JPH0831111A - Information recording / reproducing device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable good data reproduction even if there is an off-track on the pattern during compatible reproduction, and to obtain reliable information management. In a recording / reproducing apparatus for recording / reproducing information such as data or control commands on a recording medium, the relative speed between the recording medium and the signal reading means is driven at a speed which is 1 / real times as high as that at the time of recording to reproduce input data. An information storage / reproduction device having a means for detecting an error and a reproduction means for outputting only reproduction data having an error smaller than a predetermined value. [Effect] It is possible to reproduce the data signal recorded on the recording medium without omission, and to eliminate the data reading failure due to off-track or the like, and the effect of ensuring information management can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information storage / reproduction device suitable for data management of an information system such as a computer.

[0002]

2. Description of the Related Art Various information storage devices have been developed to reflect the advanced information society. A typical example is a helical magnetic memory reproducing device.

In the conventional device, as a method for securing the S / N of the reproduced signal, as described in Japanese Patent Laid-Open No. 61-72484, pilot signals in a plurality of areas are used for tracking control during standard reproduction. There is a configuration in which the tracking control of the standard reproduction is offset for tracking control during special reproduction.

On the other hand, in order to cope with high-level information processing, the data storage / reproduction device is required to have high efficiency, high accuracy, large capacity, and cost performance. Along with this, particularly in information compatible reproduction, track tracking during off-tracking is required to be simple, highly efficient, and highly accurate. On the other hand, the above-mentioned publicly known example does not support high efficiency in reproduction and faithful and highly accurate reproduction of one track, and supports compatible reproduction of large capacity and high density information. Not not.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to store data suitable for ensuring high efficiency, high precision reproduction of data and compatible reproduction operation of information. It is to provide a reproduction method.

[0006]

In order to achieve the above object, the reproducing means of the present invention uses the relative speed of the data signal portion recorded on the recording medium and the reproduction output reading means at the time of recording.
There is provided means for detecting an error in the data reproduced by the reproduction output reading means and outputting only reproduction data having an error smaller than a predetermined value.

Further, there is provided speed control means for generating a signal for controlling the relative speed between the recording medium and the signal reading means to be 1 / real multiple of that at the time of recording when the error rate of the reproduced data is larger than a predetermined value.

Further, there is provided a variable speed driving means for discriminating the magnitude of the error rate of the reproduction data detected by the error detecting means and varying the relative speed between the reproducing means and the recording medium from a predetermined value to the large or small. Furthermore, storage means for storing the reproduction data from the reproduction means in a memory,
And a signal processing means for outputting the reproduction data as one unit of data.

Further, at the time of recording the information, there is provided identification means for recording / reproducing a signal for identifying at least the information storage / reproduction device at the start or end position of the data on the recording medium or at a predetermined portion on the tape pattern.

Further, there is provided drive control means for controlling the drive means by the signal from the identification means.

[0011]

In the reproducing means, the signal reading means reliably crosses the data signal portion recorded on the recording medium a real number of times to reproduce the data signal without omission. As a result, it is possible to eliminate defective reading of data due to off-track or the like.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the basic principle of an example in which the present invention is applied to a helical scan type magnetic recording / reproducing apparatus.
FIG. 3 is a diagram showing the overall configuration of a tape running system including a rotating drum in a helical scan type magnetic recording / reproducing apparatus. FIG. 3 shows the off-track amount of a recording pattern and a reproducing pattern for controlling the tape speed of the present invention. 5 is a block diagram for recognizing the recording pattern of the present invention, and FIG. 4 is a block diagram for reading the recording pattern of the present invention in N divisions and reproducing and storing one piece of data by combining N divided data. Is a block diagram for controlling the tape speed again after reproducing and recognizing one data. FIG. 6 recognizes the off-track amount between the recording pattern and the reproducing pattern.
FIG. 7 is a block diagram of the present invention for controlling the tape speed to a variable speed according to the off-track amount. FIG. 7 shows a control signal and a user's recording on the tape pattern recorded in the helical scan type magnetic recording / reproducing apparatus. FIG. 6 is a block diagram showing a control method for efficiently recording the code number information of the reproducing apparatus, the address information of the tape pattern from the start of recording, and the like for efficiently carrying out the present invention.

FIG. 8 shows another embodiment in which the present invention is applied to a recording / reproducing apparatus for a laser disk, a magnetic disk or a magneto-optical disk.

First, the operation of this embodiment will be described.

FIG. 2 is a diagram showing the overall configuration of a helical scan type magnetic recording / reproducing apparatus. In this system, the rotary drum 1, the magnetic tape 2, the tilt guides 3, 4,
The magnetic tape running system is composed of the width regulation guide rollers 5 and 6. A means for recording / reproducing a signal on / from the magnetic tape 2 is a head 7, which is mounted on the rotary drum 1. The magnetic tape 2 is wound around the rotary drum 1 by the tilt guides 3 and 4 and is run at a predetermined speed. The magnetic tape 2 is rotated by the tilt guides 3 and 4.
The tape travels across a plurality of guide groups such as the width-regulating guide rollers 5 and 6, and the mutual relationship between the guides delicately determines the stability of tape travel.

Next, an outline of an embodiment of the present invention will be described with reference to FIG.

The present invention is a data recorder for information equipment such as a computer, or high-definition or video-on
It is applied to a helical scan type magnetic recording / reproducing apparatus used in a VTR or the like which is a data recording / reproducing apparatus for demand or the like.

FIG. 1 shows this basic principle, namely the tape pattern 8 and the reproducing method according to the present invention. Data signals sent from information devices such as computers,
Alternatively, the control signal may be the tape pattern 8 with diagonal lines in FIG.
Recorded above.

Next, when reproducing the data signal recorded on the tape pattern 8 with diagonal lines, the tape running speed is 1 / real multiple of the recording speed, for example, 1 / N (N = 1, 2, 3 ... ...), and the trace locus 9 of the reproduction output reading means 7 such as a magnetic head is controlled so as to traverse the diagonal pattern 8 in a real number of times, and the data signal recorded on the diagonal tape pattern 8 is recorded. Read it by dividing it into real numbers. Of course, even if the head traces a portion other than the tape pattern 8 from which data is to be read, the read signal is determined to be an error or a signal of another tape pattern.
As a result, only the signal data having an error smaller than the predetermined value is reproduced. The reproduced data is accumulated in the memory from the reproduction signal output means, whereby the data recorded on one tape pattern 8 is reproduced without omission.

As shown in FIG. 7C, a real number of the read data 10 is accumulated in the storage circuit during the time t, and if each read data is not the unit data 11 which can be utilized in the system, The data are gradually combined, or are combined at the time when a real number of data are stored in the storage circuit, and are stored in the memory as one unit data 11 as shown in FIG.

Normally, the tape running speed is set to be the same as that at the time of recording as shown by the diagonal tape pattern 8, and one reading of the tape pattern 8 causes the unit data for one tape pattern as shown in FIG. It is equipped with a configuration for playing 11.

On the other hand, when the data read by dividing the tape pattern 8 into 1 / real numbers becomes the unit data 11, it is stored as it is in the memory as shown in FIG.

FIG. 3 is a block diagram for recognizing the off-track amount 12 of the recording pattern 8 and the reproduction pattern (trace locus) 9 for controlling the tape speed of the present invention.

First, the tape pattern 8 recorded on the tape 2 running by the drive of the capstan motor 13
And the error rate due to the deviation of the scanning locus 9 of the magnetic head 7, that is, the off-track amount 12, for example, the error detection means (that is, the reproduction output level detection means 28 detects the output level of the data reproduction signal, The output level of (1) is compared by the arithmetic processing means (14) to calculate the level difference and the like and quantify it) to determine the state where the off-track amount 12 exceeds the allowable value, that is, the off-tracking state. In this state, the running speed of the tape 2 is controlled to be 1 / real number times that at the time of recording, for example, 1 / N (N = 1, 2, 3, ...) 1
The / N tape speed control means 26 generates a control signal to control the capstan motor 13. If off-track amount 12
Is less than the allowable value, the capstan motor 13 is controlled by the normal tape speed control means 27 to the normal rotation speed. As a result, since the normal speed reproduction and the 1 / N speed reproduction are combined and controlled, the data reproduction time can be shortened and higher efficiency can be expected.

FIG. 4 shows a recording pattern 8 according to an embodiment of the present invention, which is divided into N pieces and read, and N pieces of divided data 10 are read.
FIG. 6 is a block diagram showing a control system configuration for reproducing one piece of data on the tape pattern 8 in combination with each other and storing it in the normal data storage means 15 such as a main memory.

This is because if the data reproduced at the normal tape speed, for example, the reproduction signal obtained by reading the tape pattern 8 by the magnetic head 7 in one trace is a predetermined number of data, for example, if it is the same amount as the unit data 11. For example, each individual data 10 is stored in the main memory 15 for each trace.

On the contrary, if the reproduced signal corresponds to 1 / real number of unit data, for example, 1 / N (N = 1, 2, 3 ...), this is reproduced one after another, The real number is stored in the 1 / N data storage means 16 which is a sub memory. Then, when the data is gradually combined or when a real number is stored in the sub memory 16, the 1 / N data assembling arithmetic processing means 1
The combination calculation is performed by 7, and the data for one piece of the tape pattern 8, that is, the unit data 11 is accurately reproduced and stored in the main memory 15.

At this time, one tape pattern is used as unit data.
In some cases, it corresponds to one unit data 11 by adding several data, or tape pattern 1 / N
The unit data may be even partly, and the unit amount stored in the sub memory 16 or the main memory 15 is especially 1
It is not limited to the individual unit data 11.

As a result, incomplete data is always recorded in the memory as a unit data 11 that can be utilized in the main body due to a combination or the like. Therefore, by extracting the data in real time and utilizing it for reproduction control, You can further improve itself.

Since the 1 / N data and the unit data are stored in separate memories, the data can be easily distinguished inside the main body.

FIG. 5 shows that when a predetermined amount is stored in the main memory 15 by the operation of FIG. 4, for example, one unit data 11 is reproduced and one is stored in the main memory 15, and then the tape speed is changed again. The block diagram which shows the structure for controlling again to predetermined speed is shown.

That is, in this block diagram, the number of unit data 11 stored in the main memory 15 is counted by the normal data number time counter 18, and a predetermined amount, for example, one or N unit data 11 is stored. After confirming that this has been done, a control method for changing the tape speed to the normal speed is shown. Of course, if the count number is less than the predetermined amount, the control for running the tape 2 at the tape speed of 1 / N (N = 1, 2, 3, ...) Is continued.

Furthermore, it is easily conceivable to combine and relate the control systems of FIGS. 3, 4 and 5.

Further, N blocks are transmitted between the blocks with N as an argument, N sub memories 16 are opened from the 1 / N speed, and N × C (C: constant) main memories 15 are opened.
It is also possible to perform an operation such as allocating N × D (D: constant) address to each data 10.

As a result, the tape speed is returned to the normal speed, and the control of FIG.
It can be realized automatically and easily. Further, by associating the argument N with the count number, the entire control can be performed efficiently and accurately.

FIG. 6 shows a variable speed driving means for recognizing the off-track amount 12 of the recording pattern 8 and the reproduction pattern 9 of the present invention and controlling the tape speed to a variable speed in accordance with the off-track amount 12. The block diagram of is shown.

The amount of deviation between the tape pattern 8 recorded on the tape 2 running by the drive of the capstan motor 13 and the scanning locus 9 of the reproducing means such as the magnetic head 7, that is, the off-track amount 12 (error rate) is Within a predetermined range, for example, 0% to M% (M = 0 to 70), a capstan motor 13 for reproducing at a normal tape speed, for example, the same speed as during recording.
Control. On the other hand, if the off-track amount 12 is outside the predetermined range, for example, L to 100% or more (L = 100-M), then 1 /
The capstan 13 is reproduced at a predetermined tape running speed of N, for example (N = real number). This is the variable speed drive means.

The N value of the 1 / N tape speed control set when the off-track amount 12 is outside the predetermined range is the off-track follow-up 1 / N tape speed calculating means 19. The larger the off-track amount 12 is, the slower the tape speed is, and the tape pattern 8 is subdivided so that the signal data can be reliably traced.

The value of N can be changed by following a predetermined amount, for example, the off-track amount 12 in real time every time one tape pattern 8 is read.

Here, the value of M depends on the characteristics of the system, but even if M = 30 is set, if data can be easily reproduced, M can be changed. As a result, like when playing back digital signals,
If data can be reproduced even if the off-track amount 12 is large, M is set to a large value. If data cannot be reproduced even when the off-track amount 12 is small, such as when reproducing an analog signal, M is set to M. Is set to a small value and the system can freely set M
Can be changed, and the application range of the present invention is wide.

FIG. 7 shows an identification means for recording and reproducing identification information on the tape pattern 8 according to the present invention. By the identifying means, the data signal or the control signal 20 first sent from the information device such as a computer is shown in FIG.
It is recorded on the tape pattern 8 as shown in (c). First, the control information 20 such as position information indicating the start position of the data signal, code number information of the user's recording / reproducing device, and address information from the beginning of each tape pattern 8 is recorded at the first position on the tape pattern 8. Further, at the end position of the data, a control signal 20 such as position information indicating the end position and code number information of the recording / reproducing apparatus of the user is recorded.

After that, the recording / reproducing apparatus is rewound to the start position, and at the time of reproduction, the control signal for the start is read, and first, the code number of the user's recording / reproducing apparatus recorded on the tape 2 and his / her own recording / reproducing apparatus. The normal speed control process is performed only when the code number registered in the above item coincides, that is, in the case of recording / reproducing with the same model. On the contrary, when the code numbers do not match, a control signal such as position information indicating a reproduction start position and address information for searching a specific section is searched for, while controlling the search and the like in accordance with a user's instruction, and also the tape pattern 8 And the deviation amount of the locus of the magnetic head 7, that is, the off-track amount 12, is detected.
Depending on the, the tape running speed is multiplied by 1 / real number and reproduction is performed.

Further, as shown in FIG. 5A, the reproduction of the tape 2 proceeds,
At the time of reaching the end position or at the time of reading one segment of data, the position information indicating the start and end positions of the first reproduction, the code number information of the recording / reproducing device of the user, the address of the data, etc. The control information 20 is stored and recognized on the tape 2, and the relation between the code number information of the recording / reproducing devices of various users and the proper reproducing speed is learned and stored in the main body.

Therefore, at the time of reproducing the new data tape 2 after the second time, the proper reproduction speed is determined from the code number information of the recording / reproducing apparatus of various users recorded on the new data tape 2. Therefore, the speed at the time of compatible reproduction is set to the off-track amount between the recording / reproducing apparatus of each user and the recording / reproducing apparatus of oneself without performing the operation of rereading the tape 2 at the time of off-track.
It is possible to change information freely according to 12 and read information efficiently.

However, for example, when the user wants to reproduce another tape 2, the tape 2 is once taken out and then reproduced again, the tape pattern 8 is not always located at the start position or the end position due to slack of the tape 2 or the like. In some cases, the recording / reproducing apparatus moves the tape 2 for several seconds, searches for a start position or end position between them, and determines the appropriate reproduction speed as in the first reproduction.

Further, the control information 20 is recorded at the start and end positions of the tape 2 in one recording / reproducing operation, but the present invention is not limited to this, and as shown in FIGS. , For example, recording for each tape pattern 8, recording for every several tape patterns 8, or the beginning of one recording,
It may be possible to record only at the end position and the end position, or to record at a position unique to each model, or to record at a sub-track adjacent to the tape pattern. It is easy to think of recording at a suitable place for each information. To be

Further, the control information 20 shown in FIGS.
By combining the recording patterns of
If the control information 20 is recorded on the tape pattern 8 on the way other than the end position, the tape 2 will be recorded on the tape 2 during reproduction.
Even if the taking-out operation is performed, the above search and data control such as appropriate speed control can be performed, and high efficiency can be achieved.

On the other hand, the position information indicating the start and end positions, the code number information of the recording / reproducing apparatus of the user, the control information 20 such as the address of the data may be recorded by the fixed head.

Further, it is possible to use the above method in reverse, so that the reproduction by another specific recording / reproducing apparatus cannot be reproduced because the code number information of the recording / reproducing apparatus of the user is different. Further, rewinding by another recording / reproducing apparatus cannot be performed as a result because the start position or end position cannot be found. Therefore, the user can only reproduce and rewind with the same recording / reproducing apparatus, and can be used for highly accurate software or data copyright protection and confidentiality protection.

By these methods, a wide range of control of data storage and reproduction can be performed, and it is also useful as a function of, for example, data editing or random access to specific data by a computer.

FIG. 8 shows a schematic configuration diagram in which this embodiment is applied to disk reproduction.

The present invention can also be utilized in an apparatus for recording / reproducing data on / from a disk 21 such as a laser disk, a magnetic disk or a magneto-optical disk.

That is, FIG. 10A is a principle diagram of the disk recording / reproducing apparatus, in which the signal recording / reproducing means 22 such as a laser head or a magnetic head is moved at a predetermined speed in the radial direction of the disk 21 to form a spot 25. Thus, a data signal and a control signal are recorded and reproduced as a concentric pattern 23 on the surface of the disk 21. On the other hand, FIG. 6B shows the trace pattern of the recording pattern 23 and the head 22 on the surface of the disk 21 at the normal time
24 is shown.

Here, the disk 21 rotates eccentrically,
There are disk rotation unevenness unique to the system, linear movement unevenness of the head 22, and the like. Therefore, as shown in FIG. 7C, a deviation amount between the pattern 23 of the data signal recorded on the disk 21 and the scanning locus 24 of the signal reading means, that is, the off-track amount 12, is generated during the compatible reproduction. Therefore, in order to detect this and read the data without omission, the moving speed of the head 22 in the disk radial direction is multiplied by 1 / real number of the normal speed, and the concentric signal pattern 23 is set in the radial direction as shown in FIG. Divide into and reproduce data without omission.

Alternatively, as shown in FIG.
The disk 24 is reciprocated in the radial direction of the disk 21, and the rotation speed of the disk 21 is also changed to trace the concentric signal pattern 23 including the off-track portion evenly and reproduce the data without omission.

Further, it is easily conceivable to configure the above-mentioned disk system by combining the control methods shown in FIGS. 3, 4, 5, 6, and 7.

However, in this case, the moving speed of the head, the reciprocating motion of the head, the disk rotation speed, and the like are control targets that are changed during off-track.

As a result, even in a storage / playback apparatus using a disc, it is possible to achieve accurate data storage / playback with a simple structure and high efficiency.

[0059]

According to the present invention, when the recording medium is reproduced,
Since the recorded information recorded on the pattern can be reproduced without omission, good data reproduction is possible even if there is an off-track on the pattern during compatible reproduction, and the effect of ensuring information management can be obtained.

[Brief description of drawings]

FIG. 1 is a basic principle diagram of an example in which the present invention is applied to a helical scan type magnetic recording / reproducing apparatus.

FIG. 2 is an overall configuration diagram in one embodiment of the present invention.

FIG. 3 is a block diagram of a control system according to an embodiment of the present invention.

FIG. 4 is a control system block diagram of the same.

FIG. 5 is a control system block diagram of the same.

FIG. 6 is a block diagram of a control system of the same.

FIG. 7 is a basic principle diagram showing the position of a control signal on a pattern in one embodiment of the present invention.

FIG. 8 is a basic principle diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 ... Rotating drum, 2 ... tape, 7 ... head, 8 ... tape pattern, 9 ... trace locus, 11 ... unit data, 12 ... off-track amount, 15 ... main memory, 16 ... sub memory, 20 ... control signal.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location H04N 5/783 Z 5/94 Z

Claims (6)

[Claims] 1. A reproducing means for reading data, a control command, or the like from a recording medium, a driving means for driving a relative speed between the reproducing means and the recording medium at a speed of 1 / real number times that at the time of recording, and the reproducing. An error detecting means for detecting an error in the reproduced data from the means, and a reproduced signal output means for outputting only the reproduced data when the error detected by the error detecting means is less than a predetermined value. Information storage / reproduction device. 2. A signal for controlling the relative speed between the recording medium and the signal reading means to be 1 / real number times that at the time of recording when the error rate of the reproduction data detected by the error detecting means is larger than a predetermined value. The information storage / reproduction device according to claim 1, further comprising speed control means for generating the speed. 3. A variable speed drive means for determining the magnitude of the error rate of the reproduction data detected by the error detection means, and varying the relative speed between the reproduction means and the recording medium from a predetermined value to a large or small value. The information storage / reproduction device according to claim 1 or 2, wherein 4. A storage means for storing the reproduction data from the reproduction means in a memory, and a signal processing means for outputting the reproduction data as one unit data. Alternatively, claim 2 or claim 3
Information storage and reproduction device described. 5. A discriminating means for recording / reproducing at least a signal for discriminating an information storage / reproducing device at a start or end position of data on a recording medium or a predetermined portion on a tape pattern at the time of recording information. Claim 1 or claim 2 or claim 3, characterized in that
The information storage / reproduction device according to claim 4. 6. A drive control means for controlling the drive means according to a signal from the identifying means is provided, or claim 1, 2, or 3, or 4, or 4. Item 5. The information storage / reproduction device according to item 5.