JPS60653A - Reproducing system of animation picture - Google Patents

Abstract

PURPOSE:To realize the reproduction of an excellent animation picture not causing disturbance of picture when a frame of the animation picture is changed by providing an auxiliary track to a magnetic recording medium and an auxiliary recording and reproducing means to record and reproduce a signal on the track. CONSTITUTION:A reproduced output of main heads 2a, 2b is demodulated by selecting a contact (a) of a switch 5 at first and also tuning on a switch 9, this reproduced output is amplified by an amplifier 4 at the same time and recorded on an auxiliary track 1a by auxiliary heads 3a, 3b. When a counter 11 detects that a magnetic disc 1 is rotated twice, the switch 5 is changed over to a contact (b), the switch 9 is turned off to reproduce the still picture recorded just before from the auxiliary track 1a by using auxiliary heads 3c, 3d. While the reproduction utilizing the auxiliary track 1a is performed, the main head 2 is moved to a track where a still picture to be reproduced next is recorded. When the counter 11 detects the rotation of a prescribed number of times, the similar operation is repeated to the next track to prevent the disturbance of the reproduced picture of the main head 2 during movement.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reproduction method for animation images, and is a reproduction method for reproducing animation images by continuously reproducing a large number of still images recorded on a magnetic recording medium in +6+α order. It is useful.

In the method of recording video signals on magnetic recording media such as magnetic tapes and magnetic disks, in order to facilitate special reproduction of still images and slow motion, one field or two
One track is allocated to each field (=one frame) so that the video signals are lined up at the frame period or field period. Therefore, when a magnetic disk is used as a magnetic recording medium, the rotational speed of the magnetic disk is defined as a frame period or a field period.

On the other hand, with the recent announcement of the development of stealth photography using a magnetic recording method, the magnetic recording and reproducing method for stealth 1illii images is attracting attention. Recording and reproducing of animation images using the methyl image recording and reproducing method is also being considered and reproduced as Xl. This involves recording a large number of still images corresponding to a portion of an animation on a magnetic recording medium, especially a magnetic disk, by snapshotting a moving subject, and then repeatedly playing back the still images. The animation image is reproduced by continuously switching and reproducing at an arbitrary speed that is equal to or different from the snapshot speed.

However, the steal image i=' recorded in this way
It is generally difficult to play back 5c as a smooth animation. Basically, if you play the same track multiple times, you can move on to the next track and repeat the same process one after another. Shit, huh. That is, the magnetic recording medium has r;8
If the recorded video signal is frequency modulated, a beat will occur when the head straddles the track. In order to eliminate the occurrence of this beat, change
``Even if measures such as changing the J method are taken, depending on the continuous shooting speed, etc., the video signals recorded on each track have less picture correlation than movie images, so temporary images may be affected. It causes disturbance and disturbs it.

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, it is an object of the present invention to provide a reproduction method that can reproduce high-quality animation images without causing image distortion. The present invention achieves the above object, and the rotation speed of the magnetic disk is usually 1 track/track.
For 1 field and 2 tracks/1 frame recording,
60 times/second. On the other hand, the animation image is 6
The number of frames per second is sufficient, and therefore, in this case, the head scans the same track 10 times, focusing on the fact that the same image is generally reproduced repeatedly. When reproducing a track on which a stealth image has been formed, this reproduction signal is recorded in the auxiliary recording means, and while the recorded contents of the auxiliary recording means are being read and reproduced, the next stealth image to be reproduced is recorded. Here, when reproducing a track on which a stealth image to be reproduced is formed, the timing at which the reproduction signal is recorded in the auxiliary recording means is determined. The following can be adopted. That is, when scanning a track for the first time, a still image of the track is simultaneously recorded on the auxiliary recording means, and then the recorded contents of the auxiliary recording means are read out from the edge, and during that time, the next four occurrences are recorded. Alternatively, the head may be sent to the track where both still images are recorded, or the track where the still image to be reproduced is formed is repeatedly reproduced nine times, and then the still image to be reproduced next is recorded. It may also be possible to record the snapshots and still images of that track in one auxiliary recording means, except for the scan immediately before sending the head to the track, and read out the distribution contents of the auxiliary recording means only during the period when the head is moving between tracks. In short, it is sufficient to read out the recorded contents of the auxiliary recording means at least during the movement period of the head between tracks.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The magnetic recording medium in this embodiment is a magnetic disk.

Generally, in the NTSC system, magnetic disks are
There are two types: one that rotates at 3,600 rpm and records one track/one field, and one that rotates at 3,600 rpm and records one track/field or two tracks/one frame. This embodiment is a playback method when a stealth image is recorded, in which an animation image is formed by rotating at 3600 rpm and recording 2 tracks/1 frame. That is, as shown in FIG. On the magnetic disk 1, one frame of the image forming the entire animation image is sequentially recorded concentrically as two methyl images in two tracks/one frame.Therefore, when playing back the animation image, the magnetic disk 1 is The main head 2, which is a composite head having two heads 2a and 2b arranged in parallel in the radial direction, switches and reproduces each field. The head 2a is used for reproducing the field, and the head 2b is used for reproducing the second field corresponding to the next revolution of the shattered magnetic disk 1.Furthermore, the magnetic disk 1 of this embodiment has auxiliary tracks la, lb on its outermost circumference.
is formed. For recording on the auxiliary tracks la and lb, use the wide heads 2a and 2b and the auxiliary track la.
* For reproduction from lb, narrow heads 2c and '2dffi are used, respectively. That is, the auxiliary heads 2 fixedly occupying the auxiliary tracks la and lb are arranged in the width direction of the tracks and are integrally formed into wide rads 2a.

The welding head has four heads, 2b and 19 narrow heads 2c and 2d.The wide head 2a and the narrow head 2C are for the first field, and the wide head 2b and the narrow head 2d are for the second field. It has become.

FIG. 2 is a block diagram showing an apparatus according to an embodiment of the present invention. As shown in the figure, the main head 2 is connected to the amplifier 4.
and is connected to a reproduction processing section 6 via a switch 5. On the other hand, the narrow heads 3c and 3d of the auxiliary head 3 are also connected to the reproduction processing section 6 via the amplifier 7 and the switch 5.
ing. The wide heads 3a, 3b of the auxiliary head 3 are connected between an amplifier 4 and a switch 5 so that signals from the main head 2 can be supplied via an amplifier 8 and a switch 9. Rejuvenation store J! The n section 6 is the luminance signal Y11 of the video signal.
It reproduces the signals R-Y and B-Y, and has a demodulator compatible with the Variant 1.1 system during recording. Record of this time (
There is no special fx or limitation for one method. That is, it is sufficient to appropriately select one of two known recording methods such as the FM azimuth recording method and the PM modulation recording method. The control unit 10 controls the main head 2 based on the output signal of the counter 11 that detects the number of rotations of the magnetic disk 10.
, auxiliary head 3, switch 5.9 and position control device 12
control. That is, heads 2a, 2bS wide head 3
a r '3 b % Selection of I'Q narrow heads 3c and 3d, selection of contact a or contact s in switch 5,
When the switch 9 is turned on, the head is moved via 01i''F and the head position control device 12, and the main head 2 selects a predetermined track.

In order to reproduce an animation image using such a device, first select contact a with the switch 5 and turn on the switch 9 to demodulate the reproduction output of the main head 2.
At the same time, this playback output is amplified by amplifier 4 and auxiliary head 3
Recording is performed on the auxiliary track 1a using the wide heads 3a and 3b. At this time, when playing the first field, the head 2
A and wide head 3a are used, and head 2b and wide head 3b are used when reproducing the second field. When the counter 11 detects that the magnetic disk 1 has rotated twice, it switches the switch 5 to the contact position and also switches the switch 9 to the contact position.
is turned OFF, and the still image recorded just before is transferred from the auxiliary track 1a to the narrow heads 3c, 3 of the auxiliary head 3.
Play using de. At this time as well, the narrow head 30 is used when reproducing the first field, and the narrow head 3d is used when reproducing the 8N2 field. Auxiliary track 1
The reproduction using the full magnetic disk 1 is continued for a predetermined number of times (for example, 10 times), during which time the main head 2 is sent to the track where the still image to be reproduced next is recorded. When the counter 10 detects rotation a predetermined number of times (for example, 12 times), the same operation is repeated for the next track. By repeating this series of operations, preferred animation reproduction can be performed without any disturbance in the reproduced image while the main head 2 is moving.

FIG. 3 shows an example in which a digital memory 13 for one frame is used instead of the auxiliary track 1a of FIG. 2. The example in FIG. 2 is an A/D converter 14 and a D/A converter 1.
It is exactly the same except that 5 is used. That is, the auxiliary recording means for recording the methyl image once [1a] is transferred from the auxiliary track 1a to the digital memory 13, and the methyl image is recorded 4.1 other times (1a).
It is 1st generation. For this reason, parts in FIG. 3 that are the same as those in FIG. 2 are given the same numbers and repeated explanations will be omitted.

Note that, as in the above embodiment, the wide heads 3a, 3b
If you record with narrow-width heads 3e and 3d and play back, off-track is less likely to occur during playback, and the playback output S/
This has the advantage of improving N.

Ignoring this advantage, the auxiliary head 3 can be
The same reproduction as described above can be performed by appropriately switching the recording and reproduction modes.

The above-mentioned advantages also apply to the main head 2, and the main head 2
Of course, the same effect can be obtained by making the width narrower than the track width. The westward transfer of the still image from the auxiliary track 1a is done to secure the head feed time of the main head 2, so if this time can be secured, the switch 5 between the main head 2 and the auxiliary head 3 should be turned on. The switching of the reproduction output by switching may be performed after 5 revolutions 1] from the start of switching and scanning the two tracks of the magnetic disk.

Further, in the above embodiment, the reproduction method in the case of 2-track/1-frame recording was explained, but the present invention is of course applicable to the reproduction in the 1-track/1-field recording method and the 1-track/1-frame recording method. It is possible.

As specifically explained above in conjunction with the embodiments, according to the present invention, a. animation images can be reproduced in good quality without causing image disturbances when frames of animation images change;

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the relationship between a magnetic disk according to a first embodiment of the present invention, a 'A disk, a main head, and an auxiliary head;
The figure is a block diagram showing the device, and FIG. 3 is a block diagram showing the device according to the second embodiment of the present invention. In the drawing, 1 is a magnetic disk, 1a is an auxiliary track, 2 is a main head, 3 is an auxiliary head, 5.9 is a switch, 6 is a reproduction section, and 13 is a digital memory.

Claims (1)

[Claims] In a reproduction method that reproduces an animation image by repeatedly reproducing a large number of stealth images recorded on each track of a magnetic recording medium and sequentially and continuously reproducing a large number of still images, the first stealth image to be reproduced is When reproducing a track on which an image is formed, this reproduction signal is recorded in the auxiliary recording means, and the R of the ml auxiliary recording means is
A method for reproducing an animation image characterized in that, while reading and reproducing 3t' of 3t', the head is sent so as to scan a track in which a methyl image to be reproduced next is recorded.