KR19990043324A - Screen mute and message output method when child lock signal is detected in composite television - Google Patents

Abstract

The present invention relates to a composite television that mutes the screen and outputs a message upon detection of a child lock signal recorded on a control track of a video tape reproduced by a video cassette recorder (TVCR). When playing videotape, it can be handled regardless of gender, age and age, so child lock signal is recorded on adult videotape to protect minors. In the present invention, when the child lock signal is detected when the child lock signal is recorded, when the child lock signal is detected, the screen is muted and a message for inputting the password is output. If the password is correct, the playback is executed. The present invention provides a method of screen muting and message output upon detecting a child lock signal of a composite television that stops playback.

Description

Screen mute and message output method when child lock signal is detected in composite television

The present invention relates to the playback of a video cassette recorder (VCR) included in a composite television. In particular, when a child lock signal is detected from a control signal recording area of a video tape that cannot be viewed by a child, the screen to be played is muted and the OSD is muted. It outputs a message to confirm the password on the screen.If the user inputs the same password as the recorded password, the user can play the video signal.If the password is incorrect, the screen mute is detected when the child lock signal is detected. The message output method.

The child lock signal is recorded by changing the duty ratio of the control pulse in the area where the control signal of the adult videotape is recorded in order to protect the minor from the adult videotape. In other words, it is a minor prohibition signal, hereinafter referred to as child lock.

In general, the TVCR, which is a composite television, is an integrated type of a TV (Television) and a Video Cassette Recorder (VCR), and is supplied with a single power supply and is controlled by a system control (hereinafter referred to as Syscon). ) And a timer microcomputer (hereinafter referred to as timer [Timer]) that controls the entire system of TVCR. Each component is operated, and recording and playback of television broadcast signals, recording and playback of other cassette tapes, As a device used for broadcast recording, reservation recording, and absence recording of a channel, an AC bias method with low noise is adopted because there is no residual magnetic field due to a bias magnetic field even when recording on a cassette tape. The recording of the audio signal is relatively narrow in frequency range of 20-20000 Hz, and the phase relationship is not a problem. This being done the alternating-current bias method because. However, the frequency modulation (FM) recording method has been adopted for recording video signals because its frequency range is wide, about 0-4 MHz, and strict phase characteristics are required to faithfully reproduce waveforms. On the other hand, recording a television signal using a VCR is to record a control signal for generating an audio signal, a video signal of a television, and various control signals at the time of reproduction at different positions of the video tape. The configuration of the VCR for recording each of the above signals on a video tape is as follows.

1 is a block diagram of a recording unit of a VCR for recording a television signal on videotape. The configuration for recording the audio signal of the television, the configuration for recording the video signal, and the configuration for recording the control signal are divided. The recording apparatus is provided with an audio signal processing unit 1 for receiving an audio signal input from a television or the like and processing the signal into a type of signal suitable for recording on magnetic tape. An audio signal recording unit comprising an additional oscillator 2 and an audio head 3 for recording the audio signal output from the oscillator 2 on magnetic tape; A composite video signal processor 4 for IF amplification and Y / C separation processing of a composite video signal input from a television, etc., and a luminance signal processor for FM modulation and processing the luminance signal output from the composite video signal processor 4 above; 5) and an FM modulator 6, a color signal processor 7 and a low pass converter 8 for performing low-pass conversion on the color signal output from the composite video signal processor 4, and the FM converter 6 above. A video recording unit comprising a mixing unit 9 for mixing the luminance signal output from the low frequency conversion unit 8 and a color signal output from the low pass conversion unit 8, and a video head 10 for recording the video signal mixed in the mixing unit 9; A vertical synchronous signal processing unit 11 for processing a vertical synchronous signal input from a television or the like, a countdown 12 for downgrading the vertical synchronous signal input from the vertical synchronous signal processing unit 11 to 1/2, and And a control recording section composed of a control head 13 for recording a control signal capable of generating various control signals at the time of reproduction of the videotape by means of the countdown 12 signal.

FIG. 2 is a diagram relating to a recording state of a video tape recorded by the recording apparatus of FIG. When the video tape reproduces the audio signal recorded in the longitudinal direction and the recorded video tape at a position corresponding to the video signal recorded in the edge musque manner in the longitudinal direction on the entire tape and the video signal recorded at the upper end of the tape, A control signal recorded in the longitudinal direction of the tape is recorded to generate a control signal capable of performing a convenient function or the like.

Such a recording device allows handling of video tapes on which video and audio signals are recorded, regardless of gender, age, or young age. Therefore, child lock signals are recorded on adult video tapes where contents that are difficult to see by minors or the like are recorded. There is a case.

According to the present invention, when a child lock signal is detected during videotape playback as described above, the screen to be played is muted and a text message for confirming a password is output through an OSD screen. When the lock signal is detected, the timer applies the blue back signal to the chroma IC unit to mute the screen to the blue back, and the timer applies the control signal to the OSD generator to display the text message confirming the password with the receiving tube to confirm the password The present invention provides a method of screen muting and message output upon detection of a child lock signal of a composite television to allow a television to be played back.

1 is a block diagram of a recording apparatus of a general VCR.

2 is a diagram for explaining a recording state of a video tape;

3 is a block diagram of a screen mute and message output device upon detection of a child lock signal of a composite television according to the present invention;

Figure 4a is a waveform diagram defined as a digital code signal of '1' and '0' by changing the duty ratio of the 'T' signal, which is the period of the control pulse, to 1 / 3T and 2 / 3T

4B is a recording state diagram of a synchronization signal, a child lock code and a password recorded in a control recording area of an adult video tape;

5 is a flowchart illustrating a screen mute and a message output method when detecting a child lock signal of a composite television according to the present invention.

* Explanation of symbols for main parts of the drawings

100: tuner circuit section 110: intermediate frequency IC section

120: chroma IC unit 130: color signal driver

140: Winner 150: Timer

160: remote controller 170: VCR Y / C IC unit

180: ciscon 190: CTL processing unit

200: signal reproducing unit 200a: head amplifier IC unit

200b: video head 200c: audio processing IC unit

200d: Audio head 200e: Control amplifier

200f: control head 210: remote controller

Hereinafter will be described in detail with reference to the accompanying drawings for the configuration and operation of the embodiment for achieving the above object of the present invention.

3 is a block diagram of a screen mute and message output device upon detection of a child lock signal of a composite television according to the present invention.

The present invention provides a high frequency amplifying unit for amplifying a high frequency signal, which is a composite video signal received from an antenna, a mixing unit for converting an input signal amplified from the high frequency amplifying unit and a local oscillation frequency from a local oscillating unit to convert to an intermediate frequency and the mixing unit. A tuner circuit section 100 composed of a local oscillation section for supplying a signal for frequency conversion to the apparatus; An intermediate frequency IC unit 110 connected to the tuner circuit unit 100 and amplifying and processing an intermediate frequency signal which is a complex video signal applied from the tuner circuit unit 100; A chroma IC unit 120 connected to the intermediate frequency IC unit 110 and performing color demodulation processing on a composite video signal applied from the intermediate frequency IC unit 110; The color signal driver 130 and the color signal driver 130 which are connected to the chroma IC unit 120 and perform a driving operation to display the RGB output color signal of the chroma IC unit 120 on the water pipe 140. An image tube 140 on which an image signal is displayed;

On the other hand, the remote controller 160 is provided with Arabic numerals for inputting the password through the OSD text screen; The video head 200b, the head amplifier IC unit 200a, the audio head 200d, the audio processing IC unit 200c, and the control head which read and process video signals, audio signals, and control signals during VCR playback of a composite television. A signal reproducing unit 200 comprising a 200f and a control amplifier 200e; VCR Y / C IC which demodulates the video and audio signals applied from the signal reproducing unit 200 into RGB color signals suitable for being displayed by the water pipe 140 and outputs the video and audio signals to the chroma IC unit 120. Unit 170; On the other hand, the control signal of the videotape read from the control head 200f of the signal reproducing unit 200 is detected and output to the CTL detecting unit 190, while controlling the VCR Y / C IC unit 170, that is, the timer ( Sheathcon 180 for controlling the VCR system through the interface with the 150; A timer (150) for controlling the OSD generator (160) for generating OSD characters on a television screen through an interface with the sheath (180); A CTL detection unit (190) for detecting a pulse signal for the child lock signal from a control signal read by the control head (200f) of the signal reproducing unit (200) applied through the sheath cone (180); When a signal is applied from the timer 150 that interfaces with the sheath cone 180, the OSD generator 160 generates an OSD text signal.

Referring to FIG. 3, first, the tuner circuit unit 100 detects and outputs an intermediate frequency from a composite video signal transmitted from a broadcasting station, and uses an intermediate frequency IC that receives the intermediate frequency output from the tuner circuit unit 100 as an input. The unit 110 amplifies the applied intermediate frequency to increase sensitivity and increase selectivity to increase image output. In addition, the image signal output from the intermediate frequency IC unit 110 is input to the chroma IC unit 120 and processed as a signal suitable for displaying a composite video signal on the water pipe 140, and the chroma IC unit ( The RGB color signal processed and output by the color signal 120 is performed to display the RGB color signal from the color signal driver 130 on the water pipe 140.

The above description is a block diagram illustrating a process of displaying a composite video signal transmitted from a broadcasting station in a receiving tube. Hereinafter, a method of outputting a screen mute and a message when detecting a child lock signal of a composite television according to the present invention will be described. The video head 200b, the audio head 200d, and the control head 200f of the time signal reproducing unit 200 read video and audio signals, and the control head 200f controls the control signals recorded in the control track of the video tape. Read Then, the video signal read by the video head 200b is amplified and applied to the VCR Y / C IC unit 170 in order to increase the output characteristics by the head amplifier IC unit 200a, and is supplied by the audio head 200d. The read audio signal is processed into a reproducible voice signal by the audio processing IC unit 200c and applied to the VCR Y / C IC unit 170. Accordingly, the VCR Y / C IC unit 170 that receives the video and audio signals is demodulated into a color signal suitable for being displayed by the water pipe 140 and input to the chroma IC unit 120. On the other hand, the control signal of the control recording area of the video tape read by the control head 200f of the signal reproducing unit 200 is applied to the control amplifying unit 200e and amplified and then amplified by the CTL detection unit (see FIG. If applied to 190, the CTL detection unit 190 detects a synchronization signal, a command signal and a password related to the child lock signal. When the child lock signal is detected by the CTL detector 190, the sheath cone 180 applies a detection signal to the timer 150, and the timer 150 receiving the signal receives the blue back signal to the chroma IC unit 120. By applying the MV 140 to a blueback process, the video image signal being reproduced is muted, and at the same time, an OSD character output signal is applied to the OSD generator 160 to password-receive the blueback processed water pipe 140. Outputs OSD text signal for receiving. When the user inputs a password through the OSD text, if the password is correct, the blowback process is canceled and the videotape is played. If the password is incorrect, the screen is muted until the power is turned off.

5 is a flowchart illustrating a method for recording a child lock signal of a composite television according to the present invention, which will be described in detail below.

First, the flow chart is a step (S10) of switching on the state of the composite television power to play the video tape, and the step of checking the play button input provided to the remote controller 160 in the on-switched state (S20) And, if the play button is selected from the process, the deck playback process for playing the deck with the video tape is inserted (S30), the step of confirming the detection of the child lock signal from the deck playback process (S40), and the child from the process If the lock signal is not detected, the video tape is continuously reproduced to reproduce the video image signal (S50); if the child lock signal is detected, the video mute process (S70); OSD display step (S80) of displaying the OSD text screen for receiving the password input to 140, and the OSD text displayed in the process A password input process (S90) for inputting a password by the screen, a password confirmation process (S100) for checking whether the password inputted from the above is the same as the password recorded on the videotape, and a video mute screen if the password is correct from the above process. If not, it consists of a video mute canceling process (S110) of muting the video signal until the power button is input, and checking the input of the power button (S60).

Referring to the screen mute and the message output method when detecting the child lock signal of the composite television as described above, in the power-on switching process (S10) it is switched on the power of the composite television.

In the play button check process (S20), it is checked whether there is an input from the power button provided in the front of the remote controller 210 and the composite television.

When the user selects the play button from the play button check process in the deck playback process (S30), the video tape inserted in the deck of the VCR included in the composite television is played back.

In the child lock detection process (S40), the control head 200f included in the signal reproducing unit 200 reads the control signal recorded in the control track of the video tape and amplifies the signal in the control amplifying unit 200e. When applied to the CTL detector 190 through the cone 180, the CTL detector 190 detects a child lock signal.

In the video mute process S70, when the CTL detector 190 detects the child lock signal in the process, when the timer 150 interfacing with the ciscon 180 applies the blue back signal to the chroma IC unit 120, The video playback screen is muted by performing a blueback process on the water pipe 140 by a blueback processing function built into the chroma IC unit 120.

The OSD display process (S80) displays the OSD text screen generated by the OSD generator 160 on the blue back screen muted from the above process so that the user can input a password, and the OSD generator 160 It operates by the control signal applied from the timer 150.

In the password input process (S90), a user directly inputs using a numeric key provided on the remote controller 210 using the OSD screen output by the OSD display process (S80).

In addition, the password checking process (S100) compares the password detected by the CTL detection unit 190 with the password input by the user authorized to the ciscon 180 through the timer 150.

That is, in the video mute release process S110, when the passwords match from the password verification process S100, the chroma IC unit 120 is cleared by clearing the blue back signal applied to the chroma IC unit 120 from the timer 150. When the blueback signal sprayed on the water pipe 140 is cut off, the video tape signal is reproduced, and if the password confirmed from the password checking process (S100) is incorrect, the power button input process (S60) is performed. Power button input button input process (S60) is turned off when a signal is applied from the power button provided on the front of the remote controller 210 and the composite television.

As described above, the present invention mutes the video signal when the child lock signal is detected when the child lock signal is recorded using the composite television, and checks the password so that the tape is played only when the password matches. In the case of tape, it protects minors by preventing them from watching.

Claims (4)

In a composite television in which a child lock signal and a synchronous signal are recorded in a control on a track in which a control signal of an adult video tape is recorded, Detecting a child lock recording signal after switching the power on to record the child lock signal and the synchronization signal; When the child lock recording signal is applied by the recording signal detection process, generating a child lock signal and a synchronization signal with respect to the child lock signal; A signal recording process of recording the child lock signal and the synchronization signal generated by the child lock signal and the synchronization signal generation process; A method of recording a child lock signal of a composite television, characterized in that the recording is stopped and the power is switched off when an electrical signal is applied to the stop button and the power-off button from the remote controller (160). The method of claim 1, wherein the generating of the child lock signal and the synchronization signal (S300) comprises: detecting, by the timer 150, an electrical signal corresponding to the child lock recording button from the remote controller 160; Generating and applying another control signal for generating a child lock recording signal and a synchronization signal to the CTL processing unit 190 by the ciscon 180 through an interface with the timer 150; And generating a synchronization signal and a child lock signal in the CTL processing unit (190) receiving the control signal. The digital character '1' according to claim 2, wherein the CTL processing unit 190 converts the 'T' period detected from the videotape control signal into a duty ratio of 1 / 3T as the digital character '1', and sets the '2' for the 'T' period. Converted to a duty ratio of / 3T is defined as a digital character '0', so that the synchronization signal is recorded in the hexa code 'FF', and the child lock signal is recorded in the hexa code 'AA' Child lock signal recording method. 4. The signal recording process S400 of claim 1 or 3, wherein the signal recording process S400 detects the child lock signal and the synchronization signal generated by the CTL processing unit 190 and applies it to the control amplifier 200e. Steps, Amplifying a signal so that a child lock signal and a synchronization signal applied to the control amplifier 200e can be recorded on a control track of a video tape; And recording the amplified child lock signal and the synchronization signal on a control track of a video tape through a control head (200f).