JPS63261561A - Program searching system for unrecorded part - Google Patents

Abstract

PURPOSE:To quickly and surely search the head of an unrecorded part by deciding the presence or absence of reproduction of a control signal as well as a program searching command for the unrecorded part and topping the drive of a magnetic tape as soon as the reproduction is through with the control signal. CONSTITUTION:A program searching command and the presence or absence of reproduction of the control signal received from a magnetic tape are detected. Driving the magnetic tape is stopped as soon as the reproduction of the control signal is through. Both the control and video signals are recorded on the magnetic tape. Thus the control signal is not recorded at an unrecorded part and therefore a time point when no control signal is reproduced any more shows the head of the unrecorded part. Then the program searching is performed for the unrecorded part by stopping the drive of the magnetic tape at said time point showing the head of the unrecorded part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a magnetic recording and reproducing device that is suitable for use in a magnetic recording and reproducing device such as a magnetic recording and reproducing device integrated with a video camera (hereinafter referred to as a camera-integrated VTR). Concerning recording section cueing method.

[Conventional technology]

Conventionally, when recording multiple programs on a magnetic tape, a cue signal is recorded at the beginning of each program, and the cue signal is detected during playback to automatically cue the desired program. A magnetic recording/reproducing device is known (for example, Japanese Patent Application Laid-Open No. 171062/1983).

On the other hand, there may be cases where it is desired to record a new program following the already recorded programs on the magnetic tape on which some programs have already been recorded.

[Problem that the invention seeks to solve]

However, when recording a new program in this way, it is necessary to find the end of the already recorded program, that is, the starting position of the unrecorded portion. Conventionally, locating the beginning of this unrecorded area was carried out manually by performing normal playback or search playback and stopping the magnetic tape when a reproduced image could no longer be obtained, but this was extremely troublesome. In addition, there was a problem in that it took a long time to cue.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an unrecorded section cueing method that solves this problem and allows the beginning of an unrecorded section to be found quickly and reliably.

[Means for solving problems]

In order to achieve the above object, the present invention detects whether or not a control signal is being reproduced from a magnetic tape together with a cue command, and stops the magnetic tape when the reproduction of the control signal ends.

[Effect]

Control signals are recorded on the magnetic tape along with video signals. For this reason, no control signal is recorded in the unrecorded portion. Therefore, the point at which the control signal is no longer reproduced is the beginning of the unrecorded section, and by stopping the magnetic tape at this point, the unrecorded section is located at the beginning.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the unrecorded section cueing method according to the present invention, in which 1 is a magnetic tape, 2 is a control head, 3 is an amplifier, 4 is a %-)'91 switch, 5 6 is a reel motor, and 7 is a cue setting switch.

This embodiment is a camera-integrated VTR.

In the figure, a mode changeover switch 4 and a cue setting switch 7 are provided on the video camera side, and a system microcomputer 5 controls various operations of the l/TR.

Now, when a tape cassette (not shown) is inserted while the mode changeover switch 4 is in the camera mode side, the system microcomputer 5 puts the tape 1 in a loading state and sets it in a recording pause state.

If you operate the video camera in this state, recording will begin. Furthermore, when the mode selector switch 4 is set to the VTR mode side and a tape cassette is loaded, the tape 1 is in the unloading state, and the system microcomputer 5 selects the tape 1 according to operations such as playback, fast forwarding, and rewinding. Run with loading or half rope ink state.

On the other hand, the cue setting switch 7 is connected to the mode selector switch 4.
However, when it is in the camera mode, it is operated by Step 9, and the tape 1 is put into a half-rope ink state and the tape is moved in fast forward mode. In the half-rope ink condition, the rotating video head (not shown) does not scan the tape 1, but the control head 2 scans the tape 1 and reproduces the control signal in the area where the video signal is recorded. This control signal is amplified by an amplifier 5 and supplied to a system microcomputer 5. While receiving this control signal, the system microcomputer 5 rotates the reel motor 6 to fast-forward the tape 1, but when the control signal is no longer reproduced, it detects this and stops the reel motor 6. Since no video signal is recorded in the area of the tape 1 where no control signal is recorded, when the reel motor 6 stops and zone 1 stops as described above, this becomes the beginning of the unrecorded section.

FIG. 2 is a flowchart showing the above operation of the system microcomputer 5.

In the same figure, the power is turned on and one tape cassette is
When eM is performed (step 101), it is determined whether the mode selector switch 4 is set to the camera mode or the V'l'R mode (step 102). When in the VTR mode, the VTR is operated according to the input from the operating section (step 105), but when in the camera mode, it is determined whether or not the cue setting switch 7 is on (step 104). .

When the cue setting switch 7 is off, no cue command is issued, and at this time, the tape 1 is loaded and placed in a recording pause state, and the camera performs operations in accordance with operations on the camera side (step 105).

When the cueing setting switch 7 is on, it means that a cueing command has been issued, and the tape 1 is thereby immediately brought into a half-rope ink state, and the reel motor 6 is rotated to rapidly advance the tape by 1 ft (step 106). When the control signal is thereby reproduced (step 10
7), the tape 11 is maintained in a fast forward state, but when the control signal is no longer reproduced, the reel motor 1 is immediately turned off.
08yk is stopped (step 108), tape 1 is loaded and set to recording pause (step 1).
09).

Thereafter, when a recording operation is performed on the camera side, recording starts (step 105).

Although one embodiment of the present invention has been described above, the present invention is not applicable only to camera-integrated VTRs, but also to other VTRs.
Needless to say, it is also applicable to

〔Effect of the invention〕

As described above, according to the present invention, the unrecorded portion on the tape can be quickly and reliably located, and the leading end of the unrecorded portion can be accurately found without the user's effort.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the unrecorded section cueing method according to the present invention, and FIG. 2 is a flow chart showing the operation of the system microcomputer in FIG. 1... Tape, 2... Control head, 4... Mode selection switch, 5...
... System microcomputer, 6 ... Reel motor, 7 ... Cue setting switch. □-t

Claims (1)

[Claims] 1. When recording a video signal, in a magnetic recording/reproducing device in which a control signal is also recorded on the magnetic tape at the same time, it is determined whether or not the control signal is to be reproduced along with an unrecorded section cue command, and when the reproduction of the control signal is finished, An unrecorded section cueing method that stops the magnetic tape.