KR20000034593A - Method for record and playback by using password in tvcr - Google Patents

Abstract

PURPOSE: A method for record and playback by using password in TVCR is provided so that children or juveniles can not play back a video cassette tape, in which adult broadcasting programs are recorded, thoughtlessly by writing specific codes on control tracks of a section, which is restrained form being watched, periodically using control signals and VISS(VHS Index Search System) signals which have different duty ratio when recording programs, which children or juveniles are restrained from watching, and by requesting a password at a section, in which the specific code is detected, on playback and by playing back only if an inputted secret number is identical to a preestablished password and by skipping a section in which the specific code is written if the inputted password is not identical to the preestablished password. CONSTITUTION: In a TVCR which has combined functions of TV and VCR, if mode is turned to record mode, broadcasting signal which received through a tuner is recorded in a video cassette tape.(300,302) If a key for restraining watch is inputted, a specific code, which is made by combining a normal control signal and VISS signal which has a different duty ratio from the control signal, is recorded on a control track and broadcasting signal received through the tuner is recorded continuously.(304,306,308) If mode is turned to playback mode, signals recorded in the video cassette tape are read detecting the specific code recorded on the control track according to signals permitted from a control head.(400,402,404) If the specific code is detected, playback mode stops temporarily and OSD character screen for receiving input of password is displayed.(406,408) If the inputted password is identical to the preestablished secret number, the tape is played back continuously.(410,414,420) If the inputted password is not identical to the preestablished password or the password is not inputted during a prescribed time, output of image and sound signal is muted and the tape is searched forward in high speed and playback is executed from a section in which detection of the specific code is over.(412,416,418,420)

Description

Method for recording and playing back in a TVCR

The present invention relates to a recording and reproducing method of a TVCR, and more particularly, in a TVCR having a combined function of a television and a video cassette recorder, if the broadcast program is an adult-only program that is harmful to children or teenagers to watch. The present invention relates to a recording and reproducing method using a password in a TVCR, in which a specific code is periodically inserted into a video cassette tape, and when this section is played back, a password is required to selectively play or skip.

In general, a television separately detects and demodulates and amplifies an airwave broadcasting signal of a predetermined channel received through a tuner into a video signal and an audio signal, displays a video signal through a water pipe (CRT), and outputs an audio signal through a speaker. It is a device that can output and watch television broadcast programs.

Meanwhile, a video casette recorder separates a broadcast signal received from a tuner into a video and audio signal, records the video signal on a video cassette tape using a video head and an audio head, respectively, and records the recorded video and audio signals. It is a device that can reproduce and output by using the head and the audio head.

On the other hand, the above-described television and video cassette recorder are typically provided together so that the viewer can output the video tape signal including the video and audio signals reproduced in the video cassette recorder through the television's receiving tube and speaker, You can play movies and educational programs recorded on the TV.

However, the above-mentioned two electronic products are integrally used in their characteristics, and therefore, a user's point of view is convenient, and a TVCR has been developed as a combination product having these two functions. At the same time, the broadcast signals received at the same time can be recorded on the video cassette tape, and the deck can be controlled to watch the video and audio signals reproduced by the video cassette recorder.

On the other hand, in TV, its functions are diversified to meet the needs of viewers, and various functions are added to satisfy the various needs of these viewers.

For example, in a broadcasting system providing an extended data service (EDS), data for broadcast programs and scheduled recording on a broadcast signal, for example, a channel, a broadcast category (eg, news, drama, sports, etc.), a broadcast start / VB (Vertical Vertical Blanking Interval) by converting various program information such as end time, standard time data, and adult broadcasting code to indicate that the broadcast requires the restriction of children or adolescents into digital signals. By inserting and transmitting on an arbitrary horizontal line, this signal is decoded by the KBPS decoder on the video receiving device side to perform broadcast program reservation recording function and automatic time correction function.

In addition, as a broadcasting system for providing such an EDS, there are, for example, Korea Broadcasting Program System (KBPS) in Korea, VPS (Video Programming System) in Germany, and PDC (Program Delivery Control) in the UK.

Therefore, conventionally, reservation recording is performed by using the reservation recording data included in the EDS data of the broadcasting system providing the above-described EDS, or the user directly inputs the information for the reservation recording so that the user can enter even when the user is absent. The reservation recording was performed based on the reservation recording information, and the function of displaying the adult broadcasting based on the adult broadcasting code included in the EDS data was performed.

On the other hand, the control signal in the video cassette recorder is recorded at the bottom of the video tape, i.e., the control track, and recorded and detected by the control head as a bipolar pulse of frequency 30 Hz.

When recording, the control signal divides the vertical sync signal of the video signal into 1/2, and then records it on the control track. During playback, the control signal is detected and compared with the reference signal 30 Hz to phase the Capstan Motor. It is supposed to be controlled.

That is, during recording, the control signal in the form of a square wave extracted from the vertical synchronizing signal is accurately recorded on the video tape once per cylinder rotation, that is, once every 1/30 second, and the control recorded by the control head during playback. The signal is read to control the timing of the capstan motor and rotating head cylinder that drives the videotape.

On the other hand, the VHS (VHS Index Search System) signal used for recording is a VHS Uniform Index (INDEX) signal. In other words, when recording as a bis signal, about 62 bis pulses having a high level and a low level ratio of about 3 to 7 are recorded, and the normal control described above with a high level and a low level ratio of about 7 to 3 behind the bis signal. The pulse is recorded.

FIG. 2 is a waveform diagram showing a control signal (pulse) and a bis signal (pulse) used in the present invention. As shown in the figure, a general control pulse has a high level section of 60 ± 5%. The pulse is divided into data "0" and data "1" because the high level section occupies 27.5 ± 2.5%.

According to the present invention, a specific code is set as a password by using a vis signal and a control signal having different duty, and a control code is set to a specific code set in a section in which a child or adolescent needs to be restricted among signals to be recorded on a video cassette tape. By recording on the control tracks of video cassette tapes, children and adolescents are indiscriminately seeking to play and watch adult recording tapes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to record a parental control program of a child or adolescent on a video cassette tape in a recording mode in a TVCR equipped with a television function and a video cassette recorder function. By using a control signal and a vis signal of varying duty ratios, a specific code is periodically recorded and recorded on a control track of a section to which viewing is to be restricted, and during playback, the section in which the specific code is detected requires a password and inputs a secret. Playback is performed only when the number and preset password match, and when the password is not entered or does not match, the recording using the password on the TVCR to skip and play the video tape section recorded with the specific code It is to provide a reproduction method.

1 is a block diagram of a TVCR employed in accordance with the present invention.

2 is a waveform diagram of one period for a control signal and a bis signal used in accordance with the present invention;

3A is a flowchart illustrating a recording process in a TVCR according to a preferred embodiment of the present invention.

3B is a flowchart illustrating a playback process in a TVCR according to a preferred embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

10: key input unit 20: microcomputer

30: tuner 40: video and audio signal processing unit

50: switch unit 60: monitor

70: speaker 80: recording signal processing unit

90 deck portion 100 reproduction signal processing unit

The recording and reproducing method using a password in a TVCR according to the present invention is a method for selectively reproducing an adult program in a TVCR having a television and video cassette recorder function. Recording the broadcast signal received from the tuner on the video cassette tape by controlling the deck and controlling the deck; and if there is a predetermined key input for viewing restriction, the deck's control head is a normal control signal and a vis signal having a different duty ratio from the control signal. And recording the broadcast signal received from the tuner while recording a specific code on the control track, and recording a normal control signal on the control track instead of the specific code when a predetermined key input for viewing restriction is applied again. Recording, including the step of continuing recording Tablets; Reading a signal recorded on a video cassette tape while the deck is driven to detect whether or not the specific code is recorded in a control track based on a signal applied from a control head, and detecting the specific code. When the playback mode is paused, displaying the OSD text screen for receiving the password. If the input password matches the preset password, the system switches to the playback mode and continues playback. And reproducing from a section where the detection of the specific code is terminated by performing a fast forward search while muting the output of the video and audio signals if the password does not match the preset password or there is no input of the password for a predetermined time. Characterized in that consisting of.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

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

1 is a block diagram of a TVCR employed in accordance with the present invention, which includes a key input unit 10, a microcomputer 20, a tuner unit 30, a video and audio signal processing unit 40, a switch unit 50, a monitor ( 60, a speaker 70, a recording signal processing unit 80, a deck unit 90, and a reproduction signal processing unit 100.

In this configuration, the key input unit 10 is an input means for performing the operation of the TVCR, and is provided with various keys including a recording key, a playback key, a viewing restriction key, etc. for performing the operation of the TVCR, and the user's key. Outputs a key signal corresponding to the operation, typically using a remote control for the user to conveniently enter the remote location, and transmits a key signal corresponding to a predetermined key provided on the remote control mounted on the infrared carrier, and provided to the main body The IR (infrared) receiver receives an infrared signal applied from a remote controller, amplifies and detects it, and applies the detected key signal to a microcomputer 20 which will be described later.

The microcomputer 20 controls the overall operation of the TVCR based on the key signal from the key input unit 10. When the key signal for recording is applied from the key input unit 10, the microcomputer 20 switches to the recording mode and the tuner unit 30 Control the deck unit 90 to record the received broadcast signal on the video cassette tape loaded in the deck unit 90, and when a predetermined key signal for viewing restriction is applied from the key input unit 10, A specific code is generated by a combination of a normal control signal and a vis signal having different control signals and duty ratios, and is periodically applied to the control head of the deck unit 90 to continuously perform a recording mode. When the predetermined key signal is re-applied, the recording mode is again performed using the normal control signal.

In addition, when a predetermined key signal for reproduction is applied from the key input unit 10, the microcomputer 20 switches to the reproduction mode and controls the deck unit 90 and the switch unit 50 to record the image recorded on the video cassette tape and The audio signal is reproduced and controlled to be output to the monitor 60 and the speaker 70. When the control signal applied from the control head of the deck unit 100 is determined as the specific code, the deck unit 100 is controlled to record the recording mode. Control and display the predetermined OSD screen for receiving a password on the monitor 60 by controlling the video and audio signal processing unit 40 and a predetermined key signal applied from the key input unit 10. If the password entered in accordance with the preset password matches the password stored in the memory not shown, the deck unit 90 continues to control the playback mode and the password does not match. If no beacon number is input for a predetermined time, the deck unit 90 is controlled to search forward the video cassette tape in the fast forward search mode to skip playback in the section in which the specific code is detected.

Meanwhile, the tuner unit 30 outputs a broadcast signal received by being tuned to a channel corresponding to the control of the microcomputer 20.

In addition, the video and audio signal processing unit 40 separately detects and demodulates and amplifies the broadcast signal received from the tuner unit 30 into an image and audio signal under the control of the microcomputer, and the processed video signal is switched. Through the 50, the monitor 60 outputs the processed audio signal to the speaker 70 through the switch unit 50.

The recording signal processor 80 processes the broadcast signal received from the tuner 30 into a recordable video signal and an audio signal and outputs the same to the deck unit 90 to be described later.

The deck unit 90 also includes a capstan motor for rotating the video cassette tape, a drum mode for rotating the drum provided with the video head, and a deck mechanism for loading and unloading the audio head, the video head, and the video cassette tape. And a servo control means, wherein the video and audio signals from the video signal processing unit 80 are recorded on the video cassette tape or recorded on the video cassette tape under the control of the microcomputer 20. The reproduced video and audio signals are reproduced using the video head and the audio head, and the reproduced video and audio signals are output to the reproduced signal processing unit 100 to be described later.

Meanwhile, the reproduction signal processor 100 processes the reproduced video and audio signals applied from the deck unit 90 and applies them to the switch unit 50.

Next, a description will be given in detail with reference to FIGS. 3A and 3B to which a recording and reproducing process using a password according to a preferred embodiment of the present invention in a TVCR employed in accordance with the present invention having the above-described configuration.

First, Figure 3a is a recording process according to a preferred embodiment of the present invention, the microcomputer 20 determines whether a predetermined key signal for recording from the key input unit 10 is applied (step 300).

At this time, if a predetermined key signal for recording is applied from the key input unit 10, the microcomputer 20 controls the deck unit 90 to proceed to the recording mode (step 302).

Next, the microcomputer 20 determines whether a predetermined key signal for viewing restriction is applied from the key input unit 10 (step 304).

At this time, when a predetermined key signal for viewing restriction is applied from the key input unit 10, the microcomputer 20 does not record the normal control signal to the control head of the deck unit 90, but rather the control signal and the control signal and the duty. The combination of the different bis signals with different ratios, i.e., a specific code is applied periodically to continue the recording mode while controlling the video tape to periodically record the specific code in the control track (step 306).

Next, it is determined from the key input unit 10 whether a predetermined key signal for viewing restriction is reapplied (step 308), and if the predetermined key signal for viewing restriction is not reapplied, the microcomputer 20 performs the above-described steps. Proceeding to 306, the recording mode is performed while periodically inserting a specific code into the control track of the video cassette tape.

On the contrary, if a predetermined key signal for viewing restriction is reapplied in the above-described step 308, the microcomputer 20 returns to the above-described step 302 to control the deck unit 90 to record in the normal control signal. Will continue.

On the other hand, if the predetermined key signal for viewing restriction is not applied in step 304 described above, it is determined whether the predetermined key signal for ending recording is applied (step 310), and the key signal for ending recording is inputted to the key input unit 10. If the microcomputer 20 is applied from the control unit, the microcomputer 20 controls the deck unit 90 to end the recording mode (step 312).

Meanwhile, a process of playing a video cassette tape having a specific code inserted therein for limiting viewing of children or adolescents through the above-described recording process will be described with reference to the flowchart of FIG. 3B.

First, it is determined whether a predetermined key signal for reproduction is applied from the key input unit 10 (step 400).

At this time, when a predetermined key signal for reproduction is applied, the microcomputer 20 controls the deck unit 90 and the switch unit 50 to record the video and audio signals recorded on the video cassette tape loaded on the deck unit 90. The process is performed by reading and reproducing (step 402).

Next, the microcomputer 20 determines whether a specific combination of the above-described specific code, that is, a normal control signal and a vis signal, is detected among the control signals applied from the control head of the deck unit 90 (step 404).

At this time, when a specific code, which is a predetermined combination of the control signal and the vis signal, is detected, the microcomputer 20 controls the deck unit 90 to pause the playback mode (step 406).

Next, the microcomputer 20 controls the image and audio signal processor 40 to display and control the OSD text screen for receiving a password through the OSD function (step 408).

At this time, adults or parents who know the password can enter the password, children or teenagers who do not know the password will not be able to enter the password.

Therefore, the microcomputer 20 determines whether a key signal is applied from the key input unit 10 (step 410). If the key signal is not applied, the microcomputer 20 determines whether a predetermined time has elapsed (step 412), and the predetermined time has elapsed. If not, the process proceeds to step 410 again to determine whether a key signal is applied from the key input unit 10.

On the other hand, if a predetermined key signal, i.e., a password, is applied from the key input unit 10 before a predetermined time elapses, it is determined whether or not the password matches the password stored in a previously set memory (not shown). Step 414).

At this time, if the authorized password matches the preset password, the deck unit 90 temporarily stopped is continuously driven to play the adult broadcast program recorded on the video cassette tape (step 420).

On the contrary, if a password is not applied from the key input unit 10 even after a predetermined time has elapsed, or if the authorized password does not match the preset password, the microcomputer 20 controls the video and audio signal processing unit 40 to generate noise. In order to prevent output, the sound is muted and the deck unit 90 is controlled to switch to the fast forward search mode (step 416), and the control signal read and applied from the control head is continuously detected while the specific code is not detected. When the adult broadcast program skips the section of the recorded video cassette tape, if a normal control signal is applied from the control head, that is, if a specific code is not detected (step 418), the microcomputer 20 ) Proceeds to step 220 described above to control the deck unit 90 again to perform normal playback.

As a result, during recording, a specific code is periodically recorded on a control track of a video cassette tape that the user wants to restrict, and during playback, a section in which a specific code is detected in the control track can be selectively played back or skipped through a password matching process. To make it possible.

Therefore, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, when a viewer records a broadcast program for restricting the viewing of children or adolescents, a video cassette tape combines a normal control signal with a control signal and a vis signal having a different duty ratio and a specific code to control tracks. Records periodically, and if this particular code is detected during playback, it can be selectively played back or skipped through a password matching process, making it impossible for children or teenagers to indiscriminately play back video cassette tapes recorded with adult broadcast programs. It works.

Claims (1)

A method for selectively playing adult programs in a TVCR having a television and video cassette recorder function, Processing the broadcast signal received from the tuner when the recording mode is switched, controlling the deck to record the broadcast signal received from the tuner on the video cassette tape; If there is a predetermined key input for parental control, the control head of the deck combines the normal control signal and the vis signal with different control signals and duty ratios to record a specific code in the control track while continuing to record the broadcast signal received from the tuner; , A recording process including continuing normal recording while recording a normal control signal on a control track instead of the specific code when a predetermined key input for viewing restriction is applied again; Driving a deck to switch to playback mode to read out a signal recorded on a video cassette tape while detecting whether the specific code is recorded in a control track based on a signal applied from a control head; If the specific code is detected, pausing a playback mode and displaying an OSD text screen for receiving a password number; If the entered password matches the preset password, the unit switches to the playback mode and continues playback.If the input password does not match the preset password or there is no input of the password for a predetermined time, the video and audio signals A recording and reproducing method using a password in a TVCR comprising a reproducing process comprising a step of fast forward searching while muting an output to perform reproducing from a section where the detection of the specific code ends.