KR20000045187A - Method for blocking channel in television receiver - Google Patents

Abstract

PURPOSE: A method for blocking a channel in a television receiver is provided to block specific channels for preventing reception of broadcasting channel with restricted ratings. CONSTITUTION: A method for blocking a channel in a television receiver comprises the steps of: setting up or releasing a blocking mode to block a designated RF channel; determining whether a selected channel is a setup blocking mode, or not when selecting a channel; blocking a sound signal, a video signal, and a caption signal of the corresponding channel if the selected channel is the setup blocking mode; and receiving normally video signals and displaying the received video signals if the selected channel is the setup blocking mode.

Description

Method of blocking channels in a television receiver

The present invention relates to a method of blocking a particular channel in a television receiver.

In general, a program provided by a television broadcast or VCR may be viewed by anyone regardless of its contents, so that a minor may watch an adult program. In order to solve this problem, in television broadcasting, the age that can be watched for a specific program is displayed on a part of the displayed screen or the rating is classified according to the content of the program to restrict a minor from watching an adult program.

However, such conventional methods cannot prevent a minor from watching a program that is not allowed. Therefore, if a program source is not permitted to include rating-related information, there is a technology to prevent the program from being displayed. Developed. In other words, in order to prevent indiscriminate viewing, as the minors watch a violent program as a social problem, the corresponding program is displayed only when the rating is included in the source of the program. Such rating information is usually carried on the 21st horizontal line 21H corresponding to the vertical retrace period, and decoded by the "V (chip)".

However, during trick-play (e.g., CUE, REV, STILL, SLOW, etc.) that is not normal play in VSI, it is not allowed to decode the line containing the rating information. There is a problem that does not prevent the screen from being displayed. That is, there is no way to prevent unauthorized programs from being displayed when receiving the output of the VCR on RF channel 3 or channel 4 of the television receiver after trick-playing the VCR.

Accordingly, the present invention has been proposed to solve the above problems, and provides a method of blocking specific channels of a television in order to prevent a grade not displayed by a trick play from being displayed on a television receiver. have.

In order to achieve the above object, the method of the present invention is a television receiver that is capable of receiving and displaying a video signal reproduced in VSI through an RF channel,

Setting or releasing a blocking mode to block the designated RF channel; Determining whether the channel selected at the time of channel selection is a channel set to a blocking mode; Blocking sound, video, and caption signals of the channel if the channel is blocked as a result of the determination; And if it is not the blocked channel as a result of the determination, normal reception and display.

1 is a block diagram showing a television receiver to which the present invention is applied;

2 is a flowchart illustrating a method of setting a blocking mode of a specific channel according to the present invention;

3 is a flow chart illustrating a method of blocking a particular channel in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

102: tuner 104: IF demodulator

106: voice processing unit 108: voice amplifier

110: speaker 112: image processing unit

114: video amplifier 116: CRT

120: decoder 122: caption OSD unit

124: micom 126: remote control receiver

128: remote control transmitter

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

As shown in FIG. 1, a television receiver to which the present invention is applied includes: a tuner 102, an IF demodulator 104, a voice processor 106, a voice amplifier 108, a speaker 110, an image processor 112, The video amplifier 114, the CRT 116, the decoder 120, the caption OSD 122, the microcomputer 124, the remote controller receiver 126, and the remote controller transmitter 128 are configured.

1, the tuner 102 receives a radio frequency (RF) broadcast signal from an antenna ANT and outputs an intermediate frequency (IF) signal of a channel selected according to a predetermined tuning signal input from the microcomputer 124, The IF demodulator 104 demodulates the intermediate frequency signal and outputs a composite video signal and an FM modulated audio signal.

The voice processing unit 106 receives the FM modulated audio signal from the IF demodulator 104 and demodulates the first channel (4.5 MHz) audio signal and the second channel (4.72 MHz) audio signal, respectively, and matrixes the demodulated audio signal. The circuit processes the audio mode and outputs the R channel and the L channel speaker 110 through the voice amplifier 108. At this time, the voice processing unit 106 detects the pilot signals (149.9 Hz, 176.0 Hz) from the pilot carrier (typically 55.1 KHz) and determines whether it is stereo broadcasting or voice multiple broadcasting to control the matrix circuit.

The image processor 112 separates the vertical and horizontal synchronization from the composite video signal, separates the luminance signal Y from the color difference signal C, and processes the matrix to output R, G, and B signals. The output of the image processor 112 is amplified enough to drive the CRT in the image amplifier 114 and then displayed in the CRT 116.

The decoder 120 receives vertical and horizontal synchronous signals from the image processor 112 and latches a signal of a horizontal line carrying a rating signal to decode the data. For example, when data is loaded on the 21st horizontal line, the horizontal synchronization signal is counted by the counter reset by the vertical synchronization signal, and the 21st horizontal line signal is received. The ratings decoded by the decoder 120 are transmitted to the microcomputer 124. When the decoder 120 also functions as a caption decoder, the caption OSD signal is input and played back, and then the data is output to the caption OSD unit 122. The caption OSD unit 122 generates a text image signal according to the data to generate an image amplifier. Output to (114).

The microcomputer 124 controls the operation of the system according to the user's control input through the remote control transmitter 128 and the remote control receiver 126 or the user's control input through a key matrix (not shown). And outputs the image quality control signals such as brightness, contrast, SHARPNESS, COLOR, TINT, etc. to the image processing unit 112. To control the image quality. Then, the sound control signal such as volume, treble, bass, balance, etc. is output to the voice processor 106 to control sound quality. Herein, the microcomputer 124 has various registers, ROMs, and RAMs embedded therein, but may be used with an external memory if necessary. The microcomputer 124 performs a procedure of blocking a specific channel by performing the procedure of FIGS. 2 and 3 according to the present invention.

2 is a flowchart illustrating a method of setting a blocking mode of a specific channel according to the present invention. Referring to FIG. 2, in step 201, it is determined whether a channel blocking key is input. If the channel blocking key is input as a result of the determination, in step 202, the channel number to be blocked is received. At this time, you can display a message requesting channel number input through the OSD, select a channel by menu method, or input numbers directly through the remote control or key matrix. In step 203, the input channel is set to the blocking mode. In the embodiment of the present invention, the channels are RF channels 3 and 4 input from VCR. In other words, the present invention has a meaning in preventing the display through the television receiver during the trick play in VCR (VCR) is enough to block only channel 3 and channel 4.

If it is not the channel blocking key in step 201, it is determined in step 204 whether it is a deblocking key. If the result of the determination in step 204 is a deblocking key, the channel number to be deblocked is input in step 205, and the blocking mode of the channel input in step 206 is released.

3 is a flow chart illustrating a method of blocking a particular channel in accordance with the present invention. Referring to FIG. 3, in step 301, it is determined whether the channel currently tuned in is channel 3 or channel 4 when the user selects a channel. As described above, in the present invention, since the channel to be blocked is channel 3 or channel 4, whether the current channel is the blocked channel is determined only in the channel 3 and the channel 4. If the current channel is channel 3 or channel 4, it is determined in step 302 whether it is the blocking mode. At this time, the setting and the release of the blocking mode are performed in advance by the procedure of FIG. 2.

If the determination result in step 302, the blocking mode, the sound, video, and caption of the channel is blocked in step 303, and if the channel 3 or channel 4 is not or in the blocking mode, the normal operation is performed in step 304.

As described above, the present invention blocks the viewing of RF channels 3 or 4 of the television receiver in the V-chip compatible video device that enables hardware viewing of the program according to the viewing grade. Trick play has the effect of restricting the viewing of illegal programs through RF channel 3 or channel 4.

Claims (1)

In a television receiver that is capable of receiving and displaying a video signal reproduced in VSI through an RF channel, Setting or releasing a blocking mode to block the designated RF channel; Determining whether the channel selected at the time of channel selection is a channel set to a blocking mode; Blocking sound, video, and caption signals of the channel if the channel is blocked as a result of the determination; And And if the channel is not the blocked result of the determination, normally receiving and displaying the channel blocking method.