JPS59207446A - Video signal reproducer - Google Patents

Abstract

PURPOSE:To improve the operability of a video signal reproducer without any complicated key operation by designating a repeat reproduction section with a simple key operation. CONSTITUTION:Driving means 19 and 20 shift a long record tape in both reverse and forward directions, and a reproduction means 26 reproduces the video signal recorded on the tape. A designation key 21 designates a repeat reproduction section of the tape, and a control means controls the means 19, 20 and 26 in order to reproduce repetitively the designated section. Then the control means actuates the means 19 with the first operation of the key 21 to shift reverse the tape and can set a desired repeat reproduction section while confirming the recorded pictures. In addition, the complicated key operations can be omitted to improve the operability of a video signal reproducer.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a video signal reproducing device for reproducing video signals from a long recording tape, and more particularly to a reproducing device having a function of repeatedly reproducing the same section of a recording tape.

Hereinafter, the present invention will be explained by taking as an example the case where it is applied to a magnetic recording/reproducing apparatus t (hereinafter VTJ).

(Description of Prior Art) Generally, when playing 111 times repeatedly with a conventional VTR, the operation keys for stopping, reversing, stopping, and forward playback are operated in sequence, and the operation keys are repeated many times. I had to repeat it.

By learning something from recorded tapes, or by repeatedly watching the movements of skilled athletes, one learns one's own weaknesses and is able to recognize them. It is often the case that a song is played repeatedly until it reaches the end. This is golf.

In all sports, such as baseball, polling, tennis, skiing, and skating, it is said that the quickest way to improve is to imitate the every move of an expert.

However, if you are looking at the screen and you are also doing the swing repeatedly, it will stop and reverse.

The operation is interrupted by the key operation of stop and forward play,
Not only can I not concentrate on practicing, but the tracking of the playback head with respect to the recording track is misaligned each time.

(Objective of the Invention) In view of the above-mentioned shortcomings of the prior art, the present invention provides a video signal reproducing device capable of specifying a repeated reproduction section by a simple key operation, and also capable of repeating the reproduction. As a purpose.

(Example review, light) FIG. 1 is a control circuit diagram of a first embodiment of the present invention.

In the figure, lj is a display that displays the contents of tape counter O, 2 is a decoder that converts the data of tape counter O into a take for display, and 3 is a chip counter that is not shown.
J-/remotor rotation frequency signal.When the reel motor rotates in the forward direction, the count is amplified, and when the reel motor rotates in the reverse direction, it counts down.

4 is a D-type frig-frog (hereinafter referred to as DFF), which inputs the signal from the repeat playback operation key 21 to the D terminal;
It operates in synchronization with the clock from the clock generator 8.

5 is a D F F similar to 4, and the Q output of DF14 is its D
input to the terminal. 6.7 is an AND gate that forms a latch signal to store the contents of the counter in register 9.10, 8 is a clock generator, 9.10 is a register, and register 9 stores the data of counter 6 at the start position of repeat playback. 10 stores end position data.

11.12 is a comparator that compares the magnitude of data in counter 6 and registers 9 and 1°, respectively; 13.1'4°22.25
is an or gate, 15.16 is a Norilag flop (hereinafter F
F), 17.18 is an ant gate, 19 is a reversing device that drives the tape in reverse, 20 is a normal rotation device that drives the tape in forward rotation, 21
26 is a repeat playback operation key, 26 is a reset key for the counter 6, 24 is a normal playback operation key, and 26 is a playback circuit including a playback head and a playback signal processing circuit.

Explain the operation. When the apparatus is in the reproduction mode, the data on the counter 6 receives the frequency signal PG from the reel motor, and increases or decreases in accordance with the forward or reverse rotation of the reel motor. At this time, repeat playback operation key (hereinafter referred to as repeat key) 2
When 1 is pressed, a high level signal is input to the D terminal of DFl4, and the Q output of DFl4 becomes high level in synchronization with the rising edge of the clock of the clock generator 8. Then D
The D terminal of F F' 5 also becomes high level, and the Q output of D F F 5 becomes high level after waiting for the rise of the next clock. And gate 7 connects the Q output of DFl4 and DPI! Since the Q output of DF14 is input, it becomes high level at the first rising edge of the clock after the repeat key suppression operation, and becomes low level at the rising edge of the next clock. Output and DFl”5
Since the Q output of is input, conversely, repeat key 21
It becomes high level for one clock interval after the operation of releasing is performed.

The high level output of the AND gate 7 causes the register 10 to latch the data of the counter 6 when the repeat key 21 is depressed, and the output of the gate 6 causes the register 9 to latch the data when the repeat key 21 is released.

The Q output of the FF 16 is normally at a low level because @@PO, which becomes a high level only when a power switch (not shown) is turned on, is input to the R terminal of the FF 16 via an OR gate. Furthermore, even in the playback mode, the output of the playback operation key 24 is at a high level, so the Q output of the FF 16 is at a low level.

When the repeat key 21 is pressed here, the Q output of h'Fi 6 becomes high level and opens the AND gate 17°1B. On the other hand, due to the latch signal of gate 7, OR gate 1
6: E' F i 5 is set, so the output of the AND gate 17 activates the regeneration circuit 26 via the reversing drive 19 and the OR gate 25. That is, the device enters the reverse playback mode.

Then, the user continues to press the repeat key 21 while watching the TV monitor until the position where he or she wants to start repeat reproduction is reached, and releases the repeat key 21 when the user reaches the starting position.

Then, as described above, the output of gate B becomes high level for one clock interval, and the contents of the counter 6 at that time are latched into the register 9. At the same time, F via or gate 22
Reset F15, stop reverse rotation, and gate 18
The tape is rotated in the normal direction by the normal rotation driving device 20 via the normal rotation drive device 20. At this time, since the regeneration circuit 26 also maintains the regeneration state, the normal rotation regeneration mode is entered.

In the normal rotation reproduction mode, the counter 6 counts up the signal FG. Then, when the counter 6 is compared, the Q output of ≠cut=≠12 becomes high level, and the F
l! '15 to automatically shift the device to reverse playback mode.

When the reverse reproduction mode is entered, the counter 6 counts down the signal FG. Then, the data of the counter 6 stores the data of the repeat start position, and when the data becomes equal to or smaller than the arc of the register 11, the Q output of the comparator 11 is at a high level. :, resets the FF 15 and automatically shifts to forward playback mode.

This operation is repeated thereafter.

In this way, reproduction is repeated on the tape between the position where the repeat reproduction operation key 21 is pressed and the position where it is released.

For repeat playback operation, press the repeat key 21 again.
Alternatively, it can be canceled by pressing the playback key 24. That is, the Q output of FF16 becomes low level and the gate 17
．． This is executed by closing 18. In addition to this, there is a stop key and a fast forward key.

It is also possible to design it so that it can be canceled by other operation keys such as a rewind key.

As described above, since the tape starts rotating in reverse by the first key operation of the repeat key, the end position of the repeat section can be set first. In other words, it is possible to set the repeat section after confirming what kind of video is recorded in the section that the user wants to perform repeat playback, so there is no need to specify an unexpected section, and the key The operation is also extremely simple.

FIG. 2 is a diagram showing a part of the control circuit, ie, the key input section, of a second embodiment of the present invention. Other parts are the same as in FIG. In the figure, 29 is a flip-flop. When repeat key 21' is pressed, FF29 is set and Q
The output becomes high level and the first
The end position of the repeat section is set in the register 10 in the figure, and the tape is reversed. When the repeat key 21' is pressed for the second time, the FF 29 is reset and the Q output becomes high level, the start position of the repeat section is set in the register 9 via the AND gate 6, and the tape rotates forward.

In this way, in the second embodiment, there is no need to keep pressing the repeat key while the tape is reversed from the end position to the start position of the repeat section.

FIG. 6 is a control circuit diagram of a sixth embodiment of the present invention. In the figure, parts having the same functions as those in FIG. 1 are given the same numbers. Further, 27 is a timer circuit whose output rises when the repeat key 21'' is operated and holds a high level signal for a period determined by a variable resistor 28.
In this embodiment, the end position of the repeat section is determined by pressing the repeat key 21, and the start position is determined by separating the repeat key 21, but in this embodiment, only the end position of the repeat section is determined by pressing the repeat key 21. 21" is determined by the operation, and the starting position is automatically determined by the output of the limb timer circuit 27. Therefore, two key operations are required to set the start position q~.
. Moreover, by varying the value of the variable resistor 28, it is possible to change the length of the repeat section.

In this embodiment, the count is performed using a signal related to the rotation of the reel motor, but it is also possible to count a signal related to the rotation of the cab stan motor.

Further, although the configuration is such that the regeneration is performed during the reversal operation during repeat, the regeneration operation may be configured such that the regeneration operation is not performed except when the repeat start position is specified.

(Explanation of Effects) The playback device of the present invention starts reversing the tape by pressing the first designated key (-1~). Since it is possible to set a repeat section, there is no need to specify parts that are not as expected.Furthermore, even when the user suddenly wants to see the part that was just monitored again, there is no need to perform complicated key operations. Therefore, it is a candy and easy to use for the user.

[Brief explanation of drawings]

FIG. 1 is a control circuit diagram of the VTR of the first embodiment, FIG. 2 is a diagram showing a part of the control circuit of the second embodiment, and FIG.
FIG. 3 is a control circuit diagram of an embodiment of the present invention. In the figure, 1 is a display, 2 is a decoder, 6 is a register, Ii, 12 is a comparator, i6. i4゜22.25 is orgate, 15. i6.29 is a flip-flop, 19
．． 20 are reverse and forward rotation drive units ri'j, ', 21.2, respectively.
1' and 21'' are repeat playback operation keys, 26 is a playback circuit, 27 is a timer circuit, and 28 is a variable resistor, respectively.

Claims (1)

[Claims] A drive means for moving a long recording tape in forward and reverse directions, and a drive means for reproducing a video signal recorded on the tape.
- repeating a predetermined section of the tape 11;
a designation key for specifying the predetermined section in order to play back the predetermined section; and a control means for controlling the cornering means and the driving means; A video playback device characterized in that the drive means is operated to move the tape in the opposite direction by operating a specified key to the maximum number.