KR950010959B1 - Protecting apparatus method of recodr for vcr - Google Patents

Abstract

The apparatus includes a key inputting part for sending, releasing, and setting a signal onto a tape; a controlling part for outputting a control signal according to the key inputting part; a decoding part for outputting a CTL signal corresponding to the key input according to the control signal; a recoding part for recording the CTL signal on a control track of the tape; and a duty identifying part for identifying the duty ratio of the CTL signal recorded on the control track.

Description

VCR recording protection device and method

1 is a perspective view showing a tape write preventing structure.

2 is a schematic diagram showing a tape attribution device and a tape of the present invention.

3 is a diagram showing an example of duty setting applied to a control signal in FIG.

FIG. 4 is a flow chart showing the attribution process of FIG.

FIG. 5 is a flowchart showing a process of releasing the attribute of FIG. 2. FIG.

6 is a flow chart showing the record protection process of FIG.

FIG. 7 is a flow chart showing the disaster protection process of FIG. 2. FIG.

* Explanation of symbols for main parts of the drawings

1: tape 2: hole

3: safety tab 10: property release key

11: attribute grant key 12: oral cavity setting key

13: key processing unit 14: micom

15: control signal decoding unit 16: head

17: Control signal duty discriminating unit 18: Attribute assignment

19: tape 20: control track

The present invention relates to a functional implementation for the convenience of a VCR (Video Cassette Recorder) user, in particular VCR (VCR) record protection device suitable for safe and efficient protection and concealment of information recorded on the tape And to a method.

1 is a perspective view of a tape showing a conventional write-protection structure, in which a visual groove 2 is formed at one end of a rear portion of the tape 1, and an area of the groove 2 is formed at one side of the groove 2; A smaller rectangular panel is formed on the outer surface of the tape 1 in a planar safety tab 3.

The write-protection function of the tape 1 with the safety tab 3 having such a shape enables the entire recording to be prevented by removing the safety tab 3.

However, since the recording prevention function of the prior art is a mechanical tap, it is possible to record video and audio signals on a tape by filling the groove with foreign matter even if the safety tab 3 is removed. Once removed, there is a problem of inefficient use of the tape because a spare which is not recorded without filling the groove cannot be written on the tape.

The present invention has been made to solve the problems of the prior art, it is possible to prevent the recording and playback of the tape even if the safety tab on the tape is not removed, and to record and play back only two sections by designating a certain section on the tape. Its purpose is to protect and conceal information and make tapes more efficient. An embodiment of the present invention for realizing such an object will be described with reference to the accompanying drawings.

Attribe to be implemented in the present technology is three types, recording method, playback method recording protection + playback prevention.

These three attributes have an effect on the section on the tape set by the user.

2 is a block diagram of a recording and reproducing prevention device for explaining the present invention. An attribute release key 10 for releasing an attribute on a tape, an attribute grant key 11 for assigning an attribute, and an interval setting for setting an interval are shown. Receives and decodes a signal from the key processing unit 13 of the key 12, the microcomputer 14 which processes and outputs a signal input from the key processing unit 13, and the signal of the microcomputer 14 A head 16 for receiving a signal from the control signal decoding unit 15 and the control signal decoding unit 15 and recording the attribute signal in the control track 20 on the tape 19, and a signal from the head 16. The recording protection device 18 is constituted by including a control signal duty discriminating unit 17 which reads out the duty of the control signal and outputs the signal to the microcomputer 14.

The present technology as described above is used to change the duty (duty) of the control signal to give the attribute (Attribe).

3 shows an example of the change of the control signal duty. In the case of the property for preventing the recording, the duty is set to 40% S polarity and 60% S polarity. 70% S-polarity 30%, Anti-play + write-protection assigns N-polarity to 90% S-polarity to 10% to change the rate of duty, making it impossible to record, play, record + play Give an attribute to the prize.

4 is a flow chart illustrating the attribution provisioning process of the present invention. When the attribution granting key (Det) 11 is input, the control signal is decoded, the decoded signal is recorded in the control track on the tape, and the section setting is completed. If the interval setting is completed, the attribute granting process is finished. If the interval setting is not completed, the control signal decoding process is performed again.

However, the attribute granting key is one of recording prevention, reproduction prevention, recording prevention + reproduction prevention. FIG. 5 is a flow chart showing the attribute release process. When an attribute release key is input, the attribute signal search operation is performed, and if the attribute signal exists, the control signal is decoded (returned) after the attribute signal exists. It is checked whether the property signal exists and the property release operation is terminated if the property signal does not exist.

In the above process, if there is no attribute signal after the attribute signal search operation, the attribute signal search operation is performed again. If the attribute signal is present after the control signal decoding, the control signal decoding operation is performed again.

However, the attribute release key (key) is one of three types, such as recording protection, playback prevention, recording prevention + playback ring.

FIG. 6 is a flowchart showing the recording protection process in the section on the tape to which the write protection attribute is given. In the recording mode, if there is a record safety tab, it is checked whether there is a write protection attribute signal. key), and if it is a record release key, the record protection process ends.

In the mode of checking whether there is a recording safety tab during the process, if there is no safety tab, the tape is ejected. If there is no attribute signal in the mode for checking whether there is a write-protection attribute signal, the recording operation is performed.

If the write key is not in the write key check mode, the program is executed again from the mode for checking whether there is a write protection signal.

7 is a flowchart showing a tape playback protection process in a section on a tape to which a playback protection attribute is given. If it is checked whether there is a playback prevention property signal in the playback mode, the playback protection process is performed by checking whether the playback mode release key is checked. If there is no release key, it feeds back to the mode for checking whether there is a play prevention property signal and checks whether there is a play prevention property signal. In the above process, if there is no play prevention property signal, the play operation is performed.

This technology can be applied to audio and video related devices. Therefore, the present invention is to protect the recording for the entire section of the tape only by the safety tab (Tap) on the tape in the prior art, the present technology is to leave the tape without removing the safety tab, the specific section on the tape to set the tape It can be used efficiently. Therefore, having a double safety device ensures that the information recorded on the tape can be reliably stored.

In addition, a conventional lock key has been provided as a conventional information concealment function, which is inefficient in terms of protection for a VCR device, while the present technology provides a user with a simple anti-playback property on a tape section. It has the effect of hiding information.

Claims (9)

Key input unit for assigning, releasing, and setting a kind of attribute signal on the tape Control unit for outputting a control signal for controlling a predetermined unit according to the output of the key input unit Control unit for outputting the corresponding key input according to the control signal output from the control unit Decoding unit for decoding and outputting the CTL signal according to the recording unit for recording the CTL signal output from the decoding unit to the control track of the tape including a CTL signal duty discriminating unit for determining and outputting the duty ratio of the CTL signal based on the control track VCR record protection device characterized in that the configuration. Decoding the control signal having a different duty ratio according to the key type when the attribution grant key is input, Recording the decoded control signal to the control track, Checking whether the section setting is completed, and when the completion of the attribution granting process is finished, Performing the attribute signal search operation according to the key type, if the attribute attribute, granting process, and attribute release key are input, checking whether there is an attribute signal, decoding the control signal if there is an attribute signal, and again. And a property setting process comprising the step of checking whether there is an attribute signal and ending the attribute release operation if there is no attribute signal. The method of claim 2, wherein in the step of checking the completion of the interval setting during the attribute granting process, if the interval setting is not completed, the attribute granting process is performed again from the control signal decoding operation. The method of claim 2, wherein, during the attribute release process, if there is no attribute signal in the attribute signal checking step, the system feeds back to the attribute signal search step, and if there is an attribute signal in the attribute signal checking step, the feedback signal is decoded to the step of decoding the control signal. A record protection method of a VCR, characterized by re-executing the attribute signal release process. The method according to claim 2, wherein in the recording mode, a step of checking whether there is a record safety tab, a check of whether there is a write protection attribute signal if there is a record safety tab, and if a record release key is checked if there is a write protection attribute signal, an operation is performed if it is a record release key. And a step of checking whether there is a play prevention attribute signal in the playback mode, checking whether the play mode release key is applied if there is a play prevention attribute signal, and ending the play protection operation if the release key is released. And a record protection process. The method of claim 2, wherein the attribute signal sets a duty value of the control signal (e.g., 40% anti-reproducing N pole 70% anti-reproducing, 90% non-reproducing + anti-recording N pole 90) to a predetermined value. VCR recording protection method. 6. The method of claim 5, wherein during the record protection process, the tape is ejected if there is no safety tab in the step of checking whether there is a record safety tab, and recording is performed if there is no record protection attribute signal in the step of checking whether there is a write protection signal. And in the step of checking the record release key, if there is no release key, feeds back to the step and executes the program again. 2. The recording protection method of a VCR according to claim 1, wherein said attribution signal is a recording prevention release signal, a reproduction prevention release signal, and a recording / playback prevention release signal. 3. The recording protection method of a VCR according to claim 2, wherein the attribution signal is a recording protection when the duty ratio of the CTL signal is 40%, a reproduction prevention when 70%, and a reproduction / recording prevention when 90%.