JPS6362488A - Picture reproducing device - Google Patents

Abstract

PURPOSE:To enable a suitable reproduction corresponding to a photographing condition without the recognition of the photographing condition at the time of the reproduction by reading-out, at least, the data to show a consecutive photographing speed among the photographing data at the time of the reproduction and reproducing the picture based on the consecutive photographing speed. CONSTITUTION:A reproducing mode selection switch 7 is a switch to select either a normal reproducing mode or a consecutive reproducing mode, and a reproducing speed alternation switch 8 is the switch to correct the consecutive photographing speed at a recording time in the case that the consecutive photographing mode is set. The reproducing speed alternation switch 8 is made so that the reproduction is executed at the 1/2 times speed at the time of the contact A, and at the same speed as the consecutive photographing speed at the time of photographing at the time of the contact B, and at the twice speed at the time of the contact C. When a still picture, recorded by the consecutive photographing mode, is reproduced at the consecutive reproducing mode, the reproducing speed corresponding to its consecutive photographing speed is set by the reproducing speed alternation switch 8, therefore the suitable reproduction corresponding to the photographing condition can be executed in spite of the condition at the time of the reproduction.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an image reproducing device for reproducing still images recorded on a magnetic recording medium such as a magnetic disk, and particularly for automatically reproducing still images taken in continuous shooting mode. The present invention relates to an image reproducing device that has a function of searching and reproducing images.

[Background of the invention]

Recently, imaging devices such as solid-state image sensors and image pickup tubes have been combined with recording devices that use magnetic recording media such as magnetic disks, which are inexpensive and have a relatively large storage capacity, to take still images of subjects. Electronic still cameras have been developed in which images are recorded on a magnetic recording medium and images are reproduced using a separate reproduction device.

In such an electronic still camera, for example, while the shirt release button is pressed for a moving subject, the shooting speed is set for a certain period of time (for example, 103
Photographing can be performed using a continuous shooting mode in which a subject is photographed every 77 seconds and the still video signal is sequentially recorded on each track of a magnetic disk.

On the other hand, there is a desire to display a series of images recorded at one continuous shooting speed of a moving subject in the continuous shooting mode on a TV screen, for example, as a similarly moving image during playback.

Therefore, so that a series of video signals recorded at one quick-shooting speed set at the highest point in the continuous shooting mode can be played back consecutively, frame information such as the continuous shooting speed within the continuous shooting unit is provided during recording. It is conceivable to record both at the same time.

Furthermore, if the continuous shooting speed of each continuous shooting unit can be recorded at the same time, it becomes possible to perform playback at a speed related to the continuous shooting speed.

[Purpose of the invention]

The present invention was made in view of these circumstances, and
Applicable to electronic still cameras that are equipped with a function to record frame information of still images recorded on recording media such as magnetic disks, allowing for appropriate playback according to the shooting conditions without being aware of the shooting conditions during playback. The purpose of this invention is to provide an image reproducing device that is capable of reproducing images.

[Invention (already required)]

In order to achieve the above object, the present invention rotates a rotating recording medium such as a magnetic disk, moves a magnetic head in the radial direction of the rotating recording medium, and generates a video signal indicating an image recorded on each trunk. An image reproducing device for reproducing a signal including a data signal indicating photographic data such as a speed of image snapshotting, including a magnetic head transporting means for transporting a magnetic head in a radial direction of the rotary recording medium, a signal reproducing means for reproducing the signal that is being recorded; a reproduction mode selection means for selecting one of a plurality of reproduction modes including a continuous shooting reproduction mode that reproduces the signal at a reproduction speed corresponding to the continuous shooting speed; A storage means for storing photographic data including data indicating the continuous shooting speed recorded on each track of the medium, and an output from the playback mode selection means, and when the selected playback mode is the continuous shooting playback mode, the A trunk search is performed based on the output of the signal reproducing means by driving the magnetic head transport means, and the photographic data recorded on the rotating recording medium is stored in the storage means, and at least the continuous shooting speed of the photographic data is determined during reproduction. The present invention is characterized by comprising a control means for driving and controlling the magnetic head transport means so as to read out data indicated by the read data and perform reproduction based on the snapshot speed indicated by the read data.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a still image reproducing device according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the overall configuration of an image reproducing apparatus according to the present invention, in which a magnetic recording medium 10 such as a magnetic disk is removably mounted on a spindle 14 driven by a DC motor 12. In this embodiment, the magnetic disk 10 has a magnetic sheet with a diameter of approximately 50 μm, and a plurality of recording tracks, for example 50, are formed concentrically on the recording surface 16 at a pitch of approximately 100 μm, for example. In this embodiment, the signals recorded on the recording track are video No. 13 and a data signal, and the video signal is, for example, an FM video signal in which a luminance signal and a chroma signal are FM-modulated. For example, the FM video signal is a field video signal forming one field of an image recorded on one track by rask scanning.

Furthermore, the data signal is frequency-multiplexed and recorded together with the FM video signal, and the still image that is played back based on the FM video signal is set to the single-face shooting mode (for example, the shooting mode is set to end the shooting operation after each frame). Differential phase shift keying (DPSK:
Differential Phase 5hift
Keying) DPSK signal.

The DC motor 12 has a frequency generator 18 that generates an AC frequency signal, receives power from a servo circuit 20, and rotates the magnetic disk 10 at a predetermined rotational speed, for example, 360
It is servo controlled to rotate at 0 rotation/rotation chamber speed. The servo circuit 20 is connected to a control device 60 that controls the entire apparatus, and controls rotational driving and stopping of the disk 10 in response to a signal DISK.

A phase generator 22 is disposed at a predetermined position near the recording surface 16 of the magnetic disk 10, and is connected to the servo circuit 20 and the control device 60 via an amplifier 24. As a result, a timing mark formed corresponding to a predetermined position on the recording surface 16 is detected, and a magnetic transducer, that is, a magnetic head 26 is disposed on the recording surface 16 where the timing pulse PG is formed. This is support mechanism 2
This support mechanism, which is supported by It is configured so that it can be moved in both directions and any trunk on the recording surface 16 can be selected.

The magnetic head 26 may have a magnetic recording function, but in this embodiment, it has a reproduction function of detecting a video signal from a track already recorded on the recording surface 16 and converting it into a corresponding electric signal. Things are exemplified. As mentioned above, in this embodiment, the magnetic disk 10 rotates at 3600 revolutions/rotation chamber speed, so that one track's worth of video signal, that is, one field of FM modulated video signal, is transmitted to the magnetic head every one revolution (1/60 second). It will be played from 26 onwards. By demodulating this, it becomes compatible with standard color television systems such as the NTSC system.

A reproduction output 32 of the magnetic head 26 is connected to a signal processing circuit 36 and an envelope detection circuit 38 through a preamplifier 34.

This signal processing circuit 36, for example, as shown in FIG.
A video signal processing circuit that processes an FM video signal that has passed through a bypass filter (HPF) 410 that extracts an FM video signal with a frequency of approximately 300 KHz or higher from the SK signal into, for example, an NTSC system composite color video signal (TV signal). 412, a low pass filter (LPF) 414 that extracts a DPSK signal with a frequency of about 300 KHz or less;

- A DPSK regeneration circuit 416 that regenerates the DPSK signal that has passed through the bus filter 414, and a character generation circuit 418 that generates a signal indicating characters such as predetermined numbers, letters, and figures based on the DPSK signal regenerated by the DPSK regeneration circuit 416. It consists of

The video signal processing circuit 412 extracts the vertical synchronization signal VSYNC from the composite color video signal, supplies it to the control device 60, and also outputs the control signal M output from the control device 60.
Upon receiving the UTE, a muting operation is performed to turn the composite color video signal into a blank signal during the effective horizontal scanning period of the composite color video signal. This makes it possible to prevent the composite color video signal from the signal processing circuit 412 from being output from the signal output terminal 40, for example, only during the period when the signal is being output from the character generation circuit 418.

The DPSK reproduction circuit 416 outputs a reproduction signal of the DPSK signal to the control device 60, and the control device 60 outputs a control signal CHARA to the character generation circuit 418 based on this reproduction signal.
Outputs C. The character generation circuit 418 receives this control signal CHARAC.

In response to this, a character signal equivalent to a video signal for displaying a predetermined character on both sides is outputted to the signal output terminal 40.
The signal is output to a display device 41 such as a monitor TV.

The envelope detection circuit 38 detects the envelope of the FM modulated video signal recorded on the track of the recording surface 16.
This is a detection circuit that detects the voltage and outputs a voltage corresponding to the detected voltage. This is connected via an envelope amplifier 44 to an analog-to-digital converter (ΔDC) 46. ADC
46 has a quantization level of 256 in this embodiment, and outputs this to the control device 60 as 8-bit data in response to a request from the control device 60.

The control device 60 has a forward key FW5 and a reverse key RV6.
, processing for reading the states of various switches including the repeat switch 3, data key group DATA4, playback mode selection switch 6, playback speed change switch 7, and playback speed setting switch 8, and playback control of the FM video signal and DPSK signal, which will be described later. It performs tracking control, etc., and consists of a microprocessor, a memory (for example, ROM, RAM, etc.) that stores its programs and necessary data signals, and interfaces with peripheral elements, circuits, devices, etc.

In this embodiment, as described above, the input means includes a forward key FW5 for moving the magnetic throat 26 in the forward direction of the track number (for example, from the outer track to the inner track), and the magnetic head 26. Reverse key RV6 to move the magnetic head 26 in the opposite direction, forward key F to move the magnetic head 26
It is included in the DPSK signal that instructs to repeatedly move to each track where a series of still images taken in the snapshot mode among the shooting modes are recorded, in response to track movement by operating W5 or reverse key RV6. A data key group DATA4.61 is used to display the information, that is, the photographic data, in various ways on the monitor TV 41.The playback speed setting switch is used regardless of which photographing mode the still image recorded on the track of the disk 10 was taken. 9. Playback mode for selecting either normal playback mode in which playback is performed at the playback speed set by 9 or continuous shooting playback mode in which still images recorded in continuous shooting mode are played back at a playback speed corresponding to the quick-shooting speed. Mode selection switch 7
, a playback speed change switch 8 for changing the continuous shooting speed during recording during playback in the continuous shooting playback mode, and a playback speed setting switch 9 for selecting the playback speed in the normal playback mode, these being a control device. 6
Connected to 0. Further, a power switch PS2 is connected to the control device 60. The track number on which the magnetic throat 26 sent using the forward key FW5 and the forward key RV6 is located is displayed on a display 48 consisting of seven segments I-LED.

The data key group DATA4 is a DATA key group recorded in each trunk of, for example, all tracks of the magnetic disk 10.
From the PSK signal, for example, a track in which a still image shot one frame in single shooting mode is recorded and a trunk in which still images shot continuously in continuous shooting mode are recorded are identified, and the results are displayed on the monitor TV 41. It consists of a shooting mode key etc. for instructing display.

When the reproduction mode selection switch 7 is switched to the contact A side, reproduction is performed in a normal reproduction mode, and when it is switched to the contact B side, reproduction is performed in a continuous shooting reproduction mode. The playback speed change switch 8 is a switch for correcting the continuous shooting speed during recording when the continuous shooting playback mode is set. For example, when it is switched to contact A, it is switched to 1/2 speed, and it is switched to contact B. When it is switched to contact C, it is reproduced at the same speed as the continuous shooting speed during recording, and when it is further switched to contact C, it is reproduced at twice the speed.

Further, the playback speed setting switch 9 is a switch for selecting the playback speed when the normal playback mode is set, and in this embodiment, it is configured to be switchable in four stages. The control device 60 takes in each output of the playback mode selection switch 7, playback speed change switch 8, and playback speed setting switch 9, and performs processing to be described later.

In this embodiment, the step motor 30 is a four-phase drive pulse operation motor, and responds to one drive pulse by approximately 15 degrees.
It rotates. Therefore, it makes one rotation with 24 pulses.

The head support mechanism 28 moves the head 26 approximately 4.2 μm in the direction of arrow R with one pulse supplied to the step motor 30.
configured to be transported. The excitation time for one pulse is, for example, about 2 to 3 milliseconds. Therefore, the head 26 is moved approximately 100 μm in 24 pulses.

The drive pulses are supplied from a drive circuit 50 consisting of a current amplifier, which generates excitation coil drive pulses for the step motor 30 according to an excitation pattern instructed by the control device 60.

The control device 60 and the servo circuit 20 are connected to a reference generator (O3C
) 62 generates a reference clock. In this embodiment, the servo circuit 20 has a frequency of 60 H, which is the same as the field frequency of the rask scan video signal recorded on the magnetic disk 10.
The control device 60 is supplied with a high-speed clock signal of, for example, 3.58 MHz.

FIG. 3 shows a magnetic disk pack 200 used in this embodiment. It has 222. A circular opening 226 is provided approximately in the center thereof, and the hub or core at the center of the magnetic disk 10 can be exposed through the circular opening 226. A magnetic body 214 that excites the coil 22 of the phase generator is formed in a part of the core 212 .

When the magnetic disk pack 200 is attached to the still image reproduction device 100, the tip of the spindle 14 is connected to the core 212.
The magnetic disk 10 can be rotated within the magnetic disk pack 200 by rotating the magnetic disk 10 .

The magnetic disk pack 200 is provided with a shutter 230 that is movable in a direction parallel to one side of the magnetic disk pack 200, as shown by an arrow 228. When the shutter 230 is moved to a position opposite to that shown in the figure, the opening of the casing 222 underneath is exposed, allowing the regulation plate 64 and the magnetic head 26 to be brought close to or in contact with the magnetic disk 10.

As shown in FIG. 4A, the magnetic disk pack 200 containing the magnetic disk 10 is inserted into the packet 102 for loading into the apparatus. packet 10
2 removably accommodates and holds the magnetic disk pack 200, and is supported rotatably about the intersection 104 by the casing of the apparatus. Normally, the magnetic disk pack 200 is biased in a direction opposite to the arrow by the biasing means 106, and the magnetic disk pack 200 can be removed from the bucket l-102 at the position shown in FIG. 4A.

When the magnetic disk puncture 200 is inserted and the packet 102 is pushed in the direction of arrow A, the engaging member 108 is moved in response to this, and as shown in FIG. 4B, it moves in the direction of arrow C around the fulcrum 1)0. It slides on one side 1) 6 of the arm 1) 2 which is rotated by being biased by the arrow B, and moves to the position indicated by the dotted line 108a. When you release your hand from the bucket 102, the bucket 102 is set at the normal loading position by the biasing pressure of the biasing means 106, and the engaging member 108 is inserted into the retainer 1) 14 at the tip of the arm 1) 2. is accommodated in and engaged with. At this time, the spindle 14 correctly chucks the core 212 of the magnetic disk 10.

In this state, the pressing part 1) 8 at the other end of the arm 1) 2 presses the protrusion 128 of the normally open contact 120, closing it. In other words, the contacts 120 are configured to close only when the bucket 102 is in a properly loaded state. The output terminal 132 of the contact 120 is connected to the control device 60 as shown in FIG. 1, and the control device 60 can thereby detect whether the magnetic disk pack 200 has been loaded normally. In this way, the contact 120
Configure the load switch shown in the figure.

Furthermore, an opening 122 is provided at the bottom of the bucket 102 as shown by the dotted line. Therefore, when the bucket 102 comes to the normal loading position, the protrusion 1 of the normally open contact 124
26 enters the opening 122, and the magnetic disk pack 2
00, this is pushed and closes the contact 124. If the magnetic disk pack 200 is not properly inserted into the packet 102, the contacts 124 will not close. The output terminal 132 of the contact 124 is connected to the control device 60 as shown in FIG. 1, so that the control device 60 can detect the presence or absence of the magnetic disk back 200. The contact 124 thus constitutes the back switch shown in FIG. 1. Next, the transfer mechanism of the magnetic head 26 will be described with reference to FIG. 6.

As shown in the figure, a head carrier nozzle 314 is slidably disposed on the main body 320 of the apparatus. That is, the head carriage 314 includes a magnetic head 26 for writing or reading information on the magnetic disk 10 in the magnetic disk back 222, and a guide bar 3 fixed to the main body 320 of the apparatus.
It is slidable along 18. stepping motor 30
The rotational force is transmitted to the head carriage 314 via a gear reduction mechanism and a rotation-linear motion conversion mechanism, which will be described below.
The head carriage 314 is slightly moved.

First, the gear reduction mechanism will be explained. A gear 300 is provided on the output shaft of the stepping motor 30. This gear 300 includes a fan-shaped gear 30 that has a shaft 326 as its center of rotation.
It meshes with 2.

Next, the rotation-linear motion conversion mechanism will be explained. A pulley 304 is formed on the fan-shaped gear 302, and this pulley 30
4, a steel belt 308 is attached by winding α. The upper right end of the Uchi steel belt 308 in FIG.
16, and a steel belt 308 is attached to the pulley 304.
After wrapping it once, it is fixed to the left end of the side surface 316 with a screw 310. The steel belt 308 is further screwed with 30 screws.
6 is fixed to a pulley 304 that is integral with the sector gear 302. Therefore, when the gear 300 rotates, the fan-shaped gear 302
The head carriage 3 rotates accordingly, and the head carriage 3
14 is connected to the sector gear 300 via a steel belt 308, so that the amount of rotational movement of the sector gear 300 is converted into a linear movement amount and moves.

In addition, 324 is H-P which is the base t% starting point of the magnetic head 26.
(Home position) switch 12 is magnetic disk 1
A DC motor rotates 0, and 14 is its output shaft.

In this embodiment, each track of the magnetic disk 10 has a fifth track.
As shown in the figure, fish 1 to floor 50 in order from the outside.
A trunk lock is attached. The original return position HP of the magnetic head 26 is the outermost track No. 1.
It is set to be further outside than the Track selection or tracking control is carried out by counting the number of tracks, ie, the number of envelope peaks, with this reference position, ie, the original return position HP, as a reference. The magnetic head 26 is connected to the magnetic disk 10
It is determined by the control device 60 based on the detection output of the home position switch 324 that the original return position HP has been reached.

Tracking by mountain climbing control is performed as follows. First, assume that the magnetic head 26 is already on an existing track. When the key FW5 or RV6 is operated, the control device 60 causes the step motor 30 to be activated by the drive circuit 50.
is activated to move the magnetic head 26 in the forward or reverse direction.

In this embodiment, the magnetic head 26 is first moved at a distance slightly shorter than the inter-track pitch 100, 171)+, for example, 2
It is transferred for 3 pulses, approximately 96 μm, in the forward or reverse direction. At that time, the envelope of the signal read by the magnetic head 26 is detected by the detection circuit 38, and the ADC 4
6 to the control device 60 in the form of digital data. Therefore, the control device 60 further moves the magnetic head 26 by one pulse, and compares the level of the envelope of the signal detected from the magnetic head 26 at this time with that of the previous envelope.

In this way, while the magnetic head 26 is being transferred, the control device 60
In each case, the detection ratio of the envelope frequency is increased to 1'Q, and the position of the envelope peak is determined. The head position where this peak is detected is the position where the head is correctly on-track to that track. In this way, the control device 60
performs mountain climbing tracking.

In order to quickly on-track to a regular track position in such hill-climbing tracking, it is desirable to return the magnetic head 26 to the original return position HP at least before the start of trunking.

Next, FIG. 7 shows the contents of the program executed by the control device 60. In the figure, when the program is started, it is determined in step 500 whether or not the magnetic disk pack 200 has been properly loaded into the packet 102. If the magnetic disk pack 200 has not been loaded yet, the same determination is made. Manipulation, magnetic disk pack 200
If it is loaded normally, the process moves to step 501. In step 501, it is determined whether the playback mode is normal playback mode, and if it is normal playback mode, playback is performed in step 502 according to the playback speed selected with playback speed setting switch 9, and this program Terminates execution.

On the other hand, if it is determined in step 501 that the playback mode is continuous shooting mode, a track search of the magnetic disk 10 is performed in step 503, and the continuous shooting speed of a series of continuous shooting frames recorded in continuous shooting mode is determined. read out, step 5
At 04, the contents are stored in the RAM in the control device 60. Next, in step 505, the magnetic head 26 is moved by one track by a drive pulse supplied from the control device 60 to the step motor 30 via the drive circuit 50.
The process moves to step 506. In step 506, it is determined whether the track search has been completed from the 1st track to the 50th track. If the trunk search has not been completed up to the 50th track, step 506 is performed.
The processes from 3 to 506 are repeatedly executed, and finally the 50th process is executed.
When the track search is completed up to the track, the process moves to step 507.

In step 507, the continuous shooting speed data stored in the RAM in step 504 is read out, and further the switch power of the playback speed change switch 8 is read out, and the continuous shooting speed data is corrected based on the read data of the switch 8,
The playback speed is set (steps 5081 and 509).
). That is, for example, in the continuous shooting playback mode, if the playback speed change switch 8 is set to 1/2 speed, that is, contact A, the speed is 1/2 of the speed indicated by the speed data read out in step 507. The playback speed is set so that the playback speed is set. The reproduction speed is thus set, and a reproduction operation is performed in step 510.Furthermore, in step 51), the magnetic head 26 is moved by one track.

Through this series of processing, playback in the continuous shooting playback mode is executed, and if this playback is completed up to the 50th track, which is the final trunk, the execution of this program is terminated; otherwise, the process returns to step 507. The process returns to , and the same process as described above is repeated.

〔Effect of the invention〕

As explained above, in the image reproducing device according to the present invention,
When the selected playback mode is a continuous shooting playback mode, a track search is performed, and the shooting data recorded on the rotating recording medium is stored in the storage means, and at least data indicating the continuous shooting speed of the shooting data is stored during playback. Since the present invention is configured to read data and perform playback based on the continuous shooting speed indicated by the read data, the present invention enables appropriate playback according to the shooting condition without being aware of the shooting conditions during playback. becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the image reproducing device according to the present invention, FIG. 2 is a block diagram showing the specific configuration of the signal processing circuit of the image reproducing device shown in FIG. 1, and FIG. The figure is a perspective view showing an example of a magnetic disk pack that can be used in the device shown in FIG. An explanatory diagram showing an example of a track arrangement on a magnetic disk applied to an image reproducing device, FIG. 6 is a plan view showing a magnetic head transport mechanism of an image reproducing device applied to the present invention, and FIG. 3 is a flowchart showing the contents of a program executed by a control device. 2...Power switch, 3...Repeat switch 7
H, 4...Data key group, 5...Forward key,
6... Reverse feed key, 7... Playback mode selection switch, 8... Playback speed change switch, 9... Playback speed setting switch, 10... Magnetic disk, 1
2... DC motor, 26... Magnetic head,
30...Step motor, 36...Signal processing circuit, 38...Enthrope detection circuit, 60...
Control device.

Claims (2)

[Claims] (1) A rotating recording medium such as a magnetic disk is driven to rotate, and a magnetic head is moved in the radial direction of the rotating recording medium to capture a video signal indicating an image recorded on each track and the continuous shooting speed of the image. An image reproducing device for reproducing a signal including a data signal representing data, including a magnetic head transporting means for transporting a magnetic head in a radial direction of the rotary recording medium, and a signal for reproducing a signal recorded on the rotary recording medium. playback means; playback mode selection means for selecting one of a plurality of playback modes including a continuous shooting playback mode that performs playback at a playback speed corresponding to the continuous shooting speed; a storage means for storing photographic data including data indicating a continuous shooting speed; and a playback mode selection means; performs a track search based on the output of the signal reproducing means, stores the photographic data recorded on the rotating recording medium in the storage means, reads out at least data indicating the continuous shooting speed from among the photographic data at the time of reproduction; An image reproducing apparatus comprising: a control means for driving and controlling the magnetic head transport means so as to perform reproduction based on a continuous shooting speed indicated by read data. (2) Claim (1) characterized in that a playback speed changing means is added for changing the continuous shooting speed indicated by the data read from the storage means during playback in the continuous shooting playback mode. The image reproduction device described in .