JP2006179174A - Recording method of video signal, video signal recording apparatus and recording medium of video signal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent erasure of contents by a person except a recorder and non-permitted viewing and listening, which are performed to a recording medium to which a plurality of persons perform recording and reproducing operation. <P>SOLUTION: The contents are divided into division signals by a plurality of time intervals. The division signals constitute a header signal including a pointer of a recording starting position, permission flag information concerning viewing and listening or erasure of the contents and password information for obtaining permission concerning decoding or erasure. The header signal is recorded in the same recording medium as the divided contents. The reproduction of the recording medium is realized so that viewing and listening and erasing operation can be performed when verification of contents having the permission flag information and the password inputted by a user is performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video signal recording method, video signal recording apparatus, and video signal recording medium for recording or reproducing information on a recording medium, and in particular, an optical disc, a video data editing apparatus, and a computer-readable editing program. The present invention relates to a recorded recording medium, an optical disc reproducing apparatus, and a recording medium on which a computer-readable reproducing program is recorded.

  Conventionally, VTRs using videotapes have been used for recording video signals, but recently, HDDs (Hard Disk Drives) and DVD-RAMs (Random Access Memory Digital Versatile Discs) that can be accessed randomly are used. As the recording capacity of disc recorders increases, disk recorders using these disc-shaped recording media have come to be put into practical use.

  The disk recorder records and reproduces content data obtained by encoding with an encoding method defined by, for example, MPEG (moving picture experts group) on a disk-shaped recording medium, and has such random accessibility. Recording and reproduction on an excellent recording medium has a feature that a plurality of operations can be performed simultaneously, and can be used by a plurality of users.

  For example, a recording / reproducing apparatus using the disk-shaped recording medium is installed at the center of the home, and the apparatus is used as a home server, and each member of the home performs recording and reproduction of a video signal with respect to the home server. It is to make.

  In this way, when a common recording / playback device is used by multiple people, it is necessary to prevent the recorded video signals from being erased or viewed by other people. A method can be considered in which a recorded program (content) is designated for erasure and viewing, and the portion of the designated content is protected using a personal identification number.

  A content management method for dividing the content and performing encryption processing on the divided content is performed by adding a header signal to each divided content and recording it on a recording medium, and encrypting the content recorded in the header signal. This can be done using unencrypted flag information.

  A method of dividing such content, adding a header signal and recording, and reproducing based on the header signal, for example, manages content data in which a plurality of programs are recorded as recorded content for each divided program By using the list information to be recorded, it is possible to use the signal recorded on the single recording medium without re-copying or rewriting the program data information recorded on the recording medium or database. Can watch. Such a video reproduction method is similar to the method performed by the video editing apparatus.

  Video editing, which is a similar method, combines a file in which content data that is a plurality of programs is recorded, and pointer information indicating a start point and an end point of a section by specifying a plurality of partial sections in the content data. Thus, reproduction list information is generated so as to specify a reproduction procedure, and a video signal generated based on the reproduction list is output as content data.

  Then, the content data thus generated is reproduced in the order in which each of the video portions selected as the editing material is designated based on the respective reproduction list information, and is output as an edited video signal. .

  In this way, content data for a plurality of playlists created by the user is also recorded in duplicate, for example, only by increasing playback pointer information based on the respective playlists, such as by copying large-capacity content data. Therefore, it is possible to realize a playback method that can efficiently use the capacity of the recording medium, such as being able to supply edited video signals based on a plurality of playback lists.

  As another reproduction method performed using such list information, a method for realizing video editing on a single recording medium, for example, an AV file in which a plurality of AV (Audio Visual) data is recorded, There is a recording / reproducing apparatus or a video signal editing apparatus using an RTRW (Realtime Rewritable) management file in which a plurality of PGC (Program Chain) information in which a plurality of partial sections are designated by pointers are recorded.

  As the PGC information, cell information which is a divided video signal is defined by attaching a pointer to the video signal, and the cell information selected as the editing material is designated and reproduced.

In addition, the management file that defines the playback method of AV data composed of the cell information is initially defined and reproduced by the provisional order of the user-defined type PGC information, but is then reproduced by the video data editing apparatus. When the order is determined, the configuration of the video data editing apparatus configured to make the determined data order the updated playback order is disclosed in Japanese Patent Application Laid-Open No. 11-187354 “Optical disk, video data editing apparatus, editing program” Are recorded on a computer-readable recording medium on which is recorded, an optical disk reproducing device, and a computer-readable recording medium on which a reproducing program is recorded.
JP-A-11-187354

  By the way, recording media in recent years tend to have a large capacity, and a form of recording the contents of family members and all groups on a single recording medium is being introduced. In such forms of recording, There is a need for a privacy lock mechanism for prohibiting operations such as deletion or viewing by others.

  However, in a recording / reproducing apparatus in which a recording medium is simply shared by a plurality of people, there is no consideration of prohibition against erasure of such recorded programs and viewing by other people who do not want it. However, there is a problem that the content is deleted or the unauthorized viewing is performed.

  Therefore, the present invention has reproduction list information that specifies reproduction procedure by combining pointer information indicating the start point and end point of a specific section with respect to content data recorded on a recording medium, and reproduces according to the reproduction list. In this case, a password is linked and recorded in a specific playlist, and the playback is permitted only when the password entered by the user is authenticated and matched.

  In addition, in a recording apparatus that records reproduction list information for specifying a reproduction procedure by combining pointer information indicating the start point and end point of a specific section with respect to content data recorded on a recording medium, Has linked passwords to record, allowing playback only when the password is authenticated.

  Furthermore, the recording medium includes reproduction list information for specifying a reproduction procedure by combining pointer information indicating the start point and end point of a specific section with respect to content data recorded on the recording medium, and a specific reproduction list. The password is linked and recorded, and the reproduction is permitted only when the password is authenticated.

In order to solve the above-mentioned problems, the present invention comprises the following means 1) to 3).
That is,

1) In a video signal recording method in which a program video signal sent in time series is divided into a plurality and recorded on a recording medium.
A plurality of reproduction cells in which a deletion prohibiting flag for prohibiting erasure of a predetermined portion in the divided program video signal and a password for canceling the erasure prohibiting flag are described in the same cell are provided,
Creating a playlist that lists the plurality of playback cells;
A video signal recording method comprising: recording the created reproduction list and the divided program video signal transmitted in time series on the recording medium.
2) In a video signal recording apparatus that divides a program video signal sent in time series into a plurality of recordings and records them on a recording medium.
Create a playlist that includes a plurality of playback cells in which the erasure prohibition flag for prohibiting erasure of a predetermined location in the divided program video signal and the password for canceling the erasure prohibition flag are described in the same cell. Playlist creation means to
Recording means for recording the created reproduction list and the divided program video signal sent in time series on the recording medium;
A video signal recording apparatus comprising:
3) A video signal recording medium on which the reproduction list and the divided program video signals sent in time series are recorded using the video signal recording apparatus according to claim 2 .

According to the first aspect of the present invention, when performing deletion based on the reproduction cell list specified and supplied by the user, the content data locked by the password is authenticated with the password supplied by the operation of the user. A content recording method having a privacy lock function capable of locking the erasure operation of content recorded by a specific individual and preventing accidental erasure of the content because the erasure operation is performed only when the work is performed and authenticated. There is an effect that can provide.
According to the second aspect of the present invention, when performing deletion based on the reproduction cell list specified and supplied by the user, the content data locked by the password is authenticated with the password supplied by the operation of the user. A content recording apparatus having a privacy lock function capable of locking the erasing operation of the content recorded by a specific individual and preventing the content from being accidentally erased because the erasing operation is performed only when the work is performed and authenticated. There is an effect that can be provided.
According to the third aspect of the present invention, when performing deletion based on the reproduction cell list specified and supplied by the user, the content data locked by the password is authenticated with the password supplied by the operation of the user. Content that has a privacy lock function that can lock the erasure operation of the content recorded by a specific individual and prevent unexpected viewing and erasure of the content because the erasure operation is performed only when the work is performed and authenticated The recording medium can be provided.

Hereinafter, preferred embodiments of the video signal recording method, video signal recording apparatus, and video signal recording medium of the present invention will be described.
FIG. 1 is a schematic block diagram of a personal lock recording / reproducing apparatus according to the video signal recording method, the video signal recording apparatus, and the video signal recording medium, and its configuration and operation will be outlined.

  The personal lock recording / reproducing apparatus 10 shown in FIG. 1 includes a video signal input terminal 11, an MPEG encoder 12, a signal writer 13, a user operation terminal 15, a user interface 16, a play list creator 17, a password manager 19, and a recording medium 21. , A video signal terminal 31, an MPEG decoder 32, a signal reader 33, a user operation terminal 35, a user interface 36, a playlist indicator 37, a playback controller 38, and a password manager 39.

Next, the operation of the personal lock recording / reproducing apparatus 10 configured as described above will be described.
First, a digital video signal converted into a digital signal is supplied to an MPEG encoder 12 via a video signal input terminal 11, and is encoded by a compression coding method defined by MPEG (moving picture experts group). The encoded signal obtained by the conversion is supplied to the signal writer 13.

  The signal writer 13 includes a division method for dividing and recording an encoded signal encoded by the MPEG encoder via the user operation terminal 15 and a reproduction including password management described later for the divided signal. A list signal is created by the user interface 16, the playlist creation unit 17, and the password manager 19, and the created playlist signal is also supplied.

  The encoded signal and the playlist signal supplied in this way are converted into a signal of a format for recording on the recording medium 21 by the signal writer 13, an error correction signal is added, and digital modulation processing is performed. It is supplied to the recording medium 21 and recorded.

The signal recorded on the recording medium 21 is reproduced by a user operation. Next, the reproduction operation will be described.
First, a recording portion of a video signal to be reproduced by a keypad connected to a user operation terminal or a pointing device is selected and operated from a reproduction list displayed, for example, multiplexed on the video signal.

  The playlist signal relating to the selected list part is supplied to the playlist creator 37 via the user interface 36 and the password manager 39. In the playlist creator 37, the signal readout request for the playlist part is a signal reader. 33, and the signal reader 33 reads the playlist signal recorded on the recording medium 21 and supplies the read playlist signal to the playlist creator 37.

  In the playlist creator 37, when a password for playback of the playlist partial is set in the supplied playlist signal, the password is set after receiving the password supplied by the user operation. If not, the signal reader 33 supplies a control signal for reproducing the portion related to the reproduction list, reads the encoded digital video signal recorded on the recording medium, and the read signal is It is supplied to the regeneration controller 38.

  In the playback controller 38, the digital video signal for which a password is set is kept in a still state until the password is supplied and authenticated, and is supplied after the password is authenticated or when the password is not set. The digital video signal to be processed is supplied to the MPEG decoder 32.

  The MPEG decoder 32 decodes the compression-coded digital video signal to obtain a digital video signal, and the obtained digital video signal is connected to a video signal output terminal 31 and connected to a monitor TV (not shown). Supplied and pronounced and displayed with the accompanying acoustic signal.

  In this way, the digital video signal divided and recorded for each playlist is recorded on the basis of the playlist information added to each of the divided video signals. Is set, the digital video signal recorded on the recording medium is output after the authentication process.

Next, a reproduction list for performing such division recording of video signals will be described.
FIG. 2 shows a method for managing and reproducing content data composed of a plurality of video signals to be recorded using a reproduction list.

  In the content shown in the figure, program 1, program 2, and program 3 are recorded continuously, and list 1 to list 5 are used to reproduce these programs.

  The list 1 is played back as a list 1 playback part by designating the first part of the program 1 as a start position and the last part of the program 1 as an end position.

  Similarly, the list 2 is a list for reproducing the program 2 from the start (start) position to the end (End) position as a list 2 reproduction part, and the list 3 is a list for reproducing the program 3 as a list 3 reproduction part.

  These lists 1 to 3 are lists for reproducing the respective programs 1 to 3, but the list 4 is a list for reproducing the program 1 from the beginning to the end and then reproducing the program 3 from the beginning to the end. The list 5 is a list for reproducing from the middle of the program 1 to the middle of the program 2 and then reproducing from the middle to the last of the program 3 as a list 5 reproduction portion.

  In this way, even when continuous information is transmitted as in an AV (Audio Visual) signal, the AV signal is divided into a plurality of blocks, and the reproduction of the signals of the divided blocks is performed for each block. List information for the signal of the block is created, and a block to be reproduced by the created list information and its reproduction order can be defined.

  The list information can be reproduced by designating a predetermined portion of the divided AV signal. Next, a method in which the reproduction is controlled by a flag recorded by the user or encryption processing will be described.

FIG. 3 shows a state where playback control of recorded content data performed using a password is performed, and the playback operation will be described.
In the same figure, programs 1 to 3 are recorded as recorded content data in the same manner as described above, but program 2 in the program 2 is displayed with a halftone dot in the portion of program 2 in a state where playback lock processing is performed with a password. As shown.

  For example, when the header information having a lock flag is recorded on the head of the program 2 and the flag information is 0, the password is locked, and when the flag information is 1, the lock is set. As shown, the lock flag of the program 2 header is set to 1.

  As described above, in order to reproduce the program 2 having the lock flag set to 1, the program 2 is not reproduced unless the password identical to the program 2 reproduction password set together with the lock flag is input. Has been.

FIG. 4 shows and describes the playback operation when the playback lock area is set from the middle of the program.
In the figure, a reproduction lock area is set from the middle of program 1 to the end, from the beginning to the middle of program 2, and from the middle to the end of program 3.

  For example, in the playback of a program recorded with a playback lock area set from the middle as shown in the list 4, for example, the playback starts from the beginning of the program 1, and the password is authenticated when the playback lock area is reached halfway. The recording medium reading is stopped and the MPEG decoder 32 supplies a still image as a video signal output.

  Therefore, when the password is supplied from the operation terminal connected to the user operation terminal 35 and authenticated, the reproduction is resumed from that place, and the program 3 is continuously reproduced after the reproduction of the program 1 is completed. When the program 3 playback lock area is reached, password authentication is required. When the password set in program 3 is the same as the password set in the middle of program 1, authentication is performed again. The program 3 continues to be played back.

  The playback part of list 4 is played back in this way, but the playback operation according to list 5 is the same, and the playback lock area in the middle of program 1 is the playback part of list 5, so password authentication is first performed. When processing is performed and authentication is performed, the program 2 is reproduced up to the middle, and then the program 3 is reproduced from the middle.

  Also in this case, if the password set in the middle of the program is the same as the password set in the first part of program 2, playback of program 2 is started immediately after the end of playback of program 1. ing.

  As described above, playback is started or ended in the middle of a program, and designation of the location in the middle is performed by dividing the recorded content data into playback cells for each section, and a playback list for each playback cell. The information is held by a signal such as a header, and the above-described operation is performed by defining a reproduction lock flag in the header and designating a lock area.

Next, a description will be given of a method for describing play list information related to the designation of the lock area.
FIG. 5 shows the structure of the playlist information.
As shown in the figure, the playlist information is composed of two structures, an entry point information structure and a section information structure.

FIG. 6 shows the structure of the entry point information structure.
In the figure, the entry point information structure describes the number of entry point (EP) addresses first, and then the address EPn for the number n in order from 1.

  The address in the EPn information structure indicates the storage position of the EPn information stored in the VBV (video buffering verifier) information structure that temporarily stores the encoded data when the video signal is encoded by the MPEG encoder. It is described as a relative address value from the beginning of the VBV buffer information.

FIG. 7 shows the structure of the section information structure.
It is reproduction list information described adjacent to the section information structure entry point information structure, and the reproduction list information is described from list 1 information to list m information in order.

One list information, for example, the list 1 information is composed of information from the reproduction cell 1 to the reproduction cell p (p is a natural number).
FIG. 8 shows the structure of the reproduction cell.

  The data stored in the reproduction cell 1 shown in the figure is described in order of information such as a reproduction lock flag, password, program number, relative address, start PTM value, end PTM value, etc. The same applies to.

  The relative address of these pieces of information is described in terms of the relative address value relative to the start position where the recorded content data is recorded, using units such as bytes and sectors.

  The PTM value in the start PTM value and end PTM value described after the relative address value is a time stamp recorded at a clock frequency of 90 kHz or 27 MHz in the MPEG system standard (multiplexing standard). These are called PTS (Presentation Time Stamp) and DTS (Decoding Time Stamp).

  In the example shown here, the DTS is recorded as the time information of the content data information to be compressed and encoded. The DTS is recorded at a rate of one picture (one frame image) of the video signal. For example, in the case of a video signal according to the NTSC (national television system committee color television system) system, a signal having a clock frequency of 90 kHz. In contrast, one picture signal is recorded at intervals of 3003 clocks.

  Therefore, in this case, the entry point for the video signal can specify the start point or end point of the video for each picture signal, that is, in units of one frame, and the playback lock area can be specified in units of time. It becomes possible.

  The password for designating the reproduction lock area is supplied by inputting, for example, an 8-character ASCII code area of 8 bytes, or operating a 5-digit number from 00000 to 99999 by operating the numeric keypad. There is a method of storing the remainder 0x0000 to 0xFFFF obtained by dividing the number in hexadecimal notation by, for example, 0x10000, as a 2-byte number in the password area.

  As described above, the structure, operation, and lock area of the personal lock recording / playback apparatus are specified in which the playback lock area is designated and the AV signal is recorded, and the recorded playback lock area signal is played after the password is authenticated. Although the structure of the header signal to be managed has been described, the configuration and operation of the personal lock recording / reproducing apparatus will be further described.

FIG. 9 shows a more detailed configuration of the personal lock recording / reproducing apparatus.
The personal lock recording / reproducing apparatus 10a includes an MPEG encoder 12, a signal writer 13, a user interface 16a, a reproduction list start / end creation unit 17a, a reproduction list information creation unit 17b, a recording controller 17c, a recording medium / database 21a, and an MPEG decoder. 32, a signal reader 33, a playlist start / end point indicator 37a, a playback controller 38, and a password manager 39.

Next, the operation of the personal lock recording / reproducing apparatus 10a configured as described above will be described.
First, as an AV signal to be recorded, an area to be recorded is designated by a user operating a pointing device (not shown) connected to the user interface 16a by a user, and a signal indicating FREE for the area is information on start / end points. Are generated and supplied to the list start / end point generator 17a.

  In the playlist start / end point creator 17a, the supplied FREE signal is supplied to the playlist information creator 17b, and the playlist information creator 17b sends the supplied FREE signal to the recording controller 17c. Supply.

  In the recording controller 17c, after obtaining a signal indicating the supplied FREE, a control signal for starting encoding of the supplied input image signal is supplied to the MPEG encoder 12.

  The MPEG encoder 12 starts encoding of the supplied input image, and the encoded signal obtained by encoding is supplied to the signal writer 13, and the encoded signal is supplied to the encoded signal by a method defined by the MPEG system standard. The obtained time stamp at the start of encoding is generated as the start PTM value, or the time stamp generated at the end of encoding is generated as the end PTM value, and the generated PTM value is supplied to the playlist information generator 17b. The

  The PTM value supplied to the playlist information generator 17b is recorded as an address value from the first position of the compressed data at the start of encoding, that is, a relative address value, for example, in the number of bytes or on the disk medium. In this case, the number of sectors is generated in units.

  The address value generated in this way and supplied to the playlist information creator 17b is supplied to the signal writer 13, and the playlist information including the supplied encoded signal and PTM value is supplied to the signal writer 13. The data is supplied to the recording medium / database 21a and recorded on the recording medium incorporated therein.

  The recording medium is a recording medium such as a hard disk or a DVD-RAM that can be randomly accessed. The recording medium is recorded with reproduction list information added to the content data divided for each reproduction cell as a header signal.

  However, when the recording method to the recording medium is a method corresponding to the file system and can be recorded as two independent files, the content data and the header signal information may be recorded as separate file signals.

  Next, a description will be given of a method of specifying using the list information in relation to the method of specifying the reproduction lock area for the content data recorded in this way.

  When the list information is used, the relative time designation of the content is performed by the simple reproduction method when the entire program 1 is designated from the user interface 16a, or by the graphic interface using a search screen (not shown) or the like. The recorded content start and end point information is supplied to the playlist start / end point generator 17a.

  In the play list start / end point generator 17a, the start and end point information of the supplied content is converted into a signal in the description format in the format shown in FIGS. 5 to 8 and divided into the respective play cells. The user specifies whether or not a password is set for the content data.

  When the user is operated to set a password, information related to the content of the password to be added is supplied to the playlist information creator 17b, and the playback lock flag of the corresponding playlist is set to 1, for example. The playlist information generated in this way is supplied to the signal writer 13.

  The content data and playlist information supplied to the signal writer 13 are recorded on the recording medium. If there is playlist information already recorded as playlist information, the recorded contents are updated. Then, a record is made.

  Thus, the content data and the reproduction list information are recorded on the recording medium. Next, the reproduction method of the data recorded in such a manner, particularly the reproduction of the content data for which the reproduction lock flag is set will be described.

  First, content data and reproduction list information recorded on a recording medium are reproduced from the recording medium / database 21a, and those signals obtained by reproduction are supplied to a signal reader 33.

  The signal reader 33 reads the reproduction list information and the content data from the recording medium / database 21a, and these read signals are displayed on a display (not shown).

  Based on the display content displayed on the display, a playlist number desired by the user is obtained by operating the user interface 16a, and the obtained playlist number is supplied to the playlist start / end point indicator 17a. Is done.

  The playlist start / end point indicator 17a obtains the entry point address values of the start and end parts related to the playlist number based on the supplied playlist number, and based on the obtained address value. A file recorded on the recording medium is accessed and reproduced.

  In the reproduced file information, target section information is described, and a signal for starting reproduction from the head reproduction cell of the list information is supplied to the password manager 39.

  The password manager 39 determines whether the reproduction lock flag at the head of the reproduction cell is 0 or 1, and if it is 1, a password request signal for requesting supply of a password is sent to the user interface 16a. Supplied.

  In the user interface 16a, when a password request signal is supplied, a playback pause control signal is supplied to the playback controller 38. The playback controller 38 uses the supplied password request signal to record the recording medium. While the reproduction is paused, a reproduction mode switching signal for changing the moving image mode to the still image reproduction mode is supplied to the MPEG decoder 32.

  In this way, when the user recognizes that the password request signal is supplied and the user obtains a password signal obtained by operating the user interface 16a, the supplied password signal is stored in the password manager. 39, the supplied password is compared with the password described in the reproduction cell area, and when it is authenticated that they match, the MPEG decoder 32 resumes decoding of the reproduction signal from the reproduction cell.

  When such authentication is not performed, the MPEG decoder 32 skips the content data of the corresponding playback cell portion after a lapse of a predetermined time, and decodes and decrypts the content data related to the playback cell for which the next password is not set. The output image to be output is supplied from the personal lock recording / reproducing apparatus 10a.

  In this way, in the personal lock recording / reproducing apparatus 10a, when the password is not authenticated, the output image signal permitted to be reproduced is decoded by the MPEG decoder 32, and the output image signal is supplied. The output image signal is displayed on a monitor device (not shown) and viewed by the user.

  As described above, the video signal is divided into predetermined sections, and the playback cell information including the recording start position information for each of the divided video signals is recorded to include the playback permission information or the playback permission password information. The configuration and operation of a personal lock recording / reproducing apparatus that performs erasure restriction have been described.

  In addition, when a video signal is automatically recorded, such as a reserved program recording, a specific position cannot be designated for the recorded video signal, and the entire recorded program can be viewed. Or, it is performed with erasure restriction information.

  The information related to viewing or erasure restriction is provided as information related to the first position of the video signal at which recording is started, and the information is valid until a series of program recording operations is completed.

  Even in such a case, as a method of dividing the recorded program, for example, a commercial inserted in a broadcast program is detected, and new playback cell information is set with a position where broadcasting is resumed following the commercial as a division point. In the reproduction cell information, there is a method of recording the recording start position information and information related to viewing or erasure restriction.

  However, if the broadcast program cannot detect the commercial position in the stereo audio mode or the like, and if the commercial broadcast is not inserted, the series of recorded programs cannot be divided, and there is one from the start of recording to the end of recording. It is recorded as a program, and the reproduction cell information is generated only at the recording start position of the program.

  The program writer recognizes that such recording and playback in which one piece of playback cell information is added to the entire program is restricted for viewing or erasure of the entire program. For example, the program recorder can perform the recording operation with less obstacles to the effective use of the recording area of the recording medium by removing those restrictions after viewing the program or deleting the recorded program.

  Such viewing or erasure restrictions are recorded video signals transmitted through a broadcast network, programs transmitted via a medium such as a communication satellite, or communication channels such as coaxial cables and optical cables. The TV signal transmitted through the Internet, and the program supplied via many types of public transmission channels such as Internet broadcasting transmitted to a large number of users over the Internet are the target of the video signal in this embodiment.

  By the way, regarding the copyright of the video signal supplied through these public transmission lines, at present, there is no special management claim regarding secondary use such as recording of copyright in the home from the video signal supplier, The user is allowed to record the supplied video signal on a recording device using a VTR or the like, and to play back and record the recorded video signal by time shift.

  As such, at present, there are no restrictions on secondary use of video signals supplied via the public network, but in the future, broadcasts that prohibit time-shift viewing at home, or When communication is performed, it is necessary to record a video signal including the secondary usage information in the home.

  At that time, the recording of the video signal transmitted together with the secondary usage prohibition information in the home is performed in accordance with the prohibition in the video signal recording apparatus introduced into the market after such prohibition is determined. However, there are cases where such a response is not made in a recorder that is introduced to the market before that.

  Therefore, if the content supplier can provide an information bit indicating whether or not to prohibit secondary use of the content in the home and develop a transmission environment for broadcasting and communicating the content, the video signal installed in the home The recorder can be used by the user with peace of mind in the future.

  The video signal recording / reproducing apparatus provides, for example, a 1-bit flag recording area relating to the content right claim in the signal format of the reproduction cell shown in FIG. 8 described above, and permission or prohibition information supplied from the content supplier is provided there. This can be realized by recording.

  In this way, even if a new regulation regarding the content to be supplied is established in the future, it is possible to record and play the legal content corresponding to the regulation, and from the content supplier Supply will continue.

  Then, an unencrypted video signal that is not specifically claimed for secondary use of such content in the home is supplied, and the video signal that is permitted to be recorded is recorded by a user operation, and the recorded content The reproduction cell information can prevent unintentional operations such as viewing or erasing by other users.

  When such a specific user is set for viewing or erasure restriction, both the recording device and the reproducing device in the recording / reproducing system do not need to be a common device, for example, a home server coupled by a home bus The recording device may be a case where the terminal device placed in each room is a playback device, and a specific individual records the content with the playback lock flag via the network and records it. The content that has been played may be viewed and deleted only by that particular individual.

  The network is a home bus, and a specific individual contracts with a service provider, records the personal content on the content recording device of the service provider, views the recorded content by other users, and It may be configured to protect against erasure.

  As described above, the video signal transmitted simultaneously to a plurality of users, such as broadcasting, is divided, and entry point information for specifying the recording unit for each video signal obtained by the division, reproduction lock The reproduction of content data recorded with reproduction list information such as flag information and password information for unlocking reproduction is performed when reproduction based on reproduction list information designated and supplied by the user is performed. The content data locked by the lock flag is subjected to authentication work with the password supplied by the operation of the user, and the reproduction operation is performed only when authenticated, so that the content recorded by a specific individual is reproduced and recorded. It has a privacy lock function that can lock the erasure operation of the content and prevent unnecessary viewing and erasure of content. That the method of content recording and reproducing, it is possible to provide a recording and reproducing apparatus, and a content recording medium.

It is a figure which shows the structure of the outline of the personal lock recording / reproducing apparatus which is a suitable Example of this invention. It is a figure which shows the example of the reproduction | regenerating method which manages the content data comprised with a some video signal with a reproduction | regeneration list. It is a figure which shows the example of the reproduction method of the content data performed by setting a reproduction | regeneration lock area. It is a figure which shows the example by which a reproduction | regeneration lock area is set from the middle of a program, and reproduction | regeneration operation | movement is made. It illustrates the structure of the playlist information. 2 illustrates an example of the structure of an entry point information structure. It illustrates the structure of a section information structure. 3 illustrates an example of a playback cell structure in a section information structure. It is the figure which illustrated the structure of the personal lock recording / reproducing apparatus in implementation of this invention.

Explanation of symbols

10, 10a Personal lock recording / playback device 11 Video signal input terminal 12 MPEG encoder 13 Signal writer 15 User operation terminal 16, 16a User interface 17 Play list creator 17a Play list start / end point creator 17b Play list information creator 17c Recording Controller 19 Password manager 21 Recording medium 21a Recording medium / database 31 Video signal output terminal 32 MPEG decoder 33 Signal reader 35 User operation terminal 36 User interface 37 Playback list indicator 37a Playback list start / end point indicator 38 Playback controller 39 Password manager

Claims (3)

In a video signal recording method of dividing a program video signal sent in time series into a plurality of divisions and recording them on a recording medium,
A plurality of reproduction cells in which a deletion prohibiting flag for prohibiting erasure of a predetermined portion in the divided program video signal and a password for canceling the erasure prohibiting flag are described in the same cell are provided,
Creating a playlist that lists the plurality of playback cells;
A video signal recording method comprising: recording the created reproduction list and the divided program video signal transmitted in time series on the recording medium. In a video signal recording apparatus that divides a program video signal sent in time series into a plurality of divisions and records them on a recording medium,
Create a playlist that includes a plurality of playback cells in which the erasure prohibition flag for prohibiting erasure of a predetermined location in the divided program video signal and the password for canceling the erasure prohibition flag are described in the same cell. Playlist creation means to
Recording means for recording the created reproduction list and the divided program video signal sent in time series on the recording medium;
A video signal recording apparatus comprising: 3. A video signal recording medium in which the reproduction list and the divided program video signals sent in time series are recorded using the video signal recording apparatus according to claim 2.

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