JPH084332B2 - Video signal recording / reproducing device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image of one screen (one field or one frame) as a concentric circular recording locus on a disk-shaped recording medium (hereinafter referred to as a disk) that is rotationally driven. The present invention relates to a video signal recording / reproducing apparatus for recording / reproducing signals, recording / reproducing sports forms such as golf swing, and analyzing the forms.

2. Description of the Related Art Conventionally, a system using a magnetic recording / reproducing device such as a TVR has been generally used as a means for analyzing sports forms such as golf swing, but in the case of a VTR, its recording capacity is too large. A system that uses a disk such as a video floppy disk because it takes a long time to select the necessary scene from the images, and the operability when analyzing the form in forward and reverse frame feed in the still state. Is often more advantageous.

Problems to be Solved by the Invention However, in a system using a disc such as a video floppy, it is possible to record, for example, up to 50 scenes per disc, so in order to record the golf swing from the beginning to the end, Since the recording interval must be long, the number of frames becomes small for a fast motion such as the moment of a shot, and sufficient analysis cannot be performed. In view of the above problems, the present invention is capable of recording a form such as a golf swing from the beginning to the end on one disc, and recording a fast-moving scene such as the moment of a shot with a sufficient number of frames. The present invention provides a recording / reproducing device for a video signal.

Means for Solving the Problems In order to solve the above problems, a video signal recording / reproducing apparatus of the present invention is a disk-shaped recording medium that is rotationally driven in phase synchronization with a vertical synchronizing signal of a video signal from the video means, Gate means for extracting a video signal of one screen from the video signal in response to the application of a gate signal, and means for sequentially recording and reproducing the video signal of one screen from the gate means on the disc-shaped recording medium as a recording track on a concentric circle. A gate interval setting means capable of setting a plurality of sets of screen intervals and the number of screens to be gated differently from each other, and respective gate interval setting means set in the gate interval setting means in accordance with a predetermined order of the plurality of sets. Means for sequentially generating a gate signal according to the gate interval and the number of screens of each set and applying it to the gate means.

Operation With the above configuration, the number of screens recorded per unit time can be changed and set sequentially, and a series of forms such as golf swings can be set from the beginning to the end on a single disc with a limited recording capacity. It is possible to capture a sufficient number of frames even for a fast-moving scene that is the center of the recording and is particularly necessary for analysis such as the moment of shot.

Embodiment One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, in which a video signal output from a video camera 1 equipped with a one-thousandth electronic shutter is displayed by a gate circuit 2 on one screen (one field or one frame). Are sequentially extracted and sequentially recorded on the recording / reproducing apparatus 5 having the disk 4 via the recording signal processing circuit 3 including an FM modulator or the like. The disk 4 is rotated in phase synchronization with the vertical synchronizing signal of the video signal, and every time the video signal of one screen is applied, the video signal of the one screen is recorded in a concentric circular locus by a conventionally known means. It is configured to be recorded sequentially.

Reference numeral 6 denotes a counter, which counts the PG output of the rotation phase detection device 7 which generates a PG output for each one rotation of the disk 4 (each vertical synchronizing signal of the video signal), and counts up to a preset number. It is configured to generate an output for each.

Reference numeral 8 denotes a gate pulse generator that generates a gate signal that gates a video signal of one screen and applies the gate signal to the gate circuit 2 each time the counter 6 outputs.

9a, 9b, and 9c set the recording mode that defines the number of recording sheets per unit time (1 sec). That is, it is the first storage means for arbitrarily setting and storing the gate interval, and it is assumed that, for example, 10 sheets, 30 sheets, and 10 sheets are recorded and set. The first storage means 9a, 9b, 9c is the set value 10 sheets, 3
According to 0 or 10 sheets, it is configured to constantly output a signal indicating the number of the PG outputs existing in the respective gate intervals, and in the case of the present embodiment, a signal indicating 6, 2, 6 Is applied to the contacts 10a, 10b, 10c of the changeover switch 10.

11a, 11b, 11c are the first storage means 9a, 9b, 9c, respectively.
Is a second storage means provided corresponding to
Recording modes set in the storage means 9a, 9b, 9c of
It is assumed that the number of recorded images at 10 sheets / second, 30 sheets / second, and 10 sheets / second is set arbitrarily, for example, 15, 30, 5, and 5 sheets are set. When the number of recorded images is set, the second storage means 11a, 11b, 11c respectively store the storage means 11a, 11b, 11c.
It is configured such that the sum total of the set number of sheets of the storage means located before 11b and 11c is automatically set. That is, in the case of the previous example, the storage means 11a has 15 sheets, and the means 11b has (15+
30) = 45 sheets and (15 + 30 + 5) = 50 sheets are set in the storage means 11c.

12 is a counter for sequentially counting the gate signals,
That is, the number of discs recorded on the disc 4 is counted. The count value of the counter 12 is the second storage means 11a, 11b, 11
When the count value of the counter 12 and the values 15, 45, 15 set in the counters match each other, an output is generated from the second storage means 11a, 11b, 11c, and the switch switching circuit 13 is applied.
Through the movable contact piece 10d of the changeover switch 10 via the contact 10a.
It is configured to sequentially switch from 10b to 10c.

Next, a series of operations of the video signal recording / reproducing apparatus having the above configuration will be described. At the start of recording, the movable contact piece 10d of the selector switch 10
Is in contact with the contact 10a, so that the counter 6 generates an output for every 6 PG signals according to the 6 set values of the first storage means 9a, and the gate pulse generator 8 gates the output. A signal is generated, and the image signal for every 6 fields is sequentially recorded in the recording / reproducing device 5. The number of recorded sheets is sequentially counted by the counter 12, and the counted value is stored in the second storage means.
When the set value of 11a reaches 15, an output is generated from the second storage means 11a, and the switch switching means 13 switches the contact piece 10d of the changeover switch 10 to the contact point 10b. In response to this switching operation, the counter 6 outputs an output for every two PG signals, and image signals are sequentially recorded in the recording / reproducing apparatus 5 at intervals of two fields. When the number of recorded sheets reaches 30 (45 sheets from the start of recording), an output is generated from the second storage means 11b, the changeover switch 10 is switched to the contact 10c, and then 6 pieces of PG output (6 fields). The image signal for each is recorded. That is, as shown in FIG. 2, in the first 1.5 seconds of the movement in which the operation is completed in 3 seconds, 15 image signals are output every 1/10 second,
30 image signals every 1/30 second for 1/1 second during the next 0.5 second
Five image signals are recorded every 0 seconds.

As described above, if the setting of the recording motes of the first storage means 9a, 9b, 9c and the setting of the number of recordings (recording time) of the second storage means 11a, 11b, 11c are made appropriate, the limited recording capacity ( 50
From the beginning to the end of the movement of the disc (s), more necessary periods can be recorded in detail and other periods roughly. Although the number of the first recording means and the number of the second recording means are each three in the embodiment, it is naturally possible to increase the number.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to record from the beginning to the end of a series of operations on a disc having a limited recording capacity, and in particular, to record in more detail during a necessary period. Since it can be used, it is effective when used for motion analysis.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a video signal recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram showing a recording timing of the apparatus. 1 ... video camera, 2 ... gate circuit, 3 ... recording signal processing circuit, 4 ... disk, 5 ... recording / reproducing device, 6
...... Counter, 7 ...... Rotary phase detector, 8 ...... Gate pulse generator, 9a, 9b, 9c ...... First storage means, 10 ...... Changeover switch, 11a, 11b, 11c ...... Second storage Means, 12 ……
Counter, 13 ... Switch switching circuit.

Claims (1)

[Claims] 1. A disk-shaped recording medium which is rotationally driven in phase synchronization with a vertical synchronizing signal of a video signal from the video means, and gate means for extracting a video signal of one screen from the video signal in response to application of the gate signal. And a means for recording / reproducing a video signal of one screen from the gate means to the disc-shaped recording medium in the form of a recording track on a concentric circle in sequence, and a plurality of sets of mutually different gated screen intervals and screen numbers can be set. Gate interval setting means, and sequentially generates a gate signal in accordance with the gate interval and the number of screens of each set set in the gate interval setting means in accordance with the order of each of the plurality of predetermined sets, to the gate means. A video signal recording / reproducing apparatus having means for applying.