JPH04165783A - Magnetic reproducing device - Google Patents

Abstract

PURPOSE:To output a reproduction video in a still position even in a stand-by off state by storing a reproduction video signal in a video memory when shifting from a still state to the stand-by off state and outputting a stored reproduction video signal in the stand-by off state. CONSTITUTION:A video memory part 3 stores a video signal 25 in a field memory by one field unit to simultaneously output the signal 25 as a video output 23. In such a case, after the lapse of the fixed time of the stand-by off SW operation or the still state time, first, the writing to the memory of the new video signal 25 by the video memory part 3 is interrupted, and the contents are outputted by video. Then, the rotation of a rotary cylinder 4 is stopped respectively by control signals 17 to 19, a pinch roller is separated from a capstan 12, the driving of a reel motor is stopped, and the tension of a tape is eliminated to obtain the stand-by off state. Thus, the reproduction video in the still position can be outputted even in the stand-by off state.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rotating head magnetic reproducing device which is capable of outputting a reproduced video at a stop position even in a standby off state for the purpose of tape protection. be.

Conventional technology In a rotating head magnetic playback device, in the standby off state, the tape tension is loosened, or the tape tension is loosened and the rotating head is stopped, thereby minimizing tape movement and protecting the tape. We are making it happen.

Problems to be Solved by the Invention However, with the above configuration, the rotary head cannot trace the magnetic tape exactly, so it is not possible to check the reproduced image at the stop position.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides a rotary head magnetic reproducing device that can output a reproduced image at a stop position even in a standby off state for the purpose of protecting the tape.

Means for Solving the Problems In order to solve the above problems, the magnetic reproducing device of the present invention has the following features:
It has a standby-off (ready-off) state for the purpose of tape protection from the still state.
It has a video memory that can store a video signal for 1 frame), and when transitioning from the previous still state to the standby off state, the reproduced video signal is stored in the video memory, and in the standby off state, the reproduced video signal is stored in the video memory. It is configured to output the stored reproduced video signal.

Effect of the Invention With the above-described configuration of the present invention, the rotary head magnetic reproducing apparatus can output a reproduced image at the stop position even in a standby off state for the purpose of protecting the tape.

Embodiments Hereinafter, magnetic reproducing apparatuses according to embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of the present invention,
FIG. 2 is a diagram showing the tape running system. 1 is a playback head, 2 is a video playback circuit that returns the output of the playback head 1 to a video signal, 3 is a video memory unit that can store one field of video signals, and 4 is a circuit that rotates the playback head 1. 5 is a rotating cylinder control unit, 6 is a system control unit that controls the timing of the entire system, 7 is an operation SW unit, and 8 is a pinch roller crimping unit that crimps the pinch roller 27. 9 is a solenoid drive unit that drives the pinch roller crimping solenoid 8; 10 is a reel motor that supplies and winds up the magnetic tape; 11
is a reel motor drive unit, 12 is a capstan motor that feeds the tape at a constant speed, 13 is a capstan motor drive unit, 14 is a loading motor that generates a movement to pull out the tape to the rotating cylinder, 15 is the loading motor drive section.

The operation of the magnetic recording/reproducing apparatus configured as described above will be described below.

Now, in the still state shown in Figure 2 (the rotating cylinder 4 is rotating at a constant rotation, the pinch roller crimping solenoid 8 is
, the pinch roller 27 is pressed against the capstan motor 12, the capstan motor 12 is stopped, and the reel motor 10 is
holds the tape at a constant tension). In the still state, the output from the playback head 1 is converted into a video signal 25 by the video playback circuit 2. The video memory section 3 receives the video signal 25
is stored in the memory for each field in units of one field, and simultaneously outputted as a video output 23. Here, if the standby-off SW operation or the still state has elapsed for a certain period of time or more, the system control unit 6 shifts to the standby-off state in the order shown below. First, the control signal 16 sends a new video signal 25 to the video memory section 3.
Stops writing to the memory, and outputs the contents of the memory as a video output. Second, control signals 17, 18, and 19 are used to stop the rotation of the rotary cylinders 4, deactivate the pinch roller drive solenoid, release the pinch roller 27 from the capstan 12, and stop the reel motor to reduce the tape tension. lose.

Effects of the Invention As described above, according to the present invention, in a rotary head magnetic reproducing device, an excellent effect can be obtained in that a reproduced video at the stop position can be output even in a standby off state for the purpose of protecting the tape. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the structure of an embodiment of the present invention, and FIG. 2 is a plan view showing the structure of a tape running system of the same embodiment. 1... Playback head, 2... Video playback circuit, 3... Video memory section, 4... Rotating cylinder, 5... Cylinder Rotation control section, 6...
...System control unit, 7...Operation SW, S...Pinch roller crimping solenoid,
9... Solenoid drive section, 10...- Reel motor, 11... Reel motor drive section, 12.
...Capstan motor.

Claims (1)

[Claims] A rotary head magnetic reproducing device has a standby-off (ready-off) state for the purpose of protecting the tape from a still state, and has a video memory capable of storing one field (or one frame) worth of video signals, The magnetic recording device has a configuration in which a reproduced video signal is stored in the video memory when transitioning from the standby off state to the standby off state, and the stored reproduced video signal is output from the video memory in the standby off state. playback device.