JP2001167558A - Recorder-reproducer and recording-reproducing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely record management information on a recording medium and to surely reproduce the recorded information without losing the management information including TOC information, etc., even when the remaining capacity of a battery becomes deficient in an image pickup recording mode. SOLUTION: The information and the management information are separately recorded in different 1st and 2nd areas of a recording medium by a recording- reproducing head (S7, S10) and the recorded information is reproduced on the basis of the management information. In such a recording-reproducing method, a detection process (S9) is prepared to detect the lowering of electric power of a power supply means together with a recording process (S13) where the management data on the information under recording are recorded in the 1st area of the recording medium when the lowering of electric power of the battery is detected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording / reproducing apparatus and a recording / reproducing method, and more particularly, to an image recording / reproducing apparatus and a recording / reproducing method for recording / reproducing a moving image or a still image on a disk medium and reproducing the same. It is about.

[0002]

2. Description of the Related Art As the capacity of disk media has rapidly increased, there has been proposed an apparatus for recording and reproducing not only audio but also video signals for a long time. For example, a recording format based on a high-efficiency encoding process such as MPEG is adopted,
Techniques have been developed at the consumer level that can realize an imaging recording / reproducing apparatus for one hour or more at a compressed data rate of about Mbps to 10 Mbps. Further, with respect to the disk medium itself, there is a trend of steadily reducing the size and the capacity of the disk medium, and further increasing the density of the imaging / recording / reproducing apparatus is being promoted.

As such an apparatus, an image recording / reproducing apparatus using an encoding method such as MPEG is known. At the time of recording, after converting the image into a digital signal, the image is converted from the spatial axis to the frequency axis using DCT or the like, and the image data is further compressed by quantization and encoding processing, and then recorded on a medium such as a tape or a disk. I do.

In reproduction, error correction, decoding, and inverse quantization are performed on reproduced data read from a medium, and inverse DCT processing is performed to reproduce a video signal on a spatial axis. View.

In such an imaging / recording / reproducing apparatus, a table of content is generally used as management information indispensable for controlling a recording operation and a reproducing operation of video data on a recording medium.
nts (hereinafter referred to as TOC) is used. The TOC information is recorded in an area provided on the inner circumference side of the disk medium independently of the area where the normal video data is recorded when the captured image data is recorded on the disk medium. Also, at the time of the reproducing operation, the imaging recording / reproducing apparatus reads out the TOC information from the disk medium and stores the TOC information in a memory or the like.
Based on the information, it controls various operations such as access position to image data and video scene management.

FIG. 9 is a conceptual diagram showing an example of radial division of a recording / reproducing area on a disk medium. As shown in FIG. 9, the video data is recorded in an area (video recording area) provided near the center in the radial direction of the disk medium, and the TOC is recorded.
The information is stored in an area (system information management area) provided on an inner peripheral portion of the image recording area. It should be noted that recording outside the disk is not allowed.

[0007]

In the conventional imaging recording / reproducing apparatus, the TOC information is recorded on the recording medium after the writing of the captured video data to the medium is completed, and the end pointer of the recorded video ( After the address is determined, various information including the end pointer and the start pointer is recorded as TOC information.

In a system using a disk medium, since data access to the disk medium can be performed at high speed, recording or reproduction access to the disk medium is usually performed intermittently. At the time of such a disk access operation and at other times, there is a large difference in power consumption such as motor drive, head drive, and writing laser power.

Therefore, in a case where a series of recording operations are performed by driving a battery using a conventional imaging recording / reproducing apparatus, a sudden increase in power consumption at the time of accessing a disk causes a decrease in a battery supply voltage, and the recording operation of the system can be performed. May disappear.

In particular, as can be seen from FIG. 9, when recording TOC information, the write / read processing is performed after moving the recording / reproducing head mechanism to an inner peripheral area at a position distant from the video recording area for recording video data. For this reason, when the remaining battery power is only such that the recording operation of the video data can be barely stopped, there is a danger that, in the worst case, the TOC information cannot be written.

If the TOC information is missing, the start pointer, end pointer, attributes, etc. of the recorded video data become unknown, and the reproduction control of the disk medium cannot be performed.

[0012] The present invention has been made in view of the above problems, and does not lose management information such as TOC information even when the remaining battery power becomes insufficient during imaging and recording.
An object of the present invention is to provide an imaging recording / reproducing apparatus and a recording / reproducing method capable of reliably recording and reproducing management information on a recording medium.

[0013]

In order to achieve the above object, information and management information are separately recorded in different first and second areas on a recording medium by a recording / reproducing means, and based on the management information. A recording / reproducing apparatus according to the present invention, which reproduces the information by detecting the power reduction of a power supply unit that supplies power, and a management data of the information being recorded when the detection unit detects the power reduction. And control means for controlling the recording / reproducing means so as to record the data in the first area.

A recording / reproducing method according to the present invention, wherein information and management information are separately recorded in different first and second areas on a recording medium by recording / reproducing means, and the information is reproduced based on the management information. Comprises a detecting step of detecting a decrease in power of the power supply means, and a recording step of recording management data of information being recorded in the first area when the decrease in power is detected in the detecting step.

According to a preferred aspect of the present invention, the management information includes update information indicating whether the management information has been updated or not updated with the recording of the information. When the update is indicated, the information processing apparatus further includes a search unit that searches for management data from the first area, and an update unit that updates the management information based on the management data searched by the search unit. Also, the method further includes a search step of searching for management data from the first area when the update information indicates that the management information has not been updated, and an update step of updating the management information based on the searched management data.

According to a preferred aspect of the present invention, the update information is changed so as to indicate that it has not been updated before recording the information, and the management information is updated after the information is recorded or after the update of the management information. And updating means for changing the update information so as to indicate the update after the update by the means.
A step of changing the update information so as to indicate that the information has not been updated prior to the recording of the information; and the update information indicating the update after the update of the management information accompanying the recording of the information or after the update by the update step. And a changing step as described above.

[0017] Preferably, the update information is a flag.

According to a preferred aspect of the present invention, the detecting means controls the recording / reproducing means from a first area to a second area.
When power that can be driven up to the region does not remain in the power supply unit, a power drop is detected, and in the detection step,
If there is no remaining power for driving the recording / reproducing means from the first area to the second area, a decrease in power is detected.

Preferably, the control information includes a TOC.
(Table Of Contents).

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
1 shows an imaging recording / playback apparatus according to the embodiment. Referring to FIG. 1, reference numeral 101 denotes an optical unit including a lens and a lens control unit; 102, an imaging processing unit; 103, an A / D converter;
4 is a camera signal processing unit, 105 is a video signal processing unit, 1
06 is a D / A converter, 107 is an analog video signal output unit, 108 is a display unit, 109 is a data bus, 110 is a memory, 111 is a memory control unit, 112 is a CPU, 113
Denotes a disk unit, and 114 denotes a power supply unit such as a battery. In FIG. 1, the power supply unit 1 is shown for simplification of the drawing.
Although 14 is shown to be connected only to the CPU 112, it is configured so that power is supplied to necessary parts in practice via a power supply line.

In the imaging recording / reproducing apparatus having the above configuration,
Aperture control, focus control, zoom control, and the like are performed in an optical unit 101 including a lens, and an image of a subject (not shown) is photoelectrically converted by an imaging processing unit 102 using a CCD (charge imaging device) or the like. It is digitized by the A / D converter 103. The camera signal processing unit 104 performs predetermined data processing such as gamma correction and white balance adjustment on the digitized image data.

The video signal processing unit 105 is connected to the data bus 1
On 09, the captured image data is divided into blocks composed of a plurality of pixels, an orthogonal transform operation such as DCT is performed, and a quantization process and an encoding process are further performed. In general, in moving image data, a change between two consecutive frames is small, and a target image and a frame image before and after the target image have a high correlation. By utilizing this, the difference between the image of interest and the images of the frames before and after the image of interest is encoded to perform image compression. In addition, an MPE that performs motion compensation to reduce the redundancy in the time axis direction, obtains a difference between images, and performs orthogonal transform such as DCT and variable length coding on the obtained difference data.
The G method is mainstream.

The D / A converter 106 is a video signal processing unit 1
The digital video signal output from 05 is converted to analog,
The video signal output unit 107 converts the signal into a signal according to a television system such as NTSC or PAL and outputs the signal. The display unit 108 includes a viewfinder, a liquid crystal monitor, or the like, and can monitor an image being captured or reproduced based on an analog video signal output from the D / A converter 106.

When recording the captured video on a disk medium, the digital video signal output from the video signal processing unit 107 is also supplied to the disk unit 113, converted into a format suitable for recording, and Recorded above. When displaying an image recorded on the disk medium, the image data is read from the disk medium set in the disk unit 113, supplied to the D / A converter 106 via the video signal processing unit 105, After being converted, it is output to the video signal output unit 107 and / or the display unit 108.

The CPU 112 controls the overall control of the system via the data bus 109,
Each parameter in the imaging processing unit 102, the camera signal processing unit 104, and the video signal processing unit 105 is controlled. Further, the memory control unit 111 performs memory control necessary for each signal processing on the memory 110 based on the control of the CPU 112.

Next, a configuration example of the disk unit 113 will be described with reference to FIG.

In FIG. 2, reference numeral 201 denotes a magneto-optical disk,
202 is a magnetic head, 203 is a magnetic head driver,
214 is an optical pickup unit, and 205 is a preamplifier.

The disk 201 has a disk motor 208
, And the magnetic head 202 and the optical pickup 214 can be moved in the disk radial direction by the sled mechanism 210.

The optical pickup section 214 irradiates a laser beam to the disk 201 from a semiconductor laser element (not shown) such as a laser diode at the time of recording. At the same time, video data input via the interface 207 is encoded by the encoder 204,
The driver 203 drives the magnetic head 202 with a drive signal modulated based on the encoded data. In response to the modulation drive signal, the magnetic head 202
01 is subjected to magnetic field modulation to perform recording.

At the time of reproduction, the pickup 214 irradiates the disk 201 with a laser beam from a semiconductor laser element (not shown), detects the amount of polarization of reflected light due to the magnetic Car effect, and supplies a reproduction signal to the preamplifier 205.
The signal output from the preamplifier 205 is
6 and is output to the video signal processing unit 105 of FIG.

The DC motor 211 has a thread mechanism 2
10 is driven. A servo digital signal processing unit (DSP) 213 controls the rotation speed of the disk and the servo control of the sled mechanism 210 by the motor driver 209 and the servo driver 212. More specifically, there are a disk rotation servo, a pickup focus servo, a tracking servo, a seek servo, and the like.

The bus I / F 207 is connected to the data bus 1 in FIG.
The recording / reproducing data is transmitted / received to / from the encoder 09, and the input / output of data is controlled by the encoder 204 during recording and to the decoder 206 during reproduction. Encoder 20
Reference numeral 4 denotes a unit for applying a predetermined modulation to the recording data, and the decoder 206 demodulates the reproduction signal from the preamplifier 205.

Next, the file (TOC data) structure in the first embodiment will be described.

FIG. 3 shows a file / directory structure of the imaging / recording / reproducing apparatus. In FIG.
01 is the disk medium itself, which is defined as the highest level 0. In the lower layer 1, application attributes such as video 302, audio 303, still image 304,... Can be classified. Further, in the lower layer 2 of any of the files defined in the layer 1 (the video 302 is taken as an example in FIG. 3), for example, video A305, video B306, video C307,... . Subsequently, in layer 3 below any of the files defined in layer 2 (in FIG. 3, video A 305 is taken as an example), the trigger button is turned ON / OF.
Scene 1 (308), scene 2 separated by F
(309), scene 3 (310),... Further, in the lower layer 4 of any file defined in the layer 3 (in FIG. 3, the scene 1 (308) is taken as an example), the imaging start pointer 31 in the scene 1
1 (address information), a shooting end pointer 312 (address information), and a link pointer 313 (address information) that can be jumped by editing / reproduction or the like.

FIG. 4 shows a specific example of the TOC of the imaging / recording / reproducing apparatus having such a directory structure. FIG.
Is a diagram showing the structure of the TOC, for example, a TOC identification header portion composed of all zeros or all ones;
The information is roughly divided into a system information table, a management information table section, and the like. For each item, a start pointer, an attribute, an end pointer, a link pointer, and the like can be defined in units of several bytes.

As an example, the reproduction control of the files in the directory hierarchy 3 shown in FIG. 3 will be described with reference to FIGS. 4 and 9. First, the video recording on the disk medium indicated by the start pointer A at address 0001 in the management information table section is described. The reproduction is started from the address of the area, and after the data recorded up to the address indicated by the end pointer B is continuously reproduced, the program jumps to the AAAA address indicated by the link pointer. Then, the reproduction starts from the address of the video recording area on the disk medium indicated by the start pointer C, and ends when the data recorded to the address indicated by the end pointer D is completely reproduced. At this time,
The link pointer 0000 at the address AAAA is an index indicating the end of reproduction. Reproduction control of each scene is based on attribute information.

In the first embodiment of the present invention, FIG.
As shown in the figure, the U flag (Urgen
cy Flag). The U flag is 1-bit logical information for checking whether or not the TOC of the inner peripheral area is the latest. The use of the U flag will be described later in detail.

FIG. 5 shows a configuration example of the power supply unit 114 shown in FIG. In the present invention, the power supply unit 114 includes a power reduction detection unit, and monitors and detects a decrease in power. In FIG. 5, 501 is a battery, 502 and 503 are DC-Ds.
C converters 504, 505, 506 and 507 are resistors for voltage division, and 508 and 509 are comparators.

The power from the battery 501 is DC-DC
After being converted into a predetermined voltage by the converter 502, the voltage is supplied to each circuit of the imaging recording / reproducing apparatus. On the other hand, a configuration below the DC-DC converter 503 is provided to detect a decrease in power. The output voltage of the DC-DC converter 503 is set to a first threshold value (Th1) by resistors 504 and 505.
Is changed to a second threshold value (Th2) by the resistors 506 and 507.
The pressure is divided so as to obtain Note that Th1> Th
2. Comparator 508 determines whether battery voltage 501 and Th
1 are compared, and when the battery voltage becomes equal to or less than Th1, an instruction to perform a power reduction warning display is issued. The comparator 509 compares the battery voltage 501 with Th2, and determines that the battery voltage is Th2.
When the value is 2 or less, an instruction is given to cut off the power supply.

Next, the operation of the imaging / recording / reproducing apparatus having the above configuration according to the first embodiment of the present invention will be described with reference to FIG.

First, in step S1, power is applied to the imaging / recording / reproducing apparatus. After power-on, step S2
Then, the U flag of the TOC is checked. In the first embodiment, when the U flag is “0”, it indicates that the TOC has been rewritten after the previous image recording and is the latest,
If the U flag is "1", the TOC
Indicates that has not been updated. If the U flag is "0" in step S2, the process waits for a processing instruction in steps S3 and S4. If the instructed process is not an instruction to start recording (YES in step S4), a corresponding process is performed in step S5.

When the start of recording is instructed (YES in step S3), the U flag is set to "1" indicating that the TOC has not been updated in step S6. Then, while performing the recording process in step S7,
In step 8, the monitoring result by the power reduction detection unit of the power supply unit 114 is always checked.

When it is detected in step S8 that the battery supply limit and the voltage have fallen below the predetermined voltage Th1, the process proceeds to step S12, where the recording of the picked-up image is stopped, and the emergency save of the TOC information is performed in step S13.
This is because the head mechanism of the disk unit 113 that is recording in the video recording area shown in FIG. 9 is continuously moved to the rear end of the image data without moving the thread to the system information management area secured on the inner circumference of the disk medium. A process for writing the TOC information is performed. In step S13, the TOC
After performing the data recording process, wait for the next instruction.

If the recording stop instruction is given in step S9 without reaching the battery supply limit (NO in step S8), the head mechanism is moved to the system information management area on the inner circumference of the disk medium in step S10. Move the thread and write TOC information. Step S1
At step 1, the U flag is set to "0" indicating update, and a series of recording processes is completed, and the next instruction is waited for.

On the other hand, in step S2, the U flag is set to T
If the OC has been set to "1" indicating that it has not been updated, the process proceeds to step S14.

In this case, since the TOC is not updated to the latest information, the video recording area is searched sequentially from the position indicated by the last end pointer of the latest TOC information recorded in the system information management area, and Read the TOC information. In step S15, the TOC in the system information management area, which is the original recording area of the TOC information, is updated based on the read information. Then, step S1
After setting the U flag to "0" in step 6, the process proceeds to step S3, and the above-described processing is performed.

The above operation is continued until the power is turned off or until the battery voltage becomes lower than Th2 and an instruction to cut off the power supply is received from comparator 509 shown in FIG.

As described above, according to the first embodiment, the TOC information can be reliably recorded even when the battery voltage drops during recording.

(Second Embodiment) Next, a second embodiment will be described. The imaging / recording / reproducing apparatus according to the second embodiment has the same configuration as the imaging / recording / reproducing apparatus described in FIGS. 1, 2, and 5 in the first embodiment, and thus the description is omitted.

In the second embodiment, the structure of the TOC is configured as shown in FIG. 7, and the save information can be described in the MSB in the attribute data of the management information table.

Next, the operation of the imaging / recording / reproducing apparatus according to the second embodiment of the present invention will be described with reference to FIG.

First, in step S1, power is applied to the imaging / recording / reproducing apparatus. After power-on, step S21
Then, all the MSBs of the TOC attribute recorded are checked. In the second embodiment, the MSB of the attribute
Is "0", indicating that the TOC has been rewritten after the previous image recording and is the latest, and that the MSB of the attribute is "1" indicates that the TOC has not been updated since the previous image recording. If the MSB of the attribute is "0" in step S21, the process waits for a processing instruction in steps S3 and S4. If the instructed process is not an instruction to start recording (YES in step S4), a corresponding process is performed in step S5.

When the start of recording is instructed (YES in step S3), the MSB of the attribute data is set to "1" indicating that the TOC has not been updated only for the video being recorded in step S22. Thereafter, while performing the recording process in step S7, the power supply 114
The monitoring result is always checked by the power reduction detection unit. In addition,
The monitoring by the power reduction detecting unit is performed in the same manner as the method described with reference to FIG. 5 in the first embodiment.

When it is detected in step S8 that the battery supply limit and the voltage have fallen below the predetermined voltage Th1, the process proceeds to step S12, where the recording of the picked-up image is stopped, and the emergency save of the TOC information is performed in step S13.
This is because the head mechanism of the disk unit 113 that is recording in the video recording area shown in FIG. 9 is continuously moved to the rear end of the image data without moving the thread to the system information management area secured on the inner circumference of the disk medium. A process for writing the TOC information is performed. In step S13, the TOC
After performing the data recording process, wait for the next instruction.

If the recording stop is instructed in step S9 without reaching the battery supply limit (NO in step S8), the head mechanism is moved to the system information management area on the inner circumference of the disk medium in step S10. Move the thread and write TOC information. Step S2
In step 4, the MSB of the attribute of the TOC non-updated image is set to “0” indicating update, and a series of recording processes is completed, and the next instruction is waited.

On the other hand, in step S21, the attribute MS
If B is set to “1” indicating that the TOC has not been updated, the process proceeds to step S14.

In this case, since the TOC has not been updated to the latest information, the attribute data of the TOC in the predetermined area is sequentially searched to search for the video whose save information is "1".
Read the latest TOC information. In step S15, the TOC in the system information management area, which is the original recording area of the TOC information, is updated based on the read information. Then, in step S85, the MSB of the attribute is set to "0", and the process proceeds to step S3 to perform the above-described processing.

The above operation is continued until the power is turned off or until the battery voltage becomes lower than Th2 and an instruction to cut off the power supply is received from comparator 509 shown in FIG.

As described above, according to the second embodiment, even when the battery voltage drops during recording, the TOC information can be reliably recorded and reproduced.

In the first and second embodiments, the imaging recording / reproducing apparatus has been described. However, the present invention is not limited to this. Main information and its management information are stored in separate areas on a recording medium. The present invention can be applied to any device that records separately.

[0062]

[Other Embodiments] The present invention may be applied to a system constituted by a plurality of devices or to an apparatus constituted by a single device.

Further, an object of the present invention is to supply a storage medium (or a recording medium) in which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or an apparatus, and a computer (a computer) of the system or the apparatus. Or a CPU or MPU) reads out and executes the program code stored in the storage medium,
Needless to say, this is achieved. In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.
In addition, by the computer executing the readout program code, not only the functions of the above-described embodiments are realized, but also based on the instructions of the program code,
The operating system (OS) running on the computer performs part or all of the actual processing,
It goes without saying that a case where the function of the above-described embodiment is realized by the processing is also included.

Further, after the program code read from the storage medium is written into the memory provided in the function expansion card inserted into the computer or the function expansion unit connected to the computer, the program code is read based on the instruction of the program code. Needless to say, the CPU included in the function expansion card or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

When the present invention is applied to the storage medium, the storage medium stores program codes corresponding to the above-described flowcharts shown in FIG. 6 or FIG.

[0066]

As described above, according to the present invention, even when the remaining battery power becomes insufficient during image recording, the management information is securely recorded on the recording medium without losing the management information such as the TOC information. In addition, it is possible to provide a reproducible imaging / recording / reproducing apparatus and a recording / reproducing method.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an imaging recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a disk unit according to the embodiment of the present invention.

FIG. 3 is a diagram showing a file / directory structure of the imaging recording / reproducing apparatus according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating a TOC data structure of the imaging recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 5 is a block diagram illustrating a configuration of a power supply unit according to the embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation of the imaging recording / reproducing apparatus according to the first embodiment of the present invention.

FIG. 7 is a diagram illustrating a TOC data structure of an imaging recording / reproducing device according to a second embodiment of the present invention.

FIG. 8 is a flowchart illustrating an operation of the imaging recording / reproducing apparatus according to the second embodiment of the present invention.

FIG. 9 is a diagram showing data allocation of a disk medium.

Claims (13)

[Claims] 1. A recording / reproducing apparatus which records information and management information separately in different first and second areas on a recording medium by recording / reproducing means, and reproduces the information based on the management information. Detecting means for detecting a decrease in power of a power supply means for supplying electric power, and when the decrease in power is detected by the detection means, the management data of the information being recorded is recorded in the first area. A recording / reproducing apparatus comprising: a control unit for controlling the recording / reproducing unit. 2. The management information includes update information indicating whether the management information has been updated or not updated with the recording of the information. When the update information indicates unupdated, the first area 2. The recording / reproducing apparatus according to claim 1, further comprising: a search unit that searches for management data from the server; and an updating unit that updates the management information based on the management data searched by the search unit. 3. The method according to claim 1, wherein the update information is changed before the recording of the information so as to indicate that the update information has not been updated, and the update information is updated after the update of the management information accompanying the recording of the information or the update by the update unit. 3. The recording / reproducing apparatus according to claim 2, further comprising update information changing means for changing the information as shown. 4. The recording / reproducing apparatus according to claim 2, wherein the update information is a flag. 5. The method according to claim 1, wherein the detecting unit detects a decrease in power when the power for driving the recording / reproducing unit from a first area to a second area does not remain in the power supply unit. The recording / reproducing apparatus according to any one of claims 1 to 4, wherein: 6. The control information includes a table of control (TOC).
ents). The recording / reproducing apparatus according to any one of claims 1 to 5, wherein 7. A recording / reproducing method in which information and management information are separately recorded in different first and second areas on a recording medium by recording / reproducing means, and the information is reproduced based on the management information. A detecting step of detecting a decrease in power of the power supply unit; and a recording step of recording management data of information being recorded in the first area when detecting a decrease in power in the detecting step. Recording / reproducing method characterized by the above-mentioned. 8. The management information includes update information indicating whether the management information has been updated or not updated with the recording of the information, and when the update information indicates unupdated, the first area 8. The recording / reproducing method according to claim 7, further comprising: a search step of searching for management data from the server; and an updating step of updating the management information based on the searched management data. 9. A step of changing the update information so as to indicate that it has not been updated prior to recording of the information, and after the update of the management information accompanying the recording of the information or the update by the update step, the update information 9. The recording / reproducing method according to claim 8, further comprising a step of performing a change to indicate an update. 10. The recording / reproducing method according to claim 8, wherein the update information is a flag. 11. The method according to claim 7, wherein in the detecting step, when there is no remaining power for driving the recording / reproducing means from the first area to the second area, a decrease in power is detected. 10. The recording / reproducing method according to any one of 10 above. 12. The control information includes a TOC (Table Of Co
12. The recording / reproducing method according to claim 7, wherein the recording / reproducing method comprises: 13. A storage medium for storing a program code for realizing the recording / reproducing method according to claim 7. Description: