JPS60179972A - Still video reproducer - Google Patents

Abstract

PURPOSE:To improve the reproduction efficiency of a picture by shifting a reproducing head to the position for reproduction of a queuing track when a reproduction starting action is detected in a loading end state of a magnetic disk or an ON state of a reproduction start switch, etc. CONSTITUTION:A jacket is loaded into its loading chamber and this loading end state is detected by a limit switch 18. Thus a step motor 12 is driven in the forward direction, and a reproducing head 7 is shifted by a shift mechanism 15 to a position where a queuing track Q is reproduced. When a limit switch 17 detects that the reproducing head 7 is shifted up to said position, the drive of the motor 12 is stopped. Then the index information is reproduced to the track Q. If no index information is recorded, the motor 12 is driven backward. Then the motor 12 is stopped when a limit switch 16 detects that the head 7 is shifted to a position where a track T of the most outer circumference is reproduced.

Description

Detailed Description of the Invention [Technical Field] A still video reproducing device for reproducing a magnetic disk having an image track on which an image 11 FIN is recorded and a cue track on which index information regarding the image recorded on each image track is recorded. ! Regarding iVc.

[Prior art]

With magnetic disks, it is not possible to tell from the outside whether image information is recorded on the disk, and conventionally, the magnetic disk was loaded and each trunk was played back by trial and error, and then image information was recorded. There are 75 things that happen.
/ri.

Even if a magnetic disk has nothing recorded on it, you won't know whether or not there are any recorded tracks until you play it all back. It took a lot of effort to determine whether the item was recorded or not.

Therefore, in recent years, one
Consideration is being given to recording index information regarding images recorded on each track, such as date, shooting location, etc.

〔the purpose〕

End] recorded the index information as described above. (h) An object of the present invention is to efficiently perform image reproduction when a magnetic disk having a so-called cue track is used for reproduction.

[Summary]

Is the present invention intended for the above purpose? To achieve this, use the still video playback device mentioned at the beginning.

A reproduction start signal generation means for generating a reproduction start signal in response to a helping operation; and a detection means for detecting whether or not index information is recorded in the cue track depending on how the sketching head is projected.

A head transfer unit that moves the playback head to a cute rack playback position in response to a playback start signal, and moves the playback head to a position where the entire outermost image track is played back when index clearing is not written in the cue rank. It is characterized by providing means.

〔Example〕

Figure @1 shows the still video playback device (1), and the loading chamber 14 of the jacket (3) containing the magnetic disk (2).
is provided, and at a predetermined location in the loading chamber (4) there is a motor (6) that drives and rotates the magnetic disk (21) and a spindle (11lli1) that is rotated by the motor.
6) and a reproducing head (7).

The magnetic disk (2) is rotatably supported by the jacket (3), and as shown in Figure @2, the jacket (3)
An opening (8) for receiving the spindle (6) is provided in the center thereof, and a slot (9) for receiving the reproducing head (7) is provided on the side facing outward from the opening (8). is provided. Also.

A protection J (Iα) is provided to open and close the slot) +91, and the jacket 13) is inserted into the space between the jacket (3) and the regeneration device [il]. When the protective lid (1α is visually damaged and the loading chamber 14) is removed, the protection @ 1lo is removed.
The slot (
9), dirt and dust may enter through the magnetic disk (
2) is configured to completely prevent accidental touching with fingers or the like.

At h on the magnetic disk (2), leave a predetermined interval in the radial direction lL! ]1 image t#*f-Ii! An image track (1) for recording is attached, and a cue track Q is attached at the innermost part for recording index information such as shooting date and time, shooting location, and various comments. .

As shown in Figure @8, the reproduction head (7) is attached to a head transfer table (11), and the head transfer table 1 is screwed onto a screw shaft 11 driven and rotated by a step motor 1121. , Guide Rondo (M in 141
The head transfer mechanism UFA is configured to be freely attached and move the magnetic disk (2) in the radial direction.

Note that h (not shown) is this head transfer table.

It is provided so as to be retracted to a position where it does not interfere with the insertion and removal of the magnetic disk (2) into and out of the loading chamber (4).

In the figure, US indicates that the playback head (7) is on the outer track (1).
), that is, when the first image □ track σ) is in the position to play, it is closed and emits the signal (J). A second limit switch is shown that is closed and emits a signal when rack Q is in the position to play.

The configuration for transporting the above-mentioned reproducing head (7) is as follows.

Various flat membranes can be adopted, including configurations using cams and screws.

Inf loading chamber +41ic, jacket (3)
At the end position in the loading direction, an eighth limit switch is attached as a sensor that issues a signal when it detects the width of the jacket (3) in the fully loaded state. As this sensor, for example, various sensors such as a proximity sensor can be used.

Next, FIG. 4 shows the basic configuration of the reproduction circuit of the still video reproduction apparatus f1+.

That is, by inputting a command signal from the microcomputer, the disk drive motor (6) is activated via the f-port system.
is rotated at a predetermined speed. In the figure, a PG head for detecting the rotational position of the 211 #i disk (2) is shown. In addition, the step motor 42) is driven by the command signal input from the microcomputer 09175A etc. via the #h circuit I"22, and the reproducing head (7) is moved in the radial direction of the magnetic disk (2) by the head transfer mechanism all51. will be transferred to.

The video signal taken out from the playback head (71) is amplified by a preamplifier, gain adjusted by an example of an auto gain adjustment circuit, and then separated into a luminance signal and a color signal.
The signal is input to the NTSC encoder via the luminance signal regeneration circuit 2υ and the color signal regeneration circuit □, respectively, and then to the RF converter □
Display devices such as monitor TV and TV via □□
The output is now 2m and it catches fish. In the diagram (a) Fi
, microcomputer 1191. This is a synchronization signal generation circuit for synchronizing the signal outputs from the color signal I+karasuo circuit and the NTSC encoder I271.

In the microcomputer 11i1, the @1
Then, with the 8th limit switch Ilυ++7) (IIc linked and Jakela) +31 in the loading chamber (4), move the playback head (7) to the cue track (
Q is moved to the playback position, the cue track - is played back, the detection circuit detects the presence or absence of index f# information on the playback Ig using υ, and control is made to perform the desired 1ft+ operation based on this. A mechanism is constructed, and its operation will be explained next.

As shown in Figure 5, the jacket (31 loading chambers (4)
When the width of the loading completion mark is detected by the $8 limit switch U (to) or the width of the loading completion mark (■), the step motor 1121 is turned in the normal feed direction (■ ), the playback head (7) is moved 41Js to the position where the cue track Q is to be played back.

It is determined whether the playback head (7) has been moved to the position where the cue track data is played back (1), and when it is detected that the playback head (7) has been moved to the playback position, the drive of the step motor is stopped ( ), and in that state, the disk drive motor (6) is driven/rotated to reproduce the index fl information for the cue track (Q) (■).

Whether index information is recorded on the cue track Q is determined by the detection J% 1311 (■), and if the index 'ii# information is recorded, the index 'I' is displayed on the second display device d. #Display the contents of the report (■). Then, if index information is not recorded, the step motor 1121E
If! It is determined whether the playback head (7) has been moved to the position where the first recording track (1) is to be played back (■), and whether the playback head (7) has been moved to the playback position of the recording track (1). When this is detected, KFi stops driving the step motor +12 (@l).

In this example, the jacket (3
), for example, to the playback start switch 1331 of the playback device 10 shown in FIG.
A sensor is provided to detect the opening/closing state, and a control mechanism is activated when the regeneration activation switch is closed, or a sensor is provided to detect when the power is turned on.

Various previous works can be used as a playback start work, such as activating a control mechanism when the power is turned on, and a playback start bias generation means is provided by using a sensor such as the @8 limit switch +181 that detects the playback start operation. (Generally referred to as l~.

! FIG. 6 shows the main part of another embodiment of the present invention.

'g Only the parts that are different from Figure IJ4 are shown.

In FIG. 6, when the playback start switch i is closed by one hand operation, the playback start detection circuit-phantom outputs a playback start signal. This signal is transmitted by the cue track instruction circuit t
421, and the cue track indicating circuit 2 outputs a signal indicating the cue track. Now, from the outward side of the trunk of the magnetic disk, number 1.2.8.
．． ...Track (Tl) (T2) (T3)... and
Tracks l to 50 tracks (Tl '') to (T (capital)) are image tracks, and track @52 (T52) is a cue track. Therefore, the cue track instruction circuit (42 receives the playback start signal and selects the 52nd track). (T52).

When the water circuit (43) receives a signal indicating this 52nd track (T52.), it outputs it as T.

Head transfer control circuit (44 is transfer trunk instruction time bV
! r (signal T of the track to which the head is to be transferred from 43)
From the track number kakunta (track signal 1 indicating the current head position it1. Controls circuit 2z.

After the head is transferred to the cue track playback position ■α, the IC
%Cue track is played. The detection circuit 1311 shown in FIG. 4 determines whether or not the index 11 information is recorded on the cue track according to the output of the playback head (7), and if it is not recorded, 1st image track instruction time bf! Output signal T1 to r++ barrel. Transfer track instruction circuit 1431Fi receives this signal T1,
This is output as a signal T of the track to which the head is to be transferred. Therefore, the head transfer control circuit receives this signal T.
No. 488 TM on the trunk showing the current position of 1 and the head
(T52 since it is the cue track playback position).
) to the first image track playback position.

Thereafter, the output of the playback track instruction circuit-η which outputs a signal 8T8e corresponding to the selected playback track is used as the signal T of the trunk to which the head is to be transferred, and the head is transferred from T and 1. The transfer direction and transfer amount are determined.

In this embodiment, the cue track instruction circuit (c), the transfer track instruction circuit (c), the head transfer control circuit -, the track number kakunta 4, the @1 image track instruction circuit 2, and the playback track instruction circuit uη are provided by a microcomputer. Become. Track numbering tool - The printer 4 counts the tracks on a magnetic disk, but if it is configured so that the head is moved to a predetermined track in conjunction with replacing the magnetic disk or turning off the power switch, it will be possible to count the tracks on the magnetic disk. It is necessary to initialize the number. Further, the structure may be such that the track number corresponding to the position of the head is stored in memory.

According to this embodiment, the glue mint switch tI shown in FIG.
By eliminating the need for φaη (181), the mechanical configuration of the device can be simplified, and the device can be made more compact.

In this embodiment, the reproduction start switch is the reproduction start signal generating means.

In the above embodiment, upon detection of playback start operation.

Step motor a21t for changing the playback position with respect to recording track (1);
7), but for example, the reproducing head (71) is moved to the magnetic disk (71) with respect to the head transfer table + Ill.
2) Attach the drive u1 so that it can be moved freely in the row direction, and
The playback head (7) may be moved by 1ffiK to play back the cue track 0) by the drive mechanism.

The still video playback device of the present invention may be of the type used only for playback, or may be of the type used for recording as well, such as an electronic still camera equipped with a monitor TV. The mechanism is that when playback starts, the playback head (7) is moved to the position where the cue track (Q) is played, and when the cue track (Q) is played back and there is no index information, the head (7) is moved to the Various modifications and configurations are possible, such as when the book is transferred to the eye image trunk and a buzzer or lamp is used to notify that the index ↑a information is missing.

〔effect〕

As described above, according to the present invention, it is possible to determine whether the loading of the magnetic disk is completed or the reproduction hoisting switch is turned on.
Ivy. As the playback start operation is detected, the playback head is moved to the position where the cue trunk is played back, and during playback,
In addition to playing the cue track first, if index information is not recorded on the cue track,
The head is t-transferred to a position for playing the outermost image trunk most suitable for playing the entire image track.

Therefore, when playing back a magnetic disk, the index information is first played back to find out whether image information has been recorded or not, so it is only necessary to play back the cue track for a magnetic disk on which no image information has been recorded. This eliminates waste when reproducing all images, and if index information is not recorded, the head is moved to a position suitable for reproducing the entire image trunk.

For magnetic disks where image information is recorded but the index information is accidentally forgotten, it is possible to efficiently reproduce the information and find out what the image information is, which improves overall performance. Image playback can now be performed more efficiently.

[Brief explanation of the drawing]

Figure @1 is a partially cutaway side view of the still video playback device, Figure 2 is a perspective view of the jacket, Figure @8 is a front view of the head transfer mechanism, Figure 4 is a circuit diagram showing the basic configuration of recycled yarn, Fifth
The figure is a flow chart of the I+J'aJ dA structure, and FIG. 6 is a circuit diagram showing the main part of another embodiment. (2)...Magnetic disk, (7)...
play head. Betting...Start of playback (means for generating aJ number. Scene 1...Playback switch, (Q...Cue track. Agent Patent attorney Osamu Kita 1L7) Whistle 2 Diagram

Claims (4)

[Claims] (1) In a still video playback device that plays back a magnetic disk that has an image trunk in which image information is recorded and a cue track in which index information regarding images recorded in eight image tracks is recorded, playback is performed in response to manual operation. A playback start signal generation means for generating a start signal, a detection means for detecting whether or not index information is recorded on the cue track in accordance with the output of the playback head, and a detection means for cueing the playback head in response to the playback start signal. A still video head transporting means for transporting the playback head to a rack playback position and to a position for playing back the outermost image track when index information ' is not recorded on the cue track. playback device. (2) The playback start signal generating means comprises a loading completion means for detecting the completion of loading the magnetic disk into the device! A still video playback device according to item +1) of the range of Fm. (3) The still video reproducing apparatus according to claim 'Jiii, wherein the reproduction start signal generating means comprises means for detecting the closing of a reproduction switch which is manually operated to start reproduction. (4) The head moving means includes means for outputting a first transfer completion signal when detecting that the playback head has been moved to the cue trunk playback position, and means for issuing a first transfer completion signal when detecting that the playback head has been moved to the outermost image track. A means for issuing a transfer completion signal of KA2 and a means for moving the playback head toward the cue track playback position in response to the playback start No. 411, and a detection means for detecting that index information is not recorded on the cue track. Then, the playback head is moved toward the playback position d of the outermost image track. The still video reproducing apparatus according to claim 1, further comprising transfer control means for stopping the transfer in response to the transfer completion signals @1 and @2.