JPH117752A - Recording apparatus and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent missing of directory data by repeatedly recording the directory data to a tape-shaped recording medium, and primarily using the directory data recorded last. SOLUTION: A DAT tape 1 is separated to a directory area 2 and a data record area 3. Directory data D1-D5 are recorded to the directory area 2. Directory data D3-D5 are mainly used at the reproduction time. In the case where the third directory data D3 are not normally finished to be read, the fourth directory data D4 are read out and used. Further, if the D4 cannot be normally finished to be read, the fifth D5 are read and used. Accordingly, even if a front part of the directory data are lost because of stains of magnetic particles wiped and accumulated in the vicinity of a leading end part of the magnetic tape by a magnetic head when the magnetic tape is wound, the directory data are prevented from being unable to be reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for recording digital data on a tape-shaped recording medium.

[0002]

2. Description of the Related Art In a conventional recording apparatus, as shown in FIG.
After data is recorded in the data recording area 3 of the second recording section of the DAT tape 1, the DAT tape 1 is rewound so that the recording head comes to the head position of the directory area 2 of the first recording section, and data recording is performed. Data 4 recorded in area 3
The information required for search and editing, such as data address indicating the recording position, time code, title information such as music title, etc., is recorded last as directory data.

Each time data is recorded in the data recording area 3, the DAT tape 1 is rewound to the head position of the directory area, and the directory data is overwritten. Therefore, when the data recording operation is released, the recording head contacts the DAT tape between the data recording area 3 and the directory area 2 of the DAT tape 1 and repeats the reciprocating movement of the constant speed recording or the high speed rewind.

Dirt (magnetic powder, etc.), which has been electrostatically attached to the surface of the DAT tape 1, is swept from the data recording area 3 where the recording operation was performed to the directory data recording head position of the directory area 2 where directory data is recorded. The dirt due to the dust and tobacco fat is
As the number of recordings overlaps near the position of the magnetic tape where the transport of the tape has been reversed with respect to the surface of the magnetic head, the tape is left behind and concentrated on the head, which is the first section for recording directory data, and the tape is entangled. The recording and reproduction performance of the first recording section in which the directory data is recorded is deteriorated, and the life of the recording medium is shortened.

[0005]

The data is recorded on a magnetic tape, such as a DAT tape, and is rewound from the position where the recording operation has been completed, and the magnetic data reaches the beginning of the first recording section of the directory data recording area for recording directory data. Each time directory data is recorded, dirt such as magnetic powder on the DAT tape swept by the head accumulates near the beginning of the directory data recording section, making it impossible to correctly record and reproduce the directory data. Was.

According to the present invention, the recording of directory data in such a directory area is recorded a plurality of times together with head cleaning, and the first recorded directory data is not used among the plurality of recorded directory data. The data recorded in the data recording area is reproduced mainly using the directory data recorded in the data recording area.

[0007]

According to the present invention, there is provided an apparatus for recording digital data on a tape-like recording medium, comprising: a first recording section and a second recording section provided on the recording medium; Data recording means for recording the digital data in a recording section; driving means for driving the recording medium to move a recording position to the second recording section and the first recording section; A recording apparatus comprising a recording unit that repeatedly records directory data of the recorded digital data in the first recording section a plurality of times.

The present invention also relates to an apparatus for recording digital data on a tape-shaped recording medium, wherein the digital data is recorded in a second recording section of a first recording section and a second recording section provided on the recording medium. Data recording means for recording data; driving means for driving the recording medium to move a recording position to the second recording section and the first recording section; and the digital recording section for recording data in the second recording section. Recording means for repeatedly recording directory data of data in the first recording section a plurality of times; reading means for reading the directory data recorded in the first recording section of the recording medium; Reproduction of reproducing the data recorded in the second recording section based on the directory data read last among the directory data of A recording apparatus having a stage.

The present invention also relates to an apparatus for recording digital data on a tape-shaped recording medium, wherein the digital data is recorded in a second recording section of a first recording section and a second recording section provided on the recording medium. Data recording means for recording data; driving means for driving the recording medium to move a recording position to the second recording section and the first recording section; and the digital recording section for recording data in the second recording section. Recording means for repeatedly recording the directory data of data in the first recording section a plurality of times; and reading the directory data recorded in the first recording section of the recording medium a plurality of times excluding both ends of the directory data excluding both ends. Reading means, and the second storage means based on directory data recorded later among the plurality of directory data read by the reading means. A recording apparatus comprising a reproducing means for reproducing the data recorded in the section.

The present invention also provides an apparatus for recording digital data on a tape-shaped recording medium, wherein the first recording section and the second recording section provided on the recording medium have the second recording section. Data recording means for recording digital data; driving means for driving the recording medium to move a recording position to the second recording section and the first recording section; and Recording means for repeatedly recording directory data of digital data in the first recording section a plurality of times; and directory data in the directory data recorded a plurality of times in the first recording section of the recording medium, excluding both ends of the directory data. Reading means for reading, and reading out of the plurality of directory data sequentially read out by the reading means up to the last recorded directory data Means for returning to the head of the directory data when it is not possible to read the directory data repeatedly, and among the directory data obtained by repeated reading, the data recorded in the second recording section based on the directory data recorded later. This is a recording device including a reproducing unit for reproducing.

The present invention also provides a tape-shaped recording medium on which digital data is recorded, wherein the recording medium has a first recording section and a second recording section in a direction in which the recording medium is conveyed. Is a recording medium in which the digital data is recorded in a recording section, and directory data of the digital data is recorded a plurality of times in the first recording section.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the recording apparatus and recording medium of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of the recording apparatus of the present embodiment. FIG. 2 shows DA as a recording medium of this embodiment.
FIG. 2 is a diagram showing a positional relationship of data recorded on a T tape 1. FIG. 3 is a flowchart for explaining the recording operation of this embodiment, and FIG. 4 is a flowchart for explaining the reproducing operation. The recording apparatus of this embodiment uses a DAT drive 17 loaded with a DAT tape 1 having a large storage capacity.

An analog audio signal of a plurality of channels (for example, 8 channels) inputted from a plurality of input terminals 11 (1 to 8 channels) is converted into digital data by an AD converter 12, and the digital data of each channel is converted. Is stored in a recording memory 13 for each channel, and the stored data is controlled by a microcomputer 14 and recorded as block data on a DAT tape 1 as a recording medium.

At the time of recording, the microcomputer 14 records recording time data and block data to be recorded in a buffer memory 15 for storing digital data transferred in a time axis from the recording memory 13 at regular intervals and a directory RAM 16 for storing directory data. Supply recording channel data to be added to distinguish the
The recording data is sent to T17, and the data is recorded on the DAT tape 1.

At the time of reproduction, the DA loaded in the DAT 17
The digital data read from the T tape 1 is stored in the buffer memory 15, and directory data including time information and channel information of the data is stored in the directory RAM 16. The data stored in the buffer memory 15 is controlled by the microcomputer 14 and is stored in the reproduction memory 18 of eight channels as continuous digital data which is expanded in time axis and stored for each channel, and the stored data is sequentially subjected to DA conversion. The digital data is converted to analog data through the device 19 and output from the output terminal 20 to 8.
It is output as a channel analog audio signal.

The display 22 displays the current time at the time of stopping or recording, and displays the time at which the audio signal or the like currently being reproduced is recorded at the time of reproduction.

Next, the positional relationship of the recording data shown in FIG. 2 will be described. The DAT tape 1 is divided into a directory area 2 and a data recording area 3.
Is composed of a plurality of data blocks in units of blocks (not shown). Access to the DAT tape 1 during recording and reproduction is performed in block units. At the beginning of each block, time data corresponding to the time data recorded in the directory area 2 is recorded, and time-axis-compressed data is attached.

The physical positional relationship of the DAT tape 1 is D
BOT (Beginning of Ta) from the start end 1a side of the AT tape 1 toward the end direction as shown by arrow A.
pe), a directory area 2 of a first recording section for recording directory data such as table of contents information, and a data recording area 3 of a second recording section for recording data such as music and image information.

At the time of recording, input data of a plurality of channels are sequentially recorded as block data in the data recording area 3 of the second recording section. When the data recording to the data recording area 3 is completed, the DAT tape 1
The information necessary for searching and editing such as a data address indicating the recording position of the data 4 recorded in the data recording area 3, a time code, a title of the music, and the like is finally returned as directory data. Be recorded.
Each time data is recorded in the data recording area 3, the DAT tape 1 is rewound to the directory area 2 and the directory data is overwritten and recorded.

The recording apparatus of the present embodiment has a data recording area 3
Each time the recording of the data 4 is completed, the directory data is recorded in the directory area 2 a plurality of times (D1 to D5). At the time of reproduction, the contents information of the directory data recorded in the directory area 2 is searched, and the data recording area 3 is searched.
The target data is searched for and reproduced from the address and the time code of the data 4 recorded in the.

The recording apparatus of this embodiment records the same directory data in the directory area 2 repeatedly five times.
The directory data in which the head position data of the block data of each channel recorded in the data recording area 3 is recorded backward even if the data recorded at the head of the directory area 2 may be missing due to dust or dirt. Data loss in directory data to be recorded, for example, D3 to D5 is far less. In addition, it is possible to prevent the head covered with dust and dust from scratching the recording portion and shortening the recording / reproducing life of the tape.

The DAT tape 1 is rewound from the recording position of the data recording area 3 where the recording operation was performed to the head of the directory recording position of the directory area 2. The dirt accumulated and adhered to the unwound portion of the DAT tape 1 is swept and collected by a magnetic head, and the DAT tape 1
Is accumulated repeatedly especially at the head of the directory data recording position, and is accumulated at each recording operation.

In this embodiment, the same directory data is stored in 5
Record each. During a normal recording operation, all five directory data are sequentially updated from the first directory data. If the recording of the first directory is not completed normally, the second and subsequent directory data are updated. Further, if the recording operation of the second directory data does not end normally, the third and subsequent directory data are updated.

In this embodiment, even if the recording operation of the second and subsequent directory data is not completed normally, if the recording operation of the third and subsequent directory data is performed normally,
The recorded directory data is read out, and the microcomputer 1
4, the data recorded in the data recording area 3 can be searched and reproduced based on the stored directory data.

In the present embodiment, the third directory data is skipped as the third and subsequent directory data as directory data with little data loss and high reliability. Is read first, and the third to fifth directory data are mainly used. If the operation of reading the third directory data does not end normally, the fourth directory data is read and used. Further, when the operation of reading the fourth directory data does not end normally, the fifth directory data is read and used.

FIG. 3 is a flowchart showing the operation of recording directory data according to the present embodiment. Audio signals of a plurality of channels (for example, eight channels) of telephones and the like input to the plurality of input terminals 11 of the recording apparatus of the present embodiment are AD
The signal is converted into a digital signal by the converter 12 and recorded in the recording memory 13 for each channel. The microcomputer 14
Time axis compression processing is performed, and the data is transferred from the recording memory 13 to the buffer memory 15 as block data for each channel and stored therein, and directory data of each block data is stored in the directory RAM 16. The microcomputer 14 stores the DAT 17 from the directory RAM 16 and the buffer memory 15.
Data is sequentially recorded as a block in the data recording area 3 of the DAT tape 1 loaded into the DAT tape 1 with the lapse of time (S
1).

When the recording of the data in the data recording area is completed, a cancel operation input of the recording operation is input by the operation switch 21. When the recording operation is stopped and the recording of the data is released, the microcomputer 14 operates the tape drive motor of the DAT 17 to rewind the DAT tape 1 and moves to the head position of the directory area 2 for recording the first directory data. The directory data in the directory RAM 16 in which the magnetic head is located so as to come and the directory data related to the data 4 recorded in the data recording area 3 is stored and sent to the DAT 17, and the first directory data D
1 is recorded on the DAT tape 1 (S2).

The microcomputer 14 stores directory data D1
Is checked (S3), and if it is determined to be normal, the same directory data is continuously recorded as the second directory data D2 in the directory area 2 of the DAT tape 1 (S4). ). When the directory data D1 is not recorded normally, the microcomputer 14 transfers the DAT tape 1 by the DAT 17 and sends the DAT tape 1 to the second directory position of the DAT tape 1 which is set in advance to record the second directory data. Then, the magnetic head is located so that the magnetic head comes to the head of the second directory, and the directory data D2 is recorded (S5).

The microcomputer 14 stores directory data D2
Is checked (S6), and if it is determined to be normal, the same directory data is continuously set as the third directory data D3 and the DAT
Continue recording in the directory area 2 of the tape 1 (S
7). If the directory data D2 has not been recorded normally, the DAT tape 1 is transported, moved to the position where the third directory data is recorded, and located so that the magnetic head comes to the head of the determined directory.
The directory data D3 is recorded (S8).

The microcomputer 14 stores directory data D3
Is checked (S9), and if it is determined to be normal, the same directory data is continuously stored in the fourth and fifth directory data D4, D
5 is continuously recorded in the directory area 2 of the DAT tape 1 (S10). If the directory data D3 has not been recorded normally, it is determined that the directory area of the DAT tape 1 has a defect, and the recording failure of the directory is displayed on the display 22 (S11).

FIG. 4 is a flowchart for explaining the operation of reading directory data during reproduction according to the present embodiment.
When a reproduction instruction is given by the operation switch 21, the microcomputer 1
4 controls the DAT 17, transfers the DAT tape 1, locates the magnetic head at the beginning of the third directory recorded in the directory area 2, reads the third directory recorded third time, The data is temporarily stored in the buffer memory 15 (S21). If the directory data D3 read into the buffer memory 15 is read normally without any omission (S22), the directory data D3 is transferred to and stored in the control memory in the microcomputer 14 (S23).

If the directory data D3 is not normally read in S22, the microcomputer 14 controls the DAT 17 to drive the DAT tape 1 and immediately locates the magnetic head so that the magnetic head comes to the head position of the next fourth directory data D4. Then, the fourth directory data D4 recorded for the fourth time is read and temporarily stored in the buffer memory 15 (S24). If the directory data D4 read into the buffer memory 15 is not normally read, the next directory data D5 is immediately read. When the directory data D4 read into the buffer memory 15 is normally read (S25), the directory data D4 is updated and stored in a control memory in the microcomputer 14 (S26).

If the directory data D4 is not correctly read in S25, the magnetic head is immediately located so that the magnetic head is located at the head of the next fifth directory, and the fifth recorded directory is read out from the buffer memory. 15 (S27). Buffer memory 15
If the directory data D5 read out to the buffer memory 15 is not normal, the data up to D3 and D4 stored in the control memory is used for control, and the directory data D5 read out to the buffer memory 15 is read out normally. If it has been (S28), the directory data D5 is updated and stored in the control memory in the microcomputer 14 (S29).

The microcomputer 14 checks whether directory data is stored in the built-in control memory (S30). If there is directory data stored in the control memory, the DAT 17 is controlled based on the directory data stored in the control memory to
The T-tape 1 is transferred, and the data 4 recorded in the data recording area 3 is searched by using directory data such as channel data and time data to reproduce the required data (S3).
1).

The microcomputer 14 searches the specified block of the channel specified by the operation switch 21 by the directory data, reproduces the specified data of the DAT tape 1, reads the block data from the DAT 17 into the buffer memory 15 in order. However, the directory data is read out to the directory RAM 16, and based on the time information and the channel information in the directory RAM 16, the data of the designated channel is read out from the buffer memory 15 to the reproduction memory 18 by extending the time axis, and the DA converter 19
To output the data of the designated channel from the output terminal 20.

If the directory data D3 to D5 cannot be read out and the data recorded in the data recording area 3 is to be reproduced, the missing portion of the directory data may be recovered after running the DAT tape 1 several times. is there. In such a case, the following control operation is further performed.

If the directory data is not stored in the control memory in the microcomputer 14 in S30, the microcomputer 1
4 increments the count by one and counts the number of times (S3
2). When the third time is exceeded, the process is terminated, and a failure of the read operation of the directory data is displayed on the display 22 and stopped (3).
9).

Until the count exceeds 3 in S32, the microcomputer 14 controls the DAT 17, transfers the DAT tape 1, locates the magnetic head so that the magnetic head is at the head of the first directory, and records the first recorded data. 1 is stored in the read buffer memory 15 (S33), and the directory data D read into the buffer memory 15 is read.
If 1 is not normal, the next directory data is immediately read. When the microcomputer 14 determines that the directory data D1 read to the buffer memory 15 is normal (S34), the microcomputer 14 stores the directory data D1 in a control memory in the microcomputer 14 (S35).

Next, the microcomputer 14 controls the DAT 17, locates the magnetic head at the head of the second directory data D2 of the DAT tape 1, and reads the second directory data D2 recorded for the second time. Then, the directory is temporarily stored in the buffer memory 15 (S36), and if the directory data D2 read to the buffer memory 15 is not normal, the next directory is immediately read. When the microcomputer 14 determines that the directory data D2 read into the buffer memory 15 is normal (S3
7) The directory data D2 is updated and stored in the control memory of the microcomputer 14 (S38), and the process returns to the initial S21.

According to the present invention, when the table of contents information of the recording data recorded on the tape is recorded in the directory recording area, the directory area is widely used and the target tape position is used as the directory data recorded for the third time. In this case, the head is positioned to a position where the head has passed the position of the directory data recorded the third time, the first and second directory data are preliminarily recorded, the target directory data is recorded the third time, and Since it was repeatedly recorded several times later, even if a dirt or dirt collected by the recording head caused a missing portion at the front of the directory data, the probability that the subsequently repeatedly recorded directory data was lost together and became unreproducible was reduced. can do.

Further, according to the present invention, when reading out directory data in which a table of contents of recording data recorded on a tape is read out, the same directory data is preliminarily recorded in a directory area a plurality of times, and the third directory data is first recorded. Is read out and used as control directory data, the probability that directory data is lost in the first read operation and playback becomes impossible can be reduced, and data recorded in the data recording area can be reproduced quickly. .

According to the present invention, the same directory data as the directory data such as the index information of the recording data recorded on the tape-shaped recording medium is recorded a plurality of times in the directory area. Even if the recording medium is mounted on another recording device with a dirty head, even if the recording medium is not a dedicated tape used for a recording device provided with a large number of repeated recordings, the second and third reading operations of the directory data will cause It is possible to reduce the probability that the dirt is removed and the directory data is lost and cannot be reproduced.

[0043]

According to the present invention, when the table of contents information of the recording data recorded on the tape is recorded in the directory recording area, the tape-shaped recording medium is used such that the head is positioned to a position where the directory area is widely used and passed. To prevent re-recording of directory data from being lost at the front even if the directory data is lost due to dust or dirt collected by the recording head. can do.

[Brief description of the drawings]

FIG. 1 is a block diagram of a recording and reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a positional relationship of data on a DAT tape recorded by a recording apparatus according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating a recording operation of directory data of the recording apparatus according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a reproduction operation of directory data of the recording apparatus according to the embodiment of the present invention.

FIG. 5 is a diagram showing a positional relationship of data on a DAT tape recorded by a conventional recording device.

[Explanation of symbols]

 1 DAT tape 1a Magnetic tape end 2 Directory area 3 Data recording area 4 Record data 5 Directory data 11 Input terminal 12 AD converter 13 Recording memory 14 Microcomputer 15 Buffer memory 16 Directory RAM 17 DAT drive 18 Reproduction memory 19 DA converter Reference Signs List 20 output terminal 21 operation switch 22 display

Claims (5)

[Claims] 1. An apparatus for recording digital data on a tape-shaped recording medium, wherein the digital data is recorded in a second recording section of a first recording section and a second recording section provided on the recording medium. A data recording unit for driving the recording medium, the second recording section and the first
And a recording means for repeatedly recording the directory data of the digital data recorded in the second recording section in the first recording section a plurality of times. Recording device. 2. An apparatus for recording digital data on a tape-shaped recording medium, wherein the digital data is recorded in a second recording section of a first recording section and a second recording section provided on the recording medium. A data recording unit for driving the recording medium, the second recording section and the first
A driving unit for transferring a recording position to a recording section, a recording unit for repeatedly recording the directory data of the digital data recorded in the second recording section a plurality of times in the first recording section, Reading means for reading the directory data recorded in a first recording section; and the data recorded in the second recording section based on directory data read last among a plurality of directory data read by the reading means. A recording device comprising a reproducing means for reproducing the data. 3. An apparatus for recording digital data on a tape-shaped recording medium, wherein the digital data is recorded in a second recording section of a first recording section and a second recording section provided on the recording medium. Data recording means for driving the recording medium, the second recording section and the first
A driving unit for transferring a recording position to a recording section, a recording unit for repeatedly recording directory data of the digital data recorded in the second recording section in the first recording section a plurality of times, Reading means for sequentially reading the directory data excluding both ends of the directory data recorded a plurality of times in the first recording section; and reading out the plurality of directory data read out by the reading means based on the directory data recorded later. A recording apparatus comprising: a reproducing unit that reproduces the data recorded in a second recording section. 4. An apparatus for recording digital data on a tape-shaped recording medium, wherein the digital data is recorded in the second recording section of a first recording section and a second recording section provided on the recording medium. A data recording unit for driving the recording medium, the second recording section and the first
A driving unit for transferring a recording position to a recording section, a recording unit for repeatedly recording directory data of the digital data recorded in the second recording section in the first recording section a plurality of times, Reading means for sequentially reading the directory data, excluding both ends, of the directory data recorded a plurality of times in the first recording section; and up to the last recorded directory data of the plurality of directory data sequentially read by the reading means. Means for returning to the top of the directory data when reading is not possible, and repeatedly reading the directory data; and the directory data recorded in the second recording section based on directory data recorded later among the directory data obtained by repeated reading. Equipped with playback means for playing back data A recording device, comprising: 5. A tape-shaped recording medium on which digital data is recorded, wherein the recording medium has a first recording section and a second recording section in a direction in which the recording medium is conveyed. The recording medium, wherein the digital data is recorded, and directory data of the digital data is recorded a plurality of times in the first recording section.