JPH03212857A - Recording information reproducing device - Google Patents

Abstract

PURPOSE:To effectively perform an interval reproducing mode for automatically reproducing tracks in turn on a recording medium at intervals of a prescribed time by automatically releasing an automatic shut-off mechanism from its function when the interval reproducing mode is selected. CONSTITUTION:When a reproducing mode selecting switch 54 is at an L-level and under the interval reproducing mode, whether an interval timer 47 is overflow or not is then detected, and if it is not overflow, the detecting operation is shifted to a power switch 51 after reset start operations of a medium protection timer 46 and the interval timer 47. In the case of an overflow, a magnetic head 21 is moved to the next track, and at the me time, the reset start operations of the medium protection timer 46 and the interval timer 47 are performed to reproduce this track. That is, the automatic shut-off mechanism for shutting a power source automatically when the continuous reproducing time on the same track is passed in a fixed time should not be worked. By this method, the interval reproducing mode can effectively be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recorded information reproducing apparatus that reproduces recorded information by bringing a reproducing head close to or in contact with a recording medium having a plurality of tracks.

(Prior Art) Conventionally, it has been possible to capture an image of a subject using an imaging device in response to a shirt release, record it on a floppy disk, and reproduce the recorded image information for viewing on an ordinary television receiver. Proposals have been made for electronic cameras that allow the recording of video data, as well as playback machines that load a Flo Novii disk recorded with an electronic camera and display the image on a television receiver.

In this type of recorded information reproducing apparatus, the recorded information is reproduced by rotating the Flo Novii disk at high speed, for example, 3600 rpm, and bringing the magnetic head close to or in contact with it, so if the same track is reproduced continuously for a long time, the There is a problem in that the medium characteristics of the media deteriorate and the reproduced image quality deteriorates. For this reason, in general, an auto-shutoff mechanism is provided to automatically cut off the power when the continuous playback time of the same track has elapsed for a certain period of time to protect the recording medium.

In addition, in the above-mentioned electronic cameras and their playback devices, the playback modes include a single-frame playback mode in which any track on a Fronbi disk is selected and played back, and an interval playback mode in which successive tracks are automatically played back at predetermined time intervals. The recording information is reproduced by selecting one of the modes.

[Problem to be solved by the invention]

However, in the conventional recorded information reproducing apparatus described above, the auto shunt-off mechanism operates even when the interval reproduction mode is selected. For this reason, for example, when a demonstration is being performed using the interval playback mode at a store, the auto shut-off mechanism is activated and the power is turned off, resulting in the problem that the desired interval playback cannot be performed, as well as creating a sense of distrust among customers. There is a problem in that it reduces purchasing motivation.

The present invention has been made in view of these conventional problems, and it has been developed to provide an appropriate method for effectively performing an interval playback mode in which sequential tracks on a recording medium are automatically played back at predetermined time intervals. The object of the present invention is to provide a recorded information reproducing device configured as described above.

[Means and operations for solving the problem] In order to achieve the above object, the present invention provides a reproducing head that reads information by being brought close to or in contact with a recording medium having a plurality of tracks; It has an auto shut-off mechanism that automatically shuts off the power when the playback time has elapsed for a certain period of time, and has a single-frame playback mode that plays back any track on the recording medium and automatically plays successive tracks at predetermined time intervals. The recorded information reproducing apparatus is configured to reproduce recorded information by selecting one of interval reproduction modes for reproducing the recorded information, and the automatic shutoff mechanism is automatically canceled when the interval reproduction mode is selected. do.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention.

This example shows an electronic camera, including a photographic lens and a CC
The imaging unit 11 having a solid-state imaging device such as D generates a luminance signal Y and color difference signals that appear line-sequentially, that is, a R-Y signal and a B-Y signal, and these signals are sent to an input switching circuit 12. supply to. When the electronic camera is connected to an external device, this manual switching circuit 12
The luminance signal Y, color difference signal R-Y signal, and B-Y signal supplied to the input terminals 13 and 14 from the video signal output terminal of the external device are also supplied, and this input switching circuit 12 is controlled by the system controller 15! 11? 1. Select one of the video signals from the expanded image section 11 and the external device.

The video signal selected by the input switching circuit 12 is supplied to the FM modulation circuit 16 for frequency modulation, and then supplied to the mixer 17, where information regarding the frame of the video signal to be recorded supplied from the system controller 15 is input. DPSK modulation circuit (Differential Phase 5h
The control information signals obtained by modulating the control information signals (ift and eyeing) 18 are combined to generate a frequency-multiplexed signal.

Information regarding this frame includes, for example, field recording or frame recording identification code, track number to be recorded, date information, and the like.

The output signal of this mixer 17 is amplified to a predetermined level in a recording circuit 19 and subjected to predetermined processing, and then supplied to a magnetic head 21 via a recording/reproduction switch 20 controlled by a system controller 15. The data is recorded on a predetermined track of a magnetic recording medium, that is, a floppy disk 22. Therefore, the track of the floppy disk 22 has the mixer 17 as described above.
, the luminance signal Y and the color difference signal RY or B-
Since Y and the information signal are mixed, they are recorded in a frequency multiplexed relationship.

The magnetic head 21 accesses a predetermined track of the floppy disk 22 by a head access mechanism 23 connected to the system controller 15. Further, the floppy disk 22 is driven by a spindle motor 25 which is driven and controlled by a spindle motor drive circuit 24 connected to the system controller 15.
It is rotated at a speed of 00 PPM. In this manner, one frame of the video signal can be recorded on a predetermined track of the floppy disk 22. In this case, in field recording, one field of image signals is recorded on one track, and in frame recording, one frame of image signals is recorded using two tracks. In this example, field recording will be performed, and the floppy disk 2
2, 50 still images can be recorded from the first track to the 50th track.

Next, the playback function will be explained.

For reproduction, the recording/reproduction changeover switch 20 is switched to the reproduction side by the system controller 15 in response to the user's operation on the operation unit 26.

In addition, the floppy disk 22 is transferred to the spindle motor 2.
5, and the head access mechanism 2
3, the magnetic head 21 is accessed to a predetermined track.

A frequency multiplexed signal read by the magnetic head 21, that is, a luminance signal Y, and a color difference signal R appearing line-sequentially.
-Y or B-Y and the control information signal, i.e. DPSK.
The data is supplied to the reproducing circuit 27 via the switch 20. In the reproducing circuit 27, the envelope of the reproduced signal is digitally converted and supplied to the system controller 15, thereby making it possible to detect the presence or absence of recording.

That is, if this envelope signal is not present, it is determined that no signal is recorded on the track; on the other hand, if an envelope is present, the reproduced signal is supplied to the eye demodulation circuit 28 and the DPSK demodulation circuit 29.

In the FM demodulation circuit 28, the reproduced RF signal is demodulated to obtain a luminance signal Y and a RY signal or a BY signal, and these are supplied to the reproduction process circuit 3o. Also, DPS
In the K demodulation circuit 29, the frequency 13f in the reproduced RF signal)
SK for the carrier l (fH is the horizontal scanning frequency)
The modulated control information data is demodulated, and the demodulated control data signal is supplied to the system controller 15. This control data includes an identification code for field recording/frame recording, and the system controller 15 controls related circuits in accordance with this identification code.

Recording and reproducing of control information data in a PS using a modulation method is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-219853.

The reproduction process circuit 30 receives the reproduction luminance signal Y from the FM demodulation circuit 28 and the line-sequential reproduction color difference signal (R-Y/B
- Y) is subjected to skew correction and dropout compensation processing, and the color difference signals are further subjected to simultaneous processing and encoding processing (3,58M). (processing to obtain a signal modulated by) to obtain a reproduced luminance signal Y and a reproduced color difference signal (color signal C encoded after being synchronized).
are supplied to mixers 31a and 31b, respectively.

The mixers 31a and 31b are supplied with character signals at appropriate timing from a character generator 32 controlled by the system controller 5, and are superimposed on the reproduced luminance signal Y and the reproduced color difference signal C, respectively. The output of 31b is supplied to output terminals 33 and 34 connected to external devices. Note that the character to be superimposed is specified by an operation on the operation unit 26.

Furthermore, the reproduced luminance signal Y and the reproduced color difference signal C output from these mixers 31a and 31b are mixed in a mixer 35 to obtain an N'TSC decoded video signal, which is supplied to an external output terminal 36. Through this external output terminal 36, a color image can be reproduced on a television monitor or a color print can be created with a color printer.

The system controller 15 is also provided with a serial communication signal line 37 that is connected to a system controller (CPU) of an external device such as a reproduction processor. This serial communication signal line 37 includes a serial data out (SDO) line 38 that supplies serial data from the system controller 15 to the CPU of the external device, and a serial data out (SDO) line 38 that supplies serial data from the CPLI of the external device to the system controller 15. In (SDI)
Clock (CLK) that supplies the clock from line 39 and system controller 15 to the CPU of the external device
It has lines 40 and is connected to external connection terminals 41, 42 and 43, respectively.

A display unit 44 is also connected to the system controller 15, and displays the above-mentioned operation modes and the magnetic head 2.
The track number of the floppy disk 22 that No. 1 is accessing is displayed.

Furthermore, a power supply section 4 for supplying power to each section mentioned above.
5 is provided, and its on/off is controlled by the system controller 15.
control.

FIG. 2 shows an example of the configuration of the system controller 15 and the operation section 26 shown in FIG. 1.

In addition to the function of controlling the operation of each part mentioned above, the system controller 15 also has a function to control the operation of the floppy disk in playback mode.
A time period (for example, 5 minutes) for operating an auto-shutoff mechanism that automatically turns off the power supply section 45 when the continuous playback time of the same track on the disk 22 has elapsed for a certain period of time.
A medium protection timer 46 is provided for setting the floppy disk 22, and an interval timer 47 is provided for setting the time interval (for example, 10 seconds) when sequential tracks of the floppy disk 22 are automatically played back.

The operation section 26 also includes a power switch 51 for turning the power supply section 45 on and off, a mortar switch 52 for setting the recording/playback mode, a trigger switch 53 operated by the shutter release, and a frame playback mode. A playback mode selection switch 54 for selecting between and interval playback mode and a frame advance switch 55 for advancing the reproduced image frame by frame are provided. Here, the power switch 51, trigger switch 53, and frame advance switch 55 are configured as normally open switches, and in the open state, a high (H) level signal is supplied to the system controller 15, and the mode switch 52 is configured as a normally open switch. mode(
The system controller 15 is configured to supply an H level signal in R) and a low (L) level signal in playback mode (P). Further, the playback mode selection switch 54 is configured to supply the system controller 15 with an H level signal in the single frame playback mode (S) and an L level signal in the interval playback mode (C).

Next, the operation of this embodiment will be explained with reference to the flowchart shown in FIG.

First, it is detected whether or not the power switch 51 is pressed, that is, whether the power switch 51 is at the L level. If it is at the L level, then the state of the mode switch 52 is detected, and the mode is set. When the switch 52 is at the L level, the recording/playback selector switch 20 is set to the playback side (P
) to perform playback mode operation, and when mode switch 52 is at H level, record/playback changeover switch 20 is connected to the recording side (R) to perform record mode operation.

The reproduction mode operation will be explained in detail below.

In the playback mode operation, first the spindle motor 25
After rotating the magnetic head 21, the first track of the Freonbi disk 22 is accessed.

Next, the medium protection timer 46 and the interval timer 4
After each of the power switches 7 and 7 is reset and started, it is detected whether the power switch 51 is at the L level or not. Here, when the power switch 51 is at the L level, it is assumed that the off operation has been performed, and the power of the power supply section 45 is turned off to turn off the spindle motor 25, and the process returns to the beginning; when the power switch 51 is at the H level, Next, the state of the mode switch 52 is detected, and when it is at the F (level), it shifts to recording mode operation, and when it is at the L level, the frame advance switch 55 is next pressed and whether it is at the L level or not. to detect whether

When the frame feed switch 55 is at the L level, the next floppy disk 22 being read by the magnetic head 21
detecting whether the current track is the 50th track;
When it is the 50th track, the magnetic head 21 accesses the first track and the above operation is repeated, and when it is not the 50th track, the magnetic head 21 is advanced by one track,
Thereafter, the process shifts to the reset start operation of the medium protection timer 46 and interval timer 47 described above. On the other hand, if the frame advance switch 55 is not pressed and is at the H level, then it is detected whether the reproduction mode selection switch 54 is at the L level, that is, in the interval reproduction mode.

Here, when the playback mode selection switch 54 is at the L level and in the interval playback mode, it is next detected whether or not the interval timer 47 is overflowing, and if it is not overflowing, the medium protection timer 46 and the interval timer 47 are reset. After the start operation, the power switch 51 moves to a detection operation, and in the event of an overflow, the magnetic head 21 is moved to the next track after detecting whether or not the currently read track is the 50th track. The protection timer 46 and the interval timer 47 are reset and started to reproduce the current 8-track. In this interval playback mode, when the frame feed switch 55 is pressed, the magnetic head 21 is moved to the next track after similarly detecting whether or not the current track is the 50th track, and the magnetic head 21 is moved to the next track. The protection timer 46 and interval timer 47 are reset and started to reproduce the track.

On the other hand, when the playback mode selection switch 54 is at the H level and is in the single frame playback mode, the medium protection timer 46
detects whether or not there is an overflow, and if it is not an overflow, the process shifts to the detection operation of the power switch 51 after the reset start operation of the medium protection timer 46 and the interval timer 47 described above, and in the case of an overflow, the spindle motor 25 is stopped at that point. Turn off the power of the power supply section 45 and return to the beginning.

In this way, by disabling the overflow detection operation of the medium protection timer 46 in the interval playback mode and activating the auto-shutoff mechanism only in the frame playback mode, for example, a demonstration in the interval playback mode at a store can be performed. It is possible to effectively prevent the power from being turned off undesirably during the process, and therefore it is also possible to effectively solve the problem of giving customers a sense of distrust and reducing their desire to purchase.

On the other hand, in the recording mode operation when the mode switch 52 is at the H level, the recording/playback selector switch 20 is connected to the recording side (R), and the image capturing unit 11 captures a subject image by operating the trigger switch 53 by operating the shutter release. When an external device is connected to the electronic camera, image information inputted to the input terminals 13 and 14 by operation from the external device is recorded on the Fronbi disk 22.

Note that this invention is not limited only to the embodiments described above, and numerous modifications and changes are possible. For example, in the above-described embodiment, the frame advance switch is enabled even in the interval playback mode, but it can also be disabled in the interval playback mode. Furthermore, this invention is not limited to the above-mentioned electronic camera;
For example, it can be effectively applied to a player that plays back floppy disks recorded with an electronic camera, and
The reproduction method is not limited to the magnetic method, but can also be effectively applied to, for example, the VHD method.

[Effect of the Invention 1] As described above, according to the present invention, when the interval playback mode in which sequential tracks on a recording medium are automatically played back at predetermined time intervals is selected, the continuous playback time of the same track is Since the auto-shutoff mechanism that automatically shuts off the power after a certain period of time is disabled, the interval playback mode can be used effectively. Therefore, the power will not turn off undesirably during a demonstration in the interval playback mode at a store, for example, and the problem of causing distrust to customers and reducing their desire to purchase can be effectively solved. can.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an example of an electronic camera that implements the present invention, FIG. 2 is a diagram showing the configuration of an example of the system controller and operation section shown in FIG. 1, and FIG. 3 is similar to FIG. 1. 3 is a flowchart for explaining the operation of the electronic camera shown in FIG. 11-Imaging section 12.-Manual switching circuit 1
3, 14 - Input terminal work 5 - System controller 1f3 - FM modulation circuit 17 - Mixer 18 -
-DPSK modulation circuit 19-Recording circuit 20-Recording
Reproduction changeover switch 21 - Magnetic head 22 - Floppy disk 23 - Node access mechanism 24 Spindle motor drive circuit 25 - Spindle motor 26 - Operation section 27 - Reproduction circuit 28 - FM demodulation circuit 29 - DPSK demodulation circuit 30 - Reproduction Process circuits 31a, 31b,
35 - Tuning device 32 - Character generator 33. 34 - Output terminal 36 - External output terminal 37
- Serial communication signal line 38-5DO line 39-3DI line 40
--- CLK line 41, 42.43 -- Connection terminal 45 -- Power supply section 46 -- Medium protection timer 47 -- Interval timer 51 -- Power switch 52 -- Mode switch 5
3-Trigger switch 54...-Playback mode selection switch 55-Frame advance switch

Claims (1)

[Claims] 1. A playback head that reads information by coming close to or in contact with a recording medium having multiple tracks, and an auto-shutoff mechanism that automatically shuts off the power when the continuous playback time of the same track on the recording medium has elapsed for a certain period of time. The recording information is reproduced by selecting one of a single-frame reproduction mode in which an arbitrary track of the recording medium is reproduced and an interval reproduction mode in which sequential tracks are automatically reproduced at predetermined time intervals. In the recorded information reproducing device,
A recorded information reproducing apparatus characterized in that the automatic shutoff mechanism is automatically canceled when the interval reproduction mode is selected.