JPH05325318A - Video tape recorder - Google Patents

Abstract

PURPOSE:To quickly and accurately rewind a tape to the starting position of a recorded part which is canceled at the time of performing operation for cancelling video recording regardless of the length of the recorded part. CONSTITUTION:A video recording key 19 and a video recording cancelling key 20 are connected to a system controller 7. An FG pulse is supplied from a capstan FG 18 to the counter of the controller 7 and the traveling amount of the tape in the recorded part just before (cancelling amount at the time of performing the operation for cancelling the video recording) is measured. When the key 20 is operated to be on in a video recording state or a video recording pause state, the magnetic tape 10 is rewound to the starting position of there corded part where a picture is recorded just before operating the key 20 (position showing that a counted value is '0 second'). When the cancelling amount is one or more minutes, fifteen-multiple speed is set at a part before last ten seconds, and triple speed is set at the part of last ten seconds. On the other hand, when the cancelling amount is below one minute, the triple speed is set through all the parts. In order to control the speed of the tape, the rotating speed of a motor 16 is controlled by the controller 7. In the case of setting triple speed, a reproduced picture is displayed on an EVF 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video tape recorder which automatically rewinds a tape to the start position of the recorded portion in order to cancel the recorded portion recorded immediately before.

[0002]

2. Description of the Related Art For example, in a camera-integrated VTR,
When the recording cancel operation is performed in order to cancel the recording portion recorded immediately before on the tape, it is possible to automatically rewind the tape to the start position of the recording portion to be canceled.

[0003]

In this case, when the tape speed for rewinding is low, if the recording portion to be canceled becomes long, it takes a lot of time for rewinding and the probability of missing a recording opportunity increases. On the other hand, when the rewinding tape speed is high, deceleration cannot be done in time if the recording portion to be canceled becomes short, and it becomes impossible to accurately rewind to the tape position before recording.

In view of this, the present invention provides a video tape recorder which, when a recording cancel operation is performed, can quickly and accurately rewind to the starting position of the recording portion to be canceled regardless of the length of the recording portion to be canceled. It is a thing.

[0005]

According to the present invention, when a recording cancel operation is performed, the tape is automatically rewound to the start position of the recording portion in order to cancel the recording portion recorded immediately before on the tape. In such a video tape recorder, the rewinding tape speed is changed according to the amount of the recording portion to be canceled.

For example, when the recording portion to be canceled is smaller than a predetermined amount, the rewinding tape speed is set low.
On the other hand, when the recording portion to be canceled is equal to or larger than the predetermined amount, the rewinding tape speed is set to be low at the last predetermined portion and high at the previous portion.

[0007]

When the recording portion to be canceled becomes shorter, the tape speed is reduced and the tape is rewound, so that it is possible to accurately rewind to the start position of the recording portion to be canceled. Further, if the recording portion to be canceled becomes long, for example, the tape speed becomes high before the last predetermined portion and the tape is rewound, so that it becomes possible to quickly return to the tape position before recording, and the tape speed becomes faster at the last predetermined portion. Since the rewinding is performed at a low speed, the rewinding can be accurately performed to the start position of the recording portion to be canceled.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. This example is an example applied to a camera-integrated VTR.

In FIG. 1, image light from a subject (not shown) is supplied to a CCD solid state image pickup device 2 via an image pickup lens 1. The image pickup signal output from the image pickup element 2 is supplied to the camera signal processing circuit 3. And this processing circuit 3
The video signal output from the electronic viewfinder 6 is led to the output terminal 4 and also via the connection switch 5.
Is supplied to. On / off of the connection switch 5 is controlled by a system controller (hereinafter referred to as “syscon”) 7.

Reference numeral 8 is a tape guide drum, on which the magnetic tape 10 has a predetermined angular range, for example, 18
Wrapped diagonally with an angular range of 0 °. Also, 9
A and 9B are rotary magnetic heads arranged facing each other with an angular interval of approximately 180 °, and are rotationally controlled at a predetermined rotational speed, for example, 30 rotations / second. The magnetic tape 10 is made to run at a predetermined speed according to the rotation of the capstan 11.

The video signal output from the camera signal processing circuit 3 is supplied to the recording signal processing circuit 12. The operation of the processing circuit 12 is controlled by the syscon 7. In the recording state, the recording video signal output from the processing circuit 12 passes through the recording amplifier 13 and the magnetic heads 9A and 9B.
And is recorded on the magnetic tape 10.

Also, the magnetic head 9
The video signals reproduced by A and 9B are supplied to the reproduction signal processing circuit 15 via the reproduction amplifier 14. The operation of the processing circuit 15 is controlled by the syscon 7. The video signal output from the processing circuit 15 is the viewfinder 6
And is led to the output terminal 4 via the connection switch 5.

Reference numeral 16 is a capstan motor. This motor 16 is driven by a drive circuit 17 under the control of the syscon 7.
It is driven to rotate by. Also, 18 is a capstan 1
It is a frequency generator (capstan FG) that generates an FG pulse corresponding to one rotation. The FG pulse (frequency signal) output from the frequency generator 18 is supplied to a counter provided in the syscon 7 as a count clock. The tape running amount (time) is measured by this counter.

Reference numeral 19 is a recording key, and 20 is a recording cancel key, which are connected to the syscon 7. Each time the recording key 19 is turned on, the system is alternately set to the recording (REC) state and the recording pause (RECP) state. The counter of the syscon 7 described above is set to "0 second" when the recording key 19 is turned on in the recording pause state to enter the recording state.

Further, when the recording cancel key 20 is turned on in the recording state and the recording pause state, in order to cancel the recording portion recorded on the magnetic tape 10 immediately before that, the recording position is automatically set to the start position of the recording portion. Then, the magnetic tape 10 is rewound.

FIG. 2 shows the recording cancel key 2 in the recording state.
The outline of the operation when 0 is turned on is shown. That is, when the recording cancel key 20 is turned on in the recording state, the recording state is rewound. At this time, the counter of the syscon 7 is counted down, and when the count value becomes "0 second", the rewinding is stopped and the rewinding state is changed to the recording pause state.

FIG. 3 shows an outline of the operation when the recording cancel key 20 is turned on in the recording pause state.
That is, when the recording cancel key 20 is turned on in the recording state, the recording pause state is changed to the rewinding state. At this time, the counter of Syscon 7 is counted down,
When the count value reaches "0 second", the rewinding is stopped and the rewinding state is changed to the recording pause state.

In this case, the rewinding tape speed is determined according to the tape running amount of the recording portion to be canceled (the count value when the recording cancel key 20 is turned on). That is, when the tape running amount (canceling amount) of the recording portion to be canceled is 1 minute or more, the portion before the last 10 seconds is set to 15 times speed, and the portion for the last 10 seconds is set to 3 times speed. .. On the other hand, when the amount of cancellation is less than 1 minute, the speed is tripled throughout the entire portion. Such tape speed control is performed by controlling the rotation speed of the motor 16 by the syscon 7.

When the tape is rewound at the triple speed, the reproduction signal processing circuit 15 is activated and the connection switch 5 is turned off to display the reproduction image on the viewfinder 6. .. Note that when rewinding is performed at a tape speed of 15 times, the reproduced image is not displayed on the viewfinder 6 and the picked-up image remains displayed.

Next, using the flowchart of FIG.
The recording cancel operation in the system controller 7 will be described in detail.

First, it is determined whether or not the recording cancel key 20 is turned on (step 31), and when the recording cancel key 20 is turned on, it is determined whether the recording state or the recording pause state is set. (Step 32).

In step 32, when the recording state or the recording pause state is set, the count value of the counter is "1 minute".
It is determined whether or not the above (step 33). This count value indicates the tape running amount of the recording portion recorded immediately before on the magnetic tape 10 as described above, that is, the cancel amount.

When the count value is not "1 minute" or more in step 33, the tape speed is set to triple speed (step 34) and the rewinding of the magnetic tape 10 is started (step 35). Then, the reproduction signal processing circuit 15 is operated, the connection switch 5 is turned off, and the reproduction image is displayed on the viewfinder 6 (step 36).

Next, it is judged whether or not the count value of the counter of the syscon 7 is "0 second" (step 37),
When it reaches "0 second", the rewinding of the magnetic tape 10 is stopped and the rewinding state is changed to the recording pause state (step 38). Then, the operation of the reproduction signal processing circuit 15 is stopped, the connection switch 5 is turned on, the captured image is displayed on the viewfinder 6 (step 39), and the recording cancel operation is ended.

When the count value of the counter of the syscon 7 is "1 minute" or more in step 33, the tape speed is set to 15 times (step 40) and the magnetic tape 1
Rewinding of 0 is started (step 41).

Next, it is judged whether or not the count value of the counter of the syscon 7 is "10 seconds" (step 42),
When it becomes "10 seconds", the rewinding tape speed is changed to triple speed (step 43), and the process proceeds to step 36. The following is the same operation as described above (steps 36 to 3).
9).

As described above, in the present example, when the cancel amount is shorter than 1 minute, the rewinding tape speed is set to a triple speed, so that the magnetic tape 10 is placed at the start position of the recording portion to be canceled. Can be accurately rewound. If the amount of cancellation is longer than 1 minute, the rewinding tape speed will be as high as 15 times in the portion before the last 10 seconds of the recording portion to be canceled. Magnetic tape 1
0 can be quickly rewound, and the probability of missing a recording opportunity can be reduced. Since the tape speed is slowed to triple speed in the last 10 seconds of the recording portion to be canceled, the magnetic tape 10 can be accurately rewound to the start position of the recording portion to be canceled.

Further, since the reproduced image is displayed when the rewinding tape speed is 3 times, there is an advantage that the reproduced image of the recording portion to be canceled can be confirmed with a good image.

In the above embodiment, when the recording portion to be canceled, that is, the cancel amount is 1 minute or more, the tape speed is initially rewound at 15 times speed. At this time, it is possible to arbitrarily set whether to rewind at high speed. Further, the tape speed for rewinding is not limited to the above-described embodiment, and the tape speed can be switched not only in two steps but also in three steps or more. In that case, if the reproduced image is displayed after the speed at which a good reproduced image is obtained is reached, the reproduced image of the recording portion to be canceled can be confirmed with the good image.

Further, in the above embodiment, when the recording cancel key 20 is turned on in the recording state or the recording pause state, the rewinding is unconditionally performed to cancel the recording. When the amount is a predetermined amount or more, for example, 5 minutes or more, the recording cancel operation may not be performed.

Further, although the above-described embodiment is applied to the camera-integrated VTR, the present invention can be similarly applied to a general video tape recorder.

[0032]

According to the present invention, since the rewinding tape speed is changed according to the amount of the recording portion to be canceled, the start position of the recording portion to be canceled can be quickly changed regardless of the length of the recording portion to be canceled. In addition, the tape can be rewound accurately.

For example, when the recording portion to be canceled is smaller than a predetermined amount, the tape speed for rewinding is set low, so that the tape can be rewound to the starting position of the recording portion to be canceled with high precision. On the other hand, when the recording portion to be canceled is equal to or more than the predetermined amount, the tape speed for rewinding is set to a low speed at the last predetermined portion, and the previous portion is set to a high speed. In addition, the tape can be rewound accurately.

Further, since the reproduced image is displayed when the rewinding tape speed is low, there is an advantage that the reproduced image of the recording portion to be canceled can be confirmed with a good image.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing an outline of an operation of canceling recording from a recording state.

FIG. 3 is a diagram showing an outline of operations for canceling recording from a recording pause state.

FIG. 4 is a flowchart showing a recording cancel operation.

[Explanation of symbols]

 2 CCD solid-state imaging device 3 camera signal processing circuit 6 electronic viewfinder 7 system controller 9A, 9B rotating magnetic head 10 magnetic tape 11 capstan 12 recording signal processing circuit 15 reproduction signal processing circuit 16 capstan motor 18 frequency generator (capstan) FG) 19 Record key 20 Record cancel key

Claims (3)

[Claims] 1. A video tape recorder adapted to automatically rewind the tape to the start position of the recording portion in order to cancel the recording portion recorded immediately before on the tape when a recording cancel operation is performed. A video tape recorder, wherein the rewinding tape speed is changed according to the amount of the recording portion to be canceled. 2. The rewinding tape speed is set to a low speed when the recording portion to be canceled is smaller than a predetermined amount, and the rewinding tape speed is set to a final predetermined value when the recording portion to be canceled is a predetermined amount or more. 2. The video tape recorder according to claim 1, wherein the portion is slow and the previous portion is fast. 3. A video tape recorder according to claim 1, wherein a reproduced image is displayed when the rewinding tape speed is low.