JPH01256877A - Operation method for still video camera system - Google Patents

Abstract

PURPOSE:To quickly perform the reproducing operation by transferring and storing track information detected by a reproducer to and in a still video camera at the time of turning off the power source of the reproducer or the like. CONSTITUTION:In a system consisting of the still video camera and a reproducer 90 which can be connected to this camera, track information (data indicating field recording/frame recording, an envelope peak position, etc.,) detected at the time of the reproducing operation of the reproducer 90 is stored in a memory of the reproducer 90 in accordance with the track number. When the power source of the reproducer 90 or the still video camera in turned off, this information is transferred from the reproducer 90 to a system controller 10 and is stored in its memory. When the power source is turned on and the reproducing mode is set again thereafter, information is sent from the system controller 10 to the reproducer 90 and is stored in the memory of the reproducer 90. When an already reproduced track is designated as the track to be reproduced, the reproducer 90 uses track information of this track to perform the reproducing operation. Consequently, the demodulation processing of ID data and the peak position detection processing are unnecessary to quickly perform the reproducing processing.

Description

DETAILED DESCRIPTION OF THE INVENTION Summary of the Invention In a system comprising a still video camera and a player connectable thereto, track information (field recording/frame recording) detected when the player performs a playback operation is provided. (e.g., envelope peak position, etc.) is stored in the memory of the regenerator in correspondence with the track number.

When the power of the regenerator or the like is turned off, this track information is transferred from the regenerator to the camera and stored in the camera's memory. This track information is transferred to the regenerator again and used when the regenerator performs a reproducing operation thereafter. It can also be used for erasing operations on the camera side or on the player.

BACKGROUND OF THE INVENTION The present invention relates to a still video camera that records a still video signal representing an image of a subject captured by a solid-state image sensor on one or two predetermined tracks of a rotating magnetic recording medium having a plurality of tracks; A method of operation in a still video camera system comprising a regenerator connectable to a still video camera and reproducing signals read from one or two predetermined tracks of a magnetic recording medium; Concerning operating methods for backing up track information.

A still image of the subject taken with a still video camera.
The video signal is FM modulated and recorded on one or two predetermined tracks of the magnetic recording medium. In field recording mode, a still video signal representing one frame of image is recorded on one track.

In the frame recording mode, data is recorded over two tracks. Data called ID data is multiplexed recorded on a magnetic recording medium.

The ID data includes data indicating whether field recording or frame recording is performed, a track address (No.), and the like.

When a playback device reads out still video signals recorded on a magnetic recording medium and performs playback processing, it first reads and demodulates the multiplexed ID data, and uses that data to create a field picture or a frame. control the playback process of the video signal. This I
D data readout and demodulation processing is performed each time a still image is reproduced.

For previously played images, the ID demodulated at that time
If the data is saved and used, reproduction processing can be performed quickly.

Summary of the Invention This invention stores ID data etc. obtained by demodulating an image of a reproduced track at the time of reproduction, and can be used when reproducing an image of the same track for the first time. In particular, it is an object of the present invention to provide an operating method capable of storing the above-mentioned reproduced ID data, etc. in a still video camera system comprising a still video camera and a regenerator connectable thereto.

It is preferable that the still Φ video camera be as small and lightweight as possible. However, in order to provide the camera with a playback function, a playback device is required. In order to satisfy both of these requirements, it is desirable to separate the regenerator from the camera and to make it electrically connectable (in some cases, it can be attached to and detached from the camera).

The present invention is thus applied to a still video camera system comprising a still video camera and a player connectable thereto.

The operating method according to the present invention stores track information detected by the player in connection with playback processing in the memory of the player in correspondence with the track number, and stores track information detected by the player in connection with playback processing in the memory of the player, When the power is turned off, the track information stored in the memory of the player is transferred from the player to the still video camera and stored in the memory of the still video camera. The track information includes at least field/frame data indicating whether it is field recording or frame recording.

According to this invention, when the power of the regenerator etc. is turned off (
(Includes power off due to auto power off operation)
The track information detected by the player is transferred to the still/video camera and stored in its memory, thereby being saved. Therefore, when the power to the player is turned on and the playback operation is performed again, unless the magnetic recording medium has been replaced, the track information stored in the camera is received, and the previously played images are Previous track information can be used, there is no need for the regenerator to detect track information, and the reproducing operation can be performed quickly. Further, since this track information can be used when performing an erasing operation on the camera side or the player side, erasing operations can be quickly performed for images that have been played back.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows the system configuration of a still/video camera.

This still video camera has three controllers: system controller 10. It is controlled by the photographing control device 30 and the recording control device 70. These control devices 10
．． Each of the 30.70 is composed of a CPU (for example, a microprocessor), a memory (RAM, ROM, etc.) for storing its programs and necessary data, and necessary interface circuits. The CPU of the system control device IO is the main CPU, and controls the overall operation of the still video camera. Shooting control device 30
and the CPU of the recording control device 70 is a sub-CPU,
It operates according to commands from the main CPU. The photographing control device 30 performs control related to photographing, such as focusing, aperture, shutter speed, and zoom. Recording control device 70
controls the recording of video signals on the video floppy 1, such as driving the disk motor 3, loading/unloading the magnetic head 2, and transporting the magnetic head 2. These control devices +0.30.70 are interconnected by a plurality of serial transmission lines, and communicate at predetermined timings to be described later.

A regenerator (regeneration adapter) 90 can also be connected.

The regenerator 90 demodulates the video signal read from the video floppy disk 1, converts it into a color video signal in NTSC format, and outputs the converted signal. Regenerator 9
0 also includes a CPU 91 and memory, and this CPU 9
1 is positioned as a sub CPU for the main CPU.

A still video camera is provided with a packet that can be opened and closed. Video floppy 1 is inserted into the opened packet, and when this packet is closed, video floppy 1 is transferred to disk motor 3. Chucked onto the spindle.

The video floppy 1 has a plurality of (for example, 50) tracks (for example, track pitch Io).

μm) are provided concentrically, and depending on the shooting process, one track can contain one field (one frame) or two
An FM-modulated color video signal (including a luminance signal, a color difference signal, etc.) for one frame (one frame) is magnetically recorded on the track. The 50 tracks arranged in concentric circles on the magnetic recording surface of the video floppy 1 are numbered in order from the outermost track No. 1 to No. 50.
, is attached. The home position HP (original position or standby position) is located outside the No. 1 track, and the end position EP is located inside the No. 50 track.

The system controller IO has a power switch 16. Various mode switches 11-14. Switch input signals such as the shutter release button 15, the open/close status of the packet containing the video floppy (and the video floppy if necessary)
A detection signal from a packet switch 7 that detects the presence or absence of a floppy disk, a detection signal from a dew condensation sensor 8 that measures humidity near the location where the video floppy disk 1 is installed, and the like are input. The modes that can be set include a frame/field mode that indicates frame recording or field recording, a skip mode that creates an empty track that is not recorded on the video floppy, and an edit mode that records on an empty track. . The set mode, the track number to be recorded or erased, and other information are displayed on the liquid crystal display 21. This display 21 is connected to the system control device 10 by bus. Further, when dew condensation is detected or other abnormal conditions occur, the buzzer 22 sounds an alarm. The detection of dew condensation may be displayed on the display 21.

Power switch 1B is a push button type.

When pressed, a pulsed switch signal is input to the main CPU of the system control device 10 as an interrupt signal.

The shutter release button 15 is of a two-stage stroke type, in which the first stage of depression releases switch S1, and the second stage of further depression of the button 15 causes switch S2.
are respectively turned on. When switch S1 is turned on, disk motor 3 is driven. After this, switch S2
When turned on, photographing and recording are performed.

The imaging optical system includes a zoom lens system 31. An imaging lens system 32 for forming a subject image. Aperture 33. A beam that is deflected in order to make a part of the incident light enter the photometric element 51.
Splitter 34. It is composed of an infrared cutoff filter 35 and a shutter 36. The illuminance detection signal of the photometric element 51 is input to the photographing control device 30 via the logarithmic amplifier 52. By the shooting control device 30.

A process of calculating an aperture value and a shutter speed based on the incident light illuminance detected by the photometric element 51.

The aperture 33 is controlled based on the determined aperture value, and the shutter 36 is opened and closed based on the determined shutter speed. The aperture 33 is opened and closed by an aperture motor 48 driven by a driver 47. Aperture 33
A switch 49 is also provided for detecting the opening and closing limit positions of the opening and closing limits. Unlatching and winding of the leading and trailing curtains of the shutter 36 are performed by a shutter drive device including a shutter motor 54 driven by a driver 53. The rotation angle of the motor 54 is detected by a rotary encoder 55 and fed back to the device 30.

The color detection signal from the color sensor 61 is subjected to predetermined processing in a white balance processing circuit 62 and then input to the device 30 . This white balance data is input to the R in the variable gain amplifier circuit described later in the signal processing circuit 7I.
, G, and B signals for amplification gain control.

In order to measure the distance to the subject, an infrared light emitting diode B3 and a light receiving element 64 that receives the reflected light are provided, and a focusing processing circuit 65 indicates the distance to the subject based on the output signal of the light receiving element 64. Data is obtained. Using this data, an autofocus motor 46 is driven via a driver 45 under the control of the device 30 to perform focusing control.

Additionally, a tele to enter the degree of zoom.

In response to signals from wide switches 38 and 39, control device 30 drives zoom motor 42 via driver 41 to set a predetermined magnification.

The rotation angle of the motor 42 is detected by a rotary encoder 43 and fed back to the device 30.

At the focal plane of the imaging optical system, a solid-state electronic imaging device 37 for three primary colors is arranged, for example, a two-dimensional imaging cell array such as a COD.

The image data accumulated in the imaging device 37 when the shutter 3B is opened is read out as a serial still video signal (R, G, B) in synchronization with the vertical and horizontal synchronizing signals given from the signal processing circuit 71. and input to the signal processing circuit 71.

The signal processing circuit 71 includes an oscillation circuit, and generates and outputs a vertical reference signal VD and a reference clock signal from the output signal of the oscillation circuit. The vertical reference signal VD is supplied to the system controller 10. It is given to the photographing control device 30 and the recording control device 70, and serves as a reference for the operation timing in these devices. The reference clock signal is provided to the servo control circuit 80. As will be described later, the phase pulse PG representing the reference phase of rotation of the video floppy 1 is transmitted to the signal processing circuit 71.
System control device 10. It is provided to the recording control device 70 and the reproducing device 90. A reset signal given from the recording control device 70 adjusts the vertical reference signal VD in the signal processing circuit 71 so as to maintain a constant phase relationship with the phase pulse PG. The signal processing circuit 71 also generates vertical and horizontal synchronization signals having a constant phase relationship with the phase pulse PC.

The signal processing circuit 71 further includes a preamplification circuit and a variable gain amplification circuit (
white balance adjustment circuit) and process matrix circuit. A luminance signal Y and two color difference signals RY and BY are created in the process matrix circuit. These color difference signals R-Y and B-Y are then line-sequentialized for each IH in a line-sequentialization circuit 72. The luminance signal Y and the line-sequential color difference signal pass through a pre-emphasis circuit (path shown) and are FM-modulated in different frequency bands in FM modulation circuits 73 and 74, respectively, and then sent to a synthesis circuit 75.
is synthesized with

It is also possible to record additional information signals on tracks of the floppy disk 1. The additional information signal is an acoustic signal (
narration, etc.) and display signals (representing voices such as narration, music, etc.)
For example, it means character information). This additional information signal is input to the signal processing circuit 71 from a microphone or other input device (as shown), converted into a predetermined format, and output to the luminance signal Y line. The additional information signal S may be superimposed on the luminance signal Y, or when only this signal S is recorded on a predetermined track of the video floppy 1, it is output alone.

Furthermore, it is possible to multiplex record ID data on a video floppy. This multiplexed ID data includes an initial bit, field/frame data indicating field recording or frame recording, and track address (No.).
data, date data, and user usage data. These data are given from the system controller IO.

The signal processing circuit 71 performs D P S K (Dil'f'e
rental PhaseShil't Keyin
g) It is modulated, combined with the above-mentioned FM modulated video signal in the combining circuit 7B, and input to the recording amplifier circuit 77.

A magnetic head 2 (
The floppy disks (two floppy disks are provided at intervals adjacent to each other to enable frame recording) are supported movably in the radial direction of the video floppy 1 by their transfer drive control device, and are transferred in the same direction. controlled. The transfer drive controller includes a stepper motor 87 and its driver 86. The recording control device 70 gives instructions regarding the direction and amount of movement of the magnetic head 2 to the transfer drive control device. A home position switch 6 is also provided to detect when the magnetic head 2 has reached the home position HP, and the detection signal of this switch 6 is sent to the recording control device 7.
given to 0.

A head loading device is provided to prevent marks from being formed on the floppy disk due to the magnetic head 2 contacting the stopped video floppy disk 1 for a long period of time. This device is a head load solenoid 85
Under the control of the recording control device 70, the magnetic head 2 is operated only during recording or playback (when the video floppy 1 is rotating) or only while the power is turned on. The magnetic head 2 is displaced (advance or retreat) so that it comes into contact with the video floppy 1, and at other times leaves it away from the floppy 1.

In order to improve the contact between the magnetic head 2 and the rotating video floppy 1, a regulating plate (path shown) is provided on the opposite side of the magnetic head 2 with the video floppy 1 in between. In addition, the core of Video Floppy 1 includes:
Detect leakage magnetic flux of permanent magnet for chucking and record video
A phase detector 5 that outputs a phase detection signal when the floppy disk 1 reaches a predetermined angular position is nearby. The output detection signal of the phase detector 5 is waveform-shaped by a phase pulse generation circuit (waveform shaping circuit) 82 and outputted as a phase pulse PG. circuit 71
and is input to the recording gate circuit 78. phase pulse PG
will be generated once per rotation of the video floppy disk.

The disk motor 3 is driven by its driver 81. The rotational speed of the disk motor 3 is detected by a frequency generator 4 and output from this frequency generator 4.

A detection signal with a frequency proportional to the rotation speed of the motor 3 is input to the servo control circuit 8o. The servo control circuit 17 controls the motor 3 based on the reference clock signal input from the signal processing circuit 71 and the frequency detection signal input from the detector 4.
is controlled to rotate at a constant speed (for example, 3.80 Or, p, +n,). Also the servo control circuit 8o. The motor 3 is started and stopped in accordance with commands from the recording control device 70.

The still/video signal etc. amplified by the recording amplifier circuit 77 is input to a recording gate circuit 78 . and recording control device 7
When a recording command is given from 0.

In the field recording mode, this gate circuit 78 opens its gate at the timing of the input phase pulse PG until the next phase pulse is input. As a result, video signals and the like are applied to the magnetic head 2, and recording of still video signals and the like onto one predetermined track of the video floppy disk 1 is performed. This recording is performed only while the video floppy 1 rotates once. In the frame recording mode, gate circuit 78 opens its gate for two revolutions of video floppy 1, and the first
During the second rotation, one of the heads 2 sends the video signal of the first field to a certain track.

In the second rotation, the video signal of the second field is recorded by the other head 2 on the adjacent track.

It is also possible to reproduce video signals etc. from the video floppy disk 1 using the magnetic head 2. The FM modulated video signal etc. read from the magnetic head 2 similarly passes through a gate circuit 78 and is amplified by an amplifier circuit 77 and sent to an envelope detection circuit 8.
3 and regenerator 90. This reproduction is used for track search processing not only in the reproduction mode but also in the recording mode.

The envelope detection circuit 83 is a detection circuit that detects the envelope of the read signal of the magnetic head 2, that is, the FM modulated video signal recorded on the track of the video floppy 1, and outputs a voltage signal corresponding to the envelope. It includes an A/D (analog/digital) conversion circuit. The voltage signal representing the envelope is converted into a digital quantity by an A/D conversion circuit, and is input into the recording control device 70 into an 8-bit digital signal representing a quantization level of, for example, 25B.

The envelope detection signal is used by the recording control device 70 to determine whether a track on the video floppy 1 is unrecorded or recorded (track search processing). If the level of the detected signal does not reach a predetermined threshold level when the magnetic head 2 is moved across a track, that track is unrecorded, and if it has reached the threshold level, then The track has already been recorded.

If necessary, the envelope detection signal is also used in the recording check process. The recording check process is to check whether the recorded still/video signal has been recorded on a predetermined track using the magnetic head 2 as described above, and whether the envelope detection signal has been recorded on a predetermined track. If it is above the threshold level, it is determined that recording has taken place.

The envelope detection signal is further used in the reproduction mode to detect the center position of the signal recorded on the track to be reproduced (the peak position of the envelope detection signal). In this peak position detection process, the magnetic head 2 is moved across the track to be reproduced, the position where the envelope detection signal shows a peak is detected, and the magnetic head 2 is positioned at this peak position.

The still video camera is further equipped with a power supply circuit 110. The power supply circuit 110 includes a main power supply (battery) 11
1 and an auxiliary power source (battery) 112 are provided. Main power supply 111 provides operating power to all electrical components of the still video camera. Auxiliary power supply 112
supplies operating power to the main CPU of the system control device IO when the main power supply 111 is off (that is, the main power control switch 113 described later is off), and at this time the main CPU is in standby mode. Hence the mains! 11 and an auxiliary power source 112 are connected in parallel to the system control device 10. A main power control switch 113 is connected to the output side of the main power supply 111. This switch 113 is turned on by the system control device IO if the switch 113 is off at this time when a switch signal is input from the power switch 1B or the power switch 9B of the regenerator, and each part of the still video camera is turned on. When the system control device 10 and the regenerator 90 are connected through the voltage adjustment circuit 114, power is supplied to the regenerator 9o from the main power supply 111. Further, when the power switch 16 or the power switch 9B is pressed while the switch +13 is on and a switch signal is input to the system control device lO, the system control bag ff1l
o+: Therefore, this switch 113 is turned off, and the supply of main power to the still video camera and the player 90 is stopped. Further, when the camera or the regenerator 90 is not operated for a predetermined period of time, the main power control switch 113 is turned off by an auto power-off operation by the system control device IO.

The regenerator 90 is removably attached to the main body of the still video camera. When the regenerator 90 is attached to a still video camera, the power supply lines from the main power supply 111 and the auxiliary power supply 112, the reproduced video signal line from the recording amplifier circuit 77, the phase pulse PG line, and the serial transmission line are connected to the regenerator 90. is connected to the same line on the regenerator 90 side by a connector (not shown), and the switch signal line of the power switch 9B of the regenerator 90 is connected to the same line of the power switch 16.

In the regenerator 90, the power supplied from the power supply line of the still video camera is supplied to its sub CPU 91 via a voltage adjustment circuit 98, and is also supplied to other electrical devices within the regenerator 90 via a main power control switch 97. Supplied to components. The regenerator 90 is also provided with a push button type power switch 96. This power switch 96
The pulsed switch signal is given as an interrupt signal to the sub CPU 91, and is also given as an interrupt signal to the main CPU of the system control device IO of the still video camera. That is, two power switches 16 and 96
are connected in parallel to the system controller 10 when the regenerator 90 is installed.

As described above, the main CPU of the system controller IO is in standby mode when the main power control switch 113 is off, but is activated when an interrupt signal from the power switch is input, and turns on the switch 113. do. It also communicates with the sub CPU 91 of the regenerator 90 in order to determine whether the power switch interrupt is from the power switch IB or the power switch 9G. Power switch 9
6 is pressed, the switch interrupt by this switch 9G is also given to the sub CPU 91, so if there is an interrupt from the switch 96 when there is an inquiry regarding the power switch from the main CPU, the sub CPU 91
notifies that it is a switch 96 interrupt. In this case, the regenerator 90 is already attached to the camera. The still video camera is normally in record mode (including the skip mode, edit mode, etc. described above), but when it detects that the power switch 96 of the player 90 has been pressed,
The camera goes into playback mode. On the other hand, when the main power is off, the sub CPU 91 of the regenerator 90 is in a standby state,
It is activated by an interrupt signal from the power switch 96, turns on the main power control switch 97, and starts the operation of the regenerator 90.

Of course, a separate switch for setting the playback mode may be provided.

If the regenerator 90 is not attached to the camera, the main C
There is no response to the makeshift from the PU. Even if the regenerator 90 is attached, if the power switch 96 is not pressed, the sub CPU 91 notifies the above-mentioned timing that the power switch 96 is not pressed. As a result, the main CPU of the system control device 10 determines that the power switch 1B has been pressed, and maintains the recording mode.

The regenerator 90 is further provided with a processing circuit 99 for a still video signal input from a reproduced still video signal line of the still video camera. The processing circuit 99 includes a separation circuit for luminance signal components and color difference signal components, a field/frame conversion circuit, an FM demodulation circuit, a synchronization circuit, a DPSK demodulation circuit for ID data, etc., and reproduced still/video signals. is processed by this circuit 99 and output as an NTSC format video signal. This circuit 99 also outputs the above-mentioned additional information signal, data signal, etc.

The regenerator 90 further includes a forward switch 92 for inputting a command to move the magnetic head 2 forward by one track. Reverse switch 93 for forwarding one track in the reverse direction. There are provided an erase switch 94 for inputting a command to erase signals recorded on the video floppy 1, and a track number designation switch 95 for designating the track number on which the magnetic head 2 is to be positioned. The regenerator 90 transmits the commands from these switches to the control device 10 through communication with the system control device 10, and the control device 10 further transmits the commands to the recording control device 70 through communication to cause the commanded operation to be performed.

Next, processing related to track information will be explained. There are two types of this process. One of them is a process of saving track information detected by the regenerator 90 in connection with the reproducing process (track information table creation process in the regenerator).

The other one is a process in which track information used when recording by a still video camera is stored and used for playback processing by the playback device 90 (track information table creation process in the camera). To facilitate understanding, these processes will first be explained separately, and then the fact that the track information table created by these processes can be shared will be described.

First, the track information table creation process in the regenerator will be explained. An example of the track information table created in this process is shown in FIG. For each track number on the video floppy, this table contains data indicating whether a signal has been recorded on that track, no data indicating whether a signal has been recorded on that track, and data indicating whether the track has been played before. The reproduced data indicated by the track, the above-mentioned field/frame φ data indicating whether the track is field recording or frame recording, and peak position data indicating the peak position of the envelope of the read signal of the track are stored. Since the presence or absence of recording can also be determined from other data, the presence or absence of recording data may not necessarily be present. Whether or not the data has been reproduced can be determined from other data, so the reproduced data does not necessarily have to be present. Field/frame data is obtained by demodulating the ID data in processing circuit 99. For example, in the case of field recording, 00 is used as this data. In the case of frame recording, one frame of image data is recorded over two tracks. For example, data 01 is assigned to the two tracks, and data 10 is assigned to the inner track. Field data is not necessarily necessary if it is determined that it is a field recording if the field/frame data is other than 01 or 10 or if there is no data. Peak position data is obtained by peak position detection processing. The peak position is expressed by the distance from the home position HP, and this is expressed by the number of pulses to be applied to the step motor 8G in order to send the magnetic head from the home position HP to the peak position of the track.

Such a track information table is created during a playback operation by the playback device 90 and stored in the memory of the playback device 90. Then, the player 90 or still/video/
When the camera is powered off, it is transferred from the regenerator 90 to the system controller 10 through a serial transmission line and stored in its memory. After that, when the power is turned on and the system controller 1 enters playback mode again,
0 to the regenerator 90 and stored in the regenerator 90's memory.

In the reproducing device 90, when a track that has already been reproduced is designated as a track to be reproduced, the reproducing operation can be performed using track information regarding the track.

Therefore, there is no need to perform ID data demodulation processing or peak position detection processing, and reproduction processing can be performed quickly.

Such a track information table is different for each video conference floppy, and has meaning only for the video floppy loaded in the packet. Therefore, when the video floppy is removed from the packet, the track information tables of system controller 10 and player 90 are cleared. Removal of the video floppy from the packet may be detected based on a signal from the packet switch 7 and/or a signal from the switch that detects whether the video floppy is within the packet. Even when the main power is off and the main CPU is in a standby state, it is preferable that signals from these switches are used to once start the main CPU and memorize the fact or clear the track information table. In the former case, the track information table is cleared if there is a memory of floppy removal when the main power is turned on. Alternatively, you can mechanically memorize the packet release, etc., and when the main power is turned on, the main CPU
The track information table may be cleared when the is started.

FIG. 3 shows the processing in the regenerator 90 described above.

When the playback mode is set by pressing the power switch 9B or by using a special playback mode switch, the main CPU of the system control device 10 transfers the data from the track information table stored in its memory to the playback device 90. Therefore, the sub CPU of the regenerator 90 stores this track information table in its memory (step 10).
1).

forward switch 92 for playback operation. Reverse feed switch 93. When a track to be reproduced is designated by the track number, designation switch 95, etc. (step 104), the track information table stored in the memory of the reproducer 90 is referred to, and it is determined whether the track to be reproduced has been previously reproduced. It is checked whether there is one (step 105).
. If the track has been played before, the field/frame data and peak position data for that track are set in the table, so these data are read out and played back (or erased if erase mode is set). is performed (steps 109 and 108). Field/frame data is processed by a processing circuit 99 on the regenerator 90 side.
It is used to control field/frame switching circuits, etc. Further, on the camera side, these data are used for moving the magnetic head 2 and controlling the recording gate circuit 98. These data read from the table may be transmitted from the regenerator 90 to the system control device IO, or may also be read from the table in its memory in the system control device IO.

If the track designated as the track to be reproduced is not a regenerator, a peak position detection process is performed on the camera side under communication between the regenerator 90 and the system control device IO,
Data showing the peak position is played! It is sent to the container 90.

Also, in the processing circuit 99 of the regenerator 90, the ID data
PSK demodulation processing is performed.

Field/frame data is retrieved (step 106). These data are stored in the track information table of the regenerator 90 (step 107). A reproducing (or erasing) operation is then performed (step 108).

When the main CPU notifies that the video floppy has been ejected during such playback processing (step 1
03), the track information table in memory is cleared as described above.

Also, when the power switch 96 is pressed again (step 1
02), or immediately before the power is turned off by auto power-off processing, the track information table in the memory of the regenerator 90 is transmitted to the system control device IO, and the track information table is transmitted to the system control device IO.
(step 111). After that, the switch 97 is turned off, and the sub CPU 91 of the regenerator 90
enters standby state. The switch 113 may be turned off so that the main CPU of the camera also enters standby mode. The track information table is sent to the camera side in the same way when the power switch 16 is pressed.

Next, the track information table creation process in the camera will be explained. An example of the track information table created in this process is shown in FIG. In this table, corresponding to the track number of the video conference floppy, recording presence data indicating whether a signal is recorded on that track or not, and whether the track is field recording or frame recording. field/
Frame data is recorded. Recording presence/absence data can also be created by track search processing. Further, this recording presence/absence data may not be present.

Field/frame data is determined by the field mode or frame mode set on the still video camera.

Such a track information table can be used for still, video,
It is created by the system controller IO and stored in its memory when a recording operation is performed in the camera. Then, when the playback mode is entered, the data is transmitted to the regenerator 90 and set in its memory. The reproducer 90 refers to the transmitted track information table to determine whether the track to be reproduced is of field recording or frame recording, so that reproduction processing can be performed without demodulating ID data. can.

FIG. 5 shows the processing procedure by the system control device IO. When the main power is turned on and in recording mode,
During the recording operation of the photographed video signal onto the video floppy disk 1 (step 124), the above-mentioned track information is stored in the track information table corresponding to the track to be recorded (step 125).

When the regenerator 90 is installed and enters the replay mode as described above (step 122), the track information table in memory is transmitted from the system controller 10 to the regenerator 90 and stored in its memory (step 128). Regenerator 9
0, the track information table can be used to perform a quick playback operation as described above.

When it is detected that the video floppy has been removed,
Or if there is a memory that it was taken out (step 123
), the track information table in the memory of the system controller 10 is cleared (step 12B),
The regenerator 90 is notified of this (step 127).

Upon receiving this notification, the track information table in the memory of the regenerator 9° is also cleared.

If the power switch I6 is pressed (step 121).

The switch 113 is turned off, and the main CPU enters a standby state.

Although the track information table creation process in the regenerator and the track information table creation process in the camera have been described separately, the track information table created or used in these image processes can be shared. In this embodiment, the track information table created in the track information table creation process in the regenerator has more track information items than the table in the track information table creation process in the camera.

The table shown in FIG. 2 will be used as the shared table.

In the recording mode, this table is created or rewritten by the system control device IO on the camera side as described above (step 125 in FIG. 5). Then, when the playback mode is entered, this new table will appear on the regenerator 9.
0 and set in the memory of the regenerator 90, or a part of the table in the memory of the regenerator 90 is rewritten (step 128 in FIG. 5, step 101 in FIG. 3).
. During the playback operation, new track information (played, peak position, etc.) is added to this table (Steps 106 and 107 in Figure 3), or the track information in this table is used to perform the playback operation (this In some cases, track information can be used even if it is not a regenerator). Then, when the power is turned off, the track information table data updated in this way is transferred to the camera system control device 10 (step 11 in FIG. 3).
1) The table of the control device 10 is updated with this transferred data.

Removing and replacing the video fist floppy on the camera side,
When the attachment of a new floppy is detected (step 123 in FIG. 5), the table on the camera side is cleared (step 12G in FIG. 5).

Since this information is transmitted to the regenerator 90 (step 127 in FIG. 5), when this notification is received, the regenerator 90 also clears the track information table (steps 103 and 110 in FIG. 3).

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the system configuration of a still/video camera. FIG. 2 is a diagram showing an example of a table created in the track information table creation process in the regenerator. FIG. 3 is a flow chart showing the procedure of the same process. FIG. 4 is a diagram showing an example of a table created in the track information table creation process in the camera. FIG. 5 is a flow chart showing the procedure of the same process. 1...Video floppy. 2...Magnetic head. IO...System control device. 16, 96...Power switch. 30... Shooting control device. 70... Recording control device. 71...Signal processing circuit. 90...Regenerator. 91...Sub CPU of the regenerator. 97, 113... Main power control switch. Patent applicant: Fuji Photo Film Co., Ltd. Agent
Patent attorney Hosomichi Kato (1 other person) Figure 3 Figure 2

Claims (1)

[Claims] A still video signal of a subject image captured by a solid-state image sensor is recorded on one or two predetermined tracks of a rotating magnetic recording medium having a plurality of tracks.
A still video camera consisting of a camera and a regenerator that is connectable to the still video camera and that reproduces signals read from one or two predetermined tracks of a magnetic recording medium.
In a camera system, track information detected by the playback device in connection with playback processing is stored in the memory of the playback device in correspondence with the track number, and power-off operation of at least one of the still video camera and the playback device is performed. A method of operating a still video camera system in which track information stored in a memory of a player is transferred from the player to a still video camera and stored in the memory of the still video camera.