JP2006236537A - Optical disk recording/reproduction apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk recording/reproducing apparatus having a function of protecting a video that is not disabled to be viewed by others. <P>SOLUTION: When information about scramble is desired to be recorded to an optical disk, a method for decoding scrambled data, a password for decoding by the decoding method, and a title number for which scramble has been performed are recorded into an out-of-lead-out area of the optical disk. When the out-of-lead-out area is accessed before the start of the reproduction of the title and there are data, the title number for which scramble has been performed is read from the out-of-lead-out area. When a title to be reproduced is the title, a password is read from the out-of-lead-out area during the start of the reproduction of the title. When an input password matches the password, the scrambled data are decoded by the decoding method read from the out-of-lead-out area. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an optical disc recording / reproducing apparatus for recording / reproducing information on / from an optical disc, and more particularly to an optical disc recording / reproducing apparatus having a function of scrambling data in order to protect a video that is not desired to be seen by others.

DVD (digital versatile disc) as an optical disc that has become widespread in recent years is often used to record video and audio information with a large amount of information such as movies. As such DVD types, DVD-ROM discs of the type in which information is recorded on the manufacturer side and cannot be rewritten on the user side, DVD-R discs of the type writable on the user side, and also rewritten on the user side. Possible types of DVD-RW discs and DVD-RAM discs are known.

By the way, in order to protect the copyright of the video / audio information recorded on such an optical disc, a CPPM (Content Protection for Pre-rec
orded Media) content protection method, etc., and C for recordable discs.
A content protection method such as PRM (Content Protection for Recoordable Media) is adopted.

In addition, a writable or rewritable optical disc employs a system that encrypts main data with content-specific identification information called CSS (Contents Scrambling System) for data such as video and audio. It is encrypted and recorded in the main information area. The physical format information including the key information (password) for decrypting the main information area and the disc manufacturing information are recorded in the control data area in the lead-in area on the inner peripheral side of the optical disc. Information is reproduced by moving the optical pickup to a portion on the inner peripheral side of the optical disc in accordance with an instruction from a system controller in the optical disc recording / reproducing apparatus.

When the key information in the control data area is detected by the optical pickup, the system controller moves the optical pickup to a part on the outer peripheral side of the optical disc, and the optical pickup is recorded in the audio / video recorded in the main information area of the optical disc. Read information. Since this video / audio information is encrypted, the video / audio information in the main information area is decrypted using the key information previously read and recorded in the control data area, and the original normal video and Reconstruct the audio data.
JP 2000-155943 A JP 2003-228909 A JP 2004-303321 A

However, in the conventional optical disc recording / reproducing apparatus, when scrambling a portion of an optical disc on which video or the like is recorded by a user's operation that is not desired to be seen by others other than the user, the lead-in area of the optical disc is used. In this case, the scramble information is recorded. In this case, the lead-in area is a standard area and affects the data structure of the optical disk.
When played back by a VD recorder) or an optical disk playback device (DVD player), there is a problem that the video is adversely affected when a title that is not scrambled is played back.

In the prior art of Patent Document 1, a password is obtained by accessing a password recording position on an optical recording medium having a written data area and an unrecorded file information area and the password is recorded at a non-standard position. Reproducing and recording the file information on the optical recording medium when the password and the password inputted from an external device match, and reproducing the information on the optical recording medium after recording the file information on the optical recording medium Is possible. However, although the password is recorded at a non-standard position (outside the lead-out area), the data itself is not protected and the protection accuracy of the data itself is low simply by allowing the data to be read with the password. There is a problem.

In the prior art of Patent Document 2, the disc identification code in the recording area (control data area of the lead-in area) outside the user area of the optical disc is encrypted by a protection command from the host for the recorded optical disc, and the protection release command The encryption is canceled. However, this prior art also records information about the scramble in the lead-in area of the optical disc, which affects the data structure of the optical disc, so that the optical disc is reproduced by another optical disc recording / reproducing apparatus. In such a case, there is a problem that the video is adversely affected when the unscrambled title is played.

In the prior art of Patent Document 3, encryption software and decryption for encrypting a data file in the read-only area of an information recording medium having both a read-only area and a recordable area without depending on the application of a personal computer. When the recording software and the authentication software for protecting the information recording medium from unauthorized copying are recorded in advance and the data file desired by the user is recorded in the recordable area, the same information recording medium is used. Recorded as an encrypted data file in the recordable area with the encryption software,
Decryption of the encrypted data file is performed using the decryption software in the same information recording medium. However, the processing by the encryption software, the decryption software, and the authentication software is complicated, and since the shiftware is recorded on the optical disc, the area for recording the original data is reduced and the optical disc cannot be used effectively. There are challenges.

The present invention has been made to solve the above-described problems, and is intended for recording information on scramble for scrambling data to protect video that is not desired to be seen by others on the optical disc. An optical disc having a function of recording the scramble information, a decoding method of the scramble information, a password for decoding the scramble information by the decoding method, and a title number being scrambled in an area outside the lead-out of the optical disc An object is to provide a recording / reproducing apparatus.

In order to achieve the above-mentioned object, the invention of claim 1 relates to the scramble when it is desired to record information on the scramble for scrambling the data in order to protect the video which is not desired to be seen by others. A decoding method of the scrambled data as information, a lead-out area recording unit for recording a password for decoding by the decoding method and a title number to be scrambled in a reading-out area of the optical disc; A data presence determination means for accessing the outside read-out area of the loaded optical disk and determining whether or not the data exists in the non-lead-out area before starting the reproduction of the title for the loaded optical disk; If it is determined that the data exists, scramble Title number storage means for reading out the title number to be read from the outside lead-out area and storing it in the buffer memory, and whether the title to be reproduced by recognizing the title number stored in the buffer memory is the corresponding title A title determination means for determining whether the title to be reproduced is a corresponding title, and when the reproduction of the corresponding title is started, the password is read from the outside lead-out area, and the password entered as the password is read And a password determination means for determining whether or not and the password read from the outside lead-out area and the input password match, the decryption method is read from the outside lead-out area. Decoding the scrambled data After decoding means for decoding said scrambled data are decoded by, to provide an optical disk recording and reproducing apparatus characterized by comprising a system controller and a reproduction start means for starting the reproduction of the corresponding title.

In this configuration, when it is desired to record, on the optical disc, scrambled information for scrambling data in order to protect a video that is not desired to be viewed by others, the scrambled data decoding method as the scrambled information is recorded. And the password for decrypting by the decryption method and the scrambled title number are recorded in the lead-out area of the optical disc by the lead-out area recording means.

Then, before starting the reproduction of the title for the loaded optical disk, the outside read-out area of the loaded optical disk is accessed, and when it is determined by the data existence determining means that data exists in the non-lead-out area, The scrambled title number is read from the outside lead-out area by the title number storing means and stored in the buffer memory.

The title number stored in the buffer memory is recognized, and the title determining means determines that the title to be played is the corresponding title. At the start of playback of the title, the password determining means reads the password from the outside lead-out area. When it is determined that the password matches the input password, the decryption unit reads the decryption method from the outside lead-out area, and decrypts the scrambled data based on the decryption method. After the scrambled data is decoded, the reproduction of the corresponding title is started by the reproduction start means.

According to this configuration, since information related to scramble is recorded in an area outside the lead-out area that is not used in the standard, it is possible to protect a video that is not seen by others other than the user without affecting the data structure, In addition, since the scramble data is also encrypted, the accuracy of protection is high and the reliability is high for the user. In addition, even if a scrambled title is played back by another optical disc recording / playback device or an optical disc playback device, only a normal video is not played back. Since it does not adversely affect the video when it is performed by the optical disk playback device, it is convenient for the user. In addition, since information related to scramble is recorded in an area outside the readout that is not used in the standard, the area used in the standard can be used effectively.

According to the second aspect of the present invention, the scrambled data as the scramble information is recorded when it is desired to record the scramble information for scrambling the data in order to protect the video that is not desired to be seen by others. Optical disc recording / reproducing apparatus comprising: a system controller that records a decryption method of the above and a password for decryption by the decryption method and a scrambled title number in an area outside the lead-out of the optical disc I will provide a.

In this configuration, when it is desired to record, on the optical disc, scrambled information for scrambling data in order to protect a video that is not desired to be viewed by others, the scrambled data decoding method as the scrambled information is recorded. And the password for decryption by the decryption method and the title number to be scrambled are recorded in an area outside the lead-out of the optical disc.

According to this configuration, since information related to scramble is recorded in an area outside the lead-out area that is not used in the standard, it is possible to protect a video that is not seen by others other than the user without affecting the data structure, In addition, since the scramble data is also encrypted, the accuracy of protection is high and the reliability is high for the user. In addition, even if a scrambled title is played back by another optical disc recording / playback device or an optical disc playback device, only a normal video is not played back. Since it does not adversely affect the video when it is performed by the optical disk playback device, it is convenient for the user. In addition, since information related to scramble is recorded in an area outside the readout that is not used in the standard, the area used in the standard can be used effectively.

According to a third aspect of the present invention, the scrambled data as the scramble information is recorded when it is desired to record the scramble information for scrambling the data in order to protect the video that is not desired to be seen by others. Recording method, the password for decoding by the decoding method and the title number being scrambled are recorded in an area outside the lead-out area of the optical disc, and before the reproduction of the title is started on the loaded optical disc. When a data is present by accessing an area outside the lead-out of the loaded optical disc, the title to be reproduced by reading the title number from the area outside the lead-out and recognizing the title number is the corresponding title. If there is When starting, a password is read from the outside lead-out area, and when the password matches the input password, a decryption method is read from the outside lead-out area and the scrambled data is decrypted by the decryption method. An optical disc recording / reproducing apparatus including a system controller for starting reproduction of a corresponding title is provided.

In this configuration, when it is desired to record, on the optical disc, scrambled information for scrambling data in order to protect a video that is not desired to be viewed by others, the scrambled data decoding method as the scrambled information is recorded. And the password for decryption by the decryption method and the title number to be scrambled are recorded in an area outside the lead-out of the optical disc.

Then, before starting playback of the corresponding title on the loaded optical disk, if the area outside the lead-out of the loaded optical disk is accessed and data exists in the area outside the lead-out, the scrambled title number is If the title that is read and recognized from the non-lead-out area and is to be played is the corresponding title, the password is read from the non-lead-out area and the entered password is If they match, a decoding method is read from the outside lead-out area, and the scrambled data is decoded based on the decoding method. After the scrambled data is decoded, the reproduction of the corresponding title is started.

According to this configuration, since information related to scramble is recorded in an area outside the lead-out area that is not used in the standard, it is possible to protect a video that is not seen by others other than the user without affecting the data structure, In addition, since the scramble data is also encrypted, the accuracy of protection is high and the reliability is high for the user. In addition, even if a scrambled title is played back by another optical disc recording / playback device or an optical disc playback device, only a normal video is not played back. Since it does not adversely affect the video when it is performed by the optical disk playback device, it is convenient for the user. In addition, since information related to scramble is recorded in an area outside the readout that is not used in the standard, the area used in the standard can be used effectively.

In the invention of claim 4, in the invention of claim 3, when the system controller wants to record information on the optical disc to scramble the data in order to protect the video that the other person does not want to see. A decoding method for decoding the scrambled data as information relating to the scramble, a password for decoding by the decoding method, and a title number being scrambled are recorded in a non-lead-out area of the optical disc. Data existence determination for determining whether or not data exists in the non-lead-out area by accessing the non-lead-out area of the loaded optical disk before starting the reproduction of the corresponding title on the loaded optical disk Means and the data is determined to exist A title number storage means for reading out the scrambled title number from the outside lead-out area and storing it in the buffer memory, and a title to be reproduced by recognizing the title number stored in the buffer memory. Title determination means for determining whether or not the title is relevant, and when it is determined that the title to be reproduced is the relevant title, the password is read from the outside lead-out area at the start of reproduction of the relevant title, Password determining means for determining whether or not the password and the input password match; and when the password read from the non-readout area and the input password match, The decoding method is read from the area and the scramble Decoding means for decoding by the decoding method Le data, after the scrambled data is decoded, and a reproduction start means for starting the reproduction of the corresponding title.

Therefore, in the system controller, it is possible to realize the non-readout area recording process, the data presence determination process, the title number storage process, the title determination process, the password determination process, the decryption process, and the reproduction start process, and thereby the scramble Information can be recorded in an area outside the lead-out area that is not used according to the standard, and can be reproduced without affecting the data structure.

As described above, according to the present invention, when it is desired to record information related to scrambling for scrambling data in order to protect video that is not desired to be viewed by others, the scrambling as information related to scrambling is recorded. A read-out area recording means for recording the decrypted data, a password for decrypting by the decryption method, and the scrambled title number in the read-out outside area of the optical disc, and a loaded optical disc Before the start of playback of the title, data existence determination means for accessing the outside read-out area of the loaded optical disk to determine whether data exists in the outside read-out area, and determining that the data exists Scrambled title number Title number storage means for reading out from the area outside the lead-out and storing it in the buffer memory, and determining whether the title to be reproduced is a corresponding title by recognizing the title number stored in the buffer memory And a title determination unit that reads a password from the outside lead-out area when the title to be played is determined to be a corresponding title, and the password and the input password are A password determination means for determining whether or not they match, and when the password read from the non-leadout area matches the input password, the decryption method is read from the non-leadout area and the scrambled The decoded data by the decoding method And a system controller having a playback start unit for starting playback of the title after the scrambled data is decoded, so that information related to scramble is recorded in an area outside the readout that is not used in the standard Therefore, it is possible to protect video that is not desired to be seen by others other than the user without affecting the data structure, and the scrambled data is also encrypted. High and reliable for the user. In addition, even if a scrambled title is played back by another optical disc recording / playback device or an optical disc playback device, only a normal video is not played back. Since it does not adversely affect when performed by the optical disk reproducing apparatus, it is convenient for the user. In addition, since information related to scramble is recorded in an area outside the readout that is not used in the standard, the area used in the standard can be used effectively.

Further, according to the present invention, when it is desired to record information related to scrambling for scrambling data in order to protect video that is not desired to be viewed by others,
A system controller for recording a method for decoding the scrambled data as information relating to the scramble, a password for decoding by the decoding method, and a title number being scrambled in an area outside the lead-out of the optical disc; Because it is provided, it is possible to record information on scramble in an area outside the readout that is not used in the standard, thereby protecting the video that does not affect the data structure and is not seen by others other than the user. In addition, since the scramble data is also encrypted, the protection accuracy is high and the reliability is high for the user. In addition, even if a scrambled title is played back by another optical disc recording / playback device or an optical disc playback device, only a normal video is not played back. Since it does not adversely affect the video when it is performed by the optical disk playback device, it is convenient for the user. In addition, since information related to scramble is recorded in an area outside the readout that is not used in the standard, the area used in the standard can be used effectively.

Further, according to the present invention, when it is desired to record information related to scrambling for scrambling data in order to protect video that is not desired to be viewed by others,
A method for decoding the scrambled data as information relating to the scramble, a password for decoding by the decoding method, and a title number for the scramble are recorded in an area outside the lead-out of the optical disc and loaded Before starting playback of the title on the optical disc, if there is data by accessing the non-readout area of the loaded optical disk, the title number is read from the non-leadout area and the title number is recognized. When the title to be played is a corresponding title, the password is read from the non-leadout area at the start of playback of the title, and when the password matches the input password, Read decryption method from region Since the system controller for decoding the scrambled data by the decoding method and starting playback of the corresponding title is provided, information on the scramble can be recorded in an area outside the readout that is not used in the standard. , Which can protect video that is not desired to be seen by others other than the user without affecting the data structure, and the scrambled data is also encrypted. Increased reliability. In addition, even if a scrambled title is played back by another optical disc recording / playback device or an optical disc playback device, only a normal video is not played back. Since it does not adversely affect the video when it is performed by the optical disk playback device, it is convenient for the user. In addition, since information related to scramble is recorded in an area outside the readout that is not used in the standard, the area used in the standard can be used effectively.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an optical disc recording / reproducing apparatus according to an embodiment of the present invention.

The optical disk recording / reproducing apparatus includes a spindle motor 5 that rotates the optical disk 1, an optical pickup 2 that optically writes / reads information to / from the optical disk 1, and moves the optical pickup 2 in the radial direction of the optical disk 1. And the spindle motor 5 and the thread 3 are driven in accordance with an instruction from the system controller 22 and the objective lens (not shown) built in the optical pickup 2 is moved to change the focal position of the laser light to the optical disk 1. And a servo control unit 4 that performs control to move the recording surface in the vertical and horizontal directions.

The optical disc recording / reproducing apparatus also amplifies an RF signal which is a read signal from the optical pickup 2 during reproduction of the optical disc 1 and converts the RF signal output from the RF amplifier 6 into digital data. A digital signal processing unit 8 that stores data generated by performing signal demodulation processing and error correction processing according to the data format of the optical disc 1 in the RAM 7, and is output from the digital signal processing unit 8 in response to an instruction from the system controller 22. A stream separation unit 9 is provided for separating audio data, sub-picture data, and video data from the data stream.

The optical disc recording / reproducing apparatus also receives an audio decoder 11 that receives the audio data output from the stream separation unit 9 and performs a predetermined decoding process, and temporarily stores the data to perform the decoding process in the audio decoder 11. The RAM 10 to be stored in the sub-picture decoder 13, the sub-picture decoder 13 that inputs the sub-picture data output from the stream separation unit 9 and performs a predetermined decoding process, and the sub-picture decoder 13 temporarily stores the data to perform the decoding process. The RAM 12 to be stored in the video decoder 15, the video decoder 15 that receives the video data output from the stream separator 9 and performs a predetermined decoding process, and temporarily stores the data for the decoding process in the video decoder 15. RAM 14 is provided.

The optical disk recording / reproducing apparatus also synthesizes the data output from the video decoder 15 and the data output from the sub-picture decoder 13 in accordance with an instruction from the system controller 22, and outputs from the video processor 17. The synthesized data is converted into a video signal for display and a video encoder 18 that displays an image on the display device 20, and the data output from the audio decoder 11 is converted into an analog audio signal and supplied to, for example, a speaker 19. And a D / A converter 16.

The optical disc recording / reproducing apparatus also performs various operations such as a recording key for giving a recording instruction to the system controller 22, a reproducing key for giving a reproducing instruction, and a stop key for giving a recording / reproducing stop instruction. A remote controller 21 having keys and the system controller 22 for controlling the entire apparatus are provided. In addition, this optical disk recording / reproducing apparatus performs a calculation process according to the flash ROM 23 storing a program and data for controlling each component of the apparatus and controlling the entire apparatus, and the program and data of the flash ROM 23. CPU 24 for controlling system controller 22 and CPU 24
And a RAM 27 for temporarily storing data necessary for the above arithmetic processing.

The optical disc recording / reproducing apparatus also includes a recording data modulation circuit 25 that modulates video / audio data sent from a television receiver (not shown), a personal computer, or the like to the optical disc 1, and the recording data modulation circuit. And a laser modulation circuit 26 that outputs to the optical pickup 2 a laser modulation signal for modulating the laser light emitted from the optical pickup 2 based on the modulation data modulated by 25.

When the system controller 22 wants to record information related to scrambling to scramble data in order to protect a video that is not desired to be viewed by others as a constituent element of the present embodiment, Out-readout area recording for recording a scrambled data decoding method as information relating to scramble, a password for decoding by the decoding method and a scrambled title number in the out-readout area of the optical disc Means 221.

Further, the system controller 22 determines whether or not data exists in the lead-out outside area by accessing the lead-out outside area of the loaded optical disc 1 before starting the reproduction of the corresponding title with respect to the loaded optical disc 1. Data presence determination means 222 for performing the reading, the title number storage means 223 for reading the scrambled title number from the outside lead-out area and storing it in the buffer memory 28 when it is determined that the data exists, and the buffer memory And a title determination means 224 for determining whether or not the title to be reproduced is a corresponding title by recognizing the title number stored in 28.

In addition, when it is determined that the title to be played is a corresponding title, the system controller 22 reads the password from the outside lead-out area at the start of playback of the title, and the password and the input password The password determination means 225 for determining whether or not the passwords match, and when the password read from the outside lead-out area matches the input password, the decryption method is read out from the outside lead-out area Decoding means 226 for decoding the scrambled data by the decoding method
And playback start means 227 for starting playback of the corresponding title after the scrambled data is decoded. The decoding method is, for example, that the number of data bits is 8
If it is a bit, it refers to a method of returning the data with the bit exchanged, such as exchanging the first 4 bits and the latter 4 bits, or exchanging odd-numbered bits and even-numbered bits.

It is a schematic diagram which shows the recording state of the writable or rewritable optical disk in this embodiment of FIG. In FIG. 2, the optical disc has a lead-in area 201, a user data area 202, and a lead-out area 203 that are used in the standard from the inner periphery to the outer periphery, and a lead-out outer area 204 that is not used in the standard.

In the lead-in area 201, control information such as a disc standard name, a disc size, a disc structure, a recording density, a rotational speed, and a recording power is recorded. In the user data area 202, video / audio data desired by the user is recorded. The lead-out area 203 is an area indicating finalization of the video / audio data recorded in the user data area 202. In the outside lead-out area 204, a method for decoding the scrambled data as information relating to the scramble, a password for decoding by the decoding method, and a title number for the scramble are recorded.

FIG. 3 is a flowchart for explaining processing related to scrambling in the present embodiment. Processing related to scrambling will be described with reference to this flowchart.

A method of decoding the scrambled data as the scramble information when the scramble information for scrambling the data is to be recorded on the optical disc 1 in order to protect the video that the other person does not want to see (step S1). The password for decryption by the decryption method and the scrambled title number are recorded in the lead-out outside area 204 of the optical disc 1 (step S2).

That is, in order to scramble the data in order to protect the video that the other person does not want to see, in response to the operation of the remote controller 21 by the user, the non-readout area recording means 221 of the system controller 22 The optical pickup 2 is controlled via the optical pickup 2 so that the optical pickup 2 is moved so as to irradiate laser light to the lead-out outside area 204 of the optical disc 1, and the scrambled data decoding method as the scramble information and the decoding method Thus, the password for decryption and the scrambled title number are recorded in the lead-out outside area 204. Therefore, this optical disc 1
Is assumed to be an optical disc on which scrambled data is present and once taken out from the optical disc recording / reproducing apparatus.

And, for example, the optical disc 1 is loaded into this optical disc recording / reproducing apparatus at a later date,
When the playback mode is set by operating the remote controller 21, the data presence determination means 222 of the system controller 22 is connected to the optical pickup 2 via the servo control unit 4 before starting the playback of the main information.
To access the lead-out outside area 204 of the loaded optical disc 1,
It is determined whether data exists in the lead-out outside area 204 (step S3).

In this case, as described above, the scrambled data decoding method, the password for decoding by the decoding method, and the scrambled title number are recorded on the optical disc 1 as described above. Since the data exists in the lead-out outside area 204, the title number storage means 223 of the system controller 22 uses the optical pickup 2 to extract the scrambled title number from the lead-out outside area 204. The data is read out and stored in the buffer memory 28 via the digital signal processing unit 8 (step S4).

Then, the title determination means 224 of the system controller 22 is connected to the buffer memory 28.
Is recognized, and it is determined whether or not the title to be reproduced is the corresponding title (step S5). If it is determined that the title to be reproduced is the corresponding title, When reproduction is started, the password determination unit 225 reads the password from the outside lead-out area 204, and when it is determined that the password and the password input by the operation of the user's remote control 21 match (step S6).
) The decoding means 226 reads the decoding method from the outside lead-out area 204, and decodes the scrambled data based on the decoding method (step S7). After the scrambled data is decoded, the reproduction of the corresponding title is started by the reproduction start means 227 (step S8), and when the reproduction is completed (step S9), this process is finished.

On the other hand, since the process for the optical disc on which the scrambled data is not recorded, the data is not scrambled, so the process of No in step S1 is performed, and there is no data in the area outside the readout. The process of No in step S3 is performed, and then
The process proceeds to the reproduction start process in step S8. In addition, even when the playback title is not the corresponding title (
Step S5) and the process proceeds to the reproduction start process in step S8.

As described above, according to the present embodiment, since information related to scramble is recorded in an area outside the lead-out area that is not used in the standard, a video that does not affect the data structure and is not seen by others other than the user is displayed. Since the data related to the scramble can be encrypted, the accuracy of the protection is high and the reliability is high for the user.
In addition, even if a scrambled title is played back by another optical disc recording / playback device or an optical disc playback device, only a normal video is not played back. Since it does not adversely affect the video when it is performed by the optical disk playback device, it is convenient for the user. In addition, since information related to scramble is recorded in an area outside the readout that is not used in the standard, the area used in the standard can be used effectively.

It is a block diagram which shows the structure of the optical disk recording / reproducing apparatus which concerns on one Embodiment of this invention. It is a schematic diagram which shows the recording state of the writable or rewritable optical disk in the said embodiment. It is a flowchart for demonstrating the process regarding a scramble in the said embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk 22 System controller 28 Buffer memory 205 Lead-out outside area 221 Lead-out outside area recording means 222 Data existence judgment means 223 Title number storage means 224 Title judgment means 225 Password judgment means 226 Decoding means 227 Playback start means

Claims (4)

In an optical disc recording / reproducing apparatus for recording / reproducing information on / from an optical disc, when it is desired to record information related to scrambling to scramble data in order to protect video that is not desired to be seen by others, Out-readout area recording for recording a scrambled data decoding method as information relating to scramble, a password for decoding by the decoding method and a scrambled title number in the out-readout area of the optical disc Means for determining whether or not there is data in the non-lead-out area by accessing the non-lead-out area of the loaded optical disk before starting playback of the title for the loaded optical disk; , It was determined that the data exists A title number storage means for reading out the scrambled title number from the outside lead-out area and storing it in the buffer memory, and a title to be reproduced by recognizing the title number stored in the buffer memory. Title determination means for determining whether or not the title is relevant, and when it is determined that the title to be reproduced is the relevant title, the password is read from the outside lead-out area at the start of reproduction of the relevant title, Password determining means for determining whether or not the password and the input password match; and when the password read from the non-readout area and the input password match, The decoding method is read from the area and the scramble An optical disc comprising: a system controller comprising: decoding means for decoding stored data by the decoding method; and playback start means for starting playback of the title after the scrambled data is decoded Recording / playback device. In an optical disc recording / reproducing apparatus for recording / reproducing information on / from an optical disc, when it is desired to record information related to scrambling to scramble data in order to protect video that is not desired to be seen by others, A scrambled data decoding method as scrambled information, and a system controller for recording a password for decoding by the decoding method and a scrambled title number in an area outside the readout of the optical disc. An optical disc recording / reproducing apparatus characterized by the above. In an optical disc recording / reproducing apparatus for recording / reproducing information on / from an optical disc, when it is desired to record information related to scrambling to scramble data in order to protect video that is not desired to be seen by others, A method of decoding the scrambled data as information relating to scramble, a password for decoding by the decoding method, and a title number being scrambled are recorded in an area outside the readout of the optical disc, and a loaded optical disc Before the corresponding title starts playing,
When data is present by accessing an area outside the lead-out of the loaded optical disc, the title to be reproduced by reading the title number from the area outside the lead-out and recognizing the title number is the corresponding title. If the password is read from the non-leadout area at the start of playback of the title, and the password matches the input password, the decryption method is read from the non-leadout area and the scrambled data An optical disk recording / reproducing apparatus comprising: a system controller that decodes the video by the decoding method and starts reproduction of the corresponding title. The system controller decodes the scrambled data as the scrambled information when the scrambled information is to be recorded on the optical disc in order to scramble the data in order to protect a video that the other person does not want to see. Method, a read-out area recording means for recording a password for decoding by the decoding method and a scrambled title number in the read-out area of the optical disc, and a title corresponding to the loaded optical disc Before the start of reproduction, when it is determined that the data exists, data presence determination means for determining whether or not there is data in the lead-out area by accessing the lead-out area of the loaded optical disk, Scrambled title Nan Title number storage means for reading out from the area outside the lead-out and storing it in the buffer memory, and determining whether the title to be reproduced is a corresponding title by recognizing the title number stored in the buffer memory And a title determination unit that reads a password from the outside lead-out area when the title to be played is determined to be a corresponding title, and the password and the input password are A password determination means for determining whether or not they match, and when the password read from the non-leadout area matches the input password, the decryption method is read from the non-leadout area and the scrambled The decoded data by the decoding method No. means and, after the scrambled data is decoded, the optical disc recording and reproducing apparatus according to claim 3, characterized in that it comprises a reproduction start means for starting the reproduction of the corresponding title.

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