JPS6236990A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To confirm simply and quickly the content of a magnetic tape by recording a reproducing signal from a magnetic tape on a recording medium as a still picture, reproducing the picture signal for output and repeating the said operation. CONSTITUTION:When a confirmation operation start command of a recording content of a magnetic tape is given, a control circuit 12 gives a command of taking a reproducing signal from a magnetic tape via a video circuit 4 and recording it on a recording medium 7 as a still picture to a recording circuit 6 and gives a command of outputting a reproducing signal at a video output terminal 8 to a changeover switch 9. While a reproducing signal is given at the terminal 8, the circuit 12 gives a reproducing command in response to a quick-traverse reproduction switch 10 and a rewinding reproduction switch 11 to a system control circuit 2. After a prescribed time elapses, a command of magnetic tape reproduction is given to the circuit 2, a command is given to the switch 9 to output the signal to the terminal 8 and gives a command recording the said signal to the circuit 6. The operations above are repeated until a stop command is received.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a magnetic recording and reproducing apparatus such as a video tape recorder which includes a medium for recording video signals in addition to a magnetic tape.

2. Description of the Related Art In recent years, magnetic recording and reproducing devices (hereinafter referred to as VTRs) have become very popular and are attracting great attention. Also, many video recordings can now be recorded on a single roll of magnetic tape,
As a means of checking the contents of a single roll of magnetic tape in VTRs that have been developed and designed to date, fast forward playback and
There are three methods: perform rewind play and check, fast-forward or rewind and check while playing midway, or a combination of both.

Problems to be Solved by the Invention However, in the above-mentioned method of checking the recorded contents of a magnetic tape, the method of checking the recorded contents by fast-forwarding and rewinding and playing in the middle is not compatible with the VH8 system.
It takes a lot of effort to unload, resulting in a large loss of time. In addition, the method of checking with fast-forward playback and rewind playback is that for both the VH8 and Beta systems, the magnetic tape forwarding speed or rewinding speed has a contradictory relationship with the image quality, so if the 1x speed ratio is increased, more noise will appear on the screen. It becomes difficult to see. On the other hand, both methods have a major problem in that if you want to reduce noise, you have to slow down the speed ratio.

In view of the above-mentioned problems, the present invention provides a magnetic recording and reproducing apparatus that uses a video signal recording medium other than a magnetic tape and has a function for checking the recorded contents of the magnetic tape.

Means for Solving the Problems In order to solve the above problems, the magnetic recording and reproducing apparatus of the present invention includes a running control circuit that controls the running of the magnetic tape when reproducing a program recorded on the magnetic tape, and a magnetic a first reproducing circuit for reproducing signals recorded on a tape; a recording medium capable of recording part of the signals recorded on the magnetic tape; a recording circuit for recording signals on the recording medium; and a recording circuit for recording signals on the recording medium. a second reproducing circuit for reproducing the signal reproduced from the recording medium; a selector switch for selecting a signal to be output to the video output terminal from among the signal reproduced from the recording medium and the signal reproduced from the magnetic tape; and the selector switch. a command to select a signal to be output to a video output terminal, a command to a recording circuit to record a signal reproduced from the magnetic tape on the recording medium, and then a command to reproduce the signal recorded on the recording medium. gives a command to the second reproducing circuit 5=-;
Alternatively, the control circuit may be configured to issue a rewind playback command and give a command to the first playback circuit to play back the magnetic tape after a certain period of time has elapsed.

Effects According to the present invention, when checking the contents of a magnetic tape on which many video programs are recorded with a VTR, the present invention records the playback signal from the magnetic tape on a recording medium and records the recorded signal. While playing from the medium and outputting it to the video output terminal, the magnetic tape is played in fast forward or rewind to the next scene, and the playback signal from the magnetic tape is recorded on the recording medium. This operation is repeated by reproducing the signal and outputting it to the video output terminal. This makes it easier to check the recorded content on magnetic tape, which conventionally required time and effort.Especially when moving the magnetic tape at fast forward/rewind playback at a high double speed, it is easier to check the content recorded on the magnetic tape. There was no noise bar on the screen and the screen was sharper.61・-.

You will be able to view it on a different screen.

Embodiment Hereinafter, an embodiment of the magnetic recording/reproducing apparatus of the present invention will be described with reference to the drawings.

FIG. 1 is a basic block diagram showing an embodiment of a magnetic recording/reproducing apparatus (hereinafter referred to as VTR) of the present invention. In Fig. 1, 1 is a conventional VTR, and 2 is a system control circuit (hereinafter referred to as a system control circuit) in the conventional VTR 1.
, 3 is a travel control circuit in the conventional VTR 1, 4 is a conventional VTR
A video circuit in the TR, 6 is a reproduction circuit that extracts a video signal from a recording medium 7, which will be described later, amplifies it, and sends it to the video circuit 4.
Reference numeral 6 denotes a recording circuit that takes in the video signal from the video circuit 4 and records it on a recording medium 7 to be described later, 7 a recording medium that stores the video signal in memory, and 8 a signal and reproduction circuit 6 from the video circuit 4 in the conventional VTRI. 9 is a changeover switch for selecting the signal output to the video output terminal 8 between the signal from the video circuit 4 in the conventional VTRI and the signal from the playback circuit 6; 1o and 11 are the rear The control circuit 1271 described in .

A fast forward playback switch and a rewind playback switch 12 give commands to move the magnetic tape in the direction and start operation; 12 gives a command to the recording circuit 6 to record video signals on the recording medium 7; A command is given to the reproduction circuit 5 to reproduce the signal, and a fast forward reproduction switch 1o is
, receives the output from the rewind playback switch 11, selects a signal to be output to the video output terminal 8 with the changeover switch 9, and sends a VTR mode command to the system control circuit 2,
This is a control circuit that receives the mode status of the VTR from the system control circuit 2.

The operation of the VTR of this embodiment constructed as described above will be explained in detail below with reference to FIG.

For example, it is not possible to easily and quickly check the recorded contents of magnetic tape.
In order to overcome the drawback that it is difficult to find the exact scene you want to see, the configuration of the VTR is as shown in Figure 1: a playback circuit 5, a recording circuit 6, a recording medium 7, a selector switch 9, a fast forward playback switch 10, and a rewind playback switch. A switch 11 and a control circuit 12 are added.

Next, the operation of checking a video program recorded on a magnetic tape with the VTR according to the present invention will be explained. A command is given to the control circuit 12 using either the fast forward playback switch 10 or the rewind playback switch 11 to start the operation of checking the recorded contents of the magnetic tape. The control circuit 12 that has been given the command gives a command to the changeover switch 9 to output the signal reproduced from the magnetic tape to the video output terminal 8,
It also gives a command to the system controller circuit 2 to reproduce the signal recorded on the magnetic tape. Then, a command is given to the recording circuit 6 to take in the signal reproduced from the magnetic tape from the video circuit 4 and record it on the recording medium 7 as a still image, and as soon as the signal is recorded on the recording medium 7, a command is given to the reproduction circuit 6 to start reproduction. The selector switch 9 is configured to give a command to reproduce the still image just recorded on the recording medium, and to output a signal to be reproduced from the recording medium γ to the video output terminal.
give instructions to. If the fast forward playback switch is pressed while the playback signal from the recording medium 7 is being output to the video output terminal, the control circuit 12 gives a command to the Cisco 91.-7 circuit 2 to fast forward playback to the magnetic tape. , If the rewind playback switch is pressed, the system controller circuit 2 sends a magnetic tape rewind playback command. And after a certain period of time,
A command is given to the system controller 2 to reproduce the magnetic tape, and a command is given to the changeover switch 9 to output a signal to be reproduced from the magnetic tape to the video output terminal. The above series of operations in which a command is given to the recording circuit 6 to record the reproduced signal from the magnetic tape onto the recording medium 7 is repeated until a stop command is given.

By performing the following series of operations, the video program recorded on the magnetic tape is displayed as clear still images at regular intervals on the monitor connected to the video output terminal, and the recorded contents of the magnetic tape are displayed on the monitor connected to the video output terminal. This allows you to check things easily and quickly, and also allows you to search for the scene you want to see on a clear screen.

At this time, the magnetic tape may be in any of the following states: the beginning, the middle, and the end.

Although the recording element was used in the above embodiments, FIGS. 2 and 3 show a case where a magnetic disk, which is a magnetic recording medium having a plurality of annular tracks and having a diameter of 1 ol·-/, is used as the recording element. I will explain using

First, the magnetic disk will be explained, and the recording pattern on the magnetic sheet is shown in FIG. 2° is a magnetic sheet,
21 is a first track, 22 is a second track, 23 is a final trunk, and 24 is a center core that holds the magnetic sheet 20. The magnetic disk has a plurality of annular tracks such as 21 and 22, and during recording and reproduction, the magnetic head is controlled by a control circuit 6 to scan each of the tracks and sequentially record and reproduce video signals. One screen can be recorded on one trunk, and since it is magnetically recorded, it is easy to erase and can be used any number of times.

FIG. 3 shows a basic block diagram of a recording/reproducing circuit when this magnetic disk is used. 30 indicates the magnetic head, 31 indicates the moving direction of the magnetic head 30, and 32 indicates the magnetic head 3.
33 is a recording amplification circuit that amplifies a reproduction signal from the magnetic head 30. A magnetic head 3o records and reproduces video signals on the magnetic head 20, and the magnetic head 3o is movable in the direction of an arrow 31 and can scan each track shown in FIG. 2, respectively. When recording, the video signal recorded by the VTR is taken in from the video circuit 3, amplified by the recording amplification circuit 32, and supplied to the magnetic head 3o to be recorded on the magnetic sheet 2o. In the case of reproduction, on the other hand, the magnetic head 3o extracts the video signal from the magnetic sheet 20, the reproduction amplification circuit 33 amplifies it, and sends it to the video circuit 3.

Although we have mentioned magnetic disks as recording elements here, there are other
Magnetic tape, magnetic bubble, semiconductor memory 1-MOS
RAM, C-MOS RAM), etc. can also be used.

FIG. 4 is a basic block diagram showing one embodiment of the VTR of the present invention shown in FIG. 1, and is a flowchart showing the basic operation when the control circuit 6 is constructed from a microcomputer. In the figure, in step 40, it is determined whether a command to start the operation has been issued based on whether either the fast forward switch or the rewind switch is ON. If either switch is ON and an operation start command has been issued, the process goes to step 41; if not, the process returns to the beginning. In step 41, a timer that counts fast forward and rewind times is reset. In step 42, VT
Sends a regeneration command to the system control circuit in R.

Step 43 causes a signal to be reproduced from the magnetic tape to be output to the video output terminal. Step 44 issues a command to record the reproduced signal from the magnetic tape on the recording medium.

In step 45, a command is given to reproduce the signal recorded on the recording medium in response to the command in step 44. In step 46, a signal to be reproduced from the recording medium is outputted to the video output terminal. In step 47, it is determined whether the fast-forward playback switch or the rewind playback switch is pressed. If the fast-forward switch is pressed, the process goes to step 48, and if the rewind switch is pressed, the process goes to step 49. In step 48, a fast forward 9 command is sent to the system control circuit of the VTR, and in step 49, a rewind command is sent to the system control circuit of the VTR. In step 5o, the mode status is read from the 13th page system control circuit of the VTR, and if it is a stop status, the process ends, and if it is not a stop status, the process goes to step 61. In step 61, the time for fast-forwarding or rewinding the magnetic tape is measured, and if it is within the time, the process goes to step 6o and fast-forwarding or rewinding the magnetic tape up to the time. If the time has exceeded, go to step 41, reset the timer, and
This series of operations, which includes sending a reproduction command to the R and recording the reproduction signal from the magnetic tape on the recording medium, is performed by the VTR.
Repeat until it reaches the stop state.

According to this embodiment as described above, the contents recorded on the magnetic tape can be easily confirmed as a clean image without noise, and the user can also search for the scene he/she wants to see.

Effects of the Invention As described above, according to the present invention, the content recorded on the magnetic tape is automatically displayed as a clear still image at a certain interval, making it possible to check the recorded content and also at the beginning of the program. Since the program is not broadcast, you can easily search for the scene you want to see within the recorded program.

14,\-2

[Brief explanation of drawings]

Fig. 1 is a basic block diagram showing an embodiment of the magnetic recording/reproducing device of the present invention, Fig. 2 is a recording pattern diagram on a magnetic sheet, and Fig. 3 is a basic block diagram of a recording/reproducing circuit when using a magnetic disk. FIG. 4 is a flowchart of the basic operation when the control circuit of the present invention is constituted by a microcomputer. 1... Conventional vTR12... Syscom control circuit, 3... Traveling control circuit, 4...
...Video circuit, 5...Reproduction circuit, 6.
...Recording circuit, 7...Recording medium, 8...
...Video output terminal, 9...Selector switch,
1o...Fast forward playback switch, 11...
・Rewind playback switch, 12...Control circuit, 2
0... Magnetic sheet, 21... First track, 22... Second track, 23...
・Final track, 24...Center core, 30
. . . Magnetic head, 31 . . . Movement direction of magnetic head, 32 . . . Recording amplification circuit, 33 .
...Regenerative amplification circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
1!1 Figure 3, 3/ L J

Claims (3)

[Claims] (1) A travel control circuit that controls the travel of the magnetic tape when reproducing a program recorded on the magnetic tape;
a first reproducing circuit that reproduces signals recorded on a magnetic tape; a recording medium that can record a part of the signals recorded on the magnetic tape; a recording circuit that records signals on the recording medium;
a second reproducing circuit that reproduces the signal recorded on the recording medium; and a changeover switch that selects a signal to be output to the video output terminal from among the signal reproduced from the recording medium and the signal reproduced from the magnetic tape. and giving a command to the changeover switch to select a signal to be output to the video output terminal, giving a command to the recording circuit to record the signal reproduced from the magnetic tape on the recording medium, and then recording the signal on the recording medium. A command is given to the second reproducing circuit to reproduce the signal, a fast-forward reproduction command or a rewind reproduction command of the magnetic tape is given to the travel control circuit, and the second reproduction circuit is given a command to reproduce the magnetic tape after a predetermined period of time has elapsed. 1. A magnetic recording and reproducing device comprising: a control circuit that gives commands to one reproducing circuit. (2) The magnetic recording and reproducing apparatus according to claim 1, wherein the recording medium on which the video signal is recorded is a magnetic disk that records on a plurality of annular tracks, respectively. (3) The magnetic recording and reproducing apparatus according to claim 1, wherein the recording medium on which the video signal is recorded is a semiconductor memory.