JPH03187045A - Video tape recorder - Google Patents

Abstract

PURPOSE:To perform a simple operation for cutting an unnecessary part by operating a rotator under the state of a pause in video recording to change this state over to the reproducing state and returning the state to the pause in video recording when the rotator is stopped or restored to its initial position. CONSTITUTION:When a jog dial 11 or a shuttle ring 12 is operated under the state of the pause in video recording, switch circuits 4 and 7 are changed from recording side terminals r to the reproducing side to cut the unnecessary part. Next, the desired reproducing operation is carried out by rotating the dial 11 or the ring 12. Consequently, a capstan motor M2 and a mechanism control part MP are controlled by a control circuit 10, and when the lead of the unnecessary part is brought forward in monitoring a picture of a monitor 9, the dial 11 is stopped in its rotation or the ring 12 is released from an operator's hand. By this method, the circuits 4 and 7 are returned to their state of connecting the terminals r, while a mechanism part is brought back under the pausing state. Thus, the unnecessary part such as a commercial picture, etc., is easily cut out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video tape recorder, and particularly to one equipped with a rotor for controlling the tape running state.

[Summary of the invention]

This invention has a rotor and a control circuit for controlling the tape speed and tape direction according to the rotation speed and rotation direction or the rotation angle and rotation direction, and operates the rotor to rotate the tape in a recording pause state. It returns to the recording pause state when the child stops or returns to the initial position, making it possible to easily cut out unnecessary portions of the recorded content.

[Conventional technology]

2. Description of the Related Art As a video tape recorder (abbreviated as VTR), one is known that can freely control tape running and is equipped with a jitter dial or shuttle ring for performing special playback. The jidder dial defines the tape running direction according to its rotational direction, and defines the tape speed according to its rotational speed. The shuttle ring defines the tape speed according to the rotation angle, and defines the tape running direction according to the rotation direction.

For example, the Jeddah dial allows you to freely move the reproduced image from frame-by-frame to slow playback to standard playback, and forward and reverse movement is also possible. In addition, the shuttle ring allows you to select between still images, 115x speed, standard, and
You can switch between double speed and picture search, and forward and reverse movement is also possible. Control using the Jeddah dial or shuttle ring was possible during normal playback.

Furthermore, conventional VTRs are provided with a recording pause switch that temporarily stops recording. This recording pause switch is used when you want to cut out commercials while recording a television program.

[Problem to be solved by the invention]

However, there have been cases where the timing of operating the recording pause switch is delayed, resulting in part of the commercial being recorded. In this case, it is necessary to return to the playback state and use the jitter dial or shuttle ring to return the tape to the beginning where unnecessary portions have been recorded, resulting in poor operability.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a VTR in which unnecessary recorded portions can be easily searched for using a jitter dial or shuttle ring while recording is temporarily stopped, and unnecessary recorded portions can be easily cut.

[Means to solve the problem]

This invention provides a rotor (11 or 12) and a control circuit (10, 16) for controlling the tape speed and tape direction according to the rotation speed and rotation direction or the rotation angle and rotation direction.
, and when the recording is paused, the rotor (11 or 12)
The video tape recorder returns to the recording pause state when the rotor (11 or 12) is stopped or returned to its initial position.

[Effect]

In the recording pause state, special playback can be performed by operating the jog dial 11 or shuttle ring 12. Therefore, unnecessary recorded parts can be easily cut out.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1 is the antenna terminal of the VTR, 2 is the tuner and IF circuit built into the VTR, 3 is the tuner and IF circuit 2
This is a recording signal processing circuit for converting video and audio signals from A recording signal is supplied to the tape head system 5 via the recording side terminal r of the switch circuit 4. The tape head system 5 has a pair of magnetic heads attached to a drum rotating at a frame frequency, and the magnetic heads alternately contact magnetic tape wound diagonally around the circumferential surface of the drum. The drum is rotated by a drum monitor M1, and the magnetic tape is rotated by a capstan monitor M2.

A signal reproduced from the magnetic tape by the magnetic head is supplied to the reproduction signal processing circuit 6 through the reproduction side terminal p of the switch circuit 4-. The video signal and audio signal from the reproduction signal processing circuit 6 are supplied to the reproduction side terminal p of the switch circuit 7. A recording side terminal r of the switch circuit 7 is supplied with a video signal and an audio signal from the tuner and IF circuit 2. The video signal and audio signal selected by the switch circuit 7 are guided to the output terminal 8. A monitor 9 is connected to this output terminal 8.

A mechanical control section MP is provided to control the state of the mechanical section including the tape head system 5 and to detect this state. A signal from the control circuit 10 is supplied to the mechanical control section MP, and a detection signal from the mechanical control section MP is also supplied to the control circuit 10. The control circuit 10 is composed of a microcomputer and controls the entire operation of the VTR. That is, the control circuit 10 performs the tuning operation of the tuner and IF circuit 2, the switching of the switch circuits 4 and 7, the driving of the drum motor M1 and the capstan motor M2, the generation of commands to the mechanical control section MP, and the like.

The operation panel of the VTR is provided with a jeddah dial 11, and a shuttle ring 1 is provided concentrically with the jeddah dial 11.
2 is provided. The jog dial 11 can rotate freely, and the shuttle ring 12 is configured to return to the reset position with a spring when released.

Rotation detectors 13 and 14 in conjunction with the Jeddah dial 11
is provided. The detection pulses FGI and Fe2 from these rotation detectors I3 and 14 are pulse signals that have a phase difference of 90' and are generated in a predetermined number per rotation. The rotational speed can be detected from the frequencies of the detection pulses FGI and Fe2, and the rotational direction can be detected from the phase relationship.

Detection pulses FGI and Fe2 from rotation detectors 13 and 14 are supplied to a J/S controller 16, respectively.

Further, a sensor 15 is provided to detect the rotation angle and rotation direction of the shuttle ring 12. The sensor 15 is
An example is a rotary encoder consisting of a code plate and an optical detector. A detection signal from the sensor 15 is supplied to the J/S controller 16.

Further, a reset pulse generated at the reset position of the shuttle ring 12 is also supplied to the J/S controller 16.

The J/S controller 16 includes rotation detectors 13 and 14,
Upon receiving each output signal from the sensor 15, a remote control signal and a speed signal corresponding to the operation mode are output to the control circuit 10.

For example, by operating the Jidda dial 11, variable speed playback can be performed in a range from frame-by-frame forwarding to normal playback, depending on the rotational speed, and the direction of image movement can be defined by the rotational direction. By operating the shuttle ring 12, it is possible to specify the movement of the image in the direction of rotation, and also to select one operation (still image playback, 115x speed, normal playback, 2x speed, picture search) depending on the rotation angle. .

The special playback operation by operating the jog dial 11 and shuttle ring 12 is possible in any of the normal playback state, the pause state of the normal playback state, and the recording pause state. This special playback is useful for cueing during editing, and is also useful for cutting out unnecessary parts, such as commercial images, during recording. The J/S controller 16 determines that the jog dial 11 has been turned or that the shuttle ring 12 has been turned from the reset position, and the process shifts to the above-described special playback operation. jeddah dial 11
When the rotation of the shuttle ring 12 stops or the shuttle ring 12 returns to the reset position, the previous state is restored, for example after 2 seconds.

To interrupt recording, a recording pause switch (not shown) is pressed. This causes the magnetic tape to stop. However, there may be a slight delay in operating the switch and unnecessary parts may be recorded. In order to cut this unnecessary portion, when the jitter dial 11 or the shuttle ring 12 is operated while recording is paused, the switch circuits 4 and 7 are switched from the recording side terminal r to the playback side terminal p.

Next, the desired playback operation is performed by turning the jitter dial 11 or the shuttle ring 12. For this purpose, the capstan motor M2 and the mechanical control unit MP are controlled by the control circuit IO. While viewing the image on the monitor 9, when the user reaches the beginning of the unnecessary portion, the rotation of the jitter dial 11 is stopped or the shuttle ring 12 is released. As a result, the switch circuits 4 and 7 return to the state where they are connected to the recording side terminal r, and the mechanism returns to the state where recording is temporarily stopped.

Therefore, the next time the recording pause is canceled, the recording operation will be restarted.

〔Effect of the invention〕

According to the present invention, even when recording is temporarily stopped, special playback can be performed by operating the jitter dial or shuttle ring, so unnecessary portions can be cut out with a simple operation.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. Explanation of main symbols in drawings 3: recording signal processing circuit, 4.7: Record/playback switch 5: Tape head system, 11: Jeddah dial, 12: Shuttle ring. switch circuit,

Claims (1)

[Claims] It has a rotor and a control circuit for controlling the tape speed and tape direction according to the rotation speed and rotation direction or the rotation angle and rotation direction, and when the recording is paused, the rotor is operated and the rotation of the rotor is controlled. A video tape recorder characterized in that the video tape recorder returns to the recording pause state when stopped or returned to an initial position.