JPH0581838A - Magnetic tape recording device - Google Patents

Abstract

PURPOSE:To retrieve control information at a high speed by extracting the information of a subarea from information taken from the magnetic tape at the time of sending at a high speed and providing each means for stopping the high speed sending when an identification code is detected from this extracted data. CONSTITUTION:The magnetic tape is sent at a high speed by a DAT operation control section 14 and information on the magnetic tape at the time of a high speed sending is taken. The identification code is detected by an identification code detecting section 142 further from the information of a subarea extracted by a subarea information extraction section 141 from this information. This identification code is used for identifying the recorded main area of the control information and when this is detected, the high speed sending of the magnetic tape is stopped by the control section 14. Thus, the recorded position of the control information recorded on an optional position on the magnetic tape is retrieved at a high speed without providing a controlling means and a program searching is operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic tape recording device equipped with an electronic filing device for storing image data and the like, and is particularly suitable for reading out management information recorded on the magnetic tape and loading it into the main body of the device. The present invention relates to a magnetic tape recording device.

[0002]

2. Description of the Related Art In recent years, in electronic filing apparatuses such as computers, those using magnetic disks such as fixed disks and floppy disks, and magnetic tapes have become widespread. In particular, magnetic tapes are often used as exchangeable and large-capacity recording media. Recently, as a magnetic tape,
Digital audio tapes with standardized standards are being used.

When data is recorded on a magnetic tape and an electronic filing apparatus is constructed, it is necessary to record the recording position of each file on the magnetic tape and management information containing attribute data and the like on the magnetic tape. When using the device, the management information is first read by the device and the file is read or updated while referring to the read management information.

In this type of device, conventionally, there is known a device in which management information is recorded at a predetermined position on the magnetic tape at a beginning portion and an intermediate portion.

In this magnetic tape recording apparatus in which the management information is recorded at specific positions of the beginning portion and the intermediate portion of the magnetic tape, for example, it becomes impossible to read the management information at the beginning portion, and the predetermined specific information is recorded. When it becomes necessary to use the management information recorded at the position, the magnetic tape is made to run at high speed to the specific position according to the position management information.

[0006]

As described above, since the above-mentioned conventional magnetic tape recording apparatus is fixed at the two positions specified as the recording position of the management information, this specific position is set at the time of high speed running and data recording. A separate means to constantly manage was required.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a magnetic tape recording apparatus which enables high-speed retrieval of a recording position of management information recorded at an arbitrary position on a magnetic tape. To do.

[0008]

In order to achieve the above object, the present invention provides a main area in which management information regarding recorded data is recorded, and an identification for identifying the main area corresponding to the main area. A magnetic tape recording device for reading the management information from a magnetic tape having a sub area for recording a code and having the management information and the identification code recorded at least at a portion other than the beginning portion, the magnetic tape comprising: Drive means for high-speed feeding, extraction means for extracting information on the magnetic tape during high-speed feeding, extraction means for extracting information of the sub-area from the extracted information, and extraction data of the extracted sub-area A detection means for detecting the identification code; and a drive stopping means for stopping the high speed feeding of the magnetic tape when the identification code is detected. It is formed (claim 1).

Further, according to the present invention, management information about data to be recorded is recorded and the management position is recorded from a magnetic tape in which a recording position of the management information is recorded in a preset recording area on the magnetic tape. A magnetic tape recording device for reading information, comprising position reading means for reading the recording position of the management information, tape driving means for feeding the magnetic tape at high speed, and high speed feeding of the magnetic tape to the recording position of the read management information. And a drive stopping means for stopping the high-speed feeding of the magnetic tape at times (claim 2).

[0010]

According to the present invention, a magnetic tape having a main area in which management information regarding recorded data is recorded and a sub area in which an identification code for identifying the main area is recorded corresponding to the main area. When the tape is driven at high speed by the tape drive means, the information on the magnetic tape is taken out by the take-out means, the sub-area data is extracted from the taken-out information by the extraction means, and the detection means is used from the extracted sub-area data. The identification code is detected. Data cannot be read during high-speed feeding of the magnetic tape, but simple codes such as identification codes can be discriminated and extracted.
Therefore, when this identification code is detected, the drive stopping means stops the high-speed feeding of the magnetic tape. After this, the management information is read by normal feeding.

Further, when the recording position of the management information is read by the position reading means, the magnetic tape is fed at a high speed by the tape driving means, and when the recording tape of the read management information is fed, the drive stopping means is operated. The high speed feeding of the magnetic tape is stopped. After this, the management information is read by normal feeding.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the entire magnetic tape recording apparatus 1. The magnetic tape recorder 1 includes a data controller 2 including the functions of a digital plain paper copier (DPPC).
And a digital audio tape recorder (DAT) 3.

The data control section 2 is mainly composed of an image processing control section 4, an operation control section 5, a scanner 6 for reading an original or the like, a printer 9 for copying image data or the like, a facsimile (FA).
X) 10 and page memory 11 and the like.
Further, the scanner 6, the printer 9 and the image processing control unit 4 are provided with video interfaces (VD.IF) 61 and 91, respectively.
The data control unit 2 and DAT 3 are connected by a digital audio interface (DAI) 12, and the page memories 11 and DAI 12 are connected by a video interface (VD.I).
F) 111 is connected.

The image processing control unit 4 is composed of a microcomputer, and internally has a bit map memory 41, a binarization processing unit 42 and an image compression / expansion processing unit (VCEP unit).
Has 43. The bitmap memory 41 is for temporarily storing the captured data from the scanner 6 and the FAX 10 or the image data from the page memory 11 as bit information. The binarization processing unit 42 binarizes the data in the bitmap memory 41. VCEP
The unit 43 compresses the data in the bit map memory 41 and outputs it to the page memory 11 or the like, or decompresses the data from the page memory 11 and outputs it to the bit map memory 4.
It is output to 1. If necessary, VCEP
The data of the scanner 6, the FAX 10 and the page memory 11 can be directly guided to a required circuit section without the section 43.

Then, the image processing control section 4 responds to the operation of a mode switching key of the operation section 17 which will be described later, and the like.
The end of data (EOD) signal indicating the end of the data is added to the end of the image data read by the or the image data received by the FAX 10, and the image data is output to the DAT 3 via the page memory 11 or the like. , Is designed to record on magnetic tape.

The image processing control section 4 can output image data from the scanner 6, image data from the FAX 10 or the like or image data from the DAT 3 to the printer 9. Further, the image processing controller 4 can output the image data read by the scanner 6 and the image data from the DAT 3 to the FAX 10.

The page memory 11 stores the image data from the image processing controller 4 or the DAT 3 page by page.

The operation control section 5 is composed of a microcomputer and controls the operation of each section of the magnetic tape recording apparatus 1 in accordance with the operation of the operation section 17. Also,
The operation control unit 5 uses a TOC (table, table, etc.) that indicates the registration date, title, and other attributes of data recorded on the magnetic tape.
Random access memory (RAM) 7 for storing data of content and TOC for managing the TOC data
The management unit 8 is provided, and the TOC data recorded on the magnetic tape is also managed. Further, the TOC management unit includes a timer 81 for managing the TOC data.

That is, when the magnetic tape is set, the TOC management unit 8 reads the TOC data from the magnetic tape and stores the TOC data in the RAM 7, and also records the image data on the magnetic tape by the operation unit 17, for example. TO in the RAM 7 according to a processing command such as erase or erase
Update C data.

Further, the operation control unit 5 is adapted to record the TOC data stored in the RAM 7 on the magnetic tape, for example, at regular time intervals when the use of the magnetic tape is completed or the time is controlled by a timer.

In the management of the TOC data, T
The image data deleted on the OC data is updated and deleted when the next image data is recorded on the magnetic tape.

The operation unit 17 includes a key for inputting TOC data for managing data recorded on the magnetic tape, a file mode for recording image data read by the scanner 6 on the magnetic tape, and data received by the FAX 10. A mode switching key for switching the FAX mode to be recorded on the magnetic tape, a key for setting the image density at the time of reading an original by the scanner 6, a required number of sheets for printing, and other keys for searching data recorded on the magnetic tape, etc. And a display circuit 171 for confirming the operation content.

Further, the operation control section 5 performs the search process based on the search instruction from the operation section 17 so as to perform the search process.
The TOC data in the RAM 7 is referred to via the C management unit 8 and the display circuit 171 in the operation unit 17 is caused to display a file name for retrieval or the like.

The DAT 3 is composed of a DAT operation control unit 14, a head control unit 15 and the like. The head controller 15 and the data controller 2 are connected by a digital audio interface (DAI) 13.

The DAT operation control section 14 controls the operation of each section of the DAT 3, and receives a control command from the operation control section 5 to instruct the head control section 15 to perform recording, reproduction, erasing, etc. At the same time, an instruction to run or stop the magnetic tape is given. The head controller 15
A magnetic head, a reel motor, and the like (not shown) are driven and controlled, and a random access memory / error correction code unit (RAM / ECC) 151 is provided therein. The RAM / ECC 151 adds an error correction code to the input data from the data control unit 2 at the time of recording and applies error correction to the data from the magnetic tape based on the error correction code at the time of reproduction.

Next, the contents recorded on the magnetic tape will be described with reference to FIG. FIG. 3 is a schematic diagram schematically showing the contents recorded on the magnetic tape. Magnetic tape 2
1, the lead-in area C, the TOC area D, the data area group E, and the section identification area F added to the head of each data area E0 in the data area group E are formed. The data area E0 is formed to have a constant or arbitrary recording area unit length.

Next, the track format of the magnetic tape will be described with reference to FIG. The magnetic tape is formatted so that various data are recorded on a large number of tracks T arranged and formed with a predetermined angle of inclination with respect to the running direction X. The format of each track T is shown in Table 1, EIAJ CP-2.
It is formed according to the standard of 305.

[0028]

[Table 1]

Each track T has a sub-region A formed at both ends thereof and a main region B formed at the center thereof.
Program number data (P. No) indicating the recording order of data, index data (Index) for area identification, etc. are recorded in the sub area A, and image data etc. are recorded in the main area B. It is designed to be.

The lead-in area C is provided to prevent the effect of rising of the head or the like and to discriminate the type of tape. In the sub-area A of each track T of the lead-in area C, as shown in FIG. 5, program number data “0BB” and index data “0
0 "is recorded in multiplex.

The TOC area D is, as shown in Table 2, tape attribute data such as tape name, management data such as unused pages and erased pages, file attribute data such as registration date and time, registrant name, title and password. Also, tape operation history data and the like are recorded.

[0032]

[Table 2]

In the sub-area A of each track T of the TOC area D, program number data "000" is multiplexedly recorded as shown in FIG. 5, and tracks T from the head to a predetermined number are recorded. Index data “AA” is recorded in the sub-area A, and index data “01” is recorded in the following track T in a multiplexed manner.

Further, in the TOC area D, management data of data of a data area group E, which will be described later, file attribute data and the like are recorded. That is, TO
As shown in Table 3, in the C area D, the program number data (P. No) and the file number data (FILEN) are associated with each data area E0 of the data area group E described later.
o), page number data of each file (PAGE N
o), an unused flag indicating whether the page is an unused page, an erased flag indicating whether the page is an erased page, an unusable flag indicating whether the page has become unusable due to deterioration or the like, and image size data indicating the size of the document. Etc. are recorded. It should be noted that "1" is set to the unused flag and the erased flag of the program numbers corresponding to the unused page and the erased page.

[0035]

[Table 3]

The data area group E has a plurality of data areas E0 for recording image data from the scanner 6 and received data from the FAX 10. In the sub-area A of the track T of the data area group E, as shown in FIG. 6, "001" is set for each data area E0 along the tape recording direction.
Program number data of "002", ... "N", "n + 1" ,. The data area E0 is for recording image data and the like, for example, in A3 size page units.

The section identification area F is an area in which a section identifier indicating the head of the data area is recorded, and this section identifier is used for finding the beginning of data retrieval. In the sub area A of the track T of the section identification area F, program number data having the same number data as the program number data of the data area group E is written. Further, from the tip of the section identification area F to the sub-areas A of the predetermined number of tracks T,
As shown in FIG. 5, index data “00” is recorded, and index data “AA” is recorded in the sub-area A of the track T following it.

FIG. 2 shows a TOC area high-speed search and TOC.
It is a block diagram which shows the schematic structure which re-records data. The magnetic head 152 reads information on the magnetic tape and records the information on the magnetic tape. The magnetic head 152 is designed to be operated by an instruction from the head controller 15. The sub-area information extraction unit 141 extracts information on the sub-area from the information on the magnetic tape read by the magnetic head 152 during high-speed feeding of the magnetic tape, and the extracted data is transferred to the identification code detection unit 142. The identification code 102 described later is detected.

Further, the reading discriminating unit 143 determines the TOC from the information on the magnetic tape read by the magnetic head 152.
It is determined whether or not the data can be read, and the determination result is transferred to the TOC management unit 8. The TOC management unit 8 uses the reading determination unit 143 to determine the TOC.
When data cannot be read, TOC is required to re-record.
The unused page on the magnetic tape is detected from the management data in the data (see Table 2).

Next, an example of searching the TOC area and re-recording the TOC data will be described with reference to FIGS.
FIG. 7 is a schematic diagram schematically showing the TOC area of the magnetic tape. In the TOC area D (FIG. 3) of the magnetic tape 21, the TOC data 101 is stored in the main area B (FIG. 4).
However, in the sub-area A (FIG. 4), unique index data for identifying the TOC area or the identification code 102 that is a unique or simple code is recorded.

FIG. 8 is a flow chart showing the retrieval operation of the TOC area D, and FIG. 9 is a flow chart showing the re-recording operation of the TOC data performed when the magnetic tape is taken out, for example. Note that the magnetic head 152 starts from the TOC area recorded at the beginning of the magnetic tape to the TOC.
Although the data is read out, when the TOC data recorded at the beginning is unreadable, the TOC area can be searched at high speed by detecting the identification code of the sub-area A.

Next, the search operation of the TOC area D will be described with reference to FIG. When the TOC data at the beginning is unreadable, the process moves to the flowchart of FIG.
The AT operation control unit 14 starts high-speed search for the next TOC area on the magnetic tape (step S1). Next, it is determined whether the identification code detection unit 142 has detected the TOC identification code of the sub area A (step S2). If the TOC identification code is detected (Y in step S2)
ES), stop the high-speed running of the magnetic tape (step S
3) Then, the mode is switched to normal running to start reading the recorded contents (step S4). Then, the read determination unit 143
It is determined whether the TOC data can be normally read by, and if the TOC data can be read (YES in step S5), the operation control unit 5 stores the subsequent predetermined length data in the page memory 11,
The TOC data is stored in the RAM 7 via the image processing control unit 4 (step S6).

If the TOC data cannot be read normally in step S5 (NO in step S5), the head controller 15 rewrites the TOC identification code to another code indicating that the TOC identification code cannot be read (indicates that the TOC area is not in the TOC area). In step S7), the TOC defect counter is incremented (step S8), the process returns to step S1, and subsequently the high speed search of the TOC area is restarted.

That is, by detecting the TOC identification code, the TOC area can be searched at high speed. Also,
When the TOC data cannot be read, the TOC identification code is rewritten to pass through the area at the time of search, and the number of TOC areas that cannot be read by the TOC defect counter is stored.

Next, the rerecording operation of TOC data, which is performed when the magnetic tape is taken out, will be described with reference to the flowchart of FIG. First, it is determined whether the TOC defect counter is 0, and if it is 0 (step S
If YES in 11), the first TOC area is cued based on the program number stored in the RAM 7 (step S12), and the TOC data is updated and recorded (step S13). Next, a high speed search for the second TOC area is performed (step S14). The steps S14 to S16 are the same as the steps S1 to S3 in FIG. Then, the TOC data is updated and recorded (step S17). And all TO
It is determined whether or not the update recording has been completed for the C data, and if it has not been completed (NO in step S18), the process returns to step S14, and the above operation is repeated until it is completed.

Next, at step S11, if the TOC defect counter is not 0 (NO at step S11),
In step S19, the first TOC area is located based on the program number stored in the RAM 7.
The steps S19 to S24 are the same as the step S1.
The description is omitted because it is the same as the steps 2 to S17. Then, it is determined whether or not the normal update recording of the TOC data is completed, and if it is not completed (N in step S25,
O), the process returns to step S21, and the above-described operation is repeated until the end. When the normal update recording of the TOC data is completed (YES in step S25), the TOC management unit 8 then searches the empty area on the magnetic tape (step S26), and newly records the TOC data and the TOC identification code. (Step S27). Then, it is determined whether or not the recording of the TOC defect counter number is completed, and if it is not completed (NO in step S28), the process returns to step S26 to repeat the above operation, and if completed (step S2).
If YES in step 8), the TOC defect counter is reset to 0 (step S29). And after this, the magnetic tape is D
It can be taken out from AT3.

That is, by newly recording the TOC data in the empty area on the magnetic tape by the number of the TOC defect counters, the required number of normal TOC data is always held, so that the reading of the TOC data is ensured. It

Next, a second embodiment of searching the TOC area and rerecording the TOC data will be described with reference to FIGS. 10 to 12 are schematic diagrams schematically showing the TOC data recorded on the magnetic tape and the address indicating the recording position. When the magnetic tape is started to be used, as shown in FIG. 10, the TOC data is recorded at the beginning portion of the magnetic tape 21, the address m and the address m + 1, and the address data m is the TO.
It is recorded in a region following the C data together with a pattern (indicated as "good" in the figure) indicating that the address data is valid. In this case, the TOC data recorded in the TOC area at the beginning is used.

When the TOC data at the beginning cannot be read, as shown in FIG. 11, a pattern indicating that the TOC data at the beginning is invalid (in the figure,
(Indicated by "old") is recorded, and the TOC data recorded at the address m is used.

Furthermore, when the TOC data recorded at the address m becomes unreadable, the TOC at the address m + 1 is read.
As shown in FIG. 12, data is newly recorded at two locations, address n and address n + 1, and the address data is recorded in a region following the TOC data at the beginning with a pattern indicating that the address data is valid. To do. Further, the pattern indicating the address data of the address m is erased (indicated by "old" in the figure).

If the recording area length of TOC data is set equal to the recording area length of data as shown in FIG.
The areas of address m and address m + 1 that are no longer used as recording areas for OC data can also be used as recording areas for image data and the like.

Next, the TOC area search operation will be described with reference to the flowchart of FIG. The DAT operation control unit 14 starts reading the recorded contents from the leading end of the magnetic tape (step S31). Next, the identification code detection unit 142 determines whether the pattern of the identification code is a pattern indicating the TOC area, and if the pattern indicates the TOC area (YES in step S32), the read determination unit 143 determines that the TOC data is normal. It is determined whether the data can be read (step S33). If the TOC data can be read normally (YES in step S33), the operation controller 5 causes the page memory 11 to store subsequent predetermined length data.
The RAM 7 is stored as TOC data via the image processing control unit 4 (step S34).

If the TOC data cannot be read normally in step S33 (NO in step S33), the magnetic tape is rewound to the head position of the TOC area, and the head controller 15 indicates that the magnetic tape is not in the TOC area.
The OC identification code is rewritten (step S35), the process returns to step S32, and the reading of the recorded contents is continued.

In step S32, if the pattern of the identification code at the beginning is not a pattern indicating the TOC area (NO in step S32), it is determined whether the pattern of the identification code indicates the area of address data, and the address data is determined. If the pattern does not indicate the area (NO in step S36), the process returns to step S32 to continue reading the recorded content.

In step S36, if the pattern of the identification code is the pattern indicating the area of the address data (YES in step S36), the address data is read (step S37), and the position of the read address m is found. Therefore, the magnetic tape is run at high speed (step S38). Then, after the mode is switched to the normal feed, the read determination unit 143 determines whether the TOC data can be normally read (step S39). T
If the OC data can be read normally (Y in step S39)
ES), and proceeds to step S34 to store the subsequent predetermined length data as TOC data.

In step S39, T of address m
If the OC data cannot be read normally (step S39)
No.), the next, that is, the predetermined length data at the address m + 1 is read via the page memory 11 and the image processing controller 4
The TOC data is stored in AM7 (step S4
0), a TOC change flag indicating that it is necessary to newly record TOC data in the empty area of the magnetic tape is set (step S41).

That is, when the TOC data recorded at the beginning of the magnetic tape cannot be read, the TO at address m
Although C data is used, since the address of the recording position is recorded at the beginning of the magnetic tape, the TOC area can be searched at high speed. Further, when the TOC data of the address m cannot be read, the TOC data of the address m + 1 is used.

Next, the rerecording operation of the TOC data, which is performed when the magnetic tape is taken out, will be described with reference to FIG.
This will be described with reference to the flowchart of. First, it is determined whether TOC data has been read from the TOC area at the beginning of the magnetic tape, and if so (Y in step S51).
ES), the beginning of the TOC area at the beginning is searched (step S52), and the TOC data is updated and recorded (step S53). Next, the address m is read from the address data area (step S54), the address m is searched for at high speed (step S55), the normal feed is switched, and the TOC data is updated and recorded (step S56). Subsequently, the address m + 1 is searched for (step S57), and the TOC data is updated and recorded (step S58).

On the other hand, if the TOC data is not read from the TOC area at the beginning of the magnetic tape in step S51 (NO in step S51), it is determined whether the TOC change flag is set or not, and if it is not set. (NO in step S59), step S5
Go to 4. If the TOC change flag is set in step S59 (YES in step S59), the tape is sent to read the recorded contents (step S60),
It is determined whether or not the pattern of the identification code indicates the area of the address data (step S61). Then, if the pattern indicating the area of the address data is obtained (YES in step S61), it is determined whether or not the change of the address data is completed. If it is not completed (NO in step S62), the first address, That is, it is determined whether or not the address m is a stored area, and if it is the first area (YES in step S63), the identification code is rewritten so that the address m cannot be read (step S64), and the process returns to step S60. If the address is not the first address in step S63, that is, if it is the write area for the next address data (NO in step S63), n is written as address data (step S65), and the process returns to step S60. Then, since the change of the address data is completed in step S62 (step S6
2), the address n is searched for (step S66), and the TOC data is newly recorded (step S66).
67). Subsequently, the address n + 1 is searched for (step S68), and the TOC data is newly recorded again (step S69).

That is, at first, the TOC data recorded at the beginning of the magnetic tape is used. On the other hand, when the TOC data at the beginning becomes unreadable, the TOC data recorded at the address m is used. , When the TOC data recorded at the address m becomes unreadable, the TOC data is newly recorded at two positions, the address n and the address n + 1 in the empty area. After that, by repeating the new recording sequentially every time the TOC data becomes unreadable, a fixed number (two in this embodiment) of TOC data can be held at all times, and the reading of the TOC data can be ensured. I am trying.

In this embodiment, two TOC data are always provided, but the present invention is not limited to this, and more TOC data can be provided. In addition, for example, when four pieces of TOC data are held, if two pieces cannot be read, two new recordings may be performed. This can reduce the number of new recording operations.

[0062]

As described above, according to the present invention, the tape drive means for feeding the magnetic tape at a high speed, the take-out means for taking out the information on the magnetic tape at the time of the high-speed feed, and the information of the sub area from the taken out information. Since extraction means, detection means for detecting the identification code from the extracted data of the extracted sub-region, and drive stop means for stopping the high-speed feeding of the magnetic tape when the identification code is detected, The recording position of the management information can be searched and searched at high speed without providing any means for managing the recording position of the management information.

Further, when the position reading means for reading the recording position of the management information regarding the data to be recorded, the tape driving means for feeding the magnetic tape at high speed, and the high speed feeding of the magnetic tape to the recording position of the read management information are performed. Since the driving stop means for stopping the high-speed feeding of the magnetic tape is provided, the recording position of the management information can be searched at high speed only from the recording position information on the magnetic tape to find the head.

[Brief description of drawings]

FIG. 1 is a block diagram showing an entire magnetic tape recording device.

FIG. 2 is a block diagram showing a schematic configuration for performing high-speed search of a TOC area and re-recording TOC data.

FIG. 3 is a schematic diagram schematically showing the contents recorded on a magnetic tape.

FIG. 4 is a diagram showing a track format of a magnetic tape.

FIG. 5 is a diagram showing the contents recorded at the beginning of the magnetic tape.

FIG. 6 is a diagram showing contents recorded in a data area and a section identification area of a magnetic tape.

FIG. 7 is a schematic view schematically showing a TOC area of a magnetic tape.

FIG. 8 is a flowchart showing a TOC area search operation in the first embodiment.

FIG. 9 is a flowchart showing a rerecording operation of TOC data in the first embodiment.

FIG. 10 is a schematic diagram schematically showing TOC data recorded on a magnetic tape and an address indicating a recording position thereof in the second embodiment.

FIG. 11 is a schematic diagram schematically showing TOC data recorded on a magnetic tape and an address indicating a recording position thereof in the second embodiment.

FIG. 12 is a schematic diagram schematically showing TOC data recorded on a magnetic tape and an address indicating a recording position thereof in the second embodiment.

FIG. 13 is a flowchart showing a TOC area search operation in the second embodiment.

FIG. 14 is a flowchart showing a rerecording operation of TOC data in the second embodiment.

[Explanation of symbols]

1 Magnetic Tape Recording Device 2 Data Control Section 3 Digital Audio Tape Recorder (DAT) 4 Image Processing Control Section 5 Operation Control Section 6 Scanner 7 Random Access Memory (RAM) 8 TOC Management Section 9 Printer 10 Facsimile (FAX) 11 Page Memory 12 , 13 Digital audio interface (D
AI) 14 DAT operation control unit 15 head control unit 17 operation unit 21 magnetic tape 41 bitmap memory 42 binarization processing unit 43 image compression / expansion processing unit (VCEP unit) 61, 91, 111 video interface (VD.I)
F) 81 timer 101 TOC data 102 identification code 141 sub-area information extraction section 142 identification code detection section 143 read determination section 151 random access memory / error correction code section 152 magnetic head 171 display circuit

Claims (2)

[Claims] 1. A main area in which management information about recorded data is recorded, and a sub area in which an identification code for identifying the main area is recorded corresponding to the main area, and at least other than the beginning portion. Is a magnetic tape recording device for reading the management information from a magnetic tape having the management information and the identification code recorded on the magnetic tape, the tape drive means for feeding the magnetic tape at a high speed, and the magnetic tape on the magnetic tape during the high speed feeding. Extracting means for extracting the information, extracting means for extracting the information of the sub area from the extracted information, detecting means for detecting the identification code from the extracted data of the extracted sub area, and the identification code being detected. And a drive stopping means for stopping the high-speed feeding of the magnetic tape when the magnetic tape recording apparatus is turned on. 2. A magnetic tape for reading management information from a magnetic tape in which management information relating to data to be recorded is recorded and a recording position of the management information is recorded in a preset recording area on the magnetic tape. A tape recording apparatus, comprising: position reading means for reading the recording position of the management information; tape driving means for feeding the magnetic tape at high speed; and magnetic tape when the magnetic tape is fed at high speed to the recording position of the read management information. And a drive stopping means for stopping the high-speed feeding of the magnetic tape recording apparatus.