JP2000215644A - Video recording/reproducing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve probability for reading out video information even if a storage medium is damaged by recording the updated directory information and file system information for each recording of one video file. SOLUTION: A virtual assignment table is formed for each information control block ICB and a file identifier FID and is updated each time when various information pieces are recorded in the recording/reproducing apparatus. Namely, each time when one video information (video file) is recorded in the storage medium, the information control block ICB of such video file, directory information to which such video file belongs, information control block ICB of such directory, newly updated virtual assignment table and its information control block ICB are also recorded in the storage medium. When this latest assignment table is obtained, the file identifier FID and information control block ICB corresponding to all video information pieces recorded in the storage medium can be obtained and all video information pieces can be reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a write-once recording apparatus, which records a large number of image information on a storage medium of the write-once recording apparatus and reproduces the image information recorded on the storage medium. Related to the device.

[0002]

2. Description of the Related Art Conventionally, a write-once recording device such as a CD-R device is provided, and a large number of image information is recorded on a storage medium of the write-once recording device, and the image information recorded on the storage medium is reproduced. An image recording / reproducing apparatus has been put to practical use.

For example, a digital still camera that reads data of a memory card used as a storage medium and writes a plurality of pieces of image information stored in the memory card to a storage medium of a write-once type recording apparatus has been put to practical use. .

[0004]

However, in such a conventional apparatus, since a plurality of image information are written at once to a storage medium of a write-once type recording apparatus, they are referred to when accessing the stored plurality of image information. The file system information is recorded on the storage medium before or after the writing of the image information every time the plurality of image information is written.

Here, when a storage medium such as a CD-R, which is used in a bare state and is not housed in a case, is used as a storage medium, the surface of the recording surface may be fine depending on the handling of the user. The information recorded on the storage medium may not be able to be partially reproduced.

If a situation occurs where the file system information recorded on the storage medium cannot be reproduced, there arises a problem that a plurality of pieces of image information managed by the file system information cannot be reproduced.

The present invention has been made in view of the above circumstances, and provides an image recording / reproducing apparatus which can improve the probability that image information can be read even when a scratch is formed on a storage medium or dust adheres. It is intended to be.

[0008]

According to the present invention, there is provided a write-once type recording apparatus which records a large number of image information on a storage medium of the write-once type recording apparatus and reproduces the image information recorded on the storage medium. The recording / reproducing apparatus has a recording control means for recording one piece of image information on the storage medium and also recording file system information necessary for accessing the image information on the storage medium.

An image recording / reproducing apparatus which includes a write-once recording apparatus and records a large amount of image information on a storage medium of the write-once type recording apparatus and reproduces the image information recorded on the storage medium. When the information is recorded on the storage medium, file system information necessary for accessing the image information is also recorded on the storage medium,
Recording control means for recording the address information of the file system information in the storage medium every time the recording data amount reaches a predetermined data length.

An image recording / reproducing apparatus which has a write-once recording apparatus and records a large amount of image information on a storage medium of the write-once type recording apparatus and reproduces the image information recorded on the storage medium has one image. When the information is recorded on the storage medium, file system information necessary for accessing the image information is also recorded on the storage medium,
Recording control means for recording the address information of the file system information on the storage medium every time the recording data amount reaches a predetermined data length; and when reading information from the storage medium, starting from the last write area of the storage medium Heading toward the area, the data is read out for each of the predetermined data lengths, the address information of the file system information is searched, and when the address information is found, the file system information is read by referring to the found address information, It is provided with reproduction control means for reproducing image information based on system information.

An image recording / reproducing apparatus provided with a write-once recording apparatus for recording a large amount of image information on a storage medium of the write-once type recording apparatus and reproducing the image information recorded on the storage medium has one image. When the information is recorded on the storage medium, file system information necessary for accessing the image information is also recorded on the storage medium,
Recording control means for recording the address information of the file system information on the storage medium every time the recording data amount reaches a predetermined data length; and when reading the information from the storage medium, starting from the last write area of the storage medium to the beginning. Heading toward the area, the data is read out for each of the predetermined data lengths, the address information of the file system information is searched, and when the address information is found, the file system information is read by referring to the found address information, Playback control means for playing back image information based on system information, wherein when the write operation of the image information by the recording control means fails, the playback control means reads the data length at a time to search for the address information. The amount of data written in the failed write operation or The is obtained so as to determine on the basis of the data amount.

The file system information is updated each time image information is recorded on the storage medium, and the file system information recorded last on the storage medium is all image information recorded on the storage medium. Contains the contents for accessing the respective image information. For example, the file system information is a virtual allocation table.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described in detail.

FIG. 1 shows an image recording / reproducing apparatus according to an embodiment of the present invention.

In FIG. 1, an image data input unit 1 is for inputting image data from the outside. The image data input from the image data input unit 1 is input to an input image processing unit 2 and a switching unit. One switching terminal 3a of the device 3 is added.

The input image processing unit 2 converts the input image data into a thumbnail image creating process for creating a thumbnail image as a reduced image, and a resolution conversion for converting the input image data into a display resolution of an image display device (described later). Magnification processing) processing, thumbnail file creation processing for creating a thumbnail file including a plurality of created thumbnail images,
The output signal is applied to one switching terminal 3b of the switching device 3 and one switching terminal 5a of the switching device 6, respectively.
The buffer memory 4 is used as a work area of the input image processing unit 2.

The other switching terminal 3c of the switching device 3 includes:
Image data output from an edit processing unit 6 (described later) is added. The switch 3 switches the image data applied to the switching terminals 3a, 3b, 3c, and the output signal is applied to the recording signal processing unit 7.

The recording signal processing section 7 is for converting the image data input via the switch 3 into image data of a predetermined format recordable by the recording / reproducing device 8. In addition to recording image data (image information) and file system information on a large-capacity write-once storage medium such as a CD-R, it reproduces various information recorded on the storage medium.

The reproduction signal processing unit 9 converts a signal reproduced from the recording / reproduction device 8 into original image data. The reproduction data output from the reproduction signal processing unit 9 The other switching terminal 5 b and the printing device 10 are added.

The switch 5 switches between input image data output from the input image processing unit 2 and reproduced image data output from the reproduction signal processing unit 9, and the output data is , And the editing processing unit 6.

The edit processing unit 6 applies various image processing such as image quality adjustment, color conversion, trimming processing, image enlargement / reduction processing, and the like to input image data. It is added to the switching terminal 3 c of the device 3, the image display control unit 11, and the printing device 10.

The printing apparatus 10 prints out either a reproduced image output from the reproduced signal processing section 9 or a display image output from the editing processing section 6 on recording paper.

The image display control unit 11 converts the reproduced image data output from the editing processing unit 6 into a display signal to be displayed on the image display device 12. , A CRT display device, and the like.

The operation display section 13 comprises various operation keys and various display devices for operating the image recording / reproducing apparatus. The main control section 14 controls the operation of each section of the image recording / reproducing apparatus. It is.

At the time of image recording, when the user operates the operation display unit 13 to instruct direct input, the main control unit 14
Causes the switch 3 to select the switching terminal 3a,
Image data input from the image data input unit 1 is added to the recording signal processing unit 7 via the switch 3 and is recorded on the recording / reproducing device 8.

When recording an image, the user operates the operation display unit 1.
3 is operated to instruct the conversion input, the main control unit 14
Causes the switch 3 to select the switching terminal 3b,
Image data (including thumbnail image data) output from the input image processing unit 2 is added to the recording signal processing unit 7 via the switch 3 and is recorded in the recording / reproducing device 8.

In recording an image, the user operates the operation display unit 1.
3, the main control unit 14 causes the switch 3 to select the switching terminal 3c, thereby causing the switching unit 3 to select the switching terminal 3c. The image data is added to the recording signal processing unit 7 via the switch 3 and recorded on the recording / reproducing device 8.

When the user operates the operation display unit 13 to select the display of the input image, the main control unit 14
Causes the switch 5 to select the switching terminal 5a,
Image data (including thumbnail image data) output from the input image processing unit 2 is added to the editing processing unit 6 via the switch 5, and the editing process specified by the user is applied.
The result is displayed on the image display device 12.

When the user operates the operation display unit 13 to select display of a reproduced image, the main control unit 14
Causes the switch 5 to select the switching terminal 5b,
The reproduction image data output from the reproduction signal processing unit 9 is added to the editing processing unit 6 via the switch 5, the editing process specified by the user is applied, and the result is displayed on the image display device 1.
2 is displayed.

When the user operates the operation display unit 13 to give an instruction to print a reproduced image, the main control unit 14
Instructs the printing apparatus 10 to print a reproduced image, whereby the printing apparatus 10 records and outputs an image of the reproduced image data output from the reproduction signal processing unit 9.

When the user operates the operation display unit 13 to give an instruction to print a display image, the main control unit 14
Instructs the printing apparatus 10 to print a display image, and the printing apparatus 10 records and outputs an image of the display image data output from the editing processing unit 6.

In the present embodiment, the storage medium of the recording / reproducing apparatus 8 stores JIS X 0607 and OS
The recording and reproduction of information is performed by applying a file system according to the TA universal disk format specification.

In this file system, basically,
A tree-structured file system as shown in FIG. 2 is employed, and each file is accommodated in one of hierarchically structured directories.

In the case of the figure, three files, file 1, file 2 and file 3, are recorded, and file 1 and one-level lower subdirectory SD belong to the root directory RD which is the highest directory. File 2 and file 3 belong to the subdirectory SD.

In this case, various information as shown in FIG. 3 is created as the file system information.

Here, the information control block ICB (Inf
The operation control block is for storing data such as the actual address of the entity of the target data.

The file identification descriptor FID (Fil)
e Identifier Descriptor)
Is for storing information such as the attribute of the data pointed to by the ICB and the identification information of the column storing the virtual address of the corresponding ICB in the virtual allocation table VAT described later.

Further, regarding each information control block ICB and file identification descriptor FID in FIG. 3, a virtual allocation table VAT (Virtual Allocat) as shown in FIG.
ion table) is formed.

The virtual allocation table VAT forms the basis of this file system. In this case, each column 0, 1,
Reference numerals 2, 3, and 4 denote the address information of the root directory ICB indicating the real address of the root directory RD, the address information of the subdirectory ICB indicating the real address of the subdirectory SD, and the address of the file 1 ICB indicating the real address of the file 1, respectively. Information, file 2
Address information of file 2 ICB indicating the real address of
And a file 3IC indicating a real address of the file 3
B corresponds to the address information.

The subdirectory FID stores the identification information of the column (column 1) corresponding to the subdirectory 1ICB in the virtual allocation table VAT, and stores the file 1FID.
Stores the identification information of the column (column 2) corresponding to file 1 ICB in the virtual allocation table VAT,
D stores the identification information of the column (column 3) corresponding to file 2ICB in the virtual allocation table VAT,
ID is the file 3ICB in the virtual allocation table VAT.
Is stored in the column (column 4) corresponding to.

Therefore, if the virtual allocation table VAT can be obtained, the file identification descriptor FID and the information control block ICB recorded on the storage medium of the recording / reproducing device 8 can be read, and the file identification descriptor FID and the information control block can be read. Image information can be appropriately read based on the block ICB.

The virtual allocation table VAT is updated every time various information is recorded in the recording / reproducing device 8, and always shows the latest recorded contents. Therefore, if the latest (that is, the last recorded) virtual allocation table VAT recorded on the recording / reproducing device 8 can be obtained, the file identification descriptor FID corresponding to all the image information recorded on the storage medium And the information control block ICB can be obtained, and as a result, all image information can be reproduced.

As described above, in this embodiment, if the virtual allocation table VAT can be obtained, the image information recorded on the storage medium of the recording / reproducing apparatus 8 can be reproduced. Image recording with high image quality can be realized.

Therefore, in this embodiment, every time one piece of image information (image file) is recorded on the storage medium of the recording / reproducing device 8, the information control block IC
B, directory information of a directory to which the image file belongs and an information control block IC of the directory
B, the newly updated virtual allocation table VAT, and the information control block ICB of the virtual allocation table are also recorded in the storage medium.

As a result, the image information that cannot be reproduced when one virtual allocation table VAT cannot be reproduced remains at the latest one, thereby enabling more reliable image recording.

FIG. 5 shows an example of the information recording mode on the storage medium in this case. In the figure, V0 is a virtual allocation table VAT that records information of only the root directory,
VnI is the information control block ICB of the n-th virtual allocation table VAT, Fn is the entity (data itself) of the n-th file, FnI is the information control block ICB of the n-th file, and Dn Is the entity of the nth directory, and DnI is the information control block ICB of the nth directory.

Therefore, when one file Fn is recorded, the corresponding information control block FnI is recorded,
The updated directory Dn is recorded, the corresponding information control block DnI is recorded, the updated virtual allocation table VAT is recorded, and the corresponding information control block VnI is recorded.

FIG. 6 shows a schematic example of the recording process in this case.

If there is a file to be added (the result of judgment 101 is YES), the file entity is recorded (step 10).
2) The information control block FnI of the file is recorded (step 103), and the directory D updated at that time is recorded.
n (process 104), the information control block DnI of the directory is recorded (process 105), and the virtual allocation table VAT updated at that time is recorded (process 106).
The information control block VnI of the virtual allocation table VAT is recorded (process 107).

As described above, in this embodiment, each time one image file is recorded, the updated directory information and the updated file system information are recorded, so that one file system information can be reproduced. The image information that cannot be reproduced if there is no such information remains at the latest one, thereby enabling more reliable image recording.

In the above-described embodiment, every time one image file is recorded on the storage medium of the recording / reproducing apparatus 8,
The information control block ICB of the image file, the directory information of the directory to which the image file belongs, the information control block ICB of the directory, the newly updated virtual allocation table VAT, and the virtual allocation table VA
Although the information control block ICB of T is also recorded on the storage medium, the recording position of the information control block ICB of the virtual allocation table VAT is changed every time data of a fixed number of recording blocks is recorded. If additional address information is recorded, it is possible to record images with higher reliability.

Here, the recording block indicates a recording unit of data in the storage medium of the recording / reproducing device 8.

FIG. 7 shows a mode of recording data on a storage medium according to another embodiment of the present invention. Here, each segment in the figure represents a segment of a recording block, and N in the figure represents the number of recording block intervals of address information indicating the recording position of the information control block ICB of the latest virtual allocation table. M indicates the number of remaining blocks when the number of recording blocks of the recorded data is less than N during the immediately preceding data recording.

In this case, N = 3, and the address information VnIA indicating the recording position of the information control block VnI of the latest (n-th) virtual allocation table Vn is recorded at intervals of three blocks.

As described above, in this embodiment, the fixed number N
Each time the data of the recording block is recorded, the address information indicating the recording position of the information control block ICB of the virtual allocation table VAT is added and recorded. The number of times of data access for finding the information control block VnI in the allocation table Vn can be significantly reduced, and as a result, the process of restoring the contents of the storage medium can be executed quickly.

FIG. 8 shows a schematic example of processing at the time of recording in this case.

If there is a file to be added (the result of decision 201 is YES), it is checked whether or not the value of M is equal to 0 (decision 202). When the result of the determination 202 is YES, it is the recording timing of the address information VnIA,
The address of the information control block VnI of the latest virtual allocation table Vn is acquired and recorded as address information VnIA (process 203). For the file to be added at that time, the image file Fn and the information control block FnI of the image file Fn are added. , The directory information Dn of the directory to which the image file Fn belongs, the information control DnI of the directory, the newly updated virtual allocation table Vn, and the information control block VnI of the virtual allocation table, by the number of recording blocks (N- The data amount corresponding to 1) is recorded on the storage medium (process 204). At this time, when the number of recorded blocks is less than (N−1), the number of remaining blocks is substituted for M, and when the number of recorded blocks matches (N−1), 0 is substituted for M. I do.

Then, it is checked whether or not the recording of all the information has been completed for the file to be additionally written at this time (decision 205).
Returning to the decision 202, the remaining information is recorded.

When the result of the determination 202 is NO, the address information VnIA is not recorded at this time, and the file to be additionally written at that time is stored in the image file Fn and the information control block Fn of the image file Fn.
I, directory information Dn of a directory to which the image file Fn belongs and information control Dn of the directory
I and the newly updated virtual allocation table Vn and the information control blocks VnI of the virtual allocation table are recorded on the storage medium by a data amount corresponding to the number M of recording blocks (process 206).

Then, the flow shifts to decision 205, where it is checked whether or not recording of all information has been completed for the file to be additionally written at that time, and the subsequent processing is executed.

In this case, when an error occurs during writing to the storage medium and the writing is interrupted, the processing as shown in FIG. 9 is executed, and the latest information for which writing has been completed is executed. Restore the storage medium to an accessible state.

First, the last recording block L of the storage medium is searched (process 301), the data of that block is read (process 302), and it is checked whether or not the read data is the address information VnIA (determination 303).

When the result of determination 303 is NO,
The data of the recording block having a block number smaller than the last recording block L and a multiple of N is searched for (step 30).
4) Return to step 302 to read the data of the block.

When the block of the address information VnIA is read and the result of the judgment 303 is YES, the information control block VnI of the corresponding virtual allocation table Vn is read by referring to the address information VnIA, and To find a virtual allocation table Vn to be processed (process 305),
The found virtual allocation table Vn and its information control block VnI are recorded in the area after the last recording block L (process 306).

As a result, the latest virtual allocation table Vn and the contents of the information control block VnI of the information that has been recorded at the time of recording interruption are recorded in the unrecorded area of the storage medium. The recorded information can be reliably restored to the part where the recording has been completed normally.

FIG. 10 shows an outline of a recording process according to still another embodiment of the present invention.

If there is a file to be added (the result of judgment 401 is YES), the file entity is recorded (step 40).
2) The information control block FnI of the file is recorded (process 403), and the directory D updated at that time is recorded.
n (process 404), the information control block DnI of the directory is recorded (process 405), and the virtual allocation table VAT updated at that time is recorded (process 406).
The information control block VnI of the virtual allocation table VAT is recorded (process 407).

Then, the number of blocks recorded in the current recording processing is stored in the memory as the recording amount S (processing 40).
8).

If a recording error occurs during such a recording operation, the processing shown in FIG. 11 is executed to change the contents of the information control block VnI of the latest normally allocated virtual allocation table Vn. read out.

First, the value of the counter C is initialized to 1,
The value of the number of recording blocks (recording amount S) at the time of successful recording is substituted for the constant S, and the value of the block number of the last recording block is substituted for the constant L (process 501).

Next, when the block number is (LS × C +)
, The data of the recording block whose block number is up to (LS × (C−1)) (that is, the data of the recording block whose recording has been completed immediately before) is read (process 502), and the data in the memory from which the data is read is read. The contents are scanned to find the information control block VnI of the virtual allocation table Vn (Process 5).
03).

In this process 503, it is checked whether or not the information control block VnI of the virtual allocation table Vn has been found (determination 5).
04), when the result of the determination 504 is YES, this process is terminated and the process proceeds to the subsequent data recovery process.

When the result of determination 504 is NO, the value of the counter C is increased by one (process 505), and the process returns to process 502 to read data for the next scanning area.

As described above, in this embodiment, when a recording error occurs during the recording operation, the recording data is read out in units of the number of blocks at the time of the normal recording operation, and the contents of the read data are scanned. Since the information control block VnI of the virtual allocation table Vn is found, when restoring the contents of the storage medium in which the recording error has occurred,
The number of times of data access for finding the information control block VnI of the latest virtual allocation table Vn that has been normally recorded can be greatly reduced, and as a result, processing for restoring the contents of the storage medium in which a recording error has occurred can be performed. , Can be performed more quickly. Here, since one image file has almost the same data size, it is possible to reliably find the information control block VnI of the virtual allocation table Vn by reading out the recording data in units of the number of blocks when recording is normally completed. it can.

Incidentally, in the above-described embodiment, the information control block VnI address information VnIA of the virtual allocation table Vn is used.
Is recorded on the storage medium at intervals of a predetermined number of recording blocks, so that influences such as scratches on the surface of the recording medium can be eliminated as much as possible. However, even when a plurality of data itself of the virtual allocation table VAT are recorded, the same applies. The effect of can be obtained. For example, as shown in FIG. 12, by recording the same virtual allocation table two by two consecutively, the reliability of recording data on a storage medium can be greatly improved.

In this case, in the information control block VnI of the virtual allocation table Vn, the address information of the first virtual allocation table Vn is stored, and when the virtual allocation table Vn is actually read, it is stored in the information control block VnI. By reading two blocks of data from the address information
The virtual allocation table Vn can be appropriately acquired.

In the above-described embodiment, the case where the CD-R is used as the storage medium has been described. However, other write-once storage mediums, for example, write-once large-capacity storage media such as CD-RW and DVD-R. The present invention can be similarly applied to an apparatus using as a storage medium.

[0078]

As described above, according to the present invention,
Each time one image file is recorded, the updated directory information and the updated file system information are recorded. Therefore, if one file system information cannot be reproduced, the image information that cannot be reproduced is the latest. In this case, there is an effect that more reliable image recording can be performed.

Further, each time data of a fixed number N of recording blocks is recorded, address information indicating the recording position of the information control block ICB of the virtual allocation table VAT is added and recorded. The number of times of data access for finding the latest information control block VnI of the virtual allocation table Vn from such a storage medium can be greatly reduced. As a result, a process for restoring the contents of the storage medium can be performed.
There is also obtained an effect that execution can be performed quickly.

If a recording error occurs during the recording operation, the recording data is read out in units of the number of blocks at the time of the normal recording operation, the contents of the read data are scanned, and the information control of the virtual allocation table Vn is performed. Since the block VnI is found, when restoring the contents of the storage medium in which the recording error has occurred, the number of data accesses for finding the information control block VnI of the latest virtual allocation table Vn that has been normally recorded is greatly increased. As a result, the effect of being able to more quickly execute the process of restoring the contents of the storage medium in which the recording error has occurred can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an image recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a basic file system of the embodiment.

FIG. 3 is a schematic diagram for explaining file system information corresponding to the file configuration in FIG. 2;

FIG. 4 is a schematic diagram for explaining a virtual assignment table.

FIG. 5 is a schematic diagram showing an example of an information recording mode on a storage medium.

FIG. 6 is a flowchart showing an example of an outline of processing at the time of recording.

FIG. 7 is a schematic view illustrating a mode of data recording on a storage medium according to another embodiment of the present invention.

FIG. 8 is a flowchart showing another example of the outline of the processing at the time of recording.

FIG. 9 is a diagram illustrating processing to be executed when restoring a storage medium to a state where the latest information that has been written can be accessed when some error occurs during writing to the storage medium and the writing is interrupted. 4 is a flowchart showing an outline.

FIG. 10 is a flowchart showing an outline of a recording process according to still another embodiment of the present invention.

FIG. 11 is a flowchart showing an example of a process for reading out the contents of the information control block VnI of the latest virtual allocation table Vn normally recorded when a recording error occurs during the recording operation.

FIG. 12 is a schematic view illustrating a mode of data recording on a storage medium according to still another embodiment of the present invention.

[Explanation of symbols]

 8 Recording / reproducing device 14 Main control unit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H04N 5/781 G11B 27/00 D

Claims (6)

[Claims] 1. A write-once type recording device, comprising: recording a large amount of image information on a storage medium of the write-once type recording device;
An image recording / reproducing apparatus for reproducing image information recorded on a storage medium, wherein, when one image information is recorded on the storage medium, file system information necessary for accessing the image information is also recorded on the storage medium. An image recording / reproducing apparatus comprising a control unit. 2. A write-once recording device, comprising: recording a large amount of image information on a storage medium of the write-once recording device;
In the image recording / reproducing apparatus for reproducing the image information recorded on the storage medium, when one image information is recorded on the storage medium, file system information necessary for accessing the image information is also recorded on the storage medium. An image recording / reproducing apparatus comprising: recording control means for recording the address information of the file system information on the storage medium every time the recording data amount reaches a predetermined data length. 3. A write-once recording device, wherein a large amount of image information is recorded on a storage medium of the write-once recording device,
In the image recording / reproducing apparatus for reproducing the image information recorded on the storage medium, when one image information is recorded on the storage medium, file system information necessary for accessing the image information is also recorded on the storage medium. Recording control means for recording the address information of the file system information on the storage medium every time the recording data amount reaches a predetermined data length; and when reading the information from the storage medium, from the last writing area of the storage medium. Heading toward the head area, the data is read out for each of the predetermined data lengths, the address information of the file system information is searched, and when the address information is found, the file system information is read out by referring to the found address information, A reproduction control unit for reproducing image information based on the file system information; Image recording and reproducing apparatus according to claim and. 4. A write-once recording device, comprising: recording a large amount of image information on a storage medium of the write-once recording device;
In the image recording / reproducing apparatus for reproducing the image information recorded on the storage medium, when one image information is recorded on the storage medium, file system information necessary for accessing the image information is also recorded on the storage medium. Recording control means for recording the address information of the file system information on the storage medium every time the recording data amount reaches a predetermined data length; and when reading the information from the storage medium, from the last writing area of the storage medium. Heading toward the head area, the data is read out for each of the predetermined data lengths, the address information of the file system information is searched, and when the address information is found, the file system information is read by referring to the found address information, and the A reproduction control unit that reproduces image information based on the file system information; When the writing operation of the image information by the recording control unit fails, the reproduction control unit determines the data length read at a time to search for the address information, the write data amount in the failed writing operation, or the previously read data length. An image recording / reproducing apparatus characterized in that the image recording / reproducing apparatus is determined based on the data amount obtained. 5. The file system information is updated each time image information is recorded on the storage medium, and the file system information recorded last on the storage medium is all image information recorded on the storage medium. 5. The image recording / reproducing apparatus according to claim 1, further comprising contents for accessing respective image information. 6. The image recording and reproducing apparatus according to claim 5, wherein said file system information is a virtual allocation table.