KR0158318B1 - Television receiver equipped with video signal selection output restriction function - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape having a specific screen mark and a television receiver having a selective output restriction function of the playback signal. According to the present invention, an identification signal indicating that a corresponding scene is stored is recorded in a video tape where a particular scene harmful to a child or the like is stored. In the case of a TV, detection means for detecting the identification signal is provided, and control means for forcibly switching the video mode to the TV mode upon detection of the identification signal by the detection means is provided. In addition, selection means for operating the control means is provided, and when the viewer selects a corresponding function, the TV is forced to switch to the TV mode state upon detection of the identification signal by the detection means, which is harmful to children and the like. This will prevent you from watching the scene.

Description

Television receiver with selective output limitation of video signal

1 is a main configuration diagram schematically showing the configuration of a general television receiver.

2 is a block diagram showing the configuration of a television receiver having a selective output restriction function of a video signal according to Embodiment 1 of the present invention.

FIG. 3 is an operation flowchart for clarifying the operation of the apparatus shown in FIG.

* Explanation of symbols for main parts of the drawings

6: Image detector 9: Receiver

19: external AV device 20: switching unit

23: image processing unit 24: mixer

25: CRT drive unit 31: remote control device

32: state storage unit 33: frequency detection unit

34: password storage unit 35: OSD generation unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to video systems and, more particularly, to television receivers having a selective output limitation function of video signals.

In general, a television receiver (hereinafter referred to as a TV) has been developed and manufactured with the focus on receiving and demodulating broadcast signals transmitted from broadcasting stations and outputting them as video and audio signals through CRTs and speakers. As a result, video and audio playback devices such as VCRs (Video Cassette Recorders), laser disk players, and compact disk graphics players have been developed and distributed, allowing users to watch video and audio signals played back from these playback devices on a TV. TVs are gradually being developed to use TV as a composite video output device.

1 is a block diagram schematically showing the configuration of a TV which is to perform such a function.

In the drawing, reference numeral 1 denotes an antenna, 2 denotes an RF amplifier for amplifying a radio frequency (RF) received through the antenna 1, and 3 denotes an RF signal from the RF amplifier 2 and will be described later. A mixer for generating an intermediate frequency signal (IF signal) by mixing the oscillation frequency from the local oscillation circuit 17.

Further, reference numeral 4 denotes an IF amplifier for amplifying the IF signal output to the mixer 3, and 5 denotes an image intermediate frequency signal (PIF) and an audio intermediate from the IF signal output from the IF amplifier (4). P / S separation unit such as surface elasticity and filter for separating the frequency signal (SIF), 6 is an audio detector for detecting an audio signal from the SIF signal, 7 is an image detector for detecting an image signal from the PIF signal to be.

Further, reference numeral 8 denotes a remote control unit for selecting a channel desired by the viewer or performing TV / AV mode switching, etc. 9 denotes a receiving unit for converting an infrared signal from the remote control unit 8 into an electric code signal, 10 Denotes a channel memory in which predetermined channel data is stored, and 11 denotes a control unit for controlling the entire apparatus in accordance with a remote controller signal from the remote controller device 8.

Reference numeral 13 denotes a PWM generator for generating a predetermined Pulse Width Modulation (PWM) signal in accordance with the control signal from the controller 11, and 14 denotes a PWM generator. An integrating circuit that integrates a PWM signal to generate a predetermined level signal. When the viewer selects a predetermined channel using the remote controller 8, the control unit 11 stores channel data corresponding to the channel selected by the viewer in the channel memory. After reading from (10), a predetermined PWM signal is generated by controlling the PWM generator 13 on the basis thereof, wherein the PWM signal is a voltage control signal corresponding to the channel selected by the viewer through the integrating circuit 14. Will be output as

Next, reference numeral 16 denotes an adder for adding a voltage signal applied from the integrating circuit 14 and a voltage signal applied from an AFT (Auto Fine Tunning) circuit 15 to be described later, and 17 denotes a local oscillation circuit. This generates a predetermined frequency signal in accordance with the level of the voltage signal applied through the adder 16 and outputs it to the mixer 3 to execute the broadcast station.

On the other hand, the AFT circuit 15 is also referred to as an automatic fine circuit, which is provided for precise tuning operation.

That is, the local oscillation circuit 17 changes the local oscillation frequency output according to the change of ambient temperature or the passage of time. When the local oscillation frequency is changed in this manner, the intermediate frequency output from the mixer 3 is varied, so that stable image reproduction is impossible.

The AFT circuit 15 is provided to solve the above problem, which outputs a voltage signal (± ΔV) for the variation range Δf of the intermediate frequency to the adder 16 so that the local oscillation circuit 17 It is to stabilize the local oscillation frequency output from

In addition, in the TV, the magnitude of the input signal received through the antenna 1 is changed due to the strength or fluctuation of the received signal, and reference numeral 18 denotes the image signal detected by the image detector 7. AGC (Auto Gain Control) for controlling the video signal output level from the image detector 7 by controlling the amplification degree of the above-described RF amplifier 2 and IF amplifier 4 based on the level. Circuit.

On the other hand, reference numeral 19 denotes an external AV device such as a VCR or a laser disc player, and 20 denotes an audio from the voice detector 6 and the image detector 7 according to the switching signal from the controller 11. A switching unit for selectively outputting video signals and audio and video signals from the external AV device 19.

Although reference numeral 21 is not shown with respect to the audio signal output from the switching unit 20, the base, treble, volume, etc. according to the control signal from the control unit 11 is not shown. A voice processor which executes voice processing, and 22 is a voice amplifier which amplifies the voice signal processed by the voice processor 21 and outputs it to the speaker.

Although reference numeral 23 is not shown with respect to the image signal output from the switching unit 20, the color, tint, and brightness are in accordance with the control signal from the control unit 11. And an R (Red), G (Green), B (Blue) signal corresponding to the video signal, and 24 is an RGB signal output from the image processor 23 and the OSD generation described above. A mixer for mixing and outputting the RGB and OSD blanking signal (Y ') output from the unit 12, 25 is a CRT driving unit for driving the CRT based on the RGB signal output from the mixer 24.

That is, in the above-described TV, when the viewer selects the TV / AV mode using the remote control device 8, the control unit 11 controls the switching unit 20 so that the audio detector 6 and the image detector ( 7) By selectively outputting the video and audio signals from the external AV device 19 and the video and audio signals from the external AV device 19, the viewer can display the video and audio signals from the external AV device 19. The reproduced video and audio can be viewed through the TV's CRT and speakers.

However, in the above-described TV, the AV signal input from an external AV device, especially a VCR, is processed to be output only to a speaker or a CRT, so that watching a videotape with a child may adversely affect the emotion of the child. The scene is output through the CRT.

Thus, in some families, an adult may watch a videotape from beginning to end, and then have the child watch it, but this can be a very cumbersome task, as well as a particular one or two scene that can be a problem. There has also been a problem of not watching.

Accordingly, the present invention has been made in view of the above circumstances, and an object thereof is to provide a video tape and a TV which can limit the output of a particular scene harmful to a child or the like.

A video tape according to the present invention for achieving the above object is characterized in that a predetermined identification signal is recorded in a recording portion of a specific image.

In addition, the TV according to the present invention for realizing the above-mentioned switching is applied from the external AV device and switching switching the TV signal detected from the video signal and the broadcast signal containing a predetermined identification signal for a specific image signal Means for processing a signal selected by said switching means and outputting it to a CRT, said television receiver comprising: first selecting means for selecting a TV / video mode and selecting or releasing a selective output restriction function of a video signal; A second selection means for detecting, a detection means for detecting a predetermined identification signal included in the video signal, and an identification signal when the identification signal is detected by the detection means in a state where output restriction is selected by the second selection means. Control means for forcibly switching the video mode to the TV mode by switching-controlling the switching means during detection of the? Characterized in that configured to include.

According to the present invention having the above-described configuration, an identification signal indicating that the scene has been stored is recorded on the video tape in a portion where a particular scene harmful to a child or the like is stored. In the case of a TV, detection means for detecting the identification signal is provided, and control means for forcibly switching the video mode to the TV mode upon detection of the identification signal by the detection means is provided. Further, selection means for operating the control means is further provided, and when the viewer selects the corresponding function, the TV is forcibly switched to the TV mode state upon detection of the identification signal by the detection means, such that children, etc. It is possible to prevent watching harmful video scenes.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

In the present invention, a specific frequency signal is recorded together in a portion where a specific screen of a video tape, for example, a violent scene or a sensational scene, is recorded. In other words, a specific screen mark corresponding to a specific scene of a video program is provided.

Such recording of a specific mark can be easily performed by using generally known techniques, for example, by inserting a predetermined frequency signal into the color signal of the video signal when recording a video and audio signal on a video tape. You can run it.

Then, the TV side detects whether the above-described predetermined frequency signal is included in the composite video signal applied from the video device to execute the output restriction function of the corresponding screen.

2 is a block diagram showing the main components of the TV according to the present invention to execute the above-described functions. However, the same reference numerals are attached to the same parts as those in FIG. 1 in FIG. 2, and the detailed description thereof is omitted.

In FIG. 2, reference numeral 31 denotes a remote control device having a selection button for the viewer to select an output restriction function of a specific screen according to the present invention, and 32 denotes a storage for storing a selection state by the remote control device 31. As a part, it consists of a nonvolatile memory such as, for example, E2PROM.

Further, reference numeral 33 is a frequency detector for detecting a predetermined frequency signal indicating a specific screen from the composite video signal applied from the external AV device 19 (VCR in this embodiment), and 34 is a predetermined password registered by the viewer. When the viewer selects the video mode using the remote control device 31, the password storage unit 35 displays the function selection state registered in the state storage unit 32 to the viewer, and also inputs the password of the viewer. An OSD generator for outputting OSD pattern data for guiding this, 36 is a control unit for controlling the entire device.

Next, the operation of the apparatus having the above-described configuration will be described with reference to the flowchart shown in FIG.

When the viewer operates the remote control device 31 to select the video mode (step ST1), the control unit 36 switches the switching unit 20 (step ST2) and the state data stored in the state storage unit 32. On the basis of this, it is determined whether the screen output limit function is selected (step ST3).

If the function is not set, the OSD control unit 35 controls the screen output limiting function to be set in the non-set state through the CRT (ST4 step), until the viewer switches to the TV mode. It is checked whether the screen output limit function is set (steps ST5 and ST6).

In addition, the setting of the screen output restriction function is performed by the viewer operating the function setting key of the remote control device 31 once, which is necessary for the viewer to quickly set the corresponding function in the non-setting state of the screen output restriction function. It is to respond to the case. When the screen output restriction function is set in this way, the control unit 36 registers the function setting state in the state storage unit 32 (step ST7).

On the other hand, when the screen output limit function is set or is set in step ST3 or ST5, the controller 36 controls the OSD generator 35 to indicate that the screen output limit function is set (step ST8). The remote controller 31 detects that the detection signal is applied from the frequency detector 33 until the screen output restriction function is released or the mode is switched to the TV mode (steps ST9 to ST11).

When the detection signal is applied from the frequency detector 33 in the frequency detecting step, the switching unit 20 is controlled to switch to the TV mode by combining the image detector 19 and the image processor 23. Bar (ST12 step), this state continues until the detection signal is not applied from the frequency detector 33 (ST13, ST14 step).

On the other hand, in step ST9, the viewer selects the function release using the remote control device 31, the control unit 36 first reads the password from the password storage unit 34 to detect whether the password is registered and then the password If is registered, the OSD control unit 35 controls the password input (step ST15). Of course, in this case, if the password is not registered, the process immediately proceeds to step ST18 to execute the function release operation.

Subsequently, when the viewer inputs a password using the numeric keys of the remote control device 31, the controller 36 checks whether the password input by the viewer matches the password stored in the password storage unit 34 ( ST17 step) If the passwords do not match at this time, the OSD generating unit 35 is controlled to indicate that the passwords do not match (step ST17), and the above-described frequency detection operations of steps ST9 to ST11 are executed. If the passwords match in step ST17, the OSD generation unit 35 is controlled to indicate that the screen output limiting function is released, and the state storage unit 32 is reset, and the process proceeds to step ST5.

When the viewer selects the TV mode in the above-described steps ST5 and ST11, the processing is switched to the TV mode by switching the switching unit 20 to end the processing.

Therefore, according to the above embodiment, when a violent scene or a sensational scene is output while watching a video program, the video mode is automatically switched to the TV mode, so that a video can be watched with confidence even in a home with children. .

In addition, the present invention is not limited to the above embodiments and various modifications can be made without departing from the technical scope of the present invention. For example, in the above embodiments, the frequency detector and the TV / video mode (TV) / RF mode) switching function can achieve the same effect as the present invention even if installed in the VCR.

As described above, according to the present invention, a TV having a playback signal selective output restriction function of a video tape having a specific screen marking function that can restrict output of violent scenes or sensational scenes harmful to children or the like when watching a video device. Can be realized.

Claims (2)

Switching means for switching the TV signal detected from the video signal and the broadcast signal including a predetermined identification signal for a specific image signal, which is applied from an external AV device, and processes the signal selected by the switching means A television receiver configured to output to a CRT, comprising: a first selection means for selecting a TV / video mode, a second selection means for selecting or releasing a selective output restriction function of a video signal, and a predetermined value included in the video signal. Detection means for detecting an identification signal, and if the identification signal is detected by the detection means while the output limiting function is selected by the second selection means, switching the switching means during detection of the identification signal to switch the video mode to the TV mode. A video signal line comprising a control means for forcibly switching to a TV set with output limits. 3. The selective output restriction function of a video signal according to claim 2, further comprising display means for displaying a selection state by said second selection means when the video mode is selected by said first selection means. Equipped TV receiver.