KR19990051888A - Screen output control method according to program class - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a screen output of a television, and more particularly, to a method for controlling a screen output according to a program class for controlling whether a monitor and a speaker are output according to a reception class of a program transmitted from a broadcasting station.

According to an aspect of the present invention, there is provided a method of controlling a screen output according to a program grade, the method of controlling a screen output using program grade data added to a broadcast signal, the method of setting a receivable grade to set the program receiveable grade, and the received channel to the selected channel. A program grade data extraction step of extracting program grade data added to the broadcast signal, a grade for comparing the grade of the program grade data extracted in the program grade data extraction step and the program receiveable grade set in the receivable grade setting step And an output control step of blocking output of demodulated video and audio signals when the set program receivable grade is lower than the grade of the extracted program grade data. As long as .

According to the present invention, it is possible to freely set a program of a class that a user can receive, and to block output of a program above a set level.

Description

How to control screen output according to program class

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a screen output of a television, and more particularly, to a method for controlling a screen output according to a program class for controlling whether a monitor and a speaker are output according to a reception class of a program transmitted from a broadcasting station.

Conventionally, when a broadcasting station transmits a video and audio signal related to a broadcast program from a broadcasting station, it is received by a television, demodulates the video and audio signals, and outputs a video signal to a monitor and a sound signal to a speaker.

However, with the diversification of the functions of television, broadcasting and video signals are loaded with additional information on the basis of transmitting and receiving video and audio signals. For example, in order to facilitate reservation recording, a broadcasting station inserts and transmits information related to a television program into a specific portion of a video signal in which a video signal is not output, and extracts and reserves program information added to the video signal at a receiving end. Not only can the schedule recording be easily used when setting the recording, but also the program can be easily found and watched while checking the broadcasting order of each broadcasting station.

As the functions of television become more diversified, broadcasting stations divide broadcasting programs into classes according to their contents in addition to broadcasting program information, and divide them into programs that only adults can watch or programs that family can watch together. Up to the broadcast program information has been reached.

However, the conventional TV has been proposed to receive a broadcast program and a method of utilizing the information, but the method of controlling the output of the broadcast signal according to the broadcast program grade is not presented, so that it is always output regardless of the broadcast program grade. There was a problem that the output can not be controlled according to the broadcast program grade.

SUMMARY OF THE INVENTION In order to solve the above problems, a technical problem of the present invention is to extract a signal related to a program class contained in a broadcast program information signal, and to control a screen output control method according to a program class to compare the output with a set reception class. To provide.

1 is a flowchart illustrating a screen output control method according to a program grade according to the present invention.

2 is a block diagram of an analog television receiver to which the present invention is applied.

3 is a block diagram of a digital television receiver to which the present invention is applied.

In accordance with one aspect of the present invention, there is provided a method for controlling a screen output according to a program grade according to the present invention. A program grade data extracting step of extracting program grade data added to the broadcast signal received through the selected channel, a program receiving grade set in the receiveable grade setting step and the program grade data extracted in the program grade data extracting step As a result of the comparison between the grade comparison step and the grade comparison step, if the set program-receivable grade is lower than the grade of the extracted program grade data, output of the demodulated video and audio signal is blocked. Characterized in that it comprises a control step.

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

As shown in FIG. 1, the screen output control method according to the reception level according to the present invention includes a reception level setting step 11, a program rating data extraction step 12, a program rating comparison step 13, and an output blocking step. (14), the normal output step 15, and the subtitle display step 16.

2 is a block diagram of an analog television receiver to which the present invention is applied, and includes an antenna 201, a tuner 202, an audio signal processor 203, a video signal processor 204, a slicer 205, and a decoder 206. , Control unit 207, character generator 208, first switch 209, and second switch 210.

3 is a block diagram of a digital television receiver to which the present invention is applied, and includes an antenna 301, a demodulator 302, a channel decoder 303, a demultiplexer 304, a video decoding & extension 305, and an audio decoding & extension. The unit 306, the switching unit 307, the grade data separation unit 308, and the control unit 309.

2 and 3, the present invention will be described in detail with reference to the flowchart of FIG.

In the reception level setting step 11, one level G _s is set among program reception level classes that classify viewable ages according to contents of a program transmitted from a broadcasting station. For example, the program reception rating may be divided into ALL → G → PG → PG-13 → R → NC-17 → X → NR, where ALL is the lowest level that viewers of all levels and ages can watch regardless of the rating setting. Class means a program, and NR corresponds to the highest level.

Therefore, when the user wants to output only the programs received below the PG-13 level among the reception grades through the CRT and the speaker, the PG-13 can be set as the receiveable level by using the external function key and the remote control key of the TV.

Program ratings data to the extraction step 12, the extracting only a program transmitted with the broadcast program signals from a broadcast station data rates (G _i).

A method of extracting program grade data is described in detail as follows.

In the case of the analog television receiver of Fig. 2, the audio signal and the video signal of the selected channel are demodulated by the tuner 202 and output.

Then, the video signal processor 204 demodulates the video signal and outputs it, and the slicer 205 extracts only program grade data G _i added to a specific position of the demodulated video signal. Then, after passing through the decoding unit 206, it is input to the control unit 207.

In the case of the digital television receiver of FIG. 3, the demodulator 302 and the channel decoder 303 for canceling the error correction code are output, and then the program data selected by the demultiplexer 304 is output. Only the program grade data G _i is separated from the resulting bitstream and then output to the controller 309.

In the program class comparison step 13, the class G _s set in the receivable class setting step 11 is compared with the received program class G _i separated in the program data extraction step 12.

That is, the program level G _s set by the control unit 207 of FIG. 2 and the control unit 309 of FIG. 3 are compared with the received program class G _i to determine which class corresponds to a higher level.

As a result of determination, if the set program grade G _s is lower than the received program grade G _i , since the received broadcast program is not a program that can be viewed, an output blocking step 14 and a subtitle display step 16 are performed. Run

However, if the program grade G _s set as a result of the determination is equal to or higher than the received program grade G _i , since the received broadcast program corresponds to a viewable program, the normal output step 15 is executed.

That is, the output blocking step 14 controls the first and second switches 209 and 210 of FIG. 2 so that audio signals and video signals of the audio signal processor 203 and the video signal processor 204 are not output to the speaker and the CRT. do.

Also in the case of the digital television of FIG. 3, the control unit 309 controls the switching unit 307 so that the video signal and the audio signal of the signals output from the video decoding and extension unit 305 and the audio decoding and extension unit 306 are output. Blocks output to speakers and CRTs.

In the subtitle display step 16, the control unit 207 controls the text generation unit 208 and the second switch 210 to output a text message indicating that the program is blocked due to the high grade of the received program instead of the normal video output. It informs the user why the screen and speaker output are cut off.

In the normal output step 15, the first and second switches 209 and 210 or the switching unit 307 are controlled to normally output the received and processed video signal and audio signal to the speaker and the CRT.

After setting a program class that can be received according to the above flow chart, a program of the same or lower level as the set program level is normally output, and when a program higher than the set program level is received, the video signal and the audio signal are the speaker. And block output to the CRT.

As described above, according to the present invention, by setting a class of a broadcast program that can be received and controlling to output only a program corresponding to a class lower than or equal to the set level, the user can freely set a program of a class that can be received by the user. The output of the program has the effect of blocking.

Claims (2)

In the screen output control method using the program grade data added to the broadcast signal, A reception level setting step of setting the program reception level; A program grade data extraction step of extracting program grade data added to the broadcast signal received through a selected channel; A grade comparison step for comparing the grade of the program grade data set in the receive grade level setting step with the grade of program grade data extracted in the program grade data extraction step; And And an output control step of blocking output of demodulated video and audio signals when the set program reception level is lower than the extracted program level data as a result of the comparison of the level comparison step. How to control screen output according to rating. The method of claim 1, wherein the output control step further comprises generating a subtitle indicating that the program is of a grade that cannot be received when the output is blocked.