JP4740223B2 - VIDEO RECORDING METHOD AND DEVICE, VIDEO REPRODUCTION METHOD AND DEVICE, AND RECORDING MEDIUM - Google Patents

Description

The present invention relates to an apparatus for recording information on a recording medium, and more particularly to a state in which the apparatus can start recording after the apparatus is turned on.

The optical disk drive requires a relatively long time for starting operation from the disk rotation stop state to the steady rotation. For this reason, an information recording apparatus that records an image pickup signal has a problem that an image pickup signal cannot be recorded for a while after the power is turned on, and a shooting opportunity is missed.

In view of this, the apparatus described in Japanese Patent Laid-Open No. 10-93918 has attempted to avoid the unrecordable state by the following method.

That is, after the user turns on the power of the apparatus, the compression encoded signal of the imaging signal (hereinafter simply referred to as imaging signal) until the disk drive unit reaches a recordable state is temporarily stored in the memory means. In a stage where the disk drive unit is ready for recording, recording is started to the recording means of the disk drive while inputting the subsequent imaging signal to the memory means.

Here, if the amount of information per unit time input from the imaging unit to the memory means is smaller than the amount of information per unit time recorded by the recording means, the storage amount of the memory gradually decreases. Therefore, when the remaining storage amount of the memory means becomes 0, the image pickup signal is directly input to the recording means of the disk drive, and thereafter this state is continued until the user gives a recording stop instruction.

If the user gives an instruction to stop recording while the memory means has a remaining storage capacity, the remaining information stored in the memory means is recorded and the recording is completed.

As another method, in order to record the information stored in the memory means until the disk drive unit is ready for recording, it is necessary to drive the recording space on the disk at a position where the recording space is previously opened. After seeking the head, the subsequent imaging signal is first input to the recording means of the disk drive, and after the user instructs the recording stop, the imaging signal stored in the memory means is opened in advance. Record in the disk space you used.

The above method is disclosed as a method for avoiding an unrecordable state after the power is turned on until the disk drive reaches a predetermined rotation.

Japanese Patent Laid-Open No. 10-93918

In the above conventional technique, the following points are not particularly considered.
First, during the recording impossible period, the image pickup signal is accumulated in the memory means, and then the recording starts at the stage when the disk rotation operation of the drive reaches the steady rotation, and the accumulation amount of the memory means gradually decreases.
When the accumulation amount reaches zero, a switching unit is required to input the subsequent imaging signal directly to the recording unit of the drive. In addition, in order to know the switching timing, it has the complexity of always observing the state of rotation and determining whether the imaging signal should be input to the memory means or directly to the recording means.
Therefore, a first object of the present invention is to eliminate the switching means and simplify the above algorithm.

Also, the user does not always start recording at the same time as the power is turned on. However, the above conventional technique does not particularly disclose an explicit method and timing that the user can start recording. The second object of the present invention is to clearly indicate to the user that recording is possible even if the activation operation of each part of the drive is not completed after the user powers on the apparatus.

In addition, the startup operation of the optical disc drive requires at least the following processing requirements in addition to the startup operation of the disc rotation. That is,
(1) A laser diode that emits a laser that irradiates a medium, and a laser emission control circuit that controls the output of the laser diode to an output corresponding to a signal to be recorded or a predetermined output.
(2) A photoelectric conversion circuit that converts reflected light, which is moved in response to pits and recording marks on a disk medium, into an electric signal when the laser emits light with a predetermined output.
(3) An objective lens for condensing the laser beam, and the objective lens is moved in the same direction as the optical axis to focus on the recording medium surface, and is moved in the radial direction of the medium to be tracked on the medium. Actuator mechanism that traces (tracks) the focused spot and its control circuit.
(4) A spindle motor for rotating the disk medium and its control circuit. A slider mechanism that moves at least the pedestal on which the objective lens and the actuator mechanism are mounted, and its control circuit, because the tracking actuator mechanism alone cannot access all tracks.
It is necessary to sequentially operate the above control circuits.

That is, in order to record a signal on the optical disc or to reproduce a signal from the optical disc, first, the mechanism (3) and (4) is controlled to focus the laser beam on the track on the disc medium. After performing the tracking, the circuit of (1), (2) or (3) is properly controlled, and recording and reproduction can be executed for the first time.

However, the optical disc drive is easily affected by disc variations and device variations, and it is not so easy to realize the appropriate control. Therefore, many learning controls have been devised to find appropriate control values to be set in the control circuit group (mainly actuator control circuit and laser emission control circuit).

Among these, the learning control of the laser emission control system includes learning of the recording emission power and the emission timing of the recording power (adjustment of the time axis phase, hereinafter simply referred to as recording phase).
There are many relatively time-consuming controls such as learning.

When the same mechanism and control circuit system are used for other types of disk media, an error signal for focus control and tracking control generated by reflected light from the disk, or a disk for disk rotation control in advance. The medium is discriminated from various physical quantities such as the amplitude of various control feedback signals and the amplitude of information reproduction signals, such as a signal proportional to the disk rotation speed carved on the track. This physical medium determination process also requires a relatively long time.

In addition, in order to reliably determine the medium, it is necessary to read the medium information recorded in advance on the medium and read the physical format information for each medium type.

Furthermore, it is necessary to read out management information of the medium such as defect management information for a rewritable disc and information about a writable position for a write-once disc. The reading process of these information also requires a relatively long time. In particular, a write-once disc requires a search process to determine where the final recording position is actually in order to confirm the consistency between the final recording position recorded in the read medium management information and the actual writable position. And requires a very long time.

In this manner, in a recording apparatus using a disk medium, there are many items that require a considerable time to reach a recordable state, other than the disk rotation starting operation after the power is turned on.

That is, in the above conventional technique, there is no particular disclosure regarding avoidance of the non-recordable time due to the above requirements. Therefore, a third object of the present invention is to avoid the recording impossible time other than the disk rotation start after the power is turned on.

In order to solve the above problems, the present invention has taken the following measures.
First, in order to achieve the first purpose, instead of observing the switching condition from the non-recordable state to the recordable state, the memory unit stores the memory unit when the amount stored in the memory unit exceeds a predetermined amount. The input of the received information to the recording means of the drive is started.
Further, in order to achieve the second object, a display means for recognizing that the user can start recording is provided.
In order to achieve the third object, first, when it is clear that a disk insertion / removal monitoring means is provided and the disk has not been replaced, the medium type determination described as a time-consuming process in the above problem is performed. It is possible to delete a part or all of the processing, the final recording position search processing of the medium management information and user information in the write-once disc, or the recording power and recording phase learning processing. As a result, the time during which the recording means of the drive cannot record after power-on can be greatly reduced.

Therefore, if the disk is inserted and the power is turned on for the first time, recording is performed by the user after the recording means reaches a recordable state in order to execute the above processing requirements in the first processing procedure. If the start permission is clearly specified and the power is turned on for the second time or later, the user starts from the start of the second processing procedure in which the processing with the long processing time in the above processing requirements is deleted, and before the user can start recording. In this configuration, recording start permission is given.

According to the present invention, there is an effect that it is possible to achieve avoidance of an unrecordable state with a relatively fixed processing time such as a disk rotation start operation with a simple algorithm configuration.

In addition, with regard to processing that takes time after power-on, in the start-up processing after power-on for the second and subsequent times, excluding the first start-up processing of disc insertion, it is possible to avoid a long unrecordable time. .

In addition, by clearly indicating permission of recording start to the user, it is possible to easily know from what timing the user can start recording.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. This embodiment is an example of a video camera that records a video signal imaged by an imaging unit on an optical disk. First,
The operation and configuration of each part will be described with reference to FIG.

First, the implementation of the disk insertion / extraction means will be described.
Reference numeral 1 denotes a cover of a housing for storing the optical disk 3. Reference numeral 2 denotes a switch for detecting opening / closing of the lid 1 and is connected to the system controller 22. The system controller 22 is a microprocessor that is driven by the main battery 31 or the backup battery 30 through the series regulator circuit 33 and the switch 32, whereby the lid switch 2 is in a state in which the energization from the main battery 31 is cut off by the main power switch 31. Even so, the opening and closing of the lid 1 is detected, thereby recognizing whether or not there is a possibility that the disk has been inserted or removed.

Next, the spindle motor control means will be described.
A spindle motor 4 drives the rotation of the disk 3. The spindle motor 4 generates its own rotation speed proportional signal and supplies it to the spindle motor control circuit 5. The spindle motor control circuit 5 measures the period and phase of the rotational speed proportional signal, generates a speed error signal and a phase error signal from the deviation from the target period, and applies them to the spindle motor to control the rotational speed.

Further, the photoelectric conversion circuit 16 detects a frequency signal proportional to the number of rotations of the disk previously engraved in the track of the disk medium included in the reflected light, and supplies it to the spindle motor control circuit 5. The spindle motor control circuit 5 generates a control signal that the signal on the disk format should have a predetermined rotation speed and applies it to the spindle motor 4 to control the rotation speed.

Next, the slider motor control means will be described.
Reference numeral 9 denotes an objective lens 7, an actuator mechanism 8, a laser diode 14, and a photoelectric conversion circuit 16.
10 is a slider motor, which is composed of a microstep motor or the like. A slider motor control circuit 11 receives a set value from the drive controller 12 and generates a two-phase rectangular wave or sine wave drive signal to the microstep motor 10. How much the slider is moved is controlled by the wave number of the drive waveform.

Next, the actuator control means will be described.
Reference numeral 8 denotes an actuator mechanism for driving the objective lens, which is movable in the optical axis direction and the disk radial direction by a control signal from the actuator servo control circuit 17, respectively. The actuator servo control circuit 17 generates a focus and tracking error signal based on the signal obtained by converting the reflected light from the disk into an electrical signal by the photoelectric conversion circuit 16, and generates a control signal by performing appropriate control compensation. .

Next, signal recording / reproducing means will be described. Reference numeral 14 denotes a laser diode, and the emitted laser light enters the objective lens 7. The output of the laser diode 14 is controlled by the laser driver 15. The laser driver controls the laser output with a predetermined value at the time of reproduction, and controls the laser diode 14 so that the laser output is responsive to the modulation signal supplied from the modulation / demodulation circuit 18 at the time of recording. This type of recording / playback switching is executed by the driver controller 12.

On the other hand, the reflected light from the disk surface is input to the modulation / demodulation circuit 18 through the photoelectric conversion circuit 16 and demodulated. Mode switching such as modulation / demodulation of the modem circuit is also performed by the drive controller 12.

Next, the operation of the upper device of the drive shown in FIG. 1 will be described with reference to FIG.
First, the description starts from a state in which the main power switch 31 is cut off. When the main power switch 31 is cut off, the power switch 32 is connected to the backup battery 30.
The side is selected. In this state, the system controller 2 passes through the stabilized power supply circuit 33.
Monitoring of the lid switch 2 by 2 and the power-on instruction switch 6 is operating.

From this state, when the user operates the power-on switch 6 to command power-on, the system controller 22 turns on the power main switch 31. When the main power switch 31 is turned on, the power switch 32 switches the power to the main battery 29 side. Based on this switching signal, the reset signal generation circuit 41 switches the system controller 22 from the low power consumption state for the backup battery to the normal operation mode. In FIG. 2, the timing at which the power supply SW (31) is excited by Power On in the command from the system controller (22) corresponds to the above-described aspect.

In this state, the system controller 22 activates the power supply circuit 26. The power supply circuit 26 energizes each part (power supply signal 36) and resets the drive controller 12 (reset signal 35).
)I do. Based on this, the drive controller 12 uses the packet interface circuit 1
9 is waiting for a command from the upper part through 9.
Here, the system controller 22 operates the lid switch 2 while the main power switch 31 is off.
When there is an open / close state, the memory controller 21 is notified accordingly.

In response to this, the memory controller 21 instructs the drive controller 12 to start using the first starting method via the packet interface circuit 19 (Loa in FIG. 2).
d1).
In response to this, the drive controller 12 operates the power switch 40 inside the drive,
The energization of each part of the drive is started, and the start-up process is started (load processing part shown in FIG. 2).

A specific example of this starting operation is shown in FIG. First, the actuator control circuit 17 is operated to move the lens 7 away from the disk by the actuator mechanism 8.
s101) is executed, and then the laser driver 15 is operated to cause the laser diode 14 to emit light with a predetermined light emission power (s102). As a result, the laser can be emitted without sudden focusing on the disk plate surface.

Next, the drive controller 12 operates the actuator control circuit 17 to move the lens 7 up and down in the optical axis direction. As a result, disk reflected light is obtained from the photoelectric conversion circuit 16 when passing near the focal point. Based on the amplitude of the reflected light and the like, the first stage of the disk is classified (s103).

Next, the drive controller 12 operates the spindle motor control circuit 5 to start rotation of the spindle 4 (s104). At this stage, the spindle motor control circuit 5 performs control based on a proportional signal of the motor rotation frequency generated by the spindle motor 4 itself.

Next, the drive controller 12 operates the actuator control circuit 17 again and moves the lens 7 up and down by the actuator mechanism 8 to focus the laser beam on the disk plate surface (s105).

When the laser beam is focused on the disk plate surface, a track crossing signal across the track on which the laser beam is engraved on the disk can be observed by the eccentricity inherent in the disk itself or the spindle motor 4. Therefore, the drive controller 12 further performs the second medium type classification based on the amplitude of the track crossing signal input from the photoelectric conversion circuit 16 to the actuator control circuit 17. Thereby, it is possible to determine a general physical medium type (s106).

Next, the drive controller 12 operates the actuator control circuit 17 to cause the laser beam to follow any track of the track crossing signal (s107).
As a result, preparations for reading information recorded on the disk track are completed. Therefore, the drive controller 12 reads medium information recorded in advance on a specific track defined for each disc format standard. The medium type is logically determined by this medium information read (s108).

Next, the drive controller 12 reads the management information of the medium (s109). As the medium management information, for example, in the case of a rewritable disc, information such as where the defect is on the disk plate surface and where the preliminary recording position is assigned instead of the defective portion is stored.
This defect management information is generally multiplexed and recorded at multiple locations on the disk surface to ensure safety, and the disk can be replaced to determine which management information is most reliable. If there is a possibility, all of them are read out and information considered to be most effective is adopted.

In addition, as management information in the write-once disc, information such as how far the disc has been used is recorded. In the case of the write-once disc, the drive controller 12
In order to confirm the consistency between the final recording position described in the management information and the actual final recording position, the actual final recording position is searched based on the final recording position information recorded in the management information. (S110).

The above is the starting operation by the first starting method. In FIG. 2, for the sake of convenience, a setup for controlling the spindle motor 4 and the actuator mechanism 8 (Setup in the figure) and a medium discrimination process (J in the figure).
udge), medium information or medium management information, or read processing for additional position search (Read in the figure)
It is described.

Again, the description returns to the case where the lid opening history is recognized before the power is turned on according to FIGS. 1 and 2.
The system controller 22 instructs the memory controller 21 during the activation operation by the first activation method of the drive controller 12 to instruct not to accept a recording start request from the user. In order for the user to know this, the memory controller 21 superimposes it on the image signal (internally included in the compression / decompression circuit 24 not shown) and displays on the liquid crystal monitor 25 that the disk recognition operation is in progress.

Here, when the drive controller 12 notifies the memory controller 21 via the packet interface circuit 19 that the startup process by the first startup method described above has been completed, the memory controller 21 notifies the system controller 22 accordingly. At the same time, it is indicated to the user that the recordable state has been reached in the same manner as the previous disc recognition operation display (Rec Pause display in FIG. 2).
In response to this notification, the system controller 22 starts monitoring the button switch 27 that accepts a recording start / stop request from the user.

When there is no user recording start request instruction from the system controller 22, the memory controller 21 requests the drive controller 12 to stop operating in order to reduce power consumption. In response to the request, the drive controller 12 stops the operation of each unit, shuts off the power switch 40, and suppresses power consumption.

In this state, when the user issues a recording start command (Rec Start in FIG. 2) using the button switch 27, the system controller 22 receives the command and instructs the memory controller 21 to start recording.

The memory controller 21 instructs the drive controller 12 to start recording (FIG. 2 Wr
ite), the output signal of the imaging circuit 23 is encoded by the compression / decompression circuit 24, and an operation to start accumulation in the memory circuit 20 is performed. Further, the start of recording is displayed to the user by the liquid crystal monitor 25 (display in Rec in FIG. 2).

When receiving an instruction to start recording, the drive controller 12 turns on the power switch 40,
Resume control of the spindle motor, laser emission, and actuator that were stopped. already,
Since the identification of the medium, the acquisition of the medium management information, etc., or the confirmation of the write-once position on the write-once disc has been completed, the mechanical control system and the laser emission are simply restarted in a relatively short time. Startup is complete.

However, since the learning process of the optimum values of the recording power and recording phase for this medium has not yet been performed, the optimum values of at least one of the recording power and the recording phase or both during the storage period of the imaging signal in the memory 20 Perform learning process.
The recording power and recording phase learning process is executed by trial writing by actually recording and evaluating the writing condition while sequentially changing the parameters for adjusting the recording power and recording phase.

Therefore, in the case of a rewritable disc, since the test writing area can be used repeatedly, the recording power / phase learning process can be performed in the first start-up process after power-on as described above.

On the other hand, the write-once disc cannot repeatedly use the test writing area once used, so that the number of trial writings that can be executed on one disc is limited. Therefore, the learning process of the recording power / phase is not performed in the startup process after the power is turned on, and the learning process is generally performed when a recording request is actually made.
Even when this learning process is completed, the memory controller 21 does not immediately start recording. The memory controller 21 starts recording when the amount of image signals stored in the memory circuit 20 exceeds the first predetermined amount.

When recording is started, the storage amount of the memory circuit 20 gradually decreases. The memory controller 21 stops the recording when the remaining storage amount of the memory circuit 20 falls below the second predetermined value. In addition, a stop request is made to the drive controller 12 to suppress power consumption of the drive unit until recording is started again. In response to this, the drive controller 12 stops the operation of each part and shuts off the power switch 40 to suppress power consumption.

When the recording is stopped, the storage amount of the memory circuit 20 increases again. The memory controller 21 is a little before the storage amount of the memory circuit 20 reaches the first storage amount, and the drive controller 1
2 start request. In response to this, the drive controller 12 again turns on the power switch 4.
0 is input to operate the spindle motor control circuit 5, the laser driver 15, and the actuator control circuit 17. This time, since the recording power / phase learning has already been completed, the state shifts to a recordable state in a very short time.

The intermittent recording operation described above continues until the user operates the button switch 27 to request a recording stop. When the user operates the button switch 27 to instruct to stop recording (Rec Stop in FIG. 2), the system controller 22 detects this and notifies the memory controller 21 accordingly. When the memory controller 21 receives this notification, the memory circuit 2 for the image pickup signal will be referred to thereafter.
The input to 0 is stopped and the display on the liquid crystal monitor is changed to a recording start permission state. Also,
The memory controller 21 waits for the drive to record all the remaining information of the memory circuit 20 and makes a stop request to the drive controller 12. In response to this, the drive controller 12 stops the operation of each part and shuts off the power switch 40 to suppress power consumption.

In this state, when the user operates the button switch 27 again, the system controller 22 requests the memory controller 21 to start recording again (not particularly shown in FIG. 2).
In response to this, the memory controller 21 starts storing the imaging signal in the memory circuit 20,
Thereafter, the same intermittent recording operation as described above is repeated.

On the other hand, when recording is stopped, the user operates the power switch 6 to request power-off of the entire apparatus (Power Off in FIG. 2), and this is detected by the system controller 22 and the memory controller 21 detects that. Notify that. The memory controller 21 notifies the drive controller 12 of the request for power shutdown.

In response to this, the drive controller 12 records the medium type of the currently loaded disk, the learning value of the recording power / phase, and the final recording position information recorded in the medium management information and the actual final recording position if it is a write-once disk. If it is a rewritable disc, the non-volatile memory circuit 13 stores the validity of the defect management information recorded in multiple recording. When the drive controller 12 reports the completion of this information saving to the memory controller 21, the memory controller 21 reports this to the system controller 22, and receives this, the system controller 2.
2 stops the operation of the power supply circuit 26 and stops the power supply of the drive unit and the imaging block. Thereafter, the system controller 22 shuts off the main power switch 31 while continuing only the monitoring program operation of the power on / off instruction switch 6 and the lid switch 2, and shifts itself to the power saving operation by the backup battery 30. .

The operation when the user instructs to turn on the entire apparatus when the lid 1 is opened and closed and the disk may be replaced when the power is shut off has been described above. Next, the operation in the case where it is clear that the lid 1 has never been opened or closed during power-off and the disk has not been replaced will be described with reference to FIGS. 1, 3 and 4B. .

First, when the user operates the power on / off switch 6 to give a power on instruction, the system controller 22 detects this. Here, the system controller 22 switches from the operation of the backup battery 30 to the operation of the main battery 29, and operates the power supply circuit 26 to energize the drive block and the imaging block (power supply line 36).
The operation up to this point is the same as described in FIG.

The system controller 22 notifies the memory controller 21 that the lid 1 has not been opened or closed during the power-off period. In response to this, the memory controller 21 instructs the drive controller 12 to perform a startup operation according to the second startup method (Load 2 in FIG. 3).

The drive controller 12 starts the drive starting operation in the second starting operation shown in FIG. The contents are as follows.
First, from the nonvolatile memory circuit 13, the medium type of the currently loaded disc described in the operation of FIG. 2, the learning value of the recording power / phase, if it is a write once disc, information on the final recording position can be rewritten. If it is a disc, the validity of the defect management information recorded in multiple recording is read (s201). If all of this information is in place and there is no problem starting recording (s20)
2) The fact is reported to the memory controller 21 (s203). Memory controller 2
In response to this, 1 displays on the liquid crystal monitor 25 that recording is permitted (FIG. 3 Rec Pause).
)

Returning to the description of FIG. Since the type of the medium is already known from the information stored in the nonvolatile memory circuit 13, the drive controller 12 operates the spindle motor control circuit 5, the laser driver 15, and the actuator control circuit 17 in order (s204,
s205, s206, s207, s208), and the medium information can be read. If all of the medium information is stored in the nonvolatile memory circuit 13, the medium information reading process may not be performed. However, since the medium information has a certain amount of information, in the present embodiment,
The reading of the medium information is left as it is (s209).

In addition, when the medium management information is read (s210), in the case of a rewritable disc, the nonvolatile memory circuit 13 stores which of the multiplexed defect management information is valid.
It is only necessary to read one of them, and it can be completed in a short time.

In addition, with respect to the recordable disc, the consistency between the information about the final recording position recorded in the medium management information and the actual final recording position is stored in the nonvolatile memory circuit 13, so that the search process can be omitted in a short time. finish.

As described above, if the disk has been booted by the first boot method once in the past, the time required for booting can be greatly reduced. Therefore, it can be displayed on the liquid crystal monitor 25 that the recording start permission state is set (Rec Pause in FIG. 3). That is, when the second activation method is instructed to the drive controller 12, the memory controller 21 does not have any inconvenient conditions in the contents stored in the nonvolatile memory circuit 13 (for example, when activated by the first activation method). This means that the user has requested to shut off the power before the type of the medium can be determined), and the user can clearly indicate permission to start recording without waiting for the start completion report of the drive controller 12.

Returning to the description of FIG. When the user instructs the start of recording by the button switch 27 while the drive controller 12 is starting the drive by the second starting method, the system controller 22 detects this and notifies the memory controller 21 of this. To do. In response to this, the memory controller 21 starts storing the imaging signal in the memory circuit 20. As described above, since the second activation method is completed in a relatively short time, it is completed before the amount of information stored in the memory circuit 20 exceeds the first predetermined amount. The amount of storage in the memory circuit 20 is the same as the description in FIG.
The actual recording operation may be started when the predetermined amount is exceeded.

Thereafter, the remaining amount of memory gradually decreases, and the repetition of the intermittent recording operation is the same as described with reference to FIG. The operation in the case where the user gives an instruction to stop recording and then requests to shut down the entire apparatus power supply is the same as that described in FIG.

Thereafter, if the disk is not replaced while the power supply of the entire apparatus is shut off, the process of transitioning to the recordable state when the power is turned on is performed by the second startup method. It is possible to instruct to start recording without waiting for the completion of processing.

It is a block diagram for demonstrating the structure of embodiment in this invention. It is a 1st timing chart for demonstrating the operation | movement of embodiment in this invention. It is a 2nd timing chart for demonstrating operation | movement of embodiment in this invention. It is a flowchart for demonstrating the load process of the drive controller 12 of embodiment in this invention.

Explanation of symbols

2 ... lid open / close detection switch,
3 Disc,
4 ... Spindle motor,
5 ... Spindle motor control circuit,
6 ... Power ON / OFF instruction switch,
7 ... Objective lens,
8 ... Actuator mechanism,
9: Slider mechanism,
10 ... slider motor,
11 ... Slider motor control circuit,
12 ... Drive controller,
13 ... EEPROM circuit,
14 ... Laser diode,
15 ... Laser driver,
16: photoelectric conversion circuit,
17 ... Actuator control circuit,
18 ... modulation / demodulation circuit,
20: Recording / playback buffer memory circuit,
21 ... Memory controller,
22 ... System controller,
23. Imaging circuit,
24. Audio / video compression / decompression circuit,
25 ... Liquid crystal display circuit,
26: Stabilized power supply circuit,
27. Recording start / stop instruction switch,
29 ... main battery,
30: Backup battery.

Claims (5)

A camera that records captured information,
Buffer means for storing captured information;
Recording means for recording the information stored in the buffer means on a recording medium;
Power supply means for supplying power into the camera;
A power switch for instructing start of power supply from the power supply means to the recording means;
Before starting the recording of information on the recording medium by the recording means, a recording medium recognition operation is performed for acquiring related information from the recording medium to enable the recording means to record information on the recording medium. Recording medium recognition means for
Storing the related information acquired by the recording medium recognizing means, and storing the related information even when the power is turned off;
Insertion / removal monitoring means for monitoring insertion / removal of the recording medium with respect to the camera;
The related information acquired by the recording medium recognition unit last time is stored in the storage unit and power supply to the recording unit is stopped by the power supply unit. When the start of power supply to the recording medium is instructed, it is detected whether or not the recording medium has been removed by the insertion / removal monitoring means, and after the power supply to the recording means is stopped, the power supply start instruction If it is detected that the recording medium has not been removed before the recording is performed, the related information stored last time in the storage means is read out, and it is possible to record on the recording medium from the related information. if it is detected, before said recording means it is possible to record on the recording medium, permits the said buffer means store information, and, in the recording medium recognition unit Ri is omitted the determination processing medium type of the recording medium recognition operation for acquiring the related information from the recording medium and the last recording position searching process, after said recording means has become possible to record on a recording medium, The information stored in the buffer means is recorded on a recording medium, and it is detected that the recording medium has been removed and inserted after the power supply to the recording means is stopped until the start of power supply is instructed. If the recording medium recognition means, the medium type determination process and the final recording position search process in the recording medium recognition operation for acquiring related information from the inserted recording medium, without omitting, after the recording means is it possible to record on the recording medium, said buffer means is allowed to store information, and the acquired stores the related information in the storage means A control to control means so that,
A camera comprising: A camera that records captured information,
Buffer means for storing captured information;
Recording means for recording the information stored in the buffer means on a recording medium;
Power supply means for supplying power into the camera;
A power switch for instructing start of power supply from the power supply means to the recording means;
Before starting the recording of information on the recording medium by the recording means, a recording medium recognition operation is performed for acquiring related information from the recording medium to enable the recording means to record information on the recording medium. Recording medium recognition means for
Storing the related information acquired by the recording medium recognizing means, and storing the related information even when the power is turned off;
Lid opening / closing detection means for detecting opening / closing of a lid of a housing for storing the recording medium;
The related information acquired by the recording medium recognition unit last time is stored in the storage unit and power supply to the recording unit is stopped by the power supply unit. When the start of power supply to the recording unit is instructed, it is detected whether or not the lid has been opened and closed by the insertion / extraction monitoring unit, and after the power supply to the recording unit is stopped, an instruction to start power supply is issued. When it is detected that the lid has not been opened and closed by the time, the related information stored last time in the storage means is read, and it is detected from the related information that recording on a recording medium is possible. lever, wherein before the recording means it is possible to record on the recording medium, permits the said buffer means store information, and the recording medium by the recording medium recognition unit Omitted et the associated discrimination process medium type of the recording medium recognition operation information acquiring a final recording position searching process, after said recording means has become possible to record on a recording medium, said buffer means When the stored information is recorded on a recording medium and it is detected that the recording medium has been removed and inserted after the power supply to the recording means is stopped until the start of power supply is instructed, The recording medium recognition means performs the medium type determination process and the final recording position search process in the recording medium recognition operation for acquiring related information from the inserted recording medium, and the recording means performs the recording. after it possible to record the medium, control of said buffer means is allowed to store information, and controls to store the acquired the associated information in the storage means And the stage,
A camera comprising: The camera of claim 1 or 2,
The related information is a camera including a recording power of the recording means. The camera according to any one of claims 1 to 3 ,
The related information is a camera including a recordable position of a recording medium. The camera according to any one of claims 1 to 4 ,
An imaging means for capturing an image;
A microphone, and
The information recorded by the recording unit includes a camera including an image captured by the imaging unit and sound acquired by the microphone.

Images