparatus and method.

1 is a block diagram of a conventional caption processing apparatus.

2 is a block diagram showing an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

201: Data Slicer 202: Microcomputer

203: on-screen processing unit 204: font storage unit

205: signal synthesizing unit 206: display unit

207: caption error processing unit 208: caption display control unit

According to an aspect of the present invention, there is provided an apparatus for receiving Korean caption broadcasting and displaying captions with an image, the apparatus comprising: a signal synthesizer for switching video signals and text signals and transmitting them to a display unit; and fonts corresponding to caption data. An on-screen processor that reads data, generates a text signal, and transmits the text signal to the signal synthesizing unit; a caption display control unit for erasing the text signal stored in the on-screen processing unit when the control signal is enabled; A control unit for decoding the subtitle data separated from the video signal and transmitting the decoded subtitle data to the subtitle display control unit; Caption outputting a control signal for the caption display control unit Characterized in that it consists of an error processing unit.

In addition, the present invention provides a method for displaying a subtitle with a video by receiving a Korean subtitle broadcast in order to achieve the above object, determining whether the channel switching or subtitle display mode is off, and the channel switching or subtitle Determining whether abnormal caption data is received for a predetermined time when the display mode is not turned off; displaying an image and a caption when the caption data is not received; and capturing the caption data when the caption data is received. And displaying only an image by blocking data transmission.

The transmission blocking of the caption data is achieved by erasing the caption data stored in the display and non-display memory.

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

2 is a block diagram showing an embodiment of the present invention, as shown therein, an on-screen processing unit 203 for reading the font data from the font storage unit 204 according to the decoded subtitle signal and generating the corresponding character signal; A signal synthesizing unit 205 for synthesizing text data from the on-screen processing unit 203 with the received video data Vi, and an output signal from the signal synthesizing unit 205 to receive images and subtitles on a screen. A display slicer 206, a data slicer 201 for separating and digitally converting a caption signal from the received video signal Vi, and a caption signal from the data slicer 201 to be displayed on the screen. The microcomputer 202 which checks whether the channel switching from the outside or the caption mode off is enabled while converting to a signal for outputting, and the caption signal from the microcomputer 102 are checked to predefine the captions. A caption error processing unit 207 for determining whether there is a caption error according to whether data other than the card is input, and a channel switching or caption mode while transmitting a caption signal decoded by the microcomputer 202 to the on-screen processing unit 203. When the control signal of the subtitle error processing unit 207 by detecting an error in the control signal of the microcomputer 202 due to the off and the subtitle signal decoded in the microcomputer 202 is enabled, the on-screen processing unit 203 The subtitle display control unit 208 deletes all the subtitle data stored in the subtitle.

Referring to the operation and effect of the embodiment of the present invention configured as described above are as follows.

The data slicer 201 separates the subtitle signal from the received video signal Vi, converts it digitally, and outputs the digital subtitle signal to the microcomputer 202.

The microcomputer 202 decodes the caption signal input from the data slicer 201 while checking whether the channel switching signal or the caption mode off signal, which is an external signal, is enabled, and then the caption error processor 207 and the caption display controller 208. Output to

Then, the caption error processing unit 207 checks whether or not data other than the code determined by the caption broadcasting provider prescribed in the caption signal decoded by the microcomputer 202 is input.

In this case, the control signal according to the channel switching or the caption mode off is not output from the microcomputer 202 or the control signal from detecting the data other than a predetermined code by the caption error processing unit 207 for a predetermined time or more. If it is not output, the caption display control unit 208 outputs the caption signal decoded by the microcomputer 202 to the on-screen processing unit 203.

Accordingly, the on-screen processing unit 203 reads the corresponding font from the font storage unit 204 in accordance with the subtitle signal decoded by the microcomputer 202 to generate the subtitle data.

Therefore, when the signal synthesizer 205 synthesizes the caption data of the on-screen processing unit 203 to the video signal Vi at the set position, the display unit 206 processes the synthesized signal to display the image and the caption on the screen. .

If the subtitle error processing unit 207 which checks the subtitle signal decoded by the microcomputer 202 has input data other than a predetermined code for a predetermined time and the valid data is not input for a predetermined time, the valid data is not input. If the control unit outputs a control signal by determining that the control unit is not in use, or when the microcomputer 202 detects channel switching or caption mode off by the user and outputs the control signal, the caption display control unit 208 displays and hides the on-screen processing unit 203. The caption signal is not transmitted to the signal synthesizing unit 205 by erasing all caption data stored in the display memory.

Accordingly, since the caption data is not transmitted from the on-screen processor 203 to the signal synthesizer 205, the signal synthesizer 205 transmits only the video signal Vi, so that the caption is displayed on the screen of the display unit 206. Only missing images are displayed.

As described in detail above, the present invention prevents the display of subtitles that do not match the image by erasing the subtitle data when the viewer changes the channel or sets the subtitle mode off or fails to receive the subtitle data normally. There is an effect that can provide a clear image to the viewer.

Claims (4)

An apparatus for displaying a caption with an image by receiving a Korean caption broadcasting and generating a text signal corresponding to the caption in an on-screen processing means, the apparatus comprising: switching a video signal and a text signal of the on-screen processing means and transmitting the same to a display means; Subtitle display control means for blocking transmission of a text signal from the on-screen processing means to the signal synthesizing means when the signal synthesizing means are enabled, the subtitle data separated from the video signal, and controlling the subtitle display. A caption for controlling the caption data transmitted to the means and a caption signal for checking the caption data decoded by the control means and outputting a control signal for preventing caption display to the caption display control means when abnormal data other than a prescribed code is input for a predetermined time. Korean subtitle broadcasting, characterized in that it comprises an error processing means Membrane error processing unit. The Korean caption broadcasting according to claim 1, wherein the caption display control means erases the text signals stored in the on-screen processing means and the non-display memory when a control signal for preventing caption display is input. Subtitle error processing device. A method of displaying subtitles together with an image by receiving a Korean subtitle broadcast and generating a text signal corresponding to the subtitles, the method comprising: determining whether abnormal subtitle data is received for a predetermined time; And a second step of displaying the video and the subtitle together if not received, and a third step of displaying only the video by blocking transmission of the subtitle data when abnormal caption data is received. How to handle subtitle error 4. The method of claim 3, wherein the blocking of transmission of the caption data is achieved by erasing the caption data stored in the memory.