JP3537683B2 - Recording / playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus in which EMI information is added to AV data.

[0002]

2. Description of the Related Art The demand for home multimedia systems and home networks is rapidly increasing due to the wave of digitization. In offices and business systems, there is a growing need for digitalization and multimedia than home systems. In this situation, IEEE 1394 has attracted attention in recent years.
-1995. This was IEEE in 1995,
This is a high-speed serial bus standard that is standardized around the physical layer and the link layer, and is 100 Mbps and 200 Mbps.
Hardware and software standards for ps and 400 Mbps data transfer. IEEE13
94 has a characteristic function for plug and play and multimedia data transfer. That is, it has an isochronous data transfer (Isochronous) that secures a band for transferring data such as video and audio and enables real-time transfer. IEEE13
From the control program of the PC connected by the 94 bus to the IEEE
Control of video data (switching of video data, control of camera) of a digital camera or the like can be simultaneously performed by an E1394 control command (asynchronous (asynchronous) data).

[0003] Such a standard, IEEE1394-
When recording digital AV data flowing in 1995 on a recording / reproducing apparatus, it is determined whether or not the AV data can be copied by a conventional CGMS embedded in a stream.
(Copy Generation information
ion).

[0004] The CGMS exists inside a transport stream sent from a broadcasting station. CGMS is 2-bit data. The possible values of CGMS and their meanings are as follows.

That is, when CGMS = 11, copy
Never means copy when CGMS = 10
one generatioin, CGMS =
00 means copy free. Also CGM
S = 01 does not exist. However, copy never means that copying is prohibited, and only viewing of the AV data is permitted. copy one genarato
The “ion” permits copying for only one generation, and the copied AV data can be viewed repeatedly over and over. The copy free indicates that the copy may be freely made.

D for recording and reproducing a DV stream among digital AV data flowing through IEEE 1394-1995
The VC has a DV stream decoder, extracts CGMS from a predetermined position in the stream, and determines whether copying is possible. If CGMS = 11, the AV data is not recorded. DVHS, HD for recording and reproducing MPEG2 transport streams
In a device such as D or DVD-RAM, which does not have a decoder inside and only records and reproduces data, and decodes AV data to an external decoder, a transport stream decoder circuit or the like is required to detect CGMS. Is required, and the hardware configuration becomes complicated.

[0007] In particular, in a digital broadcast stream using an MPEG2 transport stream, the place where the CGMS is embedded differs depending on the service provider, and is often not disclosed. Therefore, there is a case where CGMS cannot be detected even if the transport stream decoder circuit is provided.

On the other hand, by adding signal information (hereinafter referred to as EMI) for transmitting license information to the header of IEEE 1394 packet data, hardware such as a transport stream decoder circuit becomes unnecessary.

EMI takes the following values: That is, EMI =
11 means copy never, EMI = 1
When it is 0, it means copy one generation, and when EMI = 00, it means copy free. Also, EMI = 01 means no more copy. However, copy never means that copying is prohibited, and only viewing of the AV data is permitted. The copy one generation allows only one generation to be copied, and the copied AV data can be viewed repeatedly as many times as necessary.
The copy free indicates that the copy may be freely made. Also, no more copy is copy
This indicates that the AV data is a copy of the one generation AV data, and any further copy indicates non-permission.

[0010] Such EMI is used in IEEE 1394 to specify a cryptographic method and an authentication method. For example, in the copy free of EMI = 00, AV
No encryption is performed when sending data. EMI = 1
0 copy one generation and EMI
EMI = 11 in the no more copy of = 01
And the method of authentication of the key and the device used for encryption are different from those of the copy never.

[0011]

Conventionally, IEEE 13
The EMI added to the header of the 94 packet data is A
When the V data was output to the inside of the recording device, it was removed together with the header of the packet data. For this reason, since EMI is not recorded on the recording device, when outputting the AV data, there is a problem that what is the license of the AV data and what key or authentication method to use cannot be determined. .

Further, even if the EMI is recorded on the recording medium by any method, there is a problem that the user can falsify the recorded EMI and change the license condition.

According to the present invention, when EMI is removed from a recording / reproducing apparatus without recording it, there is a problem that a license of AV data is not known at the time of reproducing and which encoding is not used. In consideration of the problem that the user easily falsifies the EMI when recording is performed, the EMI is recorded at the time of recording, and the recorded EMI is not easily falsified by the user and the AV data cannot be used illegally. It is an object of the present invention to provide a recording and reproducing device.

[0014]

To solve the problems described above SUMMARY OF THE INVENTION, the first of the onset bright, signal information for indicating use permission information of the AV data (hereinafter referred to as EMI) IEEE1
IEEE1 provided in the header of the packet according to 394
Input means for receiving packet data based on 394;
It has a public key authentication means and a common key authentication means.
And, a recording and reproducing means for recording and reproducing the AV data held in said received packet data was said EMI by said input means, said recording and reproducing means, first generation
Copy only generator (copy one generator)
When recording AV data representing n), the EMI is
The above duplication represents no more copy
The recording and reproducing means rewrites the information into
If authentication is successful with an open key authentication method, all
License information, that is, copy prohibition (copy ne
ver) Only one generation is allowed to be copied (copy one)
generation), further copying is prohibited (no
more copy and copy free (copy f)
3) AV data having the license information of IEEE
394, and is authenticated by the common key type authentication means.
Succeeds, further duplication is prohibited (no mo
re copy) and copy free
e) Only the AV data having the license information of IEEE
394, a recording / reproducing apparatus.
You. Further, according to a second aspect of the present invention, there is provided AV data license information.
Signal information (EMI) for indicating
IEEE 1394 that is included in the header of the packet
Input means for receiving packet data based on the input;
Held in the packet data received by the means
Recording / reproducing means for recording / reproducing AV data and the EMI
A by changing the encryption, modulation or recording format
Recording encryption means for encrypting V data,
If the AV data indicates that copying is not free, the recording
The reproducing means, when recording the AV data,
The AV data encrypted by the encryption means is recorded, and
When recording, the recording encryption means responds to the EMI value at the time of recording.
AV data so that the type of encryption and / or the key are different.
Recording and reproducing apparatus for encrypting data.
You. Further, the third aspect of the present invention relates to AV data use permission information.
Signal information (EMI) for indicating
IEEE 1394 that is included in the header of the packet
Input means for receiving packet data based on the input;
Held in the packet data received by the means
Recording / reproducing means for recording / reproducing AV data and the EMI
Wherein the recording / reproducing means transmits the AV data.
If the authentication with the device to be issued is successful,
User access and authentication succeeds
If not, EM will be
A recording / reproducing apparatus for recording I. Ma
Further, the fourth aspect of the present invention indicates the license information of AV data.
Signal information (EMI) for
Based on IEEE1394 provided in the header of the packet
Input means for receiving packet data; and
The AV data held in the received packet data
Recording and reproducing means for recording and reproducing data and the EMI.
The recording / reproducing means records the AV data.
At this time, the EMI is recorded in an area accessible by the user,
User access for the user to access the EMI
Restricts the execution of commands and allows the user to access the EMI.
Recording and playback device
is there. According to a fifth aspect of the present invention, the recording and reproducing means is
If authentication with the device sending the AV data is successful
The execution of the user access command is permitted,
Provide users with access to EMI, and
If authentication with the device sending the data is not successful,
Note that execution of the user access command is not allowed.
It is a recording / reproducing apparatus according to a fourth aspect of the present invention. Also,
The present invention according to No. 6 is a system for indicating license information of AV data.
Signal information (EMI) is transmitted by IEEE1394 packet
Packet based on IEEE 1394
Input means for receiving data received by the input means;
AV data held in the packet data
Recording / reproducing means for recording / reproducing the EMI.
The recording / reproducing means, when reproducing the AV data,
When EMI indicates that the AV data is not copy free
In that case, the AV data is encrypted and output.
Recording and reproducing device. Further, the seventh invention provides an AV
Signal information (EMI) for indicating data usage permission information
In the header of the packet according to IEEE1394
Receives packet data based on IEEE1394
Input means; and the packet data received by the input means.
Record the AV data held in the data and the EMI
Recording and reproducing means for reproducing, the recording and reproducing means,
When reproducing the AV data, the EMI causes the AV data to be reproduced.
Indicates that the data is not free to be copied, and
If the authentication has not been successful yet, output the AV data
Do not output invalid data, and the EMI
V data is not free to be copied and
If authentication with the device is successful, the AV data is output.
A recording / reproducing apparatus characterized in that:

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) First, a first embodiment will be described.

In the present embodiment, a hard disk device is taken as an example of a recording / reproducing device, EMI is recorded in an area inaccessible to a user, and when EMI is not 00 at the time of recording, AV data is re-encrypted for recording and recorded. If the EMI is not 00 at the time of reproduction, the AV data is encrypted and output. If the EMI is 10 at the time of recording, it is rewritten to 01 and recorded. If the EMI is 11 at the time of recording, it is not recorded.
And AV data are stored in separate areas.

FIG. 1 shows a basic configuration diagram of the hard disk drive of the present embodiment.

The hard disk device comprises a digital I / F unit 1, a stream control unit 2, an LBA access unit 3, a hard disk control unit 4, an actuator unit 5, a disk medium 6, a head 7, and a spindle motor unit 8.

The digital I / F means 1 has an STB (Set)
Top Box; satellite broadcast receiver), TV monitor,
This is a means for connecting external AV devices such as a DVHS and a hard disk device to control the AV devices and transfer AV data. For example, an IEEE standard for Hi described in IEEE 1394-1995.
gh performance Serial Bus
It is. The transfer of AV data by the digital I / F means 1
Transfer is performed by a transfer method called an isochronous method, and transfer processing can be performed while guaranteeing real-time properties of data to be transferred. The data to be transferred includes, for example, an MPEG2 transport stream and a DV stream. The control of the AV equipment of the digital I / F means 1 is performed asynchronously (As
The transfer is performed by an asynchronous transfer method called an "ynchronous" method. The stream control means 2 is a means for performing stream access and authentication processing. The LBA access means 3 is an LBA (logical block).
address) to access the disk medium 6 by designating an address. The hard disk control unit 4 is a unit that controls the actuator unit 5 and the spindle motor unit 8 and performs signal processing for recording and reproducing data on and from the disk medium 6 via the head 7. The head 7 is means for recording and reproducing a signal on and from the disk medium 6. The spindle motor means 8 is means for rotating the disk medium at a constant speed. Actuator means 5
Is a means for positioning the head 7 at a target position on the disk medium 6.

In this embodiment, C is used as the license information.
EMI (Encryption) generated from GMS
Mode Indicator)
I will be described.

First, the data transfer protocol of the IEEE 1394 will be briefly described. When watching AV data on a monitor, it is necessary to transmit the data periodically and synchronously. When controlling the stop of a hard disk device or the start of recording, a control command is asynchronously transmitted at an arbitrary timing. Must be able to send and receive. In IEEE1394, the former data includes isochronous packet data, and the latter data includes asynchronous packet data.

In the data transfer, a bus use right is requested to the management node prior to the transfer, and a use license is obtained.

In the asynchronous transfer, the transmitting node ID
And the receiving node ID are transmitted as packet data together with the transfer data. When the receiving node confirms its own ID and receives the packet, it returns an acknowledge signal to the transmitting node. This ends one transaction.

In the isochronous transfer, the transmitting node requests an isochronous channel together with the transmission speed. The channel ID is sent as packet data together with the transfer data. The receiving node confirms the channel ID desired by itself and receives the packet.

The above has briefly described the IEEE 1394 data transfer protocol.

Now, return to the description of EMI. CGMS is
It is added to the AV data at the broadcasting station. The STB that has received the broadcast wave transmitted from the broadcast station outputs the received program to the IEEE 1394 bus. At this time, the CGMS is embedded in the service information part of the MPEG2 transport stream of the isochronous packet data. A plurality of MPEG2 data are stored in one isochronous packet data, and a corresponding CGMS exists for each MPEG2 data.

The EMI is generated by the STB from such a CGMS. The STB checks the CGMS of each piece of AV data transmitted in one isochronous packet data, and assigns one EMI to one isochronous packet data as a representative value. The EMI is held in the header portion of the isochronous packet data.

The value taken by EMI is the CGMS value of the AV data existing in one isochronous packet data.
Among them, the value of the CGMS with the strictest restrictions on the license conditions is taken. For example, if the CGMS of AV data in one isochronous packet data is 11, 10, or 10, the EMI value is 11 which is the strictest. When CGMS is 10, 10, 00, and 00, the value of EMI is 10, which is the strictest among them. Thus, the value of EMI is determined.

The EMI has been described above.

Returning to FIG. 1, the stream control means 2 of the hard disk device is configured as shown in FIG. That is, the stream control means 2
Detecting means 21, EMI adding means 22, EMI access /
It comprises rewriting means 23, EMI determination means 24, authentication / encryption means 25, recording encryption means 26, data block access means 27, file access means 28, and stream access means 29.

The EMI detecting means 21 is a means for detecting a field describing EMI from a header part in the isochronous packet data input from the digital I / F means 1. The EMI adding unit 22 is a unit that adds the specified EMI to the header portion in the isochronous packet data output to the digital I / F unit 1. E
The MI access / rewriting means 23 is means for recording the detected EMI information on the disk medium 6 via the LBA access means 3. At this time, the EMI is copiedone
The generation is a means of rewriting and recording the data into no more copy. Further, the EMI access / rewrite means 23 determines whether the EMI of the input signal from the digital I / F means 1 is a copy never or a no more.
This is a means for preventing recording in the case of copy, and for recording and reproducing the read EMI information corresponding to the designated data block. The EMI determination means 24
This is a means for judging the presence or absence and type of use license from the I information. The authentication / encryption unit 25 performs authentication between the AV devices via the digital I / F unit 1, decrypts the encrypted AV data input from the digital I / F unit 1, This is means for encrypting the AV data read from the side via the data block access means 27. The authentication / encryption means 25 will be described later. The recording encryption means 26 is means for encrypting the decrypted AV data for recording. Recording encryption means 2
6 will be described later. Data block access means 2
Numeral 7 is means for recording or reproducing data of the designated block number via the LBA access means 3 and for notifying the EMI access / rewrite means 24 which block number is currently being accessed. The stream access means 29 designates a block number to be recorded or reproduced in the data block access means 27 in order to execute a command of the access method 2 received from the digital I / F means 1, and also specifies a user area of the disk medium 6. From the first data block to the last data block, think of it as a single tape and follow the instructions for playback, recording, stop, etc.
This is a unit that performs stream pointer management indicating which block position the stream is currently in, and records or reads stream pointer management information to / from the disk medium 6 via the LBA access unit 3. Here, the access method 2 is, for example, AV / C Digit.
al Interface Command SetV
CR subunit Specification
This is a method based on version 2.0.1. The file access means 28 designates a block number to be recorded or reproduced in the data block access means 27 in order to execute a command of the access method 3 received from the digital I / F means 1, and has file management information;
A file pointer that manages a file name and an order configuration of a plurality of data blocks constituting the file, and indicates a current block position in the file according to an instruction such as reproduction, recording, or stop according to an access method 3 command. And manages the order configuration information of the data blocks of these files, file pointer information, etc.
This is a unit that performs recording or reading on the disk medium 6 via the access unit 3. Here, the access method 3 is, for example, AV / C Digital Intele.
rface Command Set General
This is an access method that controls the AV apparatus by instructing a file name and processing contents, reproduction, recording, stop, and the like for the file in accordance with the specification.

The authentication / encryption means 25 shown in FIG. 3 is configured as shown in FIG. That is, the decryption means 30, the authentication means 3
1, key generation means 32, encryption means 33, changeover switch 3
4. It is composed of a changeover switch 35.

The authentication means 31 mutually authenticates the AV devices connecting the digital I / F means 1 and, if the authentication is successful, if the user wants to output AV data to the digital I / F means 1 When the key used for encryption is given to the other party and AV data is to be input from the digital I / F means 1, the other party receives a key to be used for decryption from the other party. The encryption unit 33 reads the A read from the disk medium 6 via the data block access unit 27.
This is a means for encrypting V data using the key generated by the key generation means 31 and outputting it to the digital I / F means 1. The key generation unit 32 is a unit that generates a key used for encryption and passes it to the encryption unit 33 and the authentication unit 31.
The decryption means 30 is means for decrypting the encrypted AV data input from the digital I / F means 1 using the key obtained by the authentication means 31 and outputting the decrypted AV data to the data block access means 27. When the EMI is 00 for the determination result of the EMI determination unit 24, the switches 34 and 35
The input / output data is switched so as not to pass through the encryption unit 33 and the decryption unit 30. When the EMI is other than 00,
The input / output data is switched so as to pass through the encryption unit 33 and the decryption unit 30.

The recording encryption means 26 is configured as shown in FIG. That is, the recording encryption unit 26 includes a key generation unit 36, a decryption unit A37, an encryption selection unit 39, an encryption unit A40, a changeover switch 41, and a changeover switch 42.
Consists of

The encryption selection means 39 is a means for switching between encryption and decryption methods according to the EMI value corresponding to the portion of the AV data to be recorded or reproduced. For example, if EMI is copy one genera
At the time of the tion, the encryption means A40 is used at the time of recording,
At the time of reproduction, the decoding means A37 is used. Also, when the EMI is no more copy, the decoding means 37 is used at the time of reproduction. When the EMI is in a copy free state, the AV data is prevented from passing through the encryption unit 40 and the decryption unit A37. The changeover switches 41 and 42 are means for switching to the encryption and decryption method determined by the encryption selection means 39. The key generation means 36 generates a key used for encryption / decryption according to the EMI value corresponding to the data portion to be recorded or reproduced, and passes it to the decryption means A37 and the encryption means A40. Means. The encrypting means A40 is configured such that EMI is copy one.
Authentication / encryption means 25 in the case of generation
Is a means for encrypting the AV data sent from the server and passing it to the data block access means 27. Decoding means A3
7 is EMI is no more copy or copy
In the case of one generation, the AV data is received from the data block
This is a means for decrypting V data and passing it to the authentication / encryption means 25.

Next, the operation of this embodiment will be described.

A case where an STB is used as a device from which AV data is transmitted will be described. In addition, there is a controller that sends a program reception command, a recording start command, a recording stop command, and the like to a device connected by the IEEE 1394 bus. Therefore, the description is omitted in the present embodiment.

First, it is assumed that the controller sends a reception start command for starting reception of a program sent from a broadcasting station to the STB and sends a recording start command to the hard disk device. A sent from a device other than the STB, for example, a recording / reproducing device such as a DVHS or a hard disk device.
The case of receiving V data will be described later. Then, the program sent from the broadcasting station is received by the STB, and the EM
After being given I, it is sent to the IEEE 1394 bus as isochronous packet data. In addition, the hard disk device is connected to the digital I / F unit 1 by the access method 2
Alternatively, when receiving the recording start command by the command of the access method 3, the digital I / F unit 1 checks the channel number desired by itself and fetches the corresponding isochronous packet data. Now, it is assumed that a recording start command is received as a command of the access method 2. Then, the authentication means 31 sends an authentication command to the STB. The EMI detecting means 21 detects EMI information held in a header portion of the captured isochronous packet data. The EMI determination unit 24 determines the presence or absence of the license and the type of the license based on the detected EMI information. The result is
Input to the encryption means 25, the authentication means 31 determines an authentication method according to the presence or absence of the use license and its type. When EMI is 11, that is, when the copy is never, A
Since the importance of the V data is high, authentication using a public key is performed.
However, when recording from the STB to the hard disk, since the hard disk is a recording device that does not have the function of authentication using a public key for copy never, the authentication unit 31 receives the result of the EMI determination unit 24 and fails in authentication.
Selection of an authentication method by EMI in this manner will be described later. When EMI is 10, ie, co
In the case of the py one generation, the importance of the AV data is not higher than the case where the EMI is 11, so that the authentication is performed using the common key. When the EMI is 00, that is, when it is copyfree, the AV data is not important, so that the authentication is not performed and the authentication is regarded as successful. Upon receiving the authentication command, the STB performs authentication using a common key with the hard disk device, and passes the key to the hard disk device when the authentication is successful. The authentication means 31 receives the key sent from the STB via the digital I / F means 1 and passes it to the decryption means 30. However, when the EMI is 00, the authentication means 31 does not receive the key from the STB. In this case, the AV data itself is not encrypted. When the EMI is 10, the decoding means 30
The key is received from the authentication unit 31.

Now, it is assumed that a recording command is received via the digital I / F means 1 as an access method 2 command. Changeover switch 3 via digital I / F means 1
4 switches the AV data to pass through the decoding means 30 when the EMI of the transmitted AV data is not 00. When the EMI is 00, the switch 34 switches the AV data so as not to pass through the decoding unit 30. Then, the decrypting means 30 decrypts the encrypted AV data using the received key. The stream access unit 29 instructs the data block access unit 27 to record the block x. The data block access unit 27 notifies the EMI access / rewrite unit 23 of the block number (= x) currently being accessed. EM
The I access / rewrite means 23 records the EMI information detected by the EMI detection means 21 in association with the notified block number. However, if EMI is 10, ie, copy
In the case of one generation, EMI is set to 01, that is, n when recording EMI information on the disk medium 6.
o Rewrite to more copy and record. cop
no generation of EMI
The significance of rewriting to “ore copy” will be described later. Further, the AV transmitted through the authentication / encryption unit 25
The data encryption means 26 re-encrypts the data. That is, in response to the result of the EMI determination unit 24, the encryption selection unit 39 determines the presence or absence of encryption based on the EMI value.
That is, when the EMI is 00, ie, copy free, the encryption selection unit 39 switches the changeover switch 42 so as not to pass through the encryption unit A40. Also EMI
If is not 00, the encryption selection means 39 switches the changeover switch 42 so as to pass through the encryption means A40. In this way, if the EMI of the recorded AV data is 00, it is not encrypted, and if the EMI is not 00, it is re-encrypted. The AV data that has passed through the recording encryption unit 26 is passed to the data block access unit 27, and passed through the LBA access unit 3 to the disk medium 6.
Recorded in. Next, the stream access means 29 increases the number of the currently accessed block by one in order to update the stream pointer management information. That is, x = x +
Set to 1. Next, the stream access unit 29 determines whether another command has been received from the digital I / F unit 1. If another command has been received, the process ends. Otherwise, the process after receiving the recording command is repeated until another command is received. The above is the case where the AV data is recorded on the disk medium 6.

Next, a case where the hard disk device reproduces AV data will be described. Consider a case where AV data is reproduced on a television monitor. Further, it is assumed that the AV data recorded on the hard disk device is recorded from the STB. In addition, there is a controller that sends a playback start command, a playback stop command, and the like to a device connected by the IEEE 1394 bus. Therefore, the description is omitted in the present embodiment.

First, the controller sends a reproduction start command to the television monitor, and also sends a reproduction start command to the hard disk device. Then, in the hard disk device, the data block access unit 27 notifies the EMI access / rewrite unit 23 of the access location. EMI access /
The rewriting unit 23 extracts the EMI information of the notified access location, and passes the EMI information to the EMI adding unit 22.
The data block access unit 27 reproduces the AV data via the LBA access unit 3, decrypts the AV data using the recording encryption unit 26, and passes the AV data to the EMI provision unit 22 via the authentication / encryption unit 25. EMI provision means 22
Sends the AV data and EMI as a pair via the digital I / F means 1 to the IEEE 1394 bus as isochronous packet data. The television monitor sends an authentication command to the hard disk device. Further, the television monitor captures the isochronous packet data sent from the hard disk device, and determines the authentication method by referring to the EMI information attached thereto. EMI
Is 01, that is, no more copy, the authentication unit 31 authenticates with the television monitor via the digital I / F unit 1 using a common key. If the EMI is 00, no authentication is performed, and it is considered that the authentication is successful. Since the present embodiment deals with the case where the recorded AV data sent from the STB is reproduced, all the AV data with EMI of 10, that is, copy one generation, are recorded with EMI rewritten to 01. . When the hard disk device receives the authentication command via the digital I / F unit 1, the authentication unit 31 sets the EMI
With reference to the information, the type of authentication is determined, and authentication is performed with the television monitor. If the authentication is successful, the authentication unit 31 passes the key generated by the key generation unit 32 to the encryption unit 33. E
When the MI is 00, the key is not passed to the encryption unit 33, and the changeover switch 35 is switched to a side not passing through the encryption unit 33. If the EMI is not 00, the changeover switch 35 is switched to the side via the encryption means 33.

It is assumed that the hard disk device has received a reproduction command from the digital I / F unit 1 in accordance with the access method 2 command. The stream access unit 29 instructs the data block access unit 27 to reproduce the block x. The data block access unit 27 notifies the EMI access / switching unit 23 of the block number (= x) currently being accessed. At the same time, the data block access means 27 reads AV data from the disk medium 6 via the LBA access means 3. The EMI access / switching unit 23 reads EMI information corresponding to the notified block number from the disk medium 6. EMI read
The information is determined by the EMI determination unit 24, and the determination result is sent to the recording encryption unit 26 and the authentication / encryption unit 25. The AV data read by the data block access means 27 is passed to the recording encryption means 26.

If the EMI is determined to be 00 in the EMI determination result, the changeover switch 35 of the authentication / encryption unit 25 is switched to the encryption unit 3
3, the recording encryption means 2
The changeover switch 41 of No. 6 switches to a side not passing through the decoding means A37. Therefore, the AV data is output without being encrypted. If EMI is not 00, the changeover switch 35 is switched to the side via the encryption means 33. When EMI is not 00, the changeover switch 41 is set to EM
In response to an instruction from the encryption selection unit 39 based on the value of I, the mode is switched to the decryption unit A37. The AV data that has been plaintext by the recording encryption unit 26 is encrypted by the encryption unit 33 and output through the digital I / F unit 1.

Next, the stream access means 29 updates the stream pointer management information and increases the number of the currently accessed block by one. That is, x = x + 1. Next, the stream access means 29 is a digital I / F
It is determined whether another command has been received from the means 1. If another command has been received, the process ends. Otherwise, the processing after receiving the reproduction command is repeated until another command is received.

In the present embodiment, the presence / absence of encryption for recording is switched according to the EMI information. Therefore, even if the user falsifies the EMI information and sets the copy free, the encryption for recording can be correctly decrypted. Since it is not possible, the tampering can be invalidated.

As described above, selection of an authentication method by EMI will be described. That is, two types of authentication methods are used. EMI is 11 copy never
The authentication of scheme A is used as the authentication scheme for r. In addition, EMI has 10 copy one generators
A method B authentication is used as an authentication method for a no more copy where n and EMI are 01. More specifically, authentication using a public key can be used as authentication in method A, and authentication using a common key can be used as authentication in method B. A device that does not record AV data, such as a television monitor or STB, supports both method A and method B authentication, and a device that records AV data, such as a VTR, supports only method B authentication. An optical disk device such as a DVD-RAM records CGMS = 11, ie, E, in addition to recording AV data from the STB.
DVD with prerecorded AV data of MI = 11
Since a ROM medium is reproduced, both method A and method B are supported. When the hard disk device of the present invention records AV data sent from the STB, the hard disk device of the present invention supports only the method B authentication, and if the EMI is 11, the authentication fails. Therefore, EM
AV data when I is 11 is not recorded. If the EMI is 10, the authentication is successful and the AV data can be recorded on the hard disk device of the present invention. EMI is 01
In the case of (1), the authentication means 31 does not have the common key for 01, so the authentication fails, or even if the authentication is considered to be successful, the AV data is not recorded based on the EMI value. When reproducing the AV data on the television monitor at the time of reproduction of the hard disk device of the present invention, when the EMI is 01 no more copy, the television monitor
Supports method B authentication, and no more copy
Authentication, the authentication is successful and the AV data can be output to the television monitor. The authentication is successful because the VTR supports scheme B authentication.
EMI is 10 copy one generator
In the case of n, AV data can be recorded on the VTR. If the EMI is no more copy of 01, the authentication is successful, but the VTR has no more copy.
Since the VTR does not have a copy common key,
Judging from the I information, it is determined that the AV data is not recorded or that the authentication has failed. In the case of an optical disk device, a copy never with an EMI of 11 from the STB
When the AV data is transmitted, the authentication of the scheme A and the authentication of the scheme B are supported, so that the authentication is successful. But EMI
Is the copy never, the AV data is not recorded or it is considered that the authentication has failed.
EMI is 10 copy one generator
If the AV data of “in” is sent from the STB, the authentication is successful and the recording can be performed. Nomore c with EMI of 01
When the AV data of optic is sent from STB,
It is assumed that AV data is not recorded or authentication has failed.
When the data is reproduced on a television monitor, the EMI is 01
More copy can be authenticated by the method B and output.
CGMS is 11, ie, EMI is 11
When reproducing a DVD-ROM medium of ver, the data is authenticated by the method A and output. The CGMS still prerecorded on the DVD-ROM medium is 10, that is, the EMI is 10.
When recording the AV data of the “one one generation” in the VCR, authentication is performed using the method B, and the
Output as 0.

As described above, by selecting an authentication method based on the value of EMI, more important AV data can be improved in security by using a more secure authentication method, and less important AV data can be simplified more easily. There is an advantage that the use of authentication does not impose an unnecessary burden on the device.

Next, as described above, at the time of recording,
no generation EMI for no mor
This is rewritten as e copy, and its significance will be described. In FIG. 21, it is assumed that the EMI of the AV data 103 is 10 and the CGMS has the AV data of 10 and 00. It is also assumed that the recorder 1 (104) is a recorder that accesses only EMI when recording and reproducing.
The recorder 2 is assumed to be a recorder that accesses both EMI and CGMS. For further explanation, let's say EMI
Has no concept of no more copy. That is, just like CGMS, copy one
When the generation data is recorded, the E
It is assumed that MI is rewritten to copy never. Then, when the AV data 103 is recorded by the recorder 1 (105), the EMI is rewritten to 11 like the AV data 105. Next, it is assumed that the AV data recorded on the recorder 1 (104) is reproduced on the recorder 2 (106). The recorder 2 (106) performs EMI of the AV data 105.
Go to. Then, since EMI is 11, EM
Since it is known from the information I that copying is prohibited, the CGMS of the AV data 105 is accessed to obtain more detailed information. In the CGMS of the AV data 105, since the data of A is 10 and the data of B is 00, both can be copied. The recorder 2 (106) judges in this way, records both the data of A and the data of B, and
MS is rewritten from 10 to 11, EMI and CGMS are A
It looks like V data 107. Therefore, the AV data 103
The data of A is recorded by the recorder 1 (104) and the recorder 2 (106) despite the fact that the CGMS is 10, and the recording of two or more generations is performed and the license is not protected. .

However, suppose that EMI is rewritten to 01 when recording AV data with EMI of 10. In FIG. 21, the EMI of the AV data 108 is 10 and the CGMS
Has AV data of 10 and 00. It is assumed that the recorder 1 (109) is a recorder that accesses only EMI when recording and reproducing. Recorder 2
(111) is a recorder that accesses both EMI and CGMS. Then, when the AV data 108 is recorded by the recorder 1 (109), the EMI is rewritten to 01 like the AV data 110. Next, recorder 1
The AV data 110 recorded in (109) is the recorder 2
It is assumed that the data is reproduced at (111). Recorder 2 (111)
Accesses the EMI of the AV data 110. Then E
Since the MI is 01, it can be seen that this AV data has already been copied once in the past. Recorder 2
(111) is the AV data 110 for obtaining detailed information.
To access the CGMS. The data of A is CGMS 1
This indicates that the CGMS of the data of B is 00. Therefore, the recorder 2 (111) can copy the data of A once, but does not record the data of A because the EMI is 01 and there is a history recorded once in the past. The data of B is recorded, and EMI is set to 00. Thus, the data of A is not recorded in the recorder 2 (111). In this way, the EMI
By introducing ore copy, the history of whether or not the data was recorded in the past can be known, and the CGMS data of 10 is not recorded twice.

In this embodiment, the access method 2
In the above, the case where the command is executed by the stream access unit 29 has been described. However, the present invention is not limited to this, and the command may be executed by the file access unit 15 using the access method 3.

Further, as described above, a case where AV data sent from a device other than the STB is recorded in the hardware device of the present invention will be described. The AV data sent from the STB has no more
The EMI is no moreco if it is sent from a device other than the STB.
py AV data also exists. Nom with EMI of 01
In the case of the ore copy, the authentication unit 31 determines that the authentication has failed or does not record the AV data and the EMI information on the disk medium 6. Other than that, it is the same as the case of recording the AV data sent from the STB.

Further, the recording encrypting means of the present invention comprises an AV
Regardless of the type of data encryption method. The format may be changed at the time of recording the AV data, or encryption may be performed by modulating the AV data.

Further, a configuration in which the recording encryption means of the present invention is not provided may be employed. That is, a configuration may be employed in which AV data is recorded in plain text when recorded on a disk medium.

Further, the authentication is performed after the device receives the recording start command, but the present invention is not limited to this.
For example, authentication may be performed in advance when the connection is made in step 4 or when a previous program is received.

Further, the meaning of the bits of the recorded EMI has been described as being the same as the transmitted EMI. However, the present invention is not limited to this, and unique bits may be assigned in the recording device.

Next, a format for recording EMI on the disk medium 6 will be described.

FIG. 13 shows a case where EMI is recorded in the system area 60 in block units. In FIG. 13, the disk medium 6 is divided into a system area 60 and a user area 61. The system area 61 is an area used by the system and cannot be accessed by the user. On the other hand, the user area 61 is an area used by the user. It is assumed that the user area 61 is composed of k blocks. An area for recording EMI is provided in a part of the system area 60. The EMI for each block is recorded in this area. Block 1 (62), Block 2
The EMI of (63), block 3 (64), and block k (65) are all 00 when referring to the table stored in the bitmap format. In other words, copy fre
e represents the area of e. However, block k (6
Areas such as 5) are areas that have not been used yet, and unused areas are also set to 00 as EMI information. In addition, since the EMI of the blocks 11, 12, and 13 is 01, no more co
py area. Such EMI information is created and updated by the EMI access / rewriting means 23. Since the EMI information is stored in the system area 60, the user cannot easily falsify the contents of the EMI information and illegally view the AV data. Therefore, the reliability of the hard disk having the functions of the present embodiment is enhanced.

Next, a case where EMI information is managed by an address will be described. In FIG. 14, the disk medium 6 is divided into a system area 66 and a user area 67. The system area 66 is used by the system and cannot be accessed by the user. On the other hand, the user area 67 is an area used by the user. Each time the EMI information changes, the data is divided to define a stream. The EMI information is represented by the EMI of the stream and the start LBA and end LBA of the stream. Stream 1 (68) has a start LBA of a0 and an end LBA of a1, and this stream is EMI
Are copy free. Stream 2 (6
9) is that the start LBA is a1 and the end LBA is a2, and this stream has no more
copy. Stream 3 (70) is the start LB
A is a2, the ending LBA is a3, and the EMI of this stream is all copy free. In the stream n (71), the start LBA is a4 and the end LBA is a5, and the EMI of this stream is all no more copy. Such EMI
The information is created and updated by the EMI access / rewriting means 23. Since the EMI information is stored in the system area 66, the user can easily falsify the contents and illegally execute the AV.
The data cannot be viewed. Therefore, the reliability of the hard disk drive of the present embodiment is enhanced.

Next, a case where EMI information is arranged in pairs with data blocks will be described. In FIG. 15, the disk medium 6 is divided into a system area 72 and a user area 73. The system area 72 is an area that is used by the system and is inaccessible to the user. On the other hand, the user area 73 is an area used by the user. In FIG. 13, the system area is secured as a united area,
In FIG. 15, a system area is reserved for each block. Block 1 (74), Block 2 (7
5), block 3 (76) ..., block k (77)
Are recorded in the system area in pairs. The EMI of block 1 (74) is 00 and c
This indicates that the content is an "opy free". The EMI of block 2 (75) is 01, and no more
copy. Such EMI information is created and updated by the EMI access / rewriting means 23. Since the EMI information is stored in the system area 72, the user can easily falsify the contents so that the AV data cannot be illegally viewed. Therefore, the reliability of the hard disk drive of the present embodiment is enhanced.

The EMI information according to the first embodiment does not necessarily need to be placed in the system area 72 and may be stored in the user area 73. However, a mechanism is required in which the user cannot directly change the EMI information. . This will be specifically described in the fourth embodiment and the fifth embodiment.

The EMI information is transferred to the LBA access means 3
May be recorded in an inaccessible area. In the case of a hard disk, there is a replacement sector area for replacement processing, and EMI information may be recorded in this replacement sector area. In this case, the EMI access / rewrite means 23 directly specifies a physical address such as a cylinder, a head, or a sector of the disk medium 6.

The digital I / F means of the present embodiment is an example of the input means of the present invention, and the EMI of the present embodiment is an example.
The access / rewrite means and the data block access means are examples of the recording / reproducing means of the present invention.

Further, an access means for designating a cylinder, a head, and a sector may be used in place of the LBA access means of the present embodiment. At this time, the EMI information may be recorded anywhere as long as the user cannot make any changes.

(Embodiment 2) Next, a second embodiment will be described.

In the present embodiment, V / V
Taking a CR (Video Cassette Recorder) as an example, EMI is recorded in an area that cannot be accessed by the user, and EM is recorded at the time of recording.
When I is not 00, the AV data is re-encrypted for recording and recorded. When EMI is not 00 during reproduction, the AV data is encrypted and output. When EMI is 10 during recording, 01 is output.
The following describes a case where EMI and AV data are stored in different areas without recording when EMI is 11 at the time of recording.

FIG. 2 shows a basic configuration of the VCR. That is, the VCR is composed of a digital I / F unit 1, a stream control unit 9, a deformatting unit 10, a formatting unit 11, a control unit 12, and a memory access unit 1.
3, a reproducing unit 14, a recording unit 15, a head 16, a recording head 17, a reproducing head 18, a tape medium 19, and a memory 20.

The digital I / F means 1 is a means for connecting external AV devices such as a STB, a television monitor, a DVHS, and a hard disk device, for controlling the AV devices and transferring AV data. Stream control means 9
Is a means for performing stream access and authentication processing. The deformatting means 10 is a means for converting the format of the signal reproduced by the reproducing means 14. The format unit 11 is a unit that converts the format into a signal to be recorded on the tape medium 19 and passes the signal to the recording unit 15. The control means 12 controls the running of the tape, the tracking of the head 16, the reproducing means 14 and the recording means 15
It is a means to control. The memory access unit 13 is a unit for accessing the memory 20 added to the tape medium 19. The reproducing means 14 includes a head 16
Means for processing digitally reproduced data from the reproducing head 18 and outputting digital AV data. Recording means 15
Is a means for processing the AV data from the stream control means 9 and sending a recording signal to the recording head 17 of the head 16. The head 16 is means for recording a signal on the tape medium 19 and reproducing the signal on the tape medium 19. The recording head 17 is provided on the head 16 and is a means for recording a signal on the tape medium 19. Reproduction head 1
Reference numeral 8 denotes a unit provided on the head 16 for reproducing a signal of the tape medium 19. The tape medium 19 is a means for recording signals for recording and reproducing. Memory 20
Is means for recording and reproducing EMI information.

Returning to FIG. 2, the stream control means 9 of the VCR is configured as shown in FIG. That is, the stream control means includes the EMI detection means 21, E
MI adding means 22, EMI access / rewriting means 23, E
It comprises an MI determination unit 24, an authentication / encryption unit 25, a recording encryption unit 26, a format unit 10, a deformat unit 11, a command execution unit 43, and an EMI information management unit 102.

Only the parts different from the first embodiment will be described. The formatting means 10 and the deformatting means 11 have been described above. Command execution means 43
Is a means for executing a command received from the digital I / F means 1, interpreting the processing contents of the command, and instructing the control means 12 to reproduce, record, stop, and the like.
Such commands include, for example, AV / C Digit
al Interface Command Set
VCR subunit Specification
There is a method based on version 2.0.1. The EMI information management unit 102 records the EMI information detected by the EMI detection unit 21 at the time of recording in association with the track number notified from the recording unit 14, and corresponds to the track number notified from the reproduction unit 15 at the time of reproduction. This is a means for reading EMI information.

Next, the operation of this embodiment will be described.

The case of STB as an apparatus from which AV data is sent will be described. In addition, there is a controller that sends a program reception command, a recording start command, a recording stop command, and the like to a device connected by the IEEE 1394 bus. However, describing the exchange of commands between the controller and the VCR and STB is described in this embodiment. The description is omitted in the present embodiment, since it deviates from the gist of the embodiment. Further, the authentication between the STB and the VCR is the same as in the first embodiment, and a description thereof will be omitted.

Now, it is assumed that the command executing means 43 has received a recording command via the digital I / F means 1.
Then, the control means 12 controls the tape medium 19
And instruct the recording means 14 to record. The recording means 14 is a track number (= x) which is currently accessing the EMI access / rewriting means 23 and the EMI information management means 102.
Notify. The EMI access / rewrite means 23
The EMI information detected by the detecting means 21 is rewritten according to the value. That is, EMI is 10 or copy.
no mo of 01 for one generation
Rewrite to re copy. EMI information management means 10
2 records the EMI information in association with the notified track number. Via the digital I / F unit 1, the switch 34 switches the AV data to pass through the decoding unit 30 when the EMI of the transmitted AV data is not 00. Further, the changeover switch 34 is connected to the EMI
Is 00, switching is performed so that the AV data does not pass through the decoding means 30. Then, the decrypting means 30 decrypts the encrypted AV data using the received key. Further, the AV transmitted through the authentication / encryption unit 25
The data encryption means 26 re-encrypts the data. That is, in response to the result of the EMI determination unit 24, the encryption selection unit 39 determines the encryption method based on the EMI value.
That is, when the EMI is 00, ie, copy free, the encryption selection unit 39 switches the changeover switch 42 so as not to pass through the encryption unit A40. Also EMI
If is not 00, the encryption selection means 39 switches the changeover switch 42 so as to pass through the encryption means A40. In this way, if the EMI of the recorded AV data is 00, it is not encrypted, and if the EMI is not 00, it is re-encrypted. The AV data that has passed through the recording encryption unit 26 is passed to the format unit 10, converted in format, and recorded on the tape medium 19 via the recording unit 14. Next, the track number is increased by one. That is, x = x + 1. Next, it is determined whether or not another command is received from the digital I / F unit 1.
If another command has been received, the process ends. Otherwise, the process after receiving the recording command is repeated until another command is received. The above is the case where the AV data is recorded on the VCR.

Next, a case where the VCR reproduces AV data will be described. Consider a case where AV data is reproduced on a television monitor. Further, it is assumed that the AV data recorded on the VCR is recorded from the STB. In addition, IEEE13
There is a controller that sends a playback start command, a playback stop command, and the like to a device connected by a 94 bus. Therefore, the description is omitted in the present embodiment. In addition, the first
Therefore, the description is omitted.

The command execution means 43 has a digital I / F
It is assumed that a reproduction command is received from the means 1. Then, the control means 12 causes the tape medium 19 to run,
The reproduction unit 15 is instructed to reproduce from the tape medium 19.
The reproducing means 15 is provided between the EMI access / rewriting means 23 and the EM
The current track number (= x) is notified to the I information management means 102. The EMI access / rewrite means 23 and the EMI information management means 102 read the EMI information corresponding to the notified track number (= x). After the read EMI information is determined by the EMI determination unit 24, it is sent to the EMI adding unit 22, the authentication / encryption unit 25, and the recording encryption unit 26. The AV data reproduced by the reproducing means 15 and subjected to format conversion by the deformatting means 11
It is sent to the recording encryption means 26.

If the EMI is determined to be 00 in the EMI determination result, the changeover switch 35 of the authentication / encryption unit 25 is switched to the encryption unit 3
3, the recording encryption means 2
The changeover switch 41 of No. 6 switches to a side not passing through the decoding means A37. Therefore, the AV data is output without being encrypted. If EMI is not 00, the changeover switch 35 is switched to the side via the encryption means 33.

If EMI is not 00, the changeover switch 4
1 switches to the decryption unit A37 according to the instruction of the encryption selection unit 39 based on the value of EMI. The AV data that has been plaintext by the recording encryption unit 26 is encrypted by the encryption unit 33, paired with the EMI information by the EMI adding unit 22, and output via the digital I / F unit 1. However, it is assumed that the device to be reproduced at the stage of authentication has been selected in advance. This has been described in the first embodiment.

Next, the block number is incremented by one. That is, x = x + 1. Next, it is determined whether or not another command is received from the digital I / F unit 1. If another command has been received, the process ends. Otherwise, the processing after receiving the reproduction command is repeated until another command is received.

In the present embodiment, as in the first embodiment, the type of recording encryption and the type of key are switched according to the EMI information. Therefore, even if the user falsifies the EMI information,
Correspondence with the encryption for recording cannot be taken, and the data cannot be correctly decrypted. Therefore, the tampering can be invalidated.

Next, a method of recording EMI information will be described.

FIG. 17 shows AV data and EMI information recorded on a tape. The data recording unit 83
The data is recorded, and the EMI information
I information is recorded. However, the EMI information recording unit 8
An area 4 is inaccessible to the user. Therefore, the user cannot alter the license condition by falsifying the EMI information.

FIG. 18 shows another method of recording AV data and EMI information recorded on a tape. AV data is recorded in the data recording unit 86, and EMI is mixed and recorded in the AV data.

FIGS. 19 and 20 show the tape medium 1 respectively.
This is a case where EMI information is recorded in a memory 20 added to the memory 9.

FIG. 19 shows an example in which an EMI recording unit 94 is provided in a part of the memory 20. The EMI recording section 94 records EMI information for each track. Whole tape 8
8 is composed of k tracks. Memory 20
Is provided with an EMI recording unit 94 for recording EMI. The EMI for each block is recorded in this area.
Block 1 (89), Block 2 (90), Block 3
The EMI of (91) and the block k (92) are all 00 when referring to the table stored in the bitmap format. In other words, it represents a copy free area. However, an area such as a block k (65) is an area that has not been used yet, and an unused area is also set to 00 as EMI information. Block 11,
Since the EMI of the blocks 12 and 13 is 01, it is an area of no more copy. Such EMI information is created and updated by the EMI access / rewriting means 23. Since the EMI information is stored in the memory 20, the user cannot easily falsify the contents of the EMI information and illegally view the AV data. Therefore, the reliability of the VCR having the functions of the present embodiment is enhanced.

FIG. 20 shows a case where EMI information is managed by an address. Each time the EMI information changes, the data is divided to define a stream. The EMI information is represented by the EMI of the stream and the start track and end track of the stream. Stream 1 (96) has a start track of a0 and an end track of a1, and this stream has all EMI
py free. In stream 2 (97), the start track is a1 and the end track is a2, and this stream has no more than
y. Stream 3 (98) has a start track a
2, the end track is a3, and the EMI of this stream is all copy free. In the stream n (99), the start track is a4 and the end track is a5, and the EMI of this stream is all no more copy. Such EMI
The information is created and updated by the EMI access / rewriting means 23. Since the EMI information is stored in the memory 20,
It is designed so that the user cannot easily falsify the contents and illegally view the AV data. Therefore, the reliability of the VCR of the present embodiment is enhanced.

Further, the device is authenticated after receiving the recording start command. However, the present invention is not limited to this.
For example, authentication may be performed in advance when the connection is made in step 4 or when a previous program is received.

Furthermore, the meaning of the bits of the EMI to be recorded has been described as being the same as the transmitted EMI. However, the present invention is not limited to this, and unique bits may be assigned in the recording device.

The digital I / F means of the present embodiment is an example of the input means of the present invention, and the EMI of the present embodiment
The access / rewriting means, the EMI information managing means, the formatting means, and the deformatting means are examples of the recording / reproducing means of the present invention.

(Embodiment 3) Next, a third embodiment will be described.

In this embodiment, an optical disk device (for example, DVD-R, DVD-RAM) is taken as an example of a recording / reproducing device, and EMI is recorded in an area that cannot be directly accessed by a user. It is re-encrypted for recording and recorded.
If not, the AV data is encrypted and output.
When the MI is 10, the data is rewritten to 01 and recorded. When the EMI is 11 during recording, the data is not recorded.
When reproducing a disk medium on which 1 or 10 AV data has been previously encrypted for recording and recorded, the encrypted recording data is decrypted, and then encrypted and output.
And AV data are stored in separate areas.

FIG. 22 shows a basic configuration diagram of the optical disk device of the present embodiment. The optical disk device is a digital I / F
It comprises means 1, stream control means 112, LBA access means 3, disk control means 113, actuator means 114, disk medium 116, pickup 115, and spindle motor means 117. The digital I / F unit 1 and the LBA access unit 3 are the same as the basic configuration of the hard disk device described in the first embodiment, and the description is omitted. The configuration of the stream control means is basically the same as that of the first embodiment.
23, except that the recording encryption unit 118 of FIG. 23 is used in place of the recording encryption unit 26. Otherwise, the description is omitted because it is the same. The recording encryption means 118 will be described later.

The disk control means 113 includes an actuator means 114, a spindle motor means 117,
Controls the pickup 115 and also controls the pickup 115
This is a means for performing signal processing for recording and reproducing on the disk medium 116 via the. The spindle motor means 117 rotates the disk medium 116 at a constant linear speed, or rotates the disk medium 116 at a constant rotation speed for each zone.
Alternatively, it is a means for controlling the number of rotations to an appropriate value for performing recording and reproduction on a disk medium by rotating at a constant linear velocity for each zone. Actuator means 114
Is means for positioning the pickup to a target recording / reproducing position on the disk medium. The pickup 115 is a means for controlling the focal length with respect to the disk medium 116 and controlling the tracking, and for performing signal or reproduction with respect to the disk medium.

The recording encrypting means 118 is configured as shown in FIG. That is, the recording encryption means 118
Key generation means 36, decryption means A37, decryption means B3
8, an encryption selection unit 39, an encryption unit A40, a changeover switch 41, and a changeover switch 42.

The encryption selection means 39 is a means for switching the encryption and decryption methods according to the EMI value corresponding to the portion of the AV data to be recorded or reproduced. For example, if EMI is copy one genera
At the time of the tion, the encryption means A40 is used at the time of recording,
At the time of reproduction, the decoding means A37 is used. When EMI is no more copy, decoding means A37 is used at the time of reproduction. EMI is copy never
At the time of reproduction, the decoding means B38 is used at the time of reproduction. Also E
When the MI is copy free, the AV data is prevented from passing through the encryption means 40, the decryption means A37, and the decryption means B38. The changeover switches 41 and 42 are means for switching to the encryption and decryption method determined by the encryption selection means 39. The key generation means 36 generates a key used for encryption / decryption according to the EMI value corresponding to the part of the data to be recorded or reproduced, and outputs the key to the decryption means A37, the decryption means B38, It is a means to be passed to the conversion means A40. The encrypting means A40 uses EMI cop
In the case of y one generation, the AV data transmitted from the authentication / encryption unit 25 is encrypted and passed to the data block access unit 27. The decryption unit A37 receives the AV data from the data block access unit 27 when the EMI is no more copy or copy one generation, decrypts the AV data, and executes the authentication / encryption unit 2
5 means. Decoding means B38 determines that EMI is c
In the case of "opinever", the AV data is received from the data block access unit 27, the AV data is decrypted, and the decrypted AV data is passed to the authentication / encryption unit 25.

Next, the operation of this embodiment will be described.

The case of STB as a device from which AV data is transmitted will be described. In addition, there is a controller that sends a program reception command, a recording start command, a recording stop command, and the like to devices connected by the IEEE 1394 bus. However, the description of the command exchange between the controller, the optical disk device, and the STB is described in this embodiment. Therefore, the description is omitted in the present embodiment.

First, it is assumed that the controller sends a reception start command for starting reception of a program sent from a broadcasting station to the STB and sends a recording start command to the optical disk device. Then the program sent from the broadcasting station will be ST
B, after receiving EMI and sending it to the IEEE 1394 bus as isochronous packet data. When the optical disk device receives a recording start command from the digital I / F unit 1 using an access system 2 or access system 3 command, the digital I / F unit 1 checks the channel number desired by itself, Capture packet data. Now, it is assumed that a recording start command is received as a command of the access method 2. Then, the authentication means 31 sends an authentication command to the STB. The EMI detecting means 21 detects EMI information held in a header portion of the captured isochronous packet data. The EMI determination unit 24 determines the presence or absence of the license and the type of the license based on the detected EMI information. The result is input to the authentication / encryption unit 25, and the authentication unit 31 determines an authentication method according to the presence or absence of the license and the type of the license. When EMI is 11, ie, copy
At the time of “never”, authentication with a public key is performed because the importance of the AV data is high. However, when recording from the STB to the optical disk, the copy never prohibits duplication, so the optical disk does not record data, the optical disk does not perform authentication, or the authentication unit 31 performs the EMI determination unit 2 operation.
In response to the result of 4, the authentication fails. When EMI is 10, ie, copy one generation
In the case of, the importance of the AV data is not higher than when the EMI is 11, so the authentication is performed using the common key. Also EM
When I is 00, that is, when it is copy free, the AV data is not important, so no authentication is performed.
Consider the authentication successful. Upon receiving the authentication command, the STB performs authentication with the optical disk device using the common key, and passes the key to the optical disk device when the authentication is successful. The authentication means 31 is provided via the digital I / F means 1
The key received from the STB is received and decryption means 30
Pass to. However, when the EMI is 00, the authentication means 31 does not receive the key from the STB. In this case, the AV data itself is not encrypted. When the EMI is 10, the decryption unit 30 receives the key from the authentication unit 31.

Now, it is assumed that a recording command is received via the digital I / F means 1 as a command of the access method 2. Changeover switch 3 via digital I / F means 1
4 switches the AV data to pass through the decoding means 30 when the EMI of the transmitted AV data is not 00. When the EMI is 00, the switch 34 switches the AV data so as not to pass through the decoding unit 30. Then, the decrypting means 30 decrypts the encrypted AV data using the received key. The stream access unit 29 instructs the data block access unit 27 to record the block x. The data block access unit 27 notifies the EMI access / rewrite unit 23 of the block number (= x) currently being accessed. EM
The I access / rewrite means 23 records the EMI information detected by the EMI detection means 21 in association with the notified block number. However, if EMI is 10, ie, copy
In the case of one generation, EMI is set to 01, that is, n when recording EMI information on the disk medium 6.
o Rewrite to more copy and record. Further, the recording encryption means 118 re-encrypts the AV data passed through the authentication / encryption means 25. That is, E
Upon receiving the result of the MI determining means 24, the encryption selecting means 39
Determines the presence or absence of encryption according to the value of EMI. That is, when EMI is 00, ie, copy free, the encryption selection unit 39 sets the changeover switch 42 to the encryption unit A.
Switch so as not to go through 40. EMI is 00
If not, the encryption selecting unit 39 sets the changeover switch 42
Is switched to pass through the encryption means A40. In this way, if the EMI of the recorded AV data is 00, it is not encrypted, and if the EMI is not 00, it is re-encrypted. AV via recording encryption means 118
The data is passed to the data block access means 27,
The data is recorded on the disk medium 116 via the LBA access unit 3. Next, the stream access means 29 increases the number of the currently accessed block by one in order to update the stream pointer management information. That is, x = x + 1
And Next, the stream access means 29
It is determined whether another command has been received from the / F means 1. If another command has been received, the process ends.
Otherwise, the process after receiving the recording command is repeated until another command is received. Above is A
This is a case where V data is recorded on the disk medium 6.

Next, a case where the optical disk apparatus reproduces AV data will be described. Consider a case where AV data is reproduced on a television monitor. Further, it is assumed that the AV data recorded on the optical disk device is recorded from the STB. In addition, there is a controller that sends a reproduction start command, a reproduction stop command, and the like to a device connected by the IEEE 1394 bus. However, the description of the command exchange between the controller, the optical disk device, and the television monitor is described in the gist of the present embodiment. Therefore, the description is omitted in the present embodiment. First, the controller sends a reproduction start command to the television monitor, and also sends a reproduction start command to the optical disk device. Then, in the optical disk device, the data block access unit 27 notifies the EMI access / rewrite unit 23 of the access location. The EMI access / rewriting means 23
Extract the EMI information of the notified access location, and
The EMI information is passed to the I providing unit 22. The data block access unit 27 reproduces the AV data via the LBA access unit 3, decrypts the AV data using the recording encryption unit 118, and passes the AV data to the EMI provision unit 22 via the authentication / encryption unit 25. The EMI adding means 22 pairs the AV data and the EMI via the digital I / F means 1,
IEEE 139 as isochronous packet data
Send to 4 bus. The television monitor sends an authentication command to the optical disk device. Further, the television monitor captures the isochronous packet data sent from the optical disk device, and determines an authentication method by referring to the EMI information attached thereto. EMI is 01, that is, no m
In the case of an ore copy, the authentication means 31 uses a digital I / O
Via the F means 1, authentication is performed with the television monitor and the common key. If the EMI is 00, no authentication is performed, and it is considered that the authentication is successful. Since the present embodiment deals with the case where the recorded AV data sent from the STB is reproduced, the EMI is 10 (copy one).
All the generation AV data is recorded with EMI rewritten to 01. When the optical disk device receives the authentication command via the digital I / F unit 1, the authentication unit 31 determines the type of authentication with reference to the EMI information, and performs authentication with the television monitor. If the authentication is successful, the authentication unit 31 passes the key generated by the key generation unit 32 to the encryption unit 33. When the EMI is 00, the key is not passed to the encryption unit 33, and the changeover switch 35 is switched to a side not passing through the encryption unit 33. If the EMI is not 00, the changeover switch 35 is switched to the side via the encryption means 33.

The optical disk device is a digital I / F unit 1
It is assumed that a reproduction command has been received from the PC as an access method 2 command. The stream access unit 29 instructs the data block access unit 27 to reproduce the block x.
The data block access means 27 performs the EMI access /
The switching means 23 supplies the currently accessed block number (=
x) is notified. Data block access means 2 at the same time
7 is a disk medium 11 via the LBA access means 3.
6 is read out from the AV data. The EMI access / switching unit 23 reads EMI information corresponding to the notified block number from the disk medium 116. E read
The MI information is determined by the EMI determination unit 24, and the determination result is transmitted to the recording encryption unit 118 and the authentication / encryption unit 25.
Sent to The AV data read by the data block access unit 27 is passed to the recording encryption unit 118.

If the EMI is determined to be 00 in the EMI determination result, the changeover switch 35 of the authentication / encryption unit 25 is switched to the encryption unit 3
3, the recording encryption means 1
The changeover switch 41 of 18 switches to a side not passing through the decoding means A37 and the decoding means B38. Therefore, the AV data is output without being encrypted. If EMI is not 00, the changeover switch 35 is switched to the side via the encryption means 33.

When EMI is not 00, the changeover switch 4
1 switches to either the decryption means A 37 or the decryption means B 38 according to the instruction of the encryption selection means 39 based on the value of EMI. When the AV data from the STB is recorded and reproduced, the decoding means A is selected because EMI = 01. The AV data that has been plaintext by the recording encryption unit 118 is encrypted by the encryption unit 33 and output via the digital I / F unit 1.

Next, the stream access means 29 updates the stream pointer management information and increases the number of the currently accessed block by one. That is, x = x + 1. Next, the stream access means 29 is a digital I / F
It is determined whether another command has been received from the means 1. If another command has been received, the process ends. Otherwise, the processing after receiving the reproduction command is repeated until another command is received.

Next, the pre-recorded CGMS = 1
A case where a DVD-ROM medium of 1 or CGMS = 10 is reproduced on a television monitor will be described. At this time, CGMS =
11 is recorded in the recording encryption method B, and the CGMS = 10 AV data is recorded in the recording encryption method A.
It shall be recorded in. It is assumed that the optical disk device described in the present embodiment can understand CGMS in a recording medium.

First, a case where a prerecorded disc with CGMS = 11 is reproduced will be described. The controller sends a reproduction start command to the television monitor, and also sends a reproduction start command to the optical disk device. Then, the optical disc device reads the CGMS signal recorded in the disc medium specific area, and finds that CGMS = 11 (copy never). Therefore, EMI = 1
1 is added and the encrypted data is sent to the IEEE 1394 bus. The processing flow at this time is as follows. First, the result of the CGMS is notified to the EMI access / rewriting means 23,
Processing is performed assuming that AV data of I = 11 is recorded. Thus, the EMI determination unit 24 determines that EMI = 11. Recording encryption means 11 based on the EMI determination result
The data output of No. 8 is switched to the decryption means B38 by the encryption selection means 39. As a result, the encrypted and recorded AV data is temporarily decrypted. Next, the changeover switch 33 of the authentication / encryption unit 25 is determined based on the EMI determination result.
Is switched to the one via the encryption means 33. As a result, the encrypted AV data is output onto the IEEE 1394 bus. On the other hand, an authentication command is issued from the television monitor to the optical disk device. Then EMI =
Since the data is 11, the authentication is performed by the public key method.
If the authentication is successful, the optical disk device passes the key to the television monitor. The TV monitor decrypts the AV data encrypted with the key and reproduces it on the screen.

Next, the case of reproducing a prerecorded disc with CGMS = 10 will be described. The controller sends a reproduction start command to the television monitor, and also sends a reproduction start command to the optical disk device. Then, the optical disc device reads the CGMS signal recorded in the specific area of the disc medium 116, and CGMS = 10 (copy one age).
It can be understood that this is the case with the above-mentioned “nation”. So EMI
EMI = 10 is assigned to the assigning means 22, and the encrypted data is sent to the IEEE 1394 bus. Regarding the processing flow at this time, first, the result of the CGMS is notified to the EMI access / rewriting means 23, and processing is performed assuming that AV data of EMI = 10 is recorded. Thus, the EMI determination unit 24 determines that EMI = 10. The data output of the recording encryption unit 118 is switched to the decryption unit A37 by the encryption selection unit 39 according to the EMI determination result. As a result, the encrypted and recorded AV data is temporarily decrypted. Next, the changeover switch 35 of the authentication / encryption unit 25 switches to the one passing through the encryption unit 33 according to the EMI determination result. A which is encrypted again by this
The V data is output to the IEEE 1394 bus. on the other hand,
An authentication command is issued from the television monitor to the optical disk device. Then, since the data is EMI = 10, authentication by the common key method is performed. If the authentication is successful, the optical disk device passes the key to the television monitor. The TV monitor decrypts the AV data encrypted with the key and reproduces it on the screen.

As described above, in the present embodiment, EM
Since the recording encryption method is changed according to the I information,
Even if the EMI is tampered with at the time of output, the recording encryption method is different, and when the recording encryption is decrypted, the data is decrypted by another method that is not supported and correct data cannot be obtained. Can be disabled.

In this embodiment, the EMI information may be recorded in an area that cannot be accessed by the LBA access means. In the case of a DVD-R as shown in FIG.
An area called a power calibration area (PCA) for trial writing used for adjustment of laser power and the like, and a recording management area (RM) for recording additional recording position information when data is additionally recorded.
An area called A) may be used. Further, a lead-in area in which TOC information or the like is recorded or a lead-out area indicating the end may be used. Also, as shown in FIG.
In the case of a D-RAM, in addition to the above-mentioned area, a header section in which ID information for each sector and the like may be recorded.
Also in the DVD-RAM, the EMI is
May be recorded. In short, it is only necessary to record the EMI in an area that cannot be directly accessed by the user.

Further, the EMI recording format can be implemented in the same manner as that described in the first embodiment.

Further, MSF access means may be used in place of the LBA access means in the present embodiment. The MSF access means designates a physical address for an optical disk in minutes, seconds, and frames (one frame is 1/75 second) (Embodiment 4) Next, a fourth embodiment will be described. .

In the present embodiment, in addition to the first embodiment, a case where invalid data is output when authentication is not completed and EMI is not 00 is described.

Only the differences between the configuration of the present embodiment and the configuration of the first embodiment will be described. In FIG. 7, the stream control means 2 is different from the first embodiment in the authenticated determination means 44, the changeover switch 45, and the invalid data output means 46. The authenticated determination means is a means for determining whether the authentication has already succeeded or not. The invalid data output unit 46 is a unit that outputs invalid data such as a blue screen screen and a black screen. The changeover switch 45 is a unit that switches to the invalid data output unit 46 when the authentication is not yet completed, and switches to the authentication / encryption unit 25 when the authentication is already successful.

Next, the operation of this embodiment will be described.

Only the differences between the operation of the present embodiment and the operation of the first embodiment will be described. At the time of reproduction, the authenticated determination means 44 determines whether the authentication has already succeeded or not. If the EMI is not 00 and the authentication has not succeeded yet, the changeover switch 45 switches to the invalid data output means 46 side. In this case, the invalid data output means 46 outputs invalid data such as a blue screen and a black screen. If the authenticated determination unit 44 determines that the authentication has already been successful or the EMI is 00, the changeover switch 45 switches to the authentication / encryption unit 25 side. In this case, the authentication / encryption means is EMI 00
In the case of, plaintext AV data is output, and when EMI is not 00, encrypted AV data is output.

As described above, when EMI is not 00, valid data is not output, so that data transfer between AV devices can be performed more safely.

The digital I / F means of the present embodiment is an example of the input means of the present invention, and the EMI of the present embodiment
The access / rewrite means and the data block access means are examples of the recording / reproducing means of the present invention.

(Embodiment 5) Next, a fifth embodiment will be described.

In this embodiment, a case will be described in which EMI is mixed with AV data and recorded, unlike the first and third embodiments.

Only the differences between the configuration of the present embodiment and the configuration of the first embodiment will be described. In the stream control means 2 of FIG. 8, the EMI mixing means 47 is means for mixing EMI and AV data at the time of recording. The EMI separating means 48 is means for separating EMI and AV data during reproduction.

Next, the operation of the present embodiment will be described.

Only the differences between the operation of the present embodiment and the operation of the first embodiment will be described. The EMI detected by the EMI detecting means 21 at the time of recording and the AV data encrypted by the recording encrypting means 26 are mixed by the EMI mixing means 47. For example, EMI is added to an empty field in AV data.
Is added. At the time of reproduction, the reproduced A
The EMI is separated from the V data by the EMI separating means 48.

An EMI recording method is performed as shown in FIG. EMI and AV data are recorded as a pair in the user area 78 of the disk medium 6. Blocks 1 (79), 2 (80), 3 (81),..., And k (82) record part of EMI and AV data in pairs.

By mixing and recording AV data and EMI in this way, the frequency of access to the disk can be reduced as compared with the case where AV data and EMI are separately recorded.

Note that the digital I / F means of the present embodiment is an example of the input means of the present invention, and the EMI of the present embodiment is an example.
The mixing means, the EMI separation means, and the data block access means are examples of the recording and reproducing means of the present invention.

(Embodiment 6) Next, a sixth embodiment will be described.

In the present embodiment, the user area of the disk medium 6 is divided into two areas, one of which is EMI and the other is AV.
A case will be described in which data is stored and the other area is used for executing a command for handling computer data or the like, and the former area is made inaccessible by executing a command for handling computer data or the like.

Only the differences between the configuration of the present embodiment and the configuration of the first embodiment will be described. In the stream control means 2 of FIG. 9, the EMI mixing means 47 is means for mixing EMI and AV data at the time of recording. The EMI separating means 48 is means for separating EMI and AV data during reproduction. The user 2 area determination means 49 determines the user area as a user 1 area 51 and a user 2 area 52 as shown in FIG.
This is a means for determining whether the LBA specified by the command of the access method 1 is inside the user 2 area, and controlling not to execute the command of the access method 1 when it is outside the area of the user 2. Selector switch 5
Numeral 0 is a means for stopping the execution of the command when the determination result of the user 2 area determination means 49 is determined to be outside the user 2 area. The access method 1 is an access method for designating a recording command or a reproduction command by designating an address of a disk to be recorded and reproduced by an LBA and specifying a read size by the number of sectors. Such an access method is, for example, Information technology
noology Serial Bus protocol
l 2 (SBP-2) Revision 2h No
Vember 10, 1997.

Next, the operation of this embodiment will be described.

Only the differences between the operation of the present embodiment and the operation of the first embodiment will be described.

At the time of recording, the EMI detected by the EMI detecting means 21 and the AV data encrypted by the recording encrypting means 26 are mixed by the EMI mixing means 47. For example, AV
For example, EMI is added to an empty field in the data. At the time of reproduction, the EMI is reproduced from the reproduced AV data.
The EMI is separated by the separating means 48. AV data and EMI
Is recorded / reproduced in the user 1 area 51 by the execution of a command by the file access unit 28 that performs processing by a command of the access method 3 or the execution of a command by the stream access unit 29 that performs processing by a command of the access method 2. On the other hand, when supporting commands of access method 1 for handling computer data, etc.,
Since there is a possibility that the EMI information or the like may be falsified by accessing the user 1 area which is the area where the AV data is recorded,
As shown in FIG. 10, the user area is divided into a user 1 area 51 and a user 2 area 52. The command of the access method 1 uses the user 2 area 52. If the specified address approaches the user 1 area, the user 2 area determination means 49 does not execute the command assuming that the area is over. By doing so, it is possible to prevent EMI information and AV data stored in the user 1 area from being falsified. Therefore, an access method different from that of AV data such as a computer can be simultaneously supported.

It should be noted that the digital I / F means of the present embodiment is an example of the input means of the present invention, and the EMI of the present embodiment is an example.
The mixing means, the EMI separation means, and the data block access means are examples of the recording and reproducing means of the present invention.

(Embodiment 7) Next, a seventh embodiment will be described.

In the present embodiment, when the command of the access method 1 described in the sixth embodiment is supported, if the authentication with the device performing the processing by the access method 1 is not successful, the command of the access method 1 is not transmitted. An example in which is not executed will be described.

Only the differences between the configuration of the present embodiment and the configuration of the sixth embodiment will be described. In the stream control unit 2 of FIG. 11, the authenticated determination unit is a unit that determines whether authentication with a device that performs processing using the command of the access method 1 has already succeeded or has not succeeded. The changeover switch 58 is a unit that does not execute the command of the access method 1 when the authentication is not successful, and executes the command of the access method 1 when the authentication is successful.

Next, the operation of this embodiment will be described.

Only the differences between the operation of the present embodiment and the operation of the sixth embodiment will be described.

The AV data and EMI are recorded / reproduced by executing the command by the file access means 28 which processes by the command of the access method 3 or by executing the command by the stream access means 29 which processes by the command of the access method 2. On the other hand, when the access method 1 command that handles data different from AV data such as computer data is supported, the authenticated determination unit 44
As a result, if the device that performs the process using the command of the access method 1 is not authenticated, the command of the access method 1 is prevented from being executed, and the command of the access method 1 can be executed only when the authentication is successful. Therefore, the access method 1 can be supported without dividing the user area into two types as in the sixth embodiment. In particular, in the case of a disk device, the access method 1 is necessary for a test at the time of manufacture and the performance measurement of the disk device, and the access method 1 can be supported by adopting the present embodiment.

The digital I / F means of the present embodiment is an example of the input means of the present invention, and the EMI of the present embodiment is an example.
The mixing means, the EMI separation means, and the data block access means are examples of the recording and reproducing means of the present invention.

(Eighth Embodiment) Next, an eighth embodiment will be described.

In this embodiment, if authentication is not successful, E
The case where the MI and AV data cannot be accessed will be described.

Only the differences between the configuration of the present embodiment and the configuration of the seventh embodiment will be described. In the stream control means 2 of FIG. 12, the changeover switch 59 receives the judgment result of the authenticated judgment means 44, and if the authentication has not been successful yet, the data block access means 27 sets the LB
A means for preventing access to the A access means 3 and for enabling the data block access means 27 to access the LBA access means 3 when the authentication is successful.

Next, the operation of this embodiment will be described.

Only the differences between the operation of this embodiment and the operation of the seventh embodiment will be described.

The changeover switch 59 is provided for the authenticated judgment means 44.
When the authentication is not successful, the data block access means 27 is disabled from exchanging data with the LBA access means 3. Further, the changeover switch 59 receives the determination result of the authenticated determination unit 44 and enables the data block access unit 27 to exchange data with the LBA access unit when the authentication is successful. By doing so, it is possible to secure more security than encrypting and outputting data when authentication is not performed.

The digital I / F means of the present embodiment is an example of the input means of the present invention, and the EMI of the present embodiment
The mixing means, the EMI separation means, and the data block access means are examples of the recording and reproducing means of the present invention.

Each component of the present invention may be realized by a dedicated hardware circuit or device for realizing the respective functions, or may be realized by software using a computer.

Furthermore, a program recording medium characterized by storing a program for causing a computer to execute all or a part of each function of the recording / reproducing apparatus of the present invention also belongs to the present invention.

Further, a recording medium characterized by recording the EMI of the present invention also belongs to the present invention.

[0164]

As is apparent from the above description, according to the present invention, EMI is recorded at the time of recording, and the recorded EMI cannot be easily falsified by the user, and recording / reproducing cannot use AV data illegally. An apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a hard disk device according to first, fourth to eighth embodiments of the present invention.

FIG. 2 is a basic configuration diagram of a tape device according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a stream control unit included in the hard disk device according to the first and third embodiments of the present invention.

FIG. 4 shows authentication / authentication in the first to eighth embodiments of the present invention.
FIG. 3 is a block diagram of an encryption unit.

FIG. 5 is a block diagram of a recording encryption unit according to the first, second, fourth to eighth embodiments of the present invention.

FIG. 6 is a block diagram of stream control means constituting a VCR according to a second embodiment of the present invention.

FIG. 7 is a block diagram of a stream control unit included in a hard disk device according to a fourth embodiment of the present invention.

FIG. 8 is a block diagram of stream control means constituting a hard disk device according to a fifth embodiment of the present invention.

FIG. 9 is a block diagram of stream control means constituting a hard disk device according to a sixth embodiment of the present invention.

FIG. 10 shows a user 1 according to the sixth embodiment of the present invention.
The figure which shows the structure of an area | region and a user 2 area | region.

FIG. 11 is a block diagram of stream control means constituting a hard disk device according to a seventh embodiment of the present invention.

FIG. 12 is a block diagram of stream control means constituting a hard disk device according to an eighth embodiment of the present invention.

FIG. 13 is a view showing a recording method when EMI is recorded in block units according to the first embodiment of the present invention.

FIG. 14 is a diagram showing a recording method when recording is performed for each EMI change point according to the first embodiment of the present invention.

FIG. 15 is a view showing a recording method in the case where EMI is recorded in pairs with blocks according to the first embodiment of the present invention.

FIG. 16 is a diagram showing a recording method in the case where EMI is recorded in pairs with blocks according to the first embodiment of the present invention.

FIG. 17 is a diagram illustrating a recording method when EMI is recorded on a tape according to the second embodiment of the present invention.

FIG. 18 is a diagram illustrating a recording method in a case where EMI is embedded in AV data and recorded on a tape according to the second embodiment of the present invention.

FIG. 19 is a diagram showing a recording method in a case where EMI is recorded in a memory provided on a tape medium for each track unit according to the second embodiment of the present invention.

FIG. 20 is a diagram illustrating a recording method in the case where EMI is recorded for each change point of EMI in a memory provided on a tape medium according to the second embodiment of the present invention.

FIG. 21 is a view showing the significance of introducing the concept of no more copy into EMI according to the first embodiment of the present invention.

FIG. 22 is a diagram showing a basic configuration diagram of an optical disc according to a third embodiment of the present invention.

FIG. 23 is a block diagram illustrating a configuration of a recording encryption unit according to a third embodiment of the present invention.

FIG. 24 shows a DVD-ROM according to the third embodiment of the present invention.
The figure which shows the recording format of R.

FIG. 25 shows a DVD-ROM according to the third embodiment of the present invention.
FIG. 3 is a diagram showing a recording format of a RAM.

[Explanation of symbols]

1 Digital I / F means 2 Stream control means 3 LBA access means 4 Hard disk control means 5 Actuator means 6 disk media 7 head 8. Spindle motor means 9 Stream control means 10 Deformatting means 11 Formatting means 12 control means 13 Memory access 14 Reproduction means 15 Recording means 17 Recording head 18 Reproduction head 19 Tape media 20 notes 21 EMI detection means 22 EMI provision means 23 EMI access / rewriting means 24 EMI determination means 25 Authentication and encryption means 26 Recording encryption means 27 Data block access means 28 File access means 29 Stream access means 30 decryption means 31 Authentication means 32 key generation means 33 encryption means 34 Changeover switch 35 Changeover switch 36 Key generation means 37 Decoding means A 38 Decoding means B 39 Encryption selection means 40 encryption means A 41 Changeover switch 42 Changeover switch

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masazumi Yamada 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Inventor Shoichi Goto 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-10-210411 (JP, A) JP-A 10-79174 (JP, A) JP-A-11-306677 (JP, A) JP-A-10-134507 (JP, A) JP-A-10-108148 (JP, A) Table 2001-521261 (JP, A) International publication 98/002881 (WO , A1) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 20/10 G11B 27/00 G11B 27/10 G06F 3/06 H04H 1/00 H04L 9/00 H04N 5/85 H04N 5 / 91 H04N 7/16

Claims (7)

(57) [Claims] Claims: 1. A system for indicating use permission information of AV data.
Signal information (hereinafter referred to as EMI) is transmitted by IEEE 1394.
Based on IEEE 1394 included in the header of the packet
Input means for receiving packet data, and public key authentication means and common key authentication means.
The packet data received by the input means.
Recording / reproducing the held AV data and the EMI
Recording / reproducing means, wherein the recording / reproducing means permits copying for only one generation (copy
When recording AV data representing one generation, further duplication of the EMI is prohibited (no
rewrite to represent "more copy" and record
And the recording / reproducing means is provided by the public key type authentication means.
If authentication is successful, all license information,
Copy never (copy never), copy only one generation
Permitted (copy one generator)
n), no further copying is permitted (no more cop)
y) and permission to copy free
Outputs AV data with information to IEEE1394,
If the authentication is successful by the common key authentication method,
No more copying is permitted (no more copy)
And license information for copy free
Output only AV data that has to IEEE 1394
Recording / reproducing apparatus characterized by the above-mentioned. 2. A method for indicating usage permission information of AV data.
Signal information (EMI) is transmitted by IEEE1394 packet
Packet based on IEEE 1394
Input means for receiving a Todeta, preservation the packet data received by said input means
For recording / reproducing AV data and the EMI
Playback means and AV data by changing encryption, modulation or recording format
Data encryption means for encrypting data, and when the AV data indicates that copying is not free,
The recording / reproducing means, when recording the AV data,
The AV data encrypted by the recording encryption unit is recorded, and the recording encryption unit records the AV data so that the type of encryption and / or the key differ according to the value of the EMI at the time of recording.
A recording and reproducing apparatus for encrypting V data. 3. A method for indicating license information of AV data.
Signal information (EMI) is transmitted by IEEE1394 packet
Packet based on IEEE 1394
Input means for receiving a Todeta, preservation the packet data received by said input means
For recording / reproducing AV data and the EMI
Playback means, wherein the recording / playback means enables the user to access the EMI when the authentication with the device for sending out the AV data is successful. Recording / reproducing apparatus for recording EMI in an area which cannot be accessed by a user
Place . 4. A system for indicating usage permission information of AV data.
Signal information (EMI) is transmitted by IEEE1394 packet
Packet based on IEEE 1394
Input means for receiving a Todeta, preservation the packet data received by said input means
For recording / reproducing AV data and the EMI
Playback means, wherein the recording and playback means, when recording the AV data, records EMI in an area accessible to a user, restricts execution of a user access command for the user to access the EMI, A recording / reproducing apparatus for preventing a user from accessing EMI. 5. The recording / reproducing means, if the authentication with the device sending out the AV data is successful, permits the execution of the user access command, enables the user to access the EMI, and allows the user to access the EMI. If the authentication of the device for feeding the is not successful, claims, characterized in that that does not allow execution of the user access command
5. The recording / reproducing apparatus according to 4 . 6. An apparatus for indicating usage permission information of AV data.
Signal information (EMI) is transmitted by IEEE1394 packet
Packet based on IEEE 1394
Input means for receiving a Todeta, preservation the packet data received by said input means
For recording / reproducing AV data and the EMI
And a reproducing means, said recording and reproducing means, when reproducing the AV data, when the EMI indicates that the AV data is not freely replicating, characterized in that the output which encrypts the AV data
Recording and reproducing device . 7. A method for indicating AV data use permission information.
Signal information (EMI) is transmitted by IEEE1394 packet
Packet based on IEEE 1394
Input means for receiving a Todeta, preservation the packet data received by said input means
For recording / reproducing AV data and the EMI
Reproducing means for reproducing the AV data, if the EMI indicates that the AV data is not free to be copied and authentication with a reproduction destination device has not yet been successful,
Outputs invalid data without outputting the AV data, and outputs the AV data when the EMI indicates that the AV data is not free to be copied and authentication with the reproduction destination device is successful. Record re-recording characterized by that
Raw equipment .