JPH0248989Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a video tape recorder, and more specifically, the invention automatically stops the tape being rewound when the value of a counter indicating the tape running position reaches a predetermined value. The present invention relates to a video tape recorder with functions.

[Technical background of the invention]

In a video tape recorder, when the value of the counter indicating the tape running position (in this specification, this means including the tape running time) reaches a predetermined value (for example, zero), the video tape recorder starts running in rewind mode. Some devices have a function that automatically stops the tape being played. For example, if there is a program that you want to watch repeatedly, the counter is reset to zero at the first tape position of that program. Then turn on the switch (called a counter memory switch, etc.). After the program has finished, press the rewind button if you want to watch it again. The tape then automatically stops when the counter reaches zero. This way the tape will stop at the beginning of the program, so
The operator can view the program repeatedly by pressing the play button. The same applies when playing back to confirm what has been recorded.

[Problems with background technology]

By the way, when the above-described operation is repeated, there is a problem in that the tape position when the counter value is zero shifts. In other words, after rewinding to the position where the counter value becomes zero,
If you repeat various modes such as fast forwarding, rewinding, or playback, or if you rewind the tape to the point where the counter value becomes zero, or if you repeat the above operations, the problem may occur due to changes in the winding state of the tape, etc. There were times when a discrepancy occurred in the value of the counter indicating the tape position. Therefore, the initial tape position when the counter value is 0 will be different from the above tape position after the operation, and when you rewind, you will be told that the tape position is different from the one you want to see. was occurring. The above problem occurs regardless of the configuration of the counter, although there are differences in degree.

[Purpose of invention]

The present invention has been made in consideration of the above-mentioned points, and an object of the present invention is to provide a video tape recorder that allows a user to easily search for the desired tape position even when a discrepancy occurs in the value of the tape counter. .

[Summary of the idea]

In this invention, when the tape being rewound is automatically stopped when the value of the counter indicating the tape running position reaches a predetermined value, the operation mode of the video tape recorder is changed from the rewind mode to the rewind mode before the tape is stopped. After shifting to playback mode, the tape is stopped.

[Example of idea]

FIG. 1 is a block diagram showing the essential parts of an embodiment of a video tape recorder according to the present invention.

In the figure, 1 is a microcomputer,
This is composed of an arithmetic processing unit (hereinafter referred to as CPU) 2, an input/output interface 3, and a memory 4. The microcomputer 1 includes an operation key switch 5, a counter memory switch 6, and a counter 7.
is connected. Also connected to the microcomputer 1 are output terminals for controlling the tape running mode of the video tape recorder, 8 is a rewind mode output terminal, 9 is a rewind playback mode output terminal, and 9 is a stop mode output terminal. be. In addition,
There are other output terminals corresponding to each mode, but these are not shown.

Next, referring also to FIG. 2, which is a flowchart of processing operations within the microcomputer 1,
The operation of the video tape recorder shown in the figure will be explained.

If the operator of the video tape recorder does not turn on the counter memory switch 6, the video tape recorder operates normally. That is,
through the input/output interface 3 of the microcomputer 1 by operating the operation key switch 5.
An operation signal is input to the CPU 2, from which outputs for each mode are output, and operations such as playback, recording, fast forwarding, rewinding, etc. are performed normally. If you want to play the program again after recording, or if you want to watch the same program repeatedly, turn on the counter memory switch 6 and reset the counter 7 at the same time, making the value of the counter 7 zero. This counter 7 may be a general counter, and in this embodiment, it is an electronic counter that counts pulses obtained by the rotation of the reels. This count value is displayed on a display device (not shown).

After recording or reproducing a certain program, if you want to watch it again from the beginning, you can rewind it by operating the operating key switch 5. In other words, the rewind button switch in the operation key switch 5
When turned ON, a rewind mode output is outputted from the microcomputer 1 to the terminal 8, thereby putting the video tape recorder in the rewind mode. The CPU 2 of the microcomputer 1 determines whether the counter memory switch 6 is ON (see step S1 in Figure 2), and if it is ON, then determines whether it is in rewind mode (step S2 in Figure 2). mode, the CPU 2 further compares the count value input from the counter 7 via the input/output interface 3 with a predetermined value a (>0) stored in advance in the memory 4. Step S3 in FIG. 2), and when the two match, a rewind playback mode output is output to the terminal 9 via the input/output interface 3 (step S4 in FIG. 2). This puts the video tape recorder into a rewind playback state. This rewind playback is a mode in which, along with fast forward playback, the tape is fed at a faster speed than usual and the reproduced image can be viewed. After the tape has run in this mode, the CPU 2 then determines whether the value of the counter 7 has reached zero (step S5 in FIG. 2). When the value of the counter 7 coincides with zero, the microcomputer 1 outputs from the terminal 10 an output signal that puts the video tape recorder in a stop mode (step S6 in FIG. 2). As a result, the tape stops at the point (position) when the value of the counter 7 becomes zero.

Here, the value of a may be set appropriately, for example, a count value that corresponds to about 3 minutes when converted to normal playback (it is sufficient to take the average of the count values that advance when the tape runs for 3 minutes at normal playback speed). It's fine. At this time, if the tape speed during rewind playback is 15 times the tape speed during normal playback, the time for rewind playback is about 12 seconds (= 3 minutes / 15), which does not seem that long. I can't.

Note that the counter memory switch 6 may be operated at any time before entering the rewind mode.

As described above, according to this embodiment, even if the value of the counter 7 deviates slightly by repeating various modes, when rewinding to a predetermined position, the rewind playback state is entered before stopping. , you can easily find your desired tape position. Also, if you have forgotten the contents of the target tape position, you can know the outline.

In this embodiment, an electronic counter that counts reel rotation pulses is used as the counter 7, but it may also be an electronic counter that counts control pulses recorded on a tape, for example. In the case of a mechanical counter, a switch may be provided which generates a signal when the count value is greater than zero, and this signal causes the video tape recorder to shift from the rewind mode to the rewind playback mode. The same applies to stopping when the count value is zero, and it is sufficient to provide a switch that generates a signal when the count value is zero. Furthermore, in the case of an electronic counter, by storing the count value in a memory, it is also possible to stop the tape when the count is a non-zero value. If the count value at the stop position in this case is b, then the count value for setting the rewind playback mode in this embodiment is a
+b. Furthermore, in this embodiment, a video tape recorder has been described which only has the function of stopping when the counter value is zero in the rewind mode, but it also stops when the counter value is zero in the fast forward mode (the counter value is, for example, Of course, it is also applicable to a 4-digit counter that also has the function of changing from "8800" to "0000".

[Effect of idea]

As described above, according to the present invention, in a video tape recorder having a function of rewinding and automatically stopping the tape when the counter reaches a predetermined count value, it is possible to repeat various tape running modes, etc. Therefore, it is possible to provide a video tape recorder that can easily find the target tape position even if the count value of the counter goes out of order.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the essential parts of an embodiment of the video tape recorder according to the present invention, and FIG. 2 is a flowchart showing the processing operations of the microcomputer shown in FIG. 1...Microcomputer, 2...CPU,
3...I/O interface, 4...Memory, 5
...Operation key switch, 6...Counter memory switch, 7...Counter, 8...Rewind mode output terminal, 9...Rewind playback mode output terminal, 10
...Stop mode output terminal.

Claims (1)

[Scope of utility model registration request] In a video tape recorder that has a function of automatically stopping a tape being rewound when the value of a counter indicating the tape running position reaches a predetermined value, the operation mode of the video tape recorder can be changed by outputting various mode outputs. and a detection means for detecting that the value of the counter indicating the tape running position during tape rewinding has reached a value larger than the predetermined value by a predetermined amount, the detection means A video tape recorder characterized in that it is configured to cause a microcomputer to output a rewind playback mode output based on a detection output from a microcomputer, thereby shifting the operation mode of the video tape recorder from a rewind mode to a rewind playback mode.