JP2000339847A - Information recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the information recorded on an information recording medium such as a compact disk from being duplicated, and also to prevent the information recorded on the recording medium from leaking to a 3rd party. SOLUTION: This information recording and reproducing device is provided with heads 24a, 24b for reading information recorded on both surfaces of a recording medium 30, and a control part 28 for rearranging the information read by the heads 24a, 24b based on the order information instructing recording order to the recording medium 30. The order information is transferred from a terminal station 10 to the control part 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing apparatus, and more particularly to an information recording / reproducing apparatus for writing / reading information to / from a recording medium such as an optical disk.

[0002]

2. Description of the Related Art In recent years, with advances in multimedia technology, information such as documents, voices, still images, and moving images has been digitized and processed by a processing device such as a computer. In particular, since audio, still images, and moving images have a large amount of data, they are generally distributed using a recording medium such as a compact disk. On a recording medium such as a compact disk, information is basically recorded continuously spirally from the center to the outer periphery of the disk, so that it is extremely easy to copy information.

In recent years, in order to record a moving image having an extremely large amount of information on one recording medium, a DVD (Digital Video
A recording medium called a "deo disk" and a device for writing or reading information to or from this recording medium have been put to practical use.

[0004]

As described above, since the recording method of a recording medium such as a compact disk is simple, it is easy to copy information. In order to prevent duplication, a technology for performing copy protection has been devised, but this does not solve the fundamental problem of duplication prevention. Since a recording medium such as a compact disk has a low manufacturing unit price, it is considered that various information will be supplied through such a recording medium in the future. Further, information that needs to be prevented from being known to a third party may be recorded. Therefore, it will be extremely important in the future to prevent duplication of information recorded on these media and prevent leakage of information to third parties.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and prevents duplication of information recorded on an information recording medium such as a compact disk, and prevents third parties from transmitting information recorded on these recording media. It is an object of the present invention to provide an information recording / reproducing apparatus which can prevent the information from being leaked.

[0006]

In order to solve the above-mentioned problems, the present invention provides a reading means for reading information recorded on both sides of a recording medium, and the information read by the reading means to the recording medium. And a rearranging means for rearranging according to the order information indicating the recording order. The information processing apparatus further includes an instruction unit that instructs reading of information recorded on the recording medium, and the order information is transmitted from the instruction unit. Further, the rearranging means includes:
The information after the rearrangement is transmitted to the instruction means. Further, the present invention provides a reading unit for reading information recorded on both sides of a recording medium, and for the information read by the reading unit, information read from the lower surface of the recording medium and information read from the upper surface of the recording medium alternately. It is characterized by comprising transmitting means for transmitting, and processing means for performing a process of rearranging the divisions transmitted from the transmitting means in accordance with order information indicating a recording order on the recording medium. Also, the present invention
Reading means for reading information recorded on both sides of the recording medium, and for the information read by the reading means,
Output means for alternately transmitting information read from the lower surface and information read from the upper surface of the recording medium, and a process for rearranging the divisions transmitted from the output means in accordance with order information indicating a recording order on the recording medium And processing means for performing the following. Further, it is characterized by comprising a storage means for storing the order information. Also,
According to the present invention, there is provided a generating unit for generating order information indicating an order of recording information on an upper surface or a lower surface of a recording medium, a transfer unit for transferring the order information, and information for recording on the recording medium. Recording means for recording the information transferred to the upper surface or the lower surface of the recording medium based on the order information.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an information recording / reproducing apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a part of a recording medium on or from which information is written or read by an information recording / reproducing apparatus according to an embodiment of the present invention. The recording medium 1 shown in FIG. 1 can record on both sides. The recording medium 1 is, for example, a compact disk or a DV capable of recording information on both sides.
D.

In this embodiment, data storage areas having the same structure are provided on the upper and lower surfaces of the recording medium 1 in plane symmetry. The information may be continuous spirally from the center to the outer periphery of the disc as in the case of the conventional compact disc. However, the upper and lower surfaces of the recording medium 1 form a plane-symmetric data recording area of the same structure. There is a need to.

In this embodiment, a description will be given assuming that information is recorded in a track format. In FIG. 1, T
Reference numeral 1 denotes a track formed on the upper surface of the recording medium 1;
Reference numeral 2 denotes a track formed on the lower surface of the recording medium 1.
The track T1 is provided with a plurality of data storage areas for recording information. These data storage areas
It has a predefined size (for example, 2048 bytes).

In FIG. 1, for example, a data storage area indicated by reference numeral S1 is formed on a track T1. Similarly, the track T2 also has a plurality of data storage areas for recording information. Here, the data storage area S2 formed on the track T2 is a data storage area having the same structure as the data storage area S1 formed on the track T1.

Next, an information recording / reproducing apparatus according to an embodiment of the present invention will be described in detail. FIG. 2 is a block diagram showing a schematic configuration of the information recording / reproducing apparatus according to one embodiment of the present invention. As shown in FIG. 2, the information recording / reproducing apparatus according to one embodiment of the present invention is roughly divided into a terminal device 10 that controls writing or reading of information and processes the written information and the read information. An information writing / reading apparatus 2 for writing information on a recording medium and reading information from the recording medium under the control of the information processing apparatus 10
It consists of 0. The information writing / reading device 20 may perform only reading of information recorded on the recording medium, or may perform only writing of information on the recording medium.

The information writing / reading device 20 includes a head 24a for writing information on the upper surface of the recording medium 30 and reading the recorded information and a head 24b for writing information on the lower surface of the recording medium 30 and reading the recorded information. And These heads 24a and 24b may be only data write heads for writing information on the recording medium 30, or may be only data read heads for reading information from the recording medium 30. Head 2
4a and 24b are realized by, for example, an optical pickup that optically writes and reads information.

In FIG. 2, reference numerals 22 denote heads 24a, 24
This is a head control unit that controls the operation of b. In the present embodiment, as shown in FIG. 2, the head 24a is provided on the upper surface side of the recording medium 30 and the head 24b is provided on the lower surface side of the recording medium 30.
Since the configuration is the same as that of the recording medium 1 shown in FIG. 1, the heads 24a and 24b are controlled so as to read or write data at plane symmetrical positions on the upper and lower surfaces of the recording medium 30.

The heads 24a and 26b are respectively
information read from the heads 24a, 2b
4b is a buffer memory for temporarily storing information to be written. 28 monitors the remaining amounts of the buffer memories 26a and 26b, and monitors the terminal device 10 and the information writing / reading device 20.
This is a control unit that controls the transfer of data transmitted and received between and. The control unit 28 is connected to the terminal device 10 by a bus capable of bidirectional data transmission. The control unit 28 reads out the data from the heads 24a and 24b,
a, 26b are read out in a predetermined order and transferred to the terminal via the bus. In addition, information transferred based on data transferred from the terminal device 10 via the bus is written in the buffer memories 26a and 26b in a predetermined order.

Next, the operation of the information recording / reproducing apparatus according to one embodiment of the present invention will be described. In the following description, an operation when data is read from the recording medium 30 will be described. FIG. 3 is a diagram for explaining an operation at the time of data transfer of the information recording / reproducing apparatus according to one embodiment of the present invention. In FIG. 3, the same members as those shown in FIG. 2 are denoted by the same reference numerals.

Hereinafter, the data storage area of the recording medium 30 will be 4
An operation for reading information recorded using more than an area (in FIG. 3, data recorded using 16 areas is considered) will be described. First, when the read data of the recording medium 30 is transferred from the terminal device 10, the control unit 28 receives this data and
The head control unit 22 is instructed to read information recorded at a predetermined position of 0. Note that the data transferred from the terminal device 10 is control data for specifying information to be read and information indicating the storage order of the data.

The information indicating the data storage order is denoted by reference numeral D3 in FIG. In the example of FIG.
The information D3 indicating the data storage order is “1123431”.
1 ". This information has the following meanings in order from the beginning of the data.-Information read from the lower surface of the recording medium 30 is transferred by one block-Information read from the upper surface of the recording medium 30 is transferred by one block- The information read from the lower surface of the recording medium 30 is continuously transferred for two blocks. The information read from the upper surface of the recording medium 30 is continuously transferred for three blocks. The information read from the lower surface of the recording medium 30 is continuously transferred for four blocks. The information read from the upper surface of the recording medium 30 is transferred one block at a time. The information read from the lower surface of the recording medium 30 is transferred one block.

The head controller 22 reads information from the recording medium 30 in accordance with an instruction from the controller 28. In FIG. 3, the symbol D1 indicates information read from the upper surface of the recording medium 30 by the head 24a, and the symbol D2 indicates information read from the recording medium 3 by the head 24b.
0 indicates the information read from the lower surface of 0. The numbers assigned to these pieces of information indicate the order in which the data is stored on the upper and lower surfaces of the recording medium 30. Heads 24a, 24
b, the information read by the buffer memory 2
6a and 26b.

When all the information instructed to be read from the terminal device 10 is read, or when the memory buffer 26
When the remaining amounts of the data a and 26b are exhausted, the control unit 28 stores the data transferred from the terminal device 10 in the buffer memories 26a and 26b based on the information D3 indicating the storage order of the data. Start the transfer of information that has been

As described above, the information D3 indicating the data storage order is “11234311”, and the control unit 28
According to this information, the information recorded in the buffer memories 26a and 26b is sequentially read and transferred. More specifically, since the head of the information D3 indicating the data storage order is “1”, the control unit 28
One block of information read from the lower surface of the recording medium 30 stored in the storage medium 6b is read out and transferred. In this case, the information of the block numbered "1" is transferred.

Since the information D3 indicating the data storage order is "1", the control unit 28
The information read from the upper surface of the recording medium 30 stored in a is read out for one block and transferred. Transfer this. In this case, the information of the block numbered “2” is transferred. Next, information D3 indicating the data storage order
Is “2”, the control unit 28
The information read from the lower surface of the recording medium 30 stored in the storage medium 6b is read out for two blocks and transferred. In this case, the information of the blocks numbered "3" and "4" is transferred.

Next, since the information D3 indicating the data storage order is "3", the control unit 28
The information read from the upper surface of the recording medium 30 stored in b is read out for three blocks and transferred. Transfer this. In this case, information of the blocks numbered "5", "6", and "7" is transferred. Next, since the information D3 indicating the data storage order is "4", the control unit 28
Is the recording medium 3 stored in the buffer memory 26b.
The information read from the lower surface of 0 is read for 4 blocks,
Transfer this. In this case, the numbers “8”, “9”, “1”
Information of the blocks to which "0" and "11" are added is transferred.

Next, since the information D3 indicating the data storage order is "3", the control unit 28
The information read from the upper surface of the recording medium 30 stored in b is read out for three blocks and transferred. In this case, information of the blocks numbered "12", "13", and "14" is transferred. Thus, the control unit 28
Transfers the information recorded on the recording medium 30 to the terminal device 10 in accordance with the information D3 indicating the storage order of the data transferred from the terminal device 10, and the information transferred to the terminal device 10 in FIG. Are arranged in the correct order like the information indicated by the reference symbol D4.

If the information D3 indicating the data storage order is not transmitted from the terminal device 10 to the control unit 28,
The control unit 28 sends a recording medium 30 to the head control unit 22.
Since the device instructs to read only the information recorded on the lower surface of the recording medium 30, the information recorded on the recording medium 30 cannot be correctly read by an apparatus having no information D3 indicating the data storage order. As described above, in the present embodiment, the storage order of the information to be recorded on the recording medium 30 is
Since it is separate from the recording medium 30, it is possible to prevent duplication of information recorded on the recording medium and prevent leakage of information recorded on these recording media to third parties.

Next, an information recording / reproducing apparatus according to another embodiment of the present invention will be described. FIG. 4 is a block diagram showing a schematic configuration of an information recording / reproducing apparatus according to another embodiment of the present invention. The same block as that of the information recording / reproducing apparatus according to one embodiment of the present invention shown in FIG. The same reference numerals are given to them.

An information writing / reading device 20 according to another embodiment of the present invention is different from the information writing / reading device 20 according to the embodiment shown in FIG. 2 in that control is performed instead of the control unit 28 in FIG. The point is that the section 29 is provided. This control unit 29
The basic configuration is the same as that of the control unit 28, but the operation is different. That is, the control unit 29 determines, based on the information D3 indicating the storage order of the data transmitted from the terminal device 10,
Although the information is read from the buffer memories 26a and 26b and transferred, the control unit 29 is different in that the information stored in the buffer memory 26b and the information stored in the buffer memory 26a are read alternately and transferred in the order of reading. . That is, the control unit 29 alternately transfers information read from the lower surface of the recording medium 30 and information read from the upper surface of the recording medium 30.

In FIG. 4, reference numeral 40 denotes the terminal device 1.
0 is the same terminal device. The terminal device 40 includes a storage device 42 for storing information indicating a storage order of information recorded on the recording medium 30, a memory 46 for storing information transferred from the information writing / reading device 20, CPU (Central Processing Unit) 4 for processing stored information
And 4.

The storage device 42 is realized by, for example, a semiconductor memory or the like. In the example illustrated in FIG. 4, “11234311” is stored in the storage device 42 as information indicating the storage order of the information recorded on the recording medium 30. The terminal device 40 includes an external storage device such as a floppy disk, and writes information indicating the storage order of information stored in the storage device 42 and stored in the storage medium 30 to these external storage devices. May be saved. Alternatively, information indicating the storage order of the information recorded on the recording medium 30 stored in the external storage device may be read and stored in the storage device 42.

Next, the operation of the information recording / reproducing apparatus according to another embodiment of the present invention will be described. First, the terminal device 4
When the read data of the recording medium 30 is transferred from 0, the control unit 29 receives the data and instructs the head control unit 22 to read the information recorded at a predetermined position of the recording medium 30. The data transferred from the terminal device 10 is control data for specifying information to be read.

The head control unit 22 reads information from the recording medium 30 according to an instruction from the control unit 29. In FIG. 4, information denoted by reference symbol D1 indicates information read from the upper surface of the recording medium 30 by the head 24a, and information denoted by reference symbol D2 indicates information read by the head 24b.
0 indicates the information read from the lower surface of 0. Head 24a,
The information read by 24b is sequentially stored in buffer memories 26a and 26b, respectively.

When all the information for which the reading instruction has been issued from the terminal device 40 has been read, or when the memory buffer 26
When the remaining amounts of the data a and 26b are exhausted, the control unit 29 alternately reads the information stored in the buffer memories 26a and 26b one block at a time, and sequentially transfers the read data to the terminal device 40. In the information recording / reproducing device according to the embodiment described with reference to FIG. 3, the information D4 transferred from the information writing / reading device 20 to the terminal device 10 is arranged in a correct order. Are not in the correct order, as indicated by the symbol D5.

When information is transferred from the information writing / reading device 20, the terminal device 40 stores the transferred information in the memory 46. Next, C provided in the terminal device 40
The PU 44 performs a process of rearranging the order of the information stored in the memory 46 based on the information stored in the storage device 42 and indicating the storage order of the information recorded in the recording medium 30.

The information transferred from the information writing / reading device 20 is such that information read from the lower surface of the recording medium 30 and information read from the upper surface are alternately arranged. Rearrange the information transferred to. First, the transferred information D5 is “1235
The information indicating the storage order of the information recorded on the recording medium 30 is “11234311”. Of the transferred information D5, odd-numbered information is information read from the lower surface of the recording medium 30, and even-numbered information is information read from the lower surface of the recording medium 30.

First, the head of the information indicating the storage order of the information recorded on the recording medium 30 is "1", and this information indicates that only one block is written on the lower surface of the recording medium 30. Therefore, the information of the first block of the transferred information D5 is arranged at the head of the information indicated by the reference symbol D6. By this processing, the code D6
The content of the information D6 indicated by "" is "1". The information next to the information indicating the storage order of the information recorded on the recording medium 30 is “1”.
Since the information indicates that the information is written on the surface of 0, the information of one block located at the second position of the transferred information D5 is added to the information indicated by the reference symbol D6. By this processing, the content of the information D6 indicated by the reference numeral D6 becomes "12".

The information next to the information indicating the storage order of the information recorded on the recording medium 30 is "2", and this information indicates the information written on the lower surface of the recording medium 30 continuously for two blocks. Therefore, the information of the third block located in the third place of the transferred information D5 and the information two blocks ahead of this block, that is, the information of the fifth block located with the code D6 are added to the information. Add. By this processing, the content of the information D6 indicated by the reference numeral D6 becomes "1234". The information next to the information indicating the storage order of the information recorded on the recording medium 30 is "3", and this information indicates that the information is written on the surface of the recording medium 30 continuously for three blocks. The information of one block located at the fourth position, the information of one block located at the sixth position, and the information of one block located at the eighth position of the transferred information D5 are indicated by reference symbols D6. To the information. As a result of this processing, the content of the information D6 indicated by the reference numeral D6 becomes “1234567”.

Similarly, the CPU 44 rearranges the information stored in the terminal device memory 46 according to the information D3 indicating the storage order stored in the storage device 42. When this process is completed, the reference symbol D in FIG.
The information is rearranged in the correct order like the information indicated by "6". In this way, the control unit 28 transfers the information recorded on the recording medium 30 to the terminal device 10 according to the information D3 indicating the storage order of the data transferred from the terminal device 10, The information to be transferred is arranged in a correct order like the information denoted by reference numeral D4 in FIG. In the present embodiment, the same data protection function can be realized even if the control unit 29 does not have the function of converting the transmission order as shown in one embodiment.

In the information recording / reproducing apparatus according to the embodiment of the present invention described above, the case where data is read from the recording medium 30 has been described.
It can be recorded at zero or it can be. In this case, the terminal device 10 in FIG. 2 generates information indicating the data storage order, and transfers the generated information and the information to be recorded to the information writing / reading device 20. The control unit 28 controls the head control unit 22 so that the information is recorded on the upper surface and the lower surface of the recording medium 30 according to the information indicating the data storage order.

[0038]

As described above, according to the present invention, it is possible to prevent duplication of information recorded on an information recording medium such as a compact disk, and to prevent a third party of information recorded on these recording media from being copied. Can be prevented from leaking.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a recording medium on or from which information is written or read by an information recording / reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of an information recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 3 is a diagram for explaining an operation during data transfer of the information recording / reproducing apparatus according to one embodiment of the present invention.

FIG. 4 is a block diagram showing a schematic configuration of an information recording / reproducing apparatus according to another embodiment of the present invention.

[Explanation of symbols]

24a, 24b Head (reading unit, recording unit) 28 Control unit (rearrangement unit, transmission unit) 29 Control unit (output unit) 10 Terminal device (instruction unit, generation unit, transfer unit) 42 Storage unit (storage unit) 44 CPU (rearrangement means, processing means)

Claims (7)

[Claims] A reading unit that reads information recorded on both sides of a recording medium; and a rearranging unit that rearranges the information read by the reading unit in accordance with order information indicating a recording order on the recording medium. An information recording / reproducing apparatus characterized by the above-mentioned. 2. The recording / reproducing apparatus according to claim 1, further comprising instruction means for instructing reading of information recorded on the recording medium, wherein the order information is transmitted from the instruction means. 3. The information recording / reproducing apparatus according to claim 2, wherein the rearranging unit transmits the rearranged information to the instruction unit to the instruction unit. 4. A reading means for reading information recorded on both sides of a recording medium, and information read from the lower surface and information read from the upper surface of the recording medium are alternately transmitted for the information read by the reading means. An information recording / reproducing apparatus, comprising: a transmitting unit that performs a process of rearranging the divisions transmitted from the transmitting unit in accordance with order information indicating a recording order on the recording medium. 5. A reading means for reading information recorded on both sides of a recording medium, and for information read by said reading means, information read from a lower surface of the recording medium and information read from an upper surface of the recording medium are alternately transmitted. An information recording / reproducing apparatus comprising: an output unit for performing a process of rearranging the division transmitted from the output unit in accordance with order information indicating a recording order on the recording medium. 6. The information recording / reproducing apparatus according to claim 5, further comprising storage means for storing the order information. 7. A generating means for generating order information indicating an order of recording information on the upper surface or the lower surface of the recording medium; a transferring means for transferring the order information and information for recording on the recording medium; Recording means for recording the information transferred to the upper or lower surface of the recording medium based on the received order information.