JPH01312775A - Still video camera - Google Patents

Abstract

PURPOSE:To perform control concerning the propriety of recording in accordance with a set recording mode by providing a means for deciding whether a track where recording can be performed in the set mode exists and a means for displaying results decided by a deciding means and information on the track where recording can be performed if recording can be possible. CONSTITUTION:When a frame mode is set, whether at least tracks No.48-No.50 are unrecorded is examined so as to progress to the processing at the time when recording is possible or impossible. At the time of completing the processing for deciding the propriety of recording, content stored in a memory is read out so as to decide whether recording is possible or not. When the stored content that recording is impossible exists, the processing for counting the number of unrecorded tracks which exist in a loaded video floppy 1 is performed by referring to a track map. Based on said processing for counting, the display showing the completion of recording and the display showing the number of the unrecorded tracks are performed on a track No. display part 23. Since the information on the track where recording can be possible is displayed, an operator can perform photographing based on said information.

Description

[Detailed Description of the Invention] Summary of the Invention A still video camera capable of setting multiple types of recording modes.
The camera determines whether there is a recordable track in the mode set on the magnetic recording medium, and displays the determination result and, if recording is possible, information regarding the recordable track.

BACKGROUND TECHNICAL FIELD OF THE INVENTION This invention relates to a solid-state electronic imaging device (such as a CCD).
) and records the output still/video signals on a magnetic recording medium.

In conventional still video cameras, a magnetic head is normally moved in the forward direction (from the outer circumferential side to the inner circumferential side) of the magnetic recording medium, and recording is performed on each track. Therefore, in the field reference mode, recording is possible as long as there is at least one unrecorded track on the inner circumference, and even in frame mode, it is possible to record two or more consecutive tracks on the inner circumference. If it remains intact, it can be recorded.

However, if a new recording mode is provided in which recording is performed using another method in addition to the conventional recording method described above, the conventional determination as to whether or not recording is possible cannot be applied as is.

Summary of the Invention Object of the Invention The present invention provides a still video camera having a recording mode that performs recording according to multiple types of methods. j
It is an object of the present invention to enable control as to whether or not recording is possible according to the set recording mode, regardless of which of I number of recording modes is set.

Arrangement of the Invention 1 Actions and Effects The still video camera according to the present invention includes means for setting any one of several FM recording modes; >31. a means for determining whether or not a rotating magnetic recording medium having several tracks has a recordable track in a set mode; a determination result by the determination means; and, if recording is possible, information regarding the recordable track; It is characterized by comprising means for displaying.

1 (Several types of recording modes include, for example, normal mode, which records continuously in the forward direction on tracks of a magnetic recording medium.
Mode (Conventional Recording Mode) There is a skip mode in which recording is performed while leaving adjacent tracks unrecorded in order to record additional information such as 9-character information later. These recording modes may further include a frame recording mode and a field recording mode.

Whether or not recording corresponding to the set recording mode is possible is determined by referring to a track map indicating whether or not recording is performed for each track. and.

If recording is possible, information regarding the recordable tracks is displayed. Information regarding recordable tracks includes the number of remaining tracks that can be recorded in the setting mode to track N of the track to be recorded (where the magnetic head is located).

There will be all unrecorded tracks, number of tracks, etc., regardless of whether recording is possible in the setting mode. If recording is not possible, a message to that effect will be displayed.

In this manner, according to the present invention, even if there are multiple recording modes, it is determined whether recording is possible in the recording mode set among them, and information regarding the determination result and recordable tracks is stored. Since it will be displayed,
The camera operator can now take pictures with J- knowing this information.

An embodiment in which the present invention is applied to a still video camera with a playback function will be described in detail below, but it goes without saying that the present invention can also be applied to a still video camera without a playback function.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows the system configuration of a still fist 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 10 is the main CPU, and controls the overall operation of the still/video φ 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 10, 30, 70 are interconnected by serial transmission lines and communicate with each other.

A playback '5 (playback adapter) 90 can also be connected.

This regenerator 90 demodulates the video signal read from the video floppy disk 1, converts it into a color medium video signal in, for example, NTSC format, and outputs the converted video signal. Regenerator 90
Also includes a CPU and memory, and this CPU is positioned as a sub-CPU to 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. Chuffed by the spindle.

The video floppy 1 has a plurality (for example, 50) tracks (for example, a track pitch of 100 μrs) concentrically arranged, and depending on the shooting process, one field or one frame (one frame) is placed on one or two tracks. FM-modulated color video signals (including luminance signals, color difference signals, etc.) are magnetically recorded. The 50 tracks arranged concentrically on the magnetic recording surface of the video floppy 1 are numbered in order from the outer circumference to the inner circumference.
, 1 to Nα50 are assigned track numbers. The home position HP (original position or standby position) is outside the track N(L1), and the end position EP is inside the track N(L50).

The system control device 10 includes a power switch 16, various mode switches 11 to 14. Shutter release ◆Switches such as button 15 Human signal, packet switch 7 that detects the open/closed state of the packet containing the video floppy
The detection signal of the video floppy detection switch 8 which detects the presence or absence of the video floppy 1, etc. are input. The modes that can be set include frame/field mode, which indicates frame recording or field recording, normal mode, which records sequentially and continuously on each track, and mode, which is used to record additional information on a video floppy, as will be explained in detail later. There are a skip mode in which a track is provided, an edit mode in which additional information such as audio is recorded on an additional information recording track, and the like. These configured modes,
The track number to be recorded, the end of recording to the last track, the number of unrecorded tracks existing on the video floppy 1, and other information are displayed on the product display 2.

This display 21 is connected to the system control device 10 by bus. Furthermore, when some abnormal condition occurs, the buzzer 22 sounds an alarm.

The shutter release button 15 is of a two-stage stroke type, in which the first stage of depression releases the switch S1, and the second stage of further depression of the button 15 causes the switch S2 to be released.
are respectively turned on. When switch Sl 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 incident on the photometric probe 51.
Splitter 34. It is composed of an infrared cutoff filter 35 and a shutter 36. The illuminance detection signal from the photometric element 51 is manually input to the photographing control device 30 via a logarithmic amplifier 52. By the shooting control device 30.

/l111 Processing for calculating the aperture value and shutter speed based on the incident light illuminance detected by the optical 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. The priority of the shutter 3B, unlatching of the trailing curtain, and winding thereof 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 applied to the R in the variable gain amplification circuit described later in the signal processing circuit 71.
, G, and B signals for amplification gain control.

In order to measure the distance to the subject, an infrared light emitting diode 63 and a light receiving element 64 that receives the reflected light are provided. Based on the output signal of the light receiving element 64, a focusing processing circuit 65 measures the distance to the subject. The data that represents this 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.

In addition, there is a telephoto to manually control 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 is arranged, for example, a two-dimensional imaging cell array such as a CCD, to which an RGB filter is attached for color imaging. The image data accumulated in the imaging device 37 when the shutter 36 is opened is transferred to the signal processing circuit 7.
The signal is read out as a serial still video signal (R, G, B) in synchronization with the vertical and horizontal synchronizing signals given from 1 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 1O1 recording control device 70 and regenerator 9
It is given to 0. A reset signal given from the recording control device 70 causes the signal processing circuit 71 to
1° (the reference signal VD is adjusted 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.

Furthermore, data multiplex recording is also possible on video floppies. This multiplex recorded data includes initial bits, field/frame φ data, track address (Nα
) data, date data, and user usage data. These data are provided by the system controller IO.

The signal processing circuit 71 performs D P S K (DIrf'er
ent1al PhaseShlrt Keying)
The signal is modulated, combined with the above-mentioned FM modulated video signal in a combining circuit 7G, and input to a recording amplifier circuit 77.

A magnetic head 2 (
The floppy disks (two of which are provided at intervals so that they are located on adjacent tracks so that frame recording can be performed easily) are supported so as to be movable in the radial direction of the video floppy 1 by their transfer drive control device, and are supported in the same direction. The transfer is controlled by The transfer drive controller includes a stepper motor 87 and its driver 86. The recording control device 70 gives instructions regarding the direction of movement of the magnetic head 2 and the direction of the transfer to the transfer drive control device. A home position switch 6 that detects that the magnetic head 2 has reached the home position HP
A detection signal from this switch 6 is provided to a recording control device 70. Transferring the magnetic head 2 from the outer circumferential side of the video floppy disk to the inner circumferential side is called forward transfer, and transferring it in the opposite direction is called reverse transfer.

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 for a long period of time. This device is head low 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 disk is rotating) or only while the power is turned on. The magnetic head 2 is placed in a sitting position (moving forward and backward) so that it is in contact with the video floppy disk 1, but at other times it is away from the floppy disk.

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 PC. circuit 71
and is input to the recording gate circuit 78. phase pulse pc
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 80. The servo control circuit 80 controls the motor 3 based on the reference clock signal input from the signal processing circuit 7 and the frequency detection signal manually input from the detector 4.
are controlled to rotate at a constant speed (for example, 3,800 r, p, m). Also the servo control circuit 80. Starting and stopping the motor 3 according to commands from the recording control device 70 1. Do this.

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, this gate circuit 78
opens its gate at the timing of the input phase pulse PC 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 predetermined tracks of the video floppy disk 1 is performed. This record is recorded on video floppy 1.
This is done only while rotating. This is the case for field recording. In the case of frame recording, the gate circuit 78 opens its gate for two revolutions of the video floppy 1;
In the first rotation of the video floppy 1, the video signal of the first FILTROT is applied to a certain track by the head 2 of -h, and in the second rotation, the video signal of the first FILTROT is forwardly adjacent to said track by the other head 2. The video signal of the second field is recorded on each 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 read signal is +l
It is used not only for track search processing in the recording 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 signal by an A/D conversion circuit, converted into an 8-bit digital signal representing a quantization level of, for example, 25B, and input to the recording control device 70.

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. Track search processing occurs when a new video floppy is loaded.

This process is performed when the video frame or track recorder is replaced, etc., and the result of this processing, that is, the data indicating whether the track is unrecorded or recorded, is sent to the recording control device 70 or the system controller for each track. It is stored in the memory of device 10 as a track map.

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 also used to detect the peak position of the track in playback mode.

FIG. 2 shows an example of a track map created in the track search process.

In this figure, the numbers marked on the vertical axis are 0, 10°20,
30.40 represents the 10's of the track magnetic field, and the numbers θ~10 written on the horizontal axis represent the 1's digit of the track magnetic field (10 being the exception). Track Nα of No. 50 is represented. A code of "1" or "0" shown in the area where the numbers on the vertical axis intersect with the numbers on the horizontal axis indicates whether or not the track number is recorded, and those marked with "l" are recorded. Tracks marked with "0" are unrecorded tracks. In the example shown in FIG. 2, the number of recorded tracks among the 50 tracks of the video floppy is 40, and the number of unrecorded tracks is 10. The truck in Figure 2
According to Mappu, this video floppy is NCL50.
Since up to the tracks have been recorded, recording is no longer possible in normal mode and skip mode.

3 to 5 show examples of track numbers displayed on the display unit 23 of a still video camera having the system configuration as described above. The track number and display section 23 form a part of the liquid crystal display 21.

FIG. 3 shows an example of displaying the completion of recording on the video floppy 1 and the number of unrecorded tracks existing on the video floppy 1 in the normal mode and the skip mode.

rFFJ displayed in a frame in Figure 3 indicates that recording to the final track of video floppy 1 (the final track differs depending on the recording mode as described later) has been completed and recording is no longer possible. be. The completion of recording on the final track is detected by the recording permission/impossibility determination process to be described later, and the track Nα display section 2 is thereby detected.
3 indicates that recording is not possible rFFJ.

The display "10" outside the frame indicates the number of unrecorded tracks existing on the video floppy 1 when recording is completed.

If the track map is as shown in Figure 2, this video floppy 1 is no longer recordable, and the number of unrecorded tracks remaining is lO, as shown in Figure 3. rF on the track hidden display section 23.
F-10J is displayed. An unrecorded track sandwiched between recorded tracks (in the track map shown in Figure 2).

For example, Nα5. No, 22. 23) are generated by a recording operation in the skip mode or by erasing a recorded track using the regenerator 90. The recording completion display is not limited to displaying rFFJ, but may also be performed by displaying a track name that does not exist on the video floppy 1 (for example, r88J).

The display as shown in FIG.
You can know the number of unrecorded tracks that exist in the . An unrecorded track sandwiched between recorded tracks has an edit track.
A mode recording operation will record a still video signal or an additional information signal.

FIGS. 4 and 5 show examples of displays on the display 21 when it is determined that recording is possible in the recordability determination process.

FIG. 4 shows a mode of displaying the track mark of the track where the magnetic head 2 to be recorded/reproduced is located.
(A) is a display example in field recording mode (or when playing back a field recording signal), (B) is a display example in frame recording mode (or when playing back a frame recording signal)
Display examples are shown for each. As is clear from this figure, a single track number is displayed in field mode, and two track numbers are displayed in frame mode.
Since two tracks NCL are displayed, it is possible to identify whether the setting mode is field mode or frame mode.

FIG. 5 shows how the number of remaining tracks that can be recorded on the video floppy disk 1 is displayed. (A)
In the mode shown in , the number of remaining tracks (8) is displayed within the frame. In the mode shown in (B), rEJ indicating the number of remaining tracks is displayed within the frame, and the number of remaining tracks ("8" in the illustrated example) is displayed outside the frame. In addition to this, the number of recordable tracks can be displayed in a mode in which nothing is displayed inside the frame and the number of recordable tracks is displayed only outside the frame. Even if the number of tracks that can be recorded in mode or skip mode (from the next track in the forward direction of the recorded innermost track to N (number up to track L50),
Regardless of the number of tracks that can be recorded in all modes including edit mode (including unrecorded tracks sandwiched between recorded tracks), or the number of tracks that can be recorded in the set recording mode. good. Further, the number of tracks that can be recorded in the set recording mode and the number of all unrecorded tracks may be displayed.

In any case, when it is determined that recording is possible in the recordability determination process, the display shown in FIGS. 4(A) and (B) (either one depending on the frame/field mode) or FIG. ) or contents as shown in FIG. 5(B) are displayed on the display section 23 in the display 21. When such information regarding an unrecorded track is displayed, it indicates that recording is possible.

Prior to explaining the operation with reference to FIGS. 6 and 7, the transfer control of the magnetic head in each recording mode will be explained.

In the normal mode, the magnetic head 2 is positioned at the innermost unrecorded track next to the innermost track among the recorded tracks. 1 due to the shooting
When recording is performed on the positioned track (field mode) or on two tracks, that track and the track adjacent to the inner circumference (frame mode).

The magnetic head 2 is moved in the forward direction (inner circumferential side) by one track (field mode) or two tracks (frame mode) in preparation for secondary photographic recording. In this way, recording continues in the forward direction up to the final track No. 50 (in the frame mode, No. 49 may be the final track).

In the skip mode, the magnetic head 2 is positioned at the innermost unrecorded track next to the innermost track among the recorded tracks. When recording is performed on two tracks (field mode) that are positioned by photographing, or on two tracks (frame mode), that track and an unrecorded track adjacent to the inner circumferential side.

The magnetic head 2 moves 21-racks in the forward direction (field
mode) or 3 tracks (frame mode) to prepare for the first photographing. In this way, for each recording, the tracks adjacent to the inner (or outer) side of the recording track (or the track to be recorded next) are left as unrecorded until the final track of No. 50 (Nα48 or 49 may be the final recording track), recording is performed in the forward direction. Therefore, for skip mode recording operation, the field Q
For mode, two consecutive tracks are required, and for frame mode, three consecutive tracks are required.

In the edit mode, the magnetic head 2 is positioned at the outermost track among the unrecorded tracks. When recording on this unrecorded track is completed, the magnetic head 2 is transferred in the forward direction to the next existing (not necessarily adjacent) unrecorded track. In this manner, in the edit mode, recording is performed starting from the outermost unrecorded track and searching for unrecorded tracks in the forward direction. In the edit mode for recording additional information, the tracker of the unrecorded track to be recorded is designated by a human-powered device.

FIG. 7 shows the movement of the magnetic head and display processing based on the determination of whether or not recording is possible. Here, in order to simplify the explanation, only the normal mode and the skip mode will be mentioned. This process is executed by the system control device IO based on communication with the recording control device 70 and the like.

The open/closed state of the packet is checked based on the presence or absence of a detection signal from the packet switch 7 (step 120);
The presence or absence of the video floppy 1 in the packet is checked by the video floppy detection switch 8 (step 1
21). If there is video floppy 1 in the packet and the packet is closed (step 120.1
21), it is checked whether a track map indicating whether or not each track of the video floppy 1 has been recorded has already been created (step 122). Since the track map is saved in the recording controller 70 or the system controller IO as described above, the track map can be set by checking the save state or by opening the packet when the track map is created. track by examining the flags that are reset.
It is determined whether the map has been created or not.

When the packet is opened, it is assumed that the video floppy has been replaced, and the track map is cleared (step 123) or the above-mentioned flag is reset. In such cases.

That is, if the track map has not been created yet (No in step 122), its creation processing is performed (step 124). As mentioned above, the track map moves the magnetic head 2 from the home position to the end position, and determines whether or not to record depending on whether the envelope detection signal of each track exceeds a predetermined threshold level. is determined and created by making this determination for all tracks.

A track map has been created. or step 1
Once the track map is created in step 24 (step) 2
2 (YES), press down the shutter release button 15, erase switch (provided on the regenerator 90)
It is determined whether recording or erasing has been performed on the video floppy 1 based on the input signal etc. (step 1).
25). When recording or erasing is performed, the track map is updated (step 126). That is, when recording is performed, "1" is set corresponding to the recorded track on the track map, and when erasing is performed, rOJ is written.

After this, a process for determining whether recording is possible is performed (step 12).
7) This process is illustrated in FIG.

It is determined whether the set recording mode is the normal order mode or the skip φ mode based on the state of the human input signals of the various mode switches 11 to 14 input to the system control device 10 (step 101).

If normal medium mode is set.

Next, it is checked whether the field mode or frame mode is set (step 1).
0B). If field mode is set, refer to the track or map and select the track Nα5.
It is determined whether track 0 is unrecorded (step 107). Track no.

If 50 tracks are unrecorded (Y in step 107)
I;S) Since field recording is possible, this fact is stored in the memory (step 104), and the process returns.

If the track Nα50 has already been recorded (No in step 107); since recording in normal mode is no longer possible, the fact that recording is not possible is stored in the memory (step 109).

If the setting mode is frame mode (step 1)
06), it is checked with reference to the track map whether at least two consecutive tracks, track No. 49 and track No. 50, are unrecorded (step 108). If neither track is recorded (Y in step 108)':S), it is stored in the memory as recordable (step 104), and if any track is already recorded, frame recording cannot be performed. Therefore, it is stored in the memory as unrecordable (step 109).
.

If the skip mode is set (step! 01), then it is checked whether the field competition mode or the frame mode is set (step 102). When the field mode is set, in the skip mode, an unrecorded track is provided on the track adjacent to the track to be recorded (on either the outer or inner side).
Two consecutive tracks are required. Then, it is checked whether at least track numbers 49 and 50 are unrecorded (step 103). If none of the tracks has been recorded, the process moves to step 104 (recording is possible), and if any track has been recorded, the process moves to step 109 (recording is not possible).

If it is set to frame mode (step 10
2) At least track No. 48. Tora Tsuku No.

It is checked whether tracks No. 49 and No. 50 are unrecorded (step 105). If all these tracks are unrecorded, the process moves to step 104 (recordable), and if any one track has been recorded, the process moves to step 109 (recordable).

In FIG. 7, when one or more recordability determination processes are completed, the contents stored in the memory are read out in step 104 or 109 and it is determined whether recording is possible (step 1
28). If there is a memory indicating that recording is not possible (NO in step 128), the number of unrecorded tracks existing on the loaded video floppy 1 is counted by referring to the track map (step 129). . Based on this counting process, as shown in FIG.
) is displayed.

If it is determined that recording is possible (YES in step 128),
Recording is allowed (e.g. flagged as recordable)
(Step 131) The magnetic head 2 is moved to the next track to be recorded by the step motor 87 according to the set mode, and is prepared for the next recording.
Step 132). And depending on the frame/field mode.

The track number where the magnetic head 2 is located after the transfer, as shown in FIG. 4(A) or (B), is displayed on the display unit 23 (step 131) (FIG. 5(A) or (
(n) may be used to display the number of remaining tracks).

In edit mode, when all tracks have been recorded (in the case of field recording), it will be determined that recording is not possible. At this time, rFFJ display is performed. If recording is possible, the track where the magnetic head is located or the number of remaining tracks will be displayed.

In the above embodiment, after the recording to the final track is completed, there is an FF display to indicate that recording has ended, and a process to display the number of unrecorded tracks on the video floppy 1 when recording is completed. However, these treatments are not necessarily necessary.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the system configuration of a still video camera, and FIG. 2 is a diagram showing an example of a track map. Figures 3 to 5 show examples of track numbers and displays on the display. Figure 3 shows how the end of recording and the number of unrecorded tracks are displayed, and Figures 4 (A) and (B) show how the magnetic This shows the mode of displaying the track Nα where the head is located, (
8) is an example of the display in field fist mode 1, (B)
Figure 5 (A) shows an example of display in frame mode.
(B) shows a mode of displaying the number of remaining recordable tracks, (A) shows a display within a frame, and (B) shows another display example. FIG. 6 is a flow chart showing the procedure for determining whether recording is possible, and FIG. 7 is a flow chart showing the procedure for transporting the magnetic head and display processing based on the determination of whether recording is possible. 1...Video-floppy. 2...Magnetic head. 10... System control device. If-14...Mode switch. 21...Liquid crystal display. 23...Track N (L display section. 70...Recording control device. 86...Driver. 87...Step motor. Agent for the above patent applicant Fuji Photo Film Co., Ltd.)
Patent attorney Asamichi Kato (
(1 person outside) Figure 2

Claims (1)

[Claims] Means for setting any one of a plurality of recording modes, a means for determining whether or not a rotating magnetic recording medium having a plurality of tracks has a track that can be recorded in the set mode. A still video camera comprising: means for determining; and means for displaying a determination result by the determining means and, if recording is possible, information regarding recordable tracks.