JPS63152286A - Video signal reproducing device - Google Patents

Abstract

PURPOSE:To quickly and easily seek a desired picture recording scene with simple operation by applying key operation so as to switch a device into a high speed reproducing mode when fast forewarding or rewinding is executed. CONSTITUTION:In depressing a reproduction key 1 when the input port (b) of the sequence control section 9 is at an H level by the depression of the fast foreward key 2, an output of an AND gate 16 goes to an H level and an input port (g) goes also to an H level. When both the input ports (b), (g) go to H level, the fast foreward display mode is attained and the tape speed and the drum rotary speed are controlled to give easy to see picture, e.g., 30 times of tape speed by a drive circuit 10 and the signal processing circuit 11 is switched into the state outputting a video signal from a terminal 19b by using a reproducing signal from a reproducing head 12 and the picture display which is easy to seek the desired video recording scene is obtained. Similarly, in depressing the reproducing key 1 after the rewinding key 3 is depressed, the rewinding display mode is switched.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a video signal reproducing device that performs fast forwarding and rewinding with a magnetic tape in contact with a video head.

(Prior Art) When recording a movie, for example, in a magnetic recording/reproducing device (VTR) that uses magnetic tape as a recording medium for video signals, there are cases where it is desired to search for a desired scene. The so-called search function, fast forwarding and rewinding functions, cueing function, etc. The function is to search for the desired scene, and the fast-forward and rewind functions stop the magnetic tape at an appropriate position and then operate the playback key to view the playback screen.The cue function also allows you to search for a predetermined scene. The position (head) is found by key operation.

(Problems to be Solved by the Invention) However, in conventional VTRs, there is a problem in that, as described above, when searching for a desired recorded scene, it is not easy to search. That is, the above-mentioned search function generally requires a slow tape speed, making it difficult to quickly search for a desired scene on a long-time recording tape, and the user must keep pressing the search button. The fast-forward and rewind functions are inconvenient because although the tape speed is fast, the playback screen cannot be seen and the stop and play keys must be pressed many times. In addition, the cue function can only find a specific location, making it difficult to search for an arbitrary location.

The present invention has been made in view of these problems, and it is an object of the present invention to provide a video signal reproducing device that allows a user to easily search for a desired recorded scene with a simple operation.

[Means for solving problems]

The video signal reproducing device of the present invention is a device that performs fast forwarding and rewinding by bringing a magnetic tape into contact with a video head, and outputs a video signal played by the video head while fast forwarding or rewinding is being performed. It is equipped with an operation key for switching to the playback state.

(Function) By configuring as described above, when fast forwarding or rewinding is being performed, the device can be switched to high speed playback mode by key operation. With simple operations, you can easily and quickly record a desired scene in depth.

〔Example〕

FIG. 1 is a circuit diagram showing the configuration of the main parts of a VTR as an embodiment of the present invention, showing the main parts of the control system. In the figure, 1
~4 are the playback (PLAY) key, fast forward (FF) key, rewind FR) key, and stop + L (STOP) key, respectively.
One terminal of these operation keys is connected to the circuit power supply (voltage terminal V
cc), and the other terminal is connected to a GND (ground) line via resistors R1 to R4, respectively. 5 to 8 are D-type flip-flops, and the Q output of each 5 is manually inputted to a sequence control section 9, and this sequence control section 9 switches each mode of the device, such as play mode, fast forward mode, rewind mode, etc. . 10 is a drive circuit that drives a capstan (not shown), a rotating drum, etc., 11 is a signal processing circuit for video signals, audio signals, etc., 12 is a video head, 13 is a magnetic tape, 14-=17 is an AND (AND)
18 is an OR gate, 19a is a video signal input terminal, and 19b is an output terminal for a reproduced video signal. Note that this apparatus performs fast forwarding and rewinding with the magnetic tape 13 in contact with the video head 12, that is, with the magnetic tape 13 wound around a known rotating drum.

Next, we will discuss the operation. First, in the normal mode, for example, when the playback key 1 is pressed, an H signal is sent to the flip-flop 5.
A (high) level signal is manually input as a clock pulse,
The Q output of the flip-flop 5 becomes H level and is input to the input port a of the sequence control section 9. at the same time,
The flip-flop 8 is reset by the H level signal outputted from the flip-flop 5, and the stopped state is released. Then, when the human power boat a of the sequence control section 9 goes to H level due to the Q output of the flip-flop 5, the apparatus enters the playback mode, and the drive circuit 10 drives the rotating drum on which the video head 12 is mounted, the magnetic tape 13, etc. At the same time, the video signal read from the magnetic tape 13 is processed by the signal processing circuit 11,
You can see the playback screen. Similarly, when the fast forward key 2 is pressed, the input port b of the sequence control section 9 goes to H level and switches to fast forward mode, and when the rewind key 3 is pressed, the input port C goes to H level and switches to rewind mode. . When the stop key 4 is pressed, the human-powered boat d becomes H level and enters the stop mode, and the flip-flops 5 to 7 are reset. Here, the tape speed during the above-mentioned fast forward/rewind is approximately 40 times that during normal playback.

Also, when the playback key 1 is pressed and the fast forward key 2 is pressed, the output of the AND gate 15 becomes H level while the fast forward key 2 is pressed, and during that time, the manual boat e of the sequence control section 9 becomes H level, and the fast forward search mode is set. Switch to . Similarly, if you press play key 1 and rewind key 3,
While the rewind key 3 is pressed, the output of the AND gate 14 becomes H level, and during this time the human powered boat f becomes H level and switches to the rewind search mode. At this time, in these search modes, the normal search function and tape speed are approximately 10 times that of normal playback.

The normal mode has been described above, but if you press the fast forward key 2 and press the playback key 1 while the human powered boat b of the sequence control section 9 is at the H level, the output of the AND gate 16 will go to the H level. The human-powered boat G also becomes H level. When both the human-powered boats b and g reach the H level, a fast-forward display mode is entered, and the drive circuit IO controls the tape speed, drum rotation speed, etc. to, for example, about 30 times the tape speed to make the image easier to see. The signal processing circuit 11 also switches to a state in which the video signal is outputted from the terminal 19b using the reproduction signal from the reproduction head 12, and a screen display that makes it easy to search for the desired recording scene is obtained. Similarly, when rewind key 3 is pressed and then playback key 1 is pressed, the output of AND gate 17 becomes H level while the playback key 1 is pressed, and during that time, input ports C and h of sequence control section 9 both go to H level. and switches to rewind display mode.

At this time, as in the fast-forward display mode, a screen display that makes it easy to search for the desired recording scene can be obtained.

In this way, in this embodiment, in addition to the conventional normal mode, a new display mode for fast forwarding and rewinding is added, so if the fast forwarding, rewinding, and fast forwarding and rewinding display modes are used sequentially, It is possible to easily search for a desired recording scene with simple key operations. The conventional search mode has few noise bars and is very easy to see, but it takes time to search for the desired scene, and in the present invention, it is not possible to sufficiently distinguish the content like fast forwarding and rewinding of an audio device. It is possible to determine the presence or absence of recording and the contents of the large hole, and also to quickly find the desired recording scene.

Although the above embodiment uses a gate circuit, it is also possible to use a microprocessor. In this case, the number of operation keys remains the same, so the structure can be simple and low-mounted. Also, during the display mode, play key 1
Although this is assumed to be while the key is being pressed, this key operation may be locked, or another operation key may be provided.

〔Effect of the invention〕

As described above, the present invention has the advantage that a desired recording scene can be easily and quickly found by simple key operations.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention. 1.--Playback key 2-...-Fast forward key 3------ Rewind key 4------Stop key 5~8----Flip-flop 9-----Sequence control section 10-----One drive circuit 11----Signal processing circuit 12---Video head 13-・・・Magnetic tape

Claims (2)

[Claims] (1) In a device that performs fast forwarding and rewinding by bringing a magnetic tape into contact with a video head, when the fast forwarding or rewinding is being performed, the video signal played by the video head is output, and the video head is switched to a high speed playback state. A video signal reproducing device characterized by comprising an operation key. (2) The video signal reproducing apparatus according to claim 1, wherein the operation key is a reproduction key for normal reproduction.