JPS63204980A - Picture recording device - Google Patents

Abstract

PURPOSE:To make a recording operation for a photographing operation not be late by searching a yet unrecorded track, and preparing for a recording to the yet unrecorded track previously, when a recording medium is loaded or after the recording to a field or a frame is finished. CONSTITUTION:When a controlling part 28 receives a detection signal that a floppy disk 21 is loaded to a spindle motor 23, or when the recording to one track is finished, the controlling part 28 obtains the position of the yet unrecorded track from the detection signal from a comparator 31 and the shift control of a head shifting mechanism 26, and performs a recording preparation to make a recording reproducing head 20 position at the yet unrecorded track, and makes the recording head automatically shift to the position of the yet unrecorded track at the time of the loading of the floppy disk 21, and further, makes the recording head automatically shift to the position of the following yet unrecorded track at the time of the finish of the recording to one track through a photographing under the state that the floppy disk is loaded. Thus, at the time of the operation of a release 29, an exposure and the recording can be executed immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image recording device for recording still image signals on each recording track of a recording medium such as a floppy disk.

Background of the Invention - In a still video camera, a captured image signal from an imaging system is converted into a video signal by a recording/reproducing system, and a recording/reproducing head is moved to the recording track position of a floppy disk that is driven to rotate at a constant speed. By supplying a signalized recording current, recording is performed on the recording track in units of fields or frames. Furthermore, the video signal recorded on the floppy disk can be played back directly by a still video camera or by using a player, and the played video signal can be displayed on a monitor television or the like.

Such an image recording device enables repeated recording to flow and bee disks, and also enables erasure and editing of recorded images. For this reason, floppy disks often contain both recorded and unrecorded tracks.

In track order recording control, new recording on a recorded track erases the previously recorded image.

Therefore, conventionally, when recording an image signal, the position of the recording/playback head on a 4-floppy disk is detected whether it is a recorded track position or an unrecorded track position, and recording is allowed if it is an unrecorded track, but If it is a track, recording control is performed to move the head to an unrecorded track position (for example, in Japanese Patent Laid-Open No. 60-253
Publication No. 002).

-Problems to be Solved by the Invention- In the conventional recording control system, it is detected whether or not the track on which the head is positioned when the release is pressed is already recorded, and if the track is already recorded, the head is moved to an unrecorded state. To move to the recording track position and then start recording operation,
The time from pressing the release button down to recording may take a long time, leading to the risk of missing a photo opportunity.

A possible solution to this problem is to only expose the image sensor by pressing the release button down, and then read the image stored in the image sensor to the recording system and record it when you are ready to record on an unrecorded track. . However, when the time from exposure to readout of an image sensor becomes long, there is a problem in that the S/N of a stored image deteriorates due to dark current during that time.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image recording apparatus that can reliably record on unrecorded tracks without reducing the S/N of recorded images and without delaying recording operations relative to photographing operations.

Means and Effects for Solving the Problems The present invention achieves the above objects.

In an image recording device that records a still image signal on each recording track of a recording medium having a plurality of recording tracks, an unrecorded track is searched when the recording medium is loaded or after recording in a field or frame is completed. The recording head is automatically moved to the unrecorded track position when a recording medium is loaded, and the recording head is automatically moved to the unrecorded track position when recording of a field or frame is completed. The recording head is moved to the next unrecorded track position, and a recording preparation position is obtained in which exposure and recording can be performed immediately during a photographing operation.

One Embodiment - FIG. 1 is an apparatus configuration diagram showing one embodiment of the present invention. The imaging system includes an optical lens 11, an iris 12, an image sensor 13, a signal processing circuit 14, an exposure control circuit 15, and an image sensor drive circuit 16. Obtain image signal output. In the recording and reproducing system, a modulation circuit 17 performs FM modulation on the output of the signal processing circuit 14 including a synchronizing signal to obtain a recorded image signal, this signal is amplified by a recording amplifier 18, and is sent to the recording and reproducing head via a changeover switch 19. A recording current is applied to the floppy disk 20 to record on the floppy disk 21 in fields or frames. Further, the reproduction signal from the floppy disk 21 passes through the recording/reproduction head 20 and the changeover switch 19, is amplified by the reproduction amplifier 22, and is taken out as a reproduction signal. The floppy disk 21 is rotated at a constant speed by a spindle motor 23, and a synchronization signal from a synchronization signal generation circuit 24 is used to synchronize the spindle motor 23, the image sensor drive circuit 16, and the modulation circuit 17. It is driven by a servo circuit 25. The recording/reproducing head 20 is provided with a head moving mechanism 26 to move the head relative to the tracks of the floppy disk 21.
Further, a floppy disk mounting mechanism 27 for mounting the floppy disk 21 on the spindle motor 23 is provided.

Here, the control unit 28 performs photographing control for each unit in response to the operation of the release 29, one of which is position control 41 of the recording/reproducing head 20 with respect to the floppy disk 21! Prepare for age. This position control is performed by a control command to the head moving mechanism 26, and as a detection signal for this purpose, the output of the reproduction amplifier 22, which is a reproduction signal at the current track position of the recording and reproduction head 20, is sent to the detection circuit 30. A detection signal of the presence or absence of image recording by the comparator 31 and a detection signal of the presence or absence of loading of the floppy disk 21 provided in the floppy disk loading mechanism 27 are used. Based on these detection signals, the control unit 28 determines whether the floppy disk 21 is loaded into the spindle motor 23 or when recording has been completed on one track. Obtain the recording track position and prepare for recording by positioning the RAD 20 for recording/reproduction on the unrecorded track, and when the floppy disk 21 is loaded, the recording head is automatically moved to the unrecorded track position. A recording head is automatically moved to the next unrecorded track position upon completion of recording on one track by photographing in a loaded state, and exposure and recording can be performed immediately when operating a release 29.

Hereinafter, the above-mentioned position control by the control section 28 will be explained in detail.

First, the control when loading the floppy disk 21 will be explained with reference to FIG. When the jacket containing the floppy disk 21 is loaded into the seat holder of the still video camera, the sheet detection switch provided in the floppy disk loading mechanism 27 sends a new floppy disk loading detection signal PACK to the control section 28. Furthermore, when the lid of the sheet holder loaded with the floppy disk 21 is closed, a lock detection switch provided in the floppy disk mounting mechanism 27 sends a detection signal EJEIJ to set the normal position of the floppy disk.
is given to the control unit 28. From these detection signals,
The control unit 28 starts the spindle motor 23,
A position movement command for two tracks is given to the head movement plunger of the head movement mechanism 26, and playback control is performed for the track that the recording/playback head 20 is in contact with.Comparison 2!3
The detection signal from 1 determines whether the track is a recorded track or an unrecorded track.
Controls movement for each track and then begins judgment on the next track. This determination of the presence or absence of recording is repeated, and if the track is unrecorded, the movement control of the recording/reproducing head 20 is stopped, and the driving of the spindle motor 23 is also stopped. And release 29
Waiting for the operation, the release 29 is operated to start the spindle motor 23 and start photographing control. The HDRTN signal is a signal indicating whether the head has returned to its initial position.
When w, it returns to the initial position. Therefore, when the head is moved by one track, it immediately becomes the old gh.

Note that the initial movement for two tracks is performed by the head moving mechanism 2.
The mechanism 6 is necessary to position the recording/reproducing head 20 two tracks outside the first track (outermost circumference) of the floppy disk before loading the floppy disk, and this initial position In a mechanism in which the first track is located on the first track, the two-track movement control becomes unnecessary.

Furthermore, when the floppy disk 21 is taken out when some tracks or all 11 shadows are completed, as shown in FIG. 3, control such as stopping the spindle motor 23 is performed based on the change in the signal EJEC↑. Note that one illustration is omitted. However, in this embodiment, the head is forcibly returned to its initial position when the lid is opened. Therefore.

Just open the lid once, without having to take out the disc.
When the lid is closed again (when the opening operation is interrupted at timing t2 during the opening operation and the lid is closed), it is necessary to perform an unrecorded track search similar to when the disk is replaced. However, if the lid is opened a little and then immediately closed (if the lid moves from opening to closing at timing E1), the 2nd head has not returned to its initial position, so there is no need to search for unrecorded tracks. , control in the process of shooting multiple frames will be explained. From the control when loading a floppy disk to the recording/playback described above, the RAD 20 is at an unrecorded track position, and a time chart of single copy control when the next track is unrecorded from this state is shown in Figure 4. In the middle, S2 indicates the second stage switch of the two-stage press release 29.

The DC/DC and spindle motor 23 that serve as the power source for the image sensor 13 are already turned on by the first switch of the release 29. Control from turning on the switch S2 to exposure is performed in the same way as in a normal film camera, and after exposure, recording is performed immediately, and the shutter is charged and the head is moved. Along with the movement of the recording/playback head 20, the control is changed from the recording mode to the playback mode. The signal PB/REC is switched to
, DKT. In this case, since no recording has been made, the spindle motor z3 is brake-controlled, DC/DC is turned off, and the photographing operation is ended.

Next, the case where the next track has already been recorded in single shooting will be explained with reference to FIG. In this case, since there is a reproduction signal at the end of the recording REC, the head is repeatedly fed to the unrecorded track where the signals R and DE↑ disappear, and the fourth
The photographing operation ends in the same way as in the case shown in the figure.

Next, control in the case of Jul copy will be explained with reference to FIG. In this case, the recording/reproducing head 20 is moved immediately after recording, and if the primary track is unrecorded, exposure and recording are performed immediately.

When the destination of the recording/reproducing head 20 has already been recorded,
In the illustration, there are three consecutive unrecorded tracks, followed by two recorded tracks, and the next two tracks are unrecorded. In the case of rapid shooting, shown in , the operation ends when the signal S2 is turned off, but the sequence from the last recording to the end is the same as in the case of single shooting.

In the embodiments described above, if no unregistered track is detected on the disc in use as a result of performing a track search after one shooting and recording, the spindle motor 23 is stopped and the recording device will be displayed in
Alternatively, a warning sound is generated to notify the user of the state where photography is not allowed. In addition, when detecting whether or not recording has been completed, detection is performed based on the reproduction voltage recorded on the innermost circumference of the disc, as described in Japanese Patent Application No. 61-303045 by the present applicant. Just do it.

As is clear from the above explanation, whether in loading the floppy disk z1, in single shooting, or in continuous shooting, the recording head is moved to the unrecorded track position at the end of the shooting operation, and the release 29 is moved to the position of the unrecorded track at the time of the next shooting. Recording can be performed immediately in response to operations.

In the embodiments described above, a case has been shown in which the head is sent while determining whether each track has been recorded or not. It is also possible to control the head to be moved step by step directly or track by track to the next unrecorded track 2 upon completion of photographing. In this case, to search for unrecorded tracks, set the initial position of the head to the final track position (the innermost circumference of the floppy disk), and when the floppy disk is loaded, record each track while moving the head to the first track position. Detects and stores the presence or absence of Then, the head is moved from the first track position to the nearest unrecorded track position,
In subsequent shooting, after recording, the head is moved to the next unrecorded track, which is the closest one, and the shooting ends.

In addition, as another search method, the initial position of the head can be
track, and when the floppy disk is loaded, it moves to the last track to detect the presence or absence of recording.
Compared to the above-mentioned search method, this method of fast forwarding back to the first track or initial position on the last track
The head's track-by-track feeding mechanism only needs to be moved in one direction, and by providing a search method that simplifies the JJ mechanism, there is no need to detect the presence or absence of recording in post-recording processing, and the head can be moved to unrecorded tracks. It also has the effect of shortening the head movement time after recording and improving the speed of quick shooting.

Effects of the Invention As described above, the present invention automatically moves the RAD to the unrecorded track position when a recording medium such as a floppy disk is loaded, and automatically moves the next track when recording a field or frame. The recording head is moved to an unrecorded track position to obtain a recording preparation position that allows exposure and recording to be performed immediately during shooting operations, so operations from shutter operation to recording during shooting can be performed quickly, allowing for single shots and recording. You won't miss a photo opportunity when taking snapshots,
This eliminates the need for storage time in the image sensor, thereby eliminating deterioration in image quality.

[Brief explanation of the drawing]

Fig. 1 is a device configuration diagram showing one embodiment of the present invention, Figs. 2 and 3 are control time charts when inserting and removing a floppy disk, and Figs. 4 and 5 are control time charts for single shooting. , FIG. 6 is a time chart for quick shooting. 13... Image sensor, 14... Signal processing circuit, 18.
... Recording amplifier, 20... Recording/playback head. 21... Floppy disk, 22... Playback amplifier, 26... Head moving mechanism, 27... Floppy disk mounting mechanism, 28... Control unit, 29...
- Release, 30...detection circuit, 31...comparator.

Claims (1)

[Claims] 1) In an image recording device that records a still image signal on each recording track of a recording medium having a plurality of recording tracks, when the recording medium is loaded or after recording in a field or frame is completed, an unrecorded track is recorded. 1. An image recording apparatus comprising: a control means for searching for and preparing for recording on the unrecorded track.