JPH0233767A - Reproducing device - Google Patents

Abstract

PURPOSE:To obtain a device to prevent a main signal part, which is not desired to be reproduced, from being reproduced by providing a main signal reproducing means, a mode switching means, a sub signal detecting means, a mode switch control means and a main signal output means. CONSTITUTION:When a magnetic tape 3, to which a sub signal is recorded, contacts a head 10 and the sub signal is reproduced by a rotary head 4, a control circuit 14 switches operation to fast forward and outputs a main signal from a picture memory 16. After that, when the sub signal is not reproduced by the head 10, the control circuit 14 switches the operation to reproducing operation and outputs the main signal from a rotary head cylinder 4. In order to cancel a reproducing cut condition, a prescribed pass-word is inputted after a cancel button is operated. The pass-word is collated with storage by the control circuit 14 and when the pass-word is coincident with the storage, the reproducing operation is restarted. In order to erase the sub signal, an erase button is operated and the contents of a reproducing signal is reproduced and confirmed. Then, the button is pushed again in a desired position and erasing is stopped. Thus, when another person executes reproducing, a part, which is not desired to be observed, is automatically cut without being noticed by anyone and secrecy can be held.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a video cassette tape recorder (hereinafter referred to as VTR).
This relates to playback devices such as

Conventional Technology Conventionally, in VTRs, no matter how private the signal content recorded on the magnetic tape is, if someone else inserts the cassette into the VTR and plays it back, it can be accessed by anyone. However, private contents could be viewed and privacy could not be protected, so when storing the cassette itself, the place where it was stored was locked to protect privacy.

Privacy was also protected by providing a key on the VTR itself or on the cassette itself so that the cassette could not be used unless it was unlocked.

Problems to be Solved by the Invention However, with the above configuration, it is necessary to take the trouble to secure a locked storage location in order to store the cassette.

Furthermore, even if the user himself/herself wants to listen to the cassette, there is the trouble of having to unlock the cassette and take it out. Alternatively, if the key to the cassette storage location is lost, there is a problem in that the cassette cannot be viewed again or the storage location must be destroyed.

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a reproducing apparatus that has a simple configuration and can prevent the reproduction of a main signal portion that is not desired to be reproduced by others.

Means for Solving the Problems In order to solve the above problems, the present invention provides main signal reproducing means for reproducing the main signal on the tape, mode switching means for switching the mode of the device, and detecting the sub signal on the tape. sub signal detection means; control means for controlling the mode switching means to switch the mode of the device when the sub signal detection means detects the sub signal; and control means for controlling the mode switching means to switch the mode of the device when the sub signal detection means detects the sub signal; and main signal output means for outputting a main signal instead of the main signal output means.

Effect of the present invention Due to the above-described structure, there is no need to secure a locked storage location as in the conventional case, and by recording the sub-signal on the tape, the main signal with the content that you do not want others to know is recorded. Even if the cassette is inserted into the playback device and the playback operation is performed, the sub signal detection means detects the sub signal and the mode is switched during playback, and another main signal is outputted by the main signal output means, making it known to others. A main signal with content that you do not want to be output will not be output. In addition, even if a main signal with content that you do not want others to know is recorded at an arbitrary position on the magnetic tape, that part is replaced with another main signal and played back, so the part of the main signal that you do not want others to know is It will never be played.

Embodiment Hereinafter, a reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block system diagram of the basic concept of a playback device that is an embodiment of the present invention, FIG. 2 is a block system diagram of the playback device, FIG. 3 is a plan view of the playback device, and FIG. The figure is a front view showing the front panel of the playback device.

1, 2, and 3, the mechanism section 2 of the VTR body 1 includes a rotating head cylinder 4, which is a main signal reproducing means 20 for recording and reproducing video signals on a magnetic tape 3, and a pinch roller 5. a capstan motor 6 that drives the magnetic tape 3 at a constant speed by pressing the magnetic tape 3 through the magnetic tape 3; a take-up reel 7 for winding the magnetic tape 3 upstream from the capstan motor 6; A supply reel 8 for supplying the magnetic tape 3 to the downstream side of the stun motor 6, a loading means 9 for winding the magnetic tape 3 around the rotary head cylinder 4 at a predetermined angle, and a The head 10 is a sub-signal detecting means 21 for recording, reading, or erasing sub-signals on the tape 3.

Further, as shown in FIG. 4, the front panel of the VTR body 1 is provided with a sub-signal record/erase button 11a for recording and erasing sub-signals.

11b, an operation button 12 for performing VTR functions (recording, playback, fast forward, rewind, search, stop, etc.);
A reproduction cut release button 13 is also provided.

The VTR body 1 also includes a control means 22 that controls the VTR to perform a predetermined operation when the user operates the sub signal record/erase buttons 11a+11b1, the operation buttons 12, or the reproduction cut release button 13. The circuit 14, the image memory 16 which is the main signal output means 23 which outputs the main signal instead of the rotary head cylinder 4 when the head 10 detects the sub signal, and the head 10 detecting the sub signal, A mode switching means 24 is provided which switches the mode of the VTR main body 1 from playback to fast forward, and when the head 10 no longer detects the sub signal, switches the mode of the VTR main body 1 from fast forward to playback again.

The operation will be described below with reference to FIGS. 1, 2, 3, and 4.

First, when a cassette is inserted into the VTR main body 1, the cassette is moved to a predetermined position. User operates button 12
(by using a timer etc.)
When the VTR main body 1 is placed in a recording or regeneration operation state (including when operated by the control circuit 14 built into the R main body 1), the loading means 9 pulls out the magnetic tape 3 in the cassette from inside the cassette half. After that, the magnetic tape 3 is wound around the rotary head cylinder 4 at a predetermined angle, and a magnetic tape running system as shown in FIG. The magnetic tape 3 is thus crimped onto the capstan motor 6, and as the capstan motor 6 rotates, the magnetic tape 3 is fed at a constant speed, and the magnetic tape 3 on the upstream side of the capstan motor 6 is wound up by the take-up reel 7. Then, the rotary head cylinder 4 starts recording signals on the magnetic tape 3, or starts reproducing signals recorded on the magnetic tape 3.

If you do not want others to know the contents of the recording or playback signal at that time, insert the cassette containing the main signal that you do not want to play back into the VTR main body 1 and operate the VTR main body 1 so that it plays back. However, if you want to prevent the VTR main body 1 from entering the playback state, first operate the sub signal recording button 11a. Next, there are operation buttons 12 for operating the VTR body 1, or operation buttons for timer recording provided on the front panel of the VTR, a music selection button for changing the receiving frequency, and a numeric keypad for searching (all shown in the figure). (not shown) to set a password (if a password is not set, simply operate the sub signal recording button Ila again). After that, when the sub signal recording button 11a is operated again, the head 10
starts recording sub-signals on the magnetic tape 3. The password set at this time is recorded on the magnetic tape 3 by a storage means (not shown) provided inside the VTR body 1 or by the head 10 when recording the sub-signal. When the user wants to stop recording the sub-signal, the user operates the irregular signal recording button Ila to stop recording the sub-signal on the magnetic tape 3.

Thereafter, by repeating this operation, sub-signals are recorded on the magnetic tape 3.

In this way, when the cassette on which the sub-signal has been recorded is loaded into the VTR main body 1 and the operation button 12 is operated to cause the VTR main body to play back, the loading means 9 loads the cassette into the P'r magnetic tape. 3 from inside the cassette half, the magnetic tape 3 is wound around the rotary head cylinder 4 at a predetermined angle, and a magnetic tape running system as shown in FIG. As in the case of signal recording, the magnetic tape 3 is fed at a constant speed by rotating the capstan motor 6 and taken up by the take-up reel 7. Then, the rotary head cylinder 4 starts reproducing signals on the magnetic tape 3.

At this time, when the sub signal is reproduced by the head 10,
The control circuit 14 switches the reproduction operation of the VTR body 1 to fast forward. At the same time, instead of the main signal obtained by the rotary head cylinder 4, the main signal recorded in the image memory 16 is output. After that, when the sub signal is no longer reproduced by the head 10, the control circuit 14
The fast forward operation of the TR main body 1 is switched to the playback operation, and at the same time the main signal obtained by the rotary head 4 is output.

Further, if it is desired to cancel the reproduction cut state, the VTR body 1 is temporarily stopped. Thereafter, the VTR body 1 is brought into a reproducing operation state again and the signals recorded on the magnetic tape 3 are reproduced. However, at this time, when the part where the sub signal is recorded on the magnetic tape 3 is played back, the VTR body 1
The fast-forward operation will start, so first operate the playback cut release button 13, and then enter the password you set (if a password has not been set, simply operate the playback cut release button 13 to enter the playback operation state. The control circuit 14 checks the password recorded on the storage means or magnetic tape, and if they match, the VTR starts playing again (if they do not match, the VTR starts playing again).
TR remains stopped).

Finally, when erasing the sub-signal recorded on the magnetic tape 3, the head 11 starts erasing the sub-signal recorded on the magnetic tape 3 by operating the sub-signal erasure button llb. At that time, the signal recorded on the magnetic tape 3 is reproduced by the rotating head cylinder 4, so when the position where you want to stop erasing the sub signal is reached while checking the content of the reproduced signal, erase the sub signal again. When the button 11b is operated, erasing of the sub signal recorded on the magnetic tape 3 is stopped.

In this embodiment, the sub-signal is recorded from the back side of the magnetic tape using a dedicated head, but the method for recording the sub-signal is not limited to this embodiment. It is also possible to record from the surface (for example, in the case of an 8mm VTR, use an empty area or an unused part of the tape, such as recording in the area where cue track signals are recorded).Alternatively, record from the surface of the magnetic tape. (In this case, it is possible to record without affecting the video signal by recording a signal in a higher frequency band than the video signal.)

In addition, in the case of a device that has a control head for recording control signals in the running system, the control pulses recorded by the control head are not recorded with the regular width, but the control pulses are recorded within the range that maintains compatibility. By recording the entire width of the magnetic tape on a magnetic tape for a certain period of time, it becomes a sub signal, or the head on a rotating head cylinder records the sub signal (the sub signal is recorded using the head on a rotating head cylinder) (or record a sub signal by superimposing it on the area where the video signal or audio signal is recorded), or record the sub signal by removing part of the signal band of the recorded signal with a filter etc. However, it is not limited to this embodiment.

Although this embodiment does not describe a specific example of a head for recording, reproducing and erasing sub-signals, for example, by configuring the head to move together with the loading means, sub-signals can be recorded from the back side of the magnetic tape. Alternatively, after the loading means loads the magnetic tape at a predetermined position, the head is attached to some means, for example, a lifting means for raising and lowering the head, and the head is lowered so as to come into contact with the magnetic tape. This configuration may vary depending on the loading method, so it is not limited to this embodiment.

Further, in this embodiment, the storage means for storing the password may be recorded on a solid-state storage element or other magnetic medium, and is not required as a storage medium at all. Further, the storage means for storing the password does not need to be provided within the VTR body, but may be configured so that it can be operated in conjunction with the VTR.

Also, in this embodiment, the password is set when recording the sub signal, but the password can also be set when the cassette is inserted into the VTR, and the password is set when the cassette is inserted into the VTR. is not limited to this embodiment.

In addition, although this embodiment has been explained using a VTR, it is not limited to a VTR, and other devices such as DA'r, IJ-MA, etc. may also be used, and the applied equipment is not limited to this embodiment. .

Further, in this embodiment, a rotary head cylinder is used to record on the magnetic tape, but the recording method is not limited to the rotary head method, but may also be a fixed head method, and is not limited to this embodiment.

Furthermore, although an image memory is used in this embodiment, the method of outputting the signal is not limited to the image memory, and signals from other reproduction means may also be output.

As described above, the main signal reproducing means 20 that reproduces the main signal on the magnetic tape 3, the mode switching means 24 that switches the mode that is the operating mode of the device, and the sub signal detection that detects the sub signal on the magnetic tape 3. means 21 and sub signal detection means 21
When the sub-signal is detected, the control means 22 controls the mode switching means 24 to switch the mode of the device, and the sub-signal detection means 21 detects the sub-signal, so that it outputs the main signal instead of the main signal reproducing means 20. Main signal output means 2
3, there is no need to secure a locked storage place like in the past, and by recording the signals on magnetic tape, it is possible to store cassettes containing the main signal of contents that you do not want others to know. Even if it is attached to a playback device and continuous playback is performed, the main signal from the other main signal output means 23 is played instead of playing the part that you do not want others to know, and during the replacement playback. If someone else is playing the tape by fast-forwarding the tape, they will not notice that the parts they do not want to be seen are cut out and played back, which is effective in maintaining confidentiality.

Effects of the Invention As described above, the main signal reproducing means for reproducing the main signal on the tape, the mode switching means for switching the mode of the apparatus, the sub signal detecting means for detecting the sub signal on the tape, and the sub signal detecting means. control means for controlling the mode switching means to switch the mode of the device when the sub signal is detected by the main signal reproducing means; Since it consists of a signal output means, there is no need to secure a locked storage place as in the past, and by recording the sub-signal on the magnetic tape, it is possible to record signals with contents that you do not want others to know. Even if you insert a cassette into a playback device and start playing, the signal from the other main signal output means is played instead of playing the part that you do not want other people to know, so it is difficult for someone else to play it. In this case, if a part that is not seen is cut, it is automatically cut without being noticed, which is effective for maintaining confidentiality, and can be realized with a relatively simple configuration. Its practical effects are enormous.

[Brief explanation of the drawing]

FIG. 1 is a basic conceptual block system diagram of an embodiment of the playback device of the present invention, FIG. 2 is a block system diagram of an embodiment of the playback device of the present invention, and FIG. 3 is a plan view of the same playback device. , FIG. 4 is a front view of the front panel of the playback device. 4... Rotating head cylinder, 10...
...Head, 14...Control circuit, 16...
...image memory.

Claims (1)

[Claims] a main signal reproducing means for reproducing the main signal on the tape; a mode switching means for switching the mode of the apparatus; a sub-signal detecting means for detecting the sub-signal on the tape; and a sub-signal detecting means detecting the sub-signal. control means for controlling the mode switching means to switch the mode of the apparatus; and main signal output means for outputting a main signal in place of the main signal reproducing means when the sub signal detection means detects a sub signal. A playback device comprising: