JP5095026B2 - Digital content transmission / reception system and digital content transmission / reception method - Google Patents

Description

The technical field relates to devices and methods for recording digital information. Particularly, the present invention relates to a copy control technique in a recording apparatus.

  Regarding the above technical field, Japanese Patent Application Laid-Open Publication No. 2004-228561 has an object of “providing an apparatus and method capable of restricting recording on a recording medium in a recording / reproducing apparatus of digital information to be copyright protected”. When the copy control information is (Copy One Generation), the recording / playback control circuit records the converted digital information obtained by converting the information to a predetermined bit rate together with the information and the copy number information on the recording medium. When the digital information or the converted digital information is moved to the recording medium of the recording apparatus connected to the reproducing apparatus while being (Copy No. More) according to the copy control information, the possible number of times is reduced. Copy number information is updated, and the digital information signal or the converted digital information, the copy control information, and the copy number information are recorded again. And records the body and configured to reproduction disabling said digital information signal or the converted digital information. "It has been described.

JP 2006-1114090 A

In recent years, with the widespread use of digital broadcasting, various recording media have been distributed, and various forms of viewing digital content have become available. Under such circumstances, from the viewpoint of copyright protection, it is conceivable to control data transmission / reception among a plurality of recording devices or recording media by using copy control information. However, the control based on the copy control information makes it difficult to determine whether or not copying is possible between arbitrary devices, thus reducing the usability of the user. The digital information recording / reproducing method disclosed in Patent Document 1 improves the usability by managing the number of copies of digital information whose copy control information is Copy Once Generation, and displaying the information on the number of copies that can be copied to the user. doing.

However, in the digital information recording / reproducing apparatus disclosed in Patent Document 1, as a digital information copy control method, it is assumed that digital data is recorded by separating whether copying is possible or copying is possible depending on the type of recording medium. There is no description up to the control method.

In particular, for example, setting of copy control information at the time of recording reservation and change of copy control information at the time of recording execution according to the recording reservation are not considered.

In order to solve the above problems, for example, the configuration described in the claims is adopted .

According to the above means, user convenience at the time of recording or reservation can be improved while being suitable for copy control information.

It is a block diagram which shows the structural example of a system. 3 is a block diagram illustrating a configuration example of a transmission device 1. FIG. It is an example of the structure of the content use descriptor which is one of copy control information. This is a description example for each field of the content usage descriptor. It is an example of the structure of the digital copy control descriptor which is one of copy control information. It is an example of the information which controls a copy generation. It is an example of the reception process in the receiver 3 of each field of the content use descriptor sent from the transmitter 1. This is an operation example of protection of program content by using the copy control information by the transmission apparatus 1. This is an example of control when the receiving device 3 stores (records) program content using copy control information. 2 is a block diagram illustrating a configuration example of a recording apparatus 10. FIG. 3 is a block diagram illustrating a configuration example of a recording / playback control unit 104. FIG. It is a schematic diagram which shows the structural example of the information of the detachable recording medium. It is a schematic diagram which shows the structural example of the information of the detachable recording medium. It is a schematic diagram which shows an example which displays recording reservation information as a list. It is a schematic diagram which shows an example which displays recording reservation information as a list. It is a schematic diagram which shows an example of management of the recorded copy control information. It is a flowchart which shows the example of a process of the copy control information setting before video recording execution. It is a flowchart which shows the example of a process of the copy control information setting before video recording execution. It is a schematic diagram which shows an example which displays a list of reservation video recording result information. It is a schematic diagram which shows an example of a message display. It is a schematic diagram which shows an example which displays a list of recorded programs. 2 is a block diagram illustrating a configuration example of a recording apparatus 10. FIG. It is a schematic diagram which shows an example which displays recording reservation information as a list. It is a schematic diagram which shows an example which displays a list of recorded programs. It is a schematic diagram which shows an example which displays the free capacity of a recording medium. It is a flowchart which shows the example of a process of the copy control information setting at the time of recording reservation.

Examples of the preferred embodiment (examples) of the present invention will be described below. However, the present invention is not limited to this embodiment.

<System>
FIG. 1 is a block diagram illustrating a configuration example of a system according to the present embodiment. The case where information is transmitted / received by broadcast and recorded / reproduced is illustrated. However, it is not limited to broadcasting but may be VOD by communication, and is also collectively referred to as distribution.

1 is a transmitter installed in an information providing station such as a broadcast station, 2 is a relay device installed in a relay station or a broadcasting satellite, 3 is a receiver installed in a user's house, and 10 is a receiver 3 This is a reception recording / reproducing unit built in. The reception recording / reproducing unit 10 can record and reproduce the broadcast information.

The transmission device 1 transmits the modulated signal radio wave via the relay device 2. For example, transmission by cable, transmission by telephone line, transmission by terrestrial broadcasting, etc. can be used. As will be described later, the signal radio wave received by the receiving device 3 is demodulated into an information signal, and then recorded as a signal suitable for recording as necessary. Further, the user can view the video and audio indicated by the information signal by connecting the receiving device 3 to a display (not shown) when the receiving device 3 has a built-in display, or connecting the receiving device 3 to a display (not shown). Can do.

<Transmitter>
FIG. 2 is a block diagram illustrating a configuration example of the transmission device 1 in the system of FIG.

Reference numeral 11 denotes a source generation unit, 12 denotes an encoding unit that performs compression by the MPEG method, 13 denotes a scramble unit, 14 denotes a modulation unit, 15 denotes a transmission antenna, and 16 denotes a management information addition unit. camera,
Information such as video and audio generated by the source generation unit 11 including a recording device is compressed by the encoding unit 12 so that it can be transmitted in a smaller occupied band. If necessary, the scrambler 13 performs transmission encryption so that a specific viewer can view. After modulation to be a signal suitable for transmission by the modulation unit 14, the signal is transmitted from the transmission antenna 15 to the relay device 2 as a radio wave. At this time, the management information adding unit 16 adds information such as copy control information and current time, which is information for controlling copying.

In many cases, a plurality of pieces of information are multiplexed in one radio wave by a method such as time division or spread spectrum. Although not shown in FIG. 2 for simplicity, in this case, there are a plurality of systems of the source generation unit 11 and the encoding unit 12, and a multiplex for multiplexing a plurality of pieces of information between the encoding unit 12 and the scramble unit 13. Part (multiplexing part) is placed.

<Copy control information>
The copy control information is information for controlling restrictions such as whether or not copying is allowed and the number of times of copying, and is added by the management information adding unit 16, for example. Includes content usage descriptor and digital copy control descriptor.

FIG. 8 shows an example of operation related to protection of program content by using copy control information.

“Operation possible” indicates that the transmission side can select a generation restriction using digital copy control information for content corresponding to each service form. For example, “pay-per-view” indicates that any digital copy control information may be used. On the other hand, “pay-per-view pay broadcasting” indicates “copy prohibited” on the transmission side. Indicates that it cannot be selected.

“Flat / Tier” refers to contracting a plurality of channels together for pay broadcasting or the like as a flat contract, and contracting for each channel as a tier contract.

“Other than the above” includes, for example, “in the case of a program that is not a pay broadcast and does not involve content protection”.

  FIG. 3 shows an example of the structure of a content usage descriptor that is one piece of copy control information. The content usage descriptor is generated and added by, for example, the management information adding unit 16, and stored in PSI (Program Specific Information) (eg, PMT (Program Map Table)) or SI (Service Information) of MPEG-TS and transmitted. Information.

The usage of the content usage descriptor is arranged (transmitted) when describing control information related to storage (recording) and output for the program. This means that if the 1-bit field of digital_recording_control_mode (digital copy mode bit) is “1”, even if the digital_recording_control_data of the digital copy control descriptor described in FIG. This indicates that recording is possible as "Copyable". In the case of “0”, it cannot be recorded as “Number Limited Copy Allowed”.

  The content usage descriptor is always arranged (sent) when the program is a target of output protection. This output protection means that protection is performed for the high-speed digital interface output of the content that can be copied without restriction using the output protection bit (encryption_mode) of the content usage descriptor. In other words, although it is encrypted when output via a digital interface or when copying to a recording medium, it does not limit the number of copies or generations. Retransmission to the Internet is virtually impossible. Also called “copy free with output protection” or EPN (encryption plus non-assertion).

Further, it is always arranged (sent) when the digital copy control information of the program is “one-generation copy is permitted” and is not a target of “number-limited copy is permitted”.

  FIG. 4 shows an example of the description contents of each field of the content usage descriptor.

  In “descriptor_tag”, “0xDE” indicating a content use descriptor is described. In “descriptor_length”, the descriptor length of the content use descriptor is described. In “digital_recording_control_mode”, “0” is described when the digital copy control information is “one generation copy is permitted” and is not a target of “number limited copy is possible”. If the digital copy control information is “one-generation copy is permitted” and the target is “number-limited copy is permitted”, “1” is described.

  In “encryption_mode”, “0” is described when the digital copy control information is “copying possible without restriction” and the high-speed digital interface output is protected.

  “Retention_mode” means temporary storage control bit, and “0” is written to indicate that temporary storage is possible even if “digital_recording_control_data” (digital copy control information) in the digital copy control descriptor is “copy prohibited” To do. “Retention_state” means a temporary storage allowable time, and describes “111” indicating that storage for 1 hour 30 minutes is possible. Note that “image_constraint_token”, “retention_state”, and “encryption_mode” are “1” in the default state.

  Each field will be described later with reference to FIG.

FIG. 5 shows an example of the structure of a digital copy control descriptor that is one piece of copy control information.
The digital copy control descriptor is information that is generated and added by, for example, the management information adding unit 16 and stored and transmitted in MPEG-TS PSI (such as PMT) or SI.

  The digital copy control descriptor represents information for controlling the copy generation by a 2-bit field of “digital_recording_control_data” (digital copy control information).

FIG. 6 shows an example of digital copy control information. When the digital copy control information is “00”, it indicates that copying is possible without restriction, when it is “01”, it indicates that it is defined by the broadcaster, and when it is “10”, it is one generation copy. “11” indicates that copying is prohibited. Note that one-generation copy is possible when the received broadcast signal is recorded (
This means that the broadcast signal cannot be copied (copied) after recording.

The content use descriptors in FIGS. 3 and 4 are also called copy number restriction information, and the digital copy control information in FIGS. 5 and 6 is also called copy generation restriction information.

Receiving apparatus 3 related to the copy control information described with reference to FIGS.
A detailed example of the process will be described.

FIG. 7 shows an example of processing for each field of the content usage descriptor in the receiving apparatus 3.

  If “descriptor_tag” is “0xDE”, it is determined that the descriptor is a content use descriptor. Based on “descriptor_length”, it is determined as the descriptor length of the content use descriptor. If “digital_recording_control_mode” is “1”, if the digital copy control information is “one-generation copy is permitted”, it is determined that the number of copies is permitted. If it is “0”, if the digital copy control information is “one-generation copy is permitted”, it is determined that the number of copies is not permitted. With regard to “image_constraint_token”, it is determined that the resolution of the video signal output is not limited no matter what value is entered. Regarding “retention_mode”, it is determined that temporary storage is possible regardless of any value. Regarding “retention_state”, it is determined that the temporary storage allowable time is 1 hour 30 minutes regardless of any value. If “encryption_mode” is “1”, it is determined that the high-speed digital interface output is not protected when the digital copy control information is “Copyable without constraint”. If it is “0”, if the digital copy control information is “copying possible without restriction”, it is determined that the high-speed digital interface output is protected.

  In addition, when a content utilization descriptor is not arrange | positioned (sent) for some reason, it is good to interpret each field as the following values. digital_recording_control_mode = '1', image_constraint_token = '1', retention_mode = '0', retention_state = '111', encryption_mode = '1'.

FIG. 9 shows an example of control in which the receiving device 3 stores (records) program content using copy control information.

  For example, when program content is stored, if digital_recording_control_data of the digital copy control descriptor is “10” and “one-generation copying is possible”, the content shown in FIG. Accumulate as "copy prohibited". However, when digital_recording_control_mode is “1”, it is stored as “number limited copy allowed”. Even when accumulation is performed with “recopy prohibited”, the value of digital_recording_control_data in the digital copy control descriptor does not need to be changed.

  If digital_recording_control_data of the digital copy control descriptor is “10” and “one-generation copying is possible”, a plurality of copies must not be generated. However, storage in areas where the user cannot access for backup purposes is excluded. In addition, the above restriction is imposed on each broadcast reception unit, and when there are a plurality of broadcast reception units, the above restriction is imposed on each broadcast reception unit.

Regarding the number-limited copy permitted, N copies can be generated from the program content stored as “number-limited copy permitted”. The value of N may be based on a standard, for example. When a copy is generated via the high-speed digital interface output, the copy may be performed when the number of copies to be generated can be determined by using a move function or the like.
For example, it can be recognized that the interface is IEEE 1394 and the output destination is a device compatible with the DTCP standard. The generated copy is set to “recopy prohibited” or an equivalent state.

  Also, when reproducing and outputting program content stored as “Number Limited Copy Allowed”, the high-speed digital interface performs output of No More Copies defined in DTCP (Digital Transmission Content Protection). . The analog video output and digital audio output can be output as “one generation copy permitted”.

When the recording medium is a removable recording medium, there is another limitation in addition to FIG. For digital recording of program content to a removable recording medium, digital_recording_control_data of the digital copy control descriptor is “10” and “one generation can be copied” in TV, data service digital recording, or audio service digital recording. When receiving and recording content, even if it is the first generation of the received content, three or more copies are not allowed (for example, when receiving and recording a broadcast on three or more recording media at the same time). Is not recorded). This value (three or more examples) may be based on a standard, for example. In addition, a plurality of one-generation copies having the same recording format are not generated. However, digital recording to an area that the user cannot access for backup purposes is excluded. In addition, the restriction on recording on a digital recording medium is imposed on each broadcast reception unit. When there are a plurality of broadcast reception units, the above restriction is imposed on each broadcast reception unit. If the receiving device has a recording method that does not support digital_recording_control_mode, the program content whose copy_control_type in the digital copy control descriptor is '01' and digital_recording_control_data is '10' is affected by the value of digital_recording_control_mode in the content usage descriptor. First of all, digital recording is performed in the manner of "one generation copy is possible".

<Receiver (1)>
FIG. 10 shows a configuration example of a recording apparatus 100 as an example of the recording apparatus 10 in the receiving apparatus 3.
An apparatus having not only a recording function but also a reproducing function may be used.

An input terminal 101 receives digital data such as radio waves from the relay device 2 as input. 1
A receiving unit 02 performs frequency conversion, modulation operation, error correction, and the like on the digital data received from the input terminal 101, and separates the multiplexed bit stream in one transponder into packets such as video and audio. A video / audio information processing unit 103 decodes video data and audio data. Reference numeral 104 denotes a recording / reproduction control unit that controls recording or reproduction on a recording medium. FIG. 11 shows an example of a more detailed internal configuration of this module. Reference numeral 105 denotes a recording medium for recording digital data such as a hard disk drive. 106
Is a display control unit that generates output data from video / audio data and display data of various application interfaces (IF). For example, the video data processed by the video / audio processing unit 103 is scaled as necessary, and the video data, for example, an interface for operation or a still image such as a still image is superimposed on the image data uniquely prepared by the recording device 100 to display the display image. Is generated. An output terminal 107 transfers the generated data to a display device (display unit) such as a display liquid crystal panel. Reference numeral 108 denotes a remote control IF when the user performs an operation using the remote control. Reference numeral 109 denotes an input terminal, which is a light receiving unit that receives a signal from the remote controller. An operation unit 110 is provided with a button group for performing operations such as recording and reproduction, for example, and the user directly operates the buttons to control the recording apparatus 100. Reference numeral 111 denotes a control unit that controls the operation of the recording apparatus 100, and includes, for example, a CPU. Reference numeral 112 denotes a nonvolatile memory for recording information. A system bus 113 performs data communication between each block connected to the control unit 111. Reference numeral 114 denotes a slot (also referred to as an attaching / detaching portion) in which an attachable / detachable recording medium can be attached. Reference numeral 115 denotes a detachable recording medium, which performs recording in the same format as the recording medium 105, for example. Reference numeral 116 denotes a switch, which selects which of the recording medium 105 and the removable recording medium 115 the data is output to, or which data is input to the recording / playback control unit 104. Although only one switch is shown in FIG. 10, it is conceivable to prepare different switches for input and output. Alternatively, a configuration in which a recording / reproducing control unit is prepared for each of the recording mediums 115 that can be attached to and detached from the recording medium 105 may be employed.

FIG. 11 shows a configuration example of the recording / playback control unit 104. An input / output terminal 201 is connected to the system bus 113 and transmits a control signal. Reference numeral 202 denotes an input terminal which inputs digital data including video data and audio data to be recorded on a recording medium. A copy control information processing unit 203 analyzes the copy control information included in the digital data and updates it as necessary. Reference numeral 204 denotes an encryption unit that encrypts input digital data using, for example, key information transmitted by the control unit 111. Reference numeral 205 denotes a recording control unit which issues a command for recording on a recording medium and performs processing such as transfer of digital data. Reference numeral 206 denotes an output terminal which is connected to a recording medium. Reference numeral 207 denotes an input terminal for inputting digital data to be reproduced from the recording medium. A reproduction control unit 208 issues a command to the recording medium and reproduces desired digital data. A decrypting unit 209 decrypts the read encrypted digital data by using, for example, key information transmitted from the control unit 111. An output terminal 210 outputs the decoded digital data. A system bus 211 is a system bus that performs data communication between the blocks connected to the control unit.

When accumulating digital data in the recording medium 105, the control unit 111 controls the copy control information processing unit 203 based on, for example, copy control information included in the digital data,
Copy control information is added to the data to be recorded.

The copy control information added to the recording data includes, for example, copy generation management information and copyable number information. The copy generation management information is, for example, a 2-bit signal as shown below. 11 Copy-never 01 Recording After that, re-copying is not possible (No-more-copies) 10 Only one generation can be recorded (Copy-one-generation) 00 Copying is possible (Copy-free). The copyable number information is an integer of 0 or more, and it is conceivable to specify how many copies can be made. Further, digital data whose copy generation management information is “copiable” may include data that is encrypted and output protected, and data that is not encrypted and output protected.

FIG. 12 shows an example of a preferable data configuration of the removable recording medium 115 (for example, a removable hard disk). Reference numeral 115 denotes a management area that cannot be accessed by the user. By storing the key data for encrypting the digital data and recording it in the data recording area 302 in the management area, confidentiality is maintained. A data recording area 302 allows the user to access internal data by a predetermined operation. 301 stores key data. In 302, information reproduction data for determining key information corresponding to each data in the data recording area is recorded together with data such as video / audio data and still image data. On such a removable recording medium 115, the copy control information can also be recorded in the management area at once.

FIG. 13 shows another example of a preferable data structure of the recording medium of FIG. This recording medium is a recording medium (also referred to as a security removable medium) capable of copy control. In this copy control, management of a plurality of copies (also called copy number management, copy number control, number control copy) and / or copy generation management (copy generation management, copy generation control, generation control copy is also called. )including. One recording medium has both a normal area accessible to the user and a tamper-resistant area not accessible to the user. Confidential information stored in the tamper-resistant area can be accessed when authentication is confirmed by an authentication process with a device that can handle this recording medium, so that confidential information can be managed. It has become. The management area 301 in FIG. 12 is a tamper-resistant area, and the data recording area 30
2 corresponds to the normal area.

In the recording apparatus 100 shown in FIG. 10, a detachable recording medium 115 is shown in FIGS.
For example, the management information and program information related to copy control may be tampered with illegally, or recording media that cannot be copied (standards and so on are compatible with copy control). If the recording medium is not certified), the recording medium 1
When the digital data input from the input terminal 101 is recorded in 15 (non-secure recording medium), the control unit 111 stores the copy generation management information in the copy control information processing unit 203 as No-more-copies and the copyable number information. Record as 0.

<Recording reservation processing>
In this embodiment, it is considered that the user uses a remote controller or makes a recording reservation in the recording apparatus 100 using the operation unit 110 (the remote control receiving unit and the operation unit 110 are collectively referred to as an operation input unit). . The digital data input from the input terminal 101 is assumed to be a digital broadcast signal, for example. An example of steps for recording by the user is shown. For example, based on SI information created from a broadcasting station, the control unit 111 displays an electronic program guide on the screen. The user selects a program to be recorded by looking at the electronic program guide. When the user selects, the control unit 111 generates recording reservation information from the information of the corresponding program and records it in the nonvolatile memory 112. When the broadcast time of the corresponding program is actually reached, the control unit 111 confirms that the program starts according to the recorded recording reservation information, for example, by SI information (EIT information, etc.). To start. If they do not match, the recording is stopped or the recording reservation information is updated and postponed.

In order to perform reserved recording, the present invention is not limited to this example, and it is also possible for the user to directly specify information necessary for recording, such as date and time and channel, and perform recording.

  At this time, for example, if the SI_information includes digital_recording_control_mode information in the content usage descriptor or one-to-one copy control information, the copy generation management information at the time of recording determined from the information is recorded. Add to booking information. If it is not included, the copy control method can be included in the recording reservation information if the copy control method used for each broadcasting station is uniquely determined. Here, the copy generation management information will be described, but it can also be applied to copy number control information.

For example, when recording on a recording medium in which copy control information can be correctly managed, for digital broadcasting network data that only performs free broadcasting, if the value of digital_recording_control_data in the digital copy control descriptor is “one-generation copying is possible” The copy generation management information at the time of recording is determined as “number limited copy allowed”, and if “copying possible without restriction”, the copy control information at the time of recording is “copy available (but output protected)”. Determine. For digital broadcasting network data for pay broadcasting, if the value of digital_recording_control_data in the digital copy control descriptor is “one-generation copying is possible”, the copy control information at the time of recording is determined as “re-copying prohibited”, and “ If “copying is possible without constraint”, the copy control information at the time of recording is determined to be “copiable (but output protected)”. Alternatively, for example, when the input is digital data obtained by converting analog broadcasting, it may be determined that the copy control method is “copiable” regardless of the recording medium. By using the above method, it is possible to present the copy information of the recorded data to the user in advance and improve the convenience. In the case of a reservation in which the user directly specifies a date and time or a channel, there is a possibility that the program spans multiple programs. In this case, the SI information of the recording start time is acquired to determine the copy control method, or For example, it may be automatically divided into recording reservations for each program.

FIG. 14 is an example of a display screen showing recording reservation information in a list format when a user makes a recording reservation for a plurality of programs. The display screen is output from the display control unit and displayed on the display device.
Reference numeral 401 denotes a display screen. Reference numeral 402 denotes an area for displaying information. For example, program information such as the broadcast date / time, broadcast time, broadcast channel, recording mode, and program name of each reserved digital data is displayed. At this time, when a plurality of recording media are connected as in the recording apparatus 100, the recording medium of the recording destination may be displayed. Further, for example, the data capacity when the recording ends normally may be estimated and displayed.

In this embodiment, a copy control method (copy method) of recorded data is displayed in the display area 402. The copy control method to be displayed here is determined by the program to be recorded and the recording medium. More specifically, it is determined by the digital copy control descriptor information of the program, the content usage descriptor of the program or information corresponding to the descriptor, and the secure correspondence information of the recording medium.

  For example, if the copy generation management information of a recorded program is Copy-free, copying is possible regardless of the recording medium. In the program 1 shown in FIG. 14, since the program to be recorded can be copied, the copy information is displayed as “free”. If the recording medium is a non-secure recording medium, a plurality of copy generation management information of a recorded program cannot be copied. For example, in FIG. 14A, even if a plurality of copy generation management information of the program 4 to be recorded can be copied, the copy information column is “prohibited” because the recording destination is a non-secure compatible DVD. In addition to DVDs, HDDs may also be non-secure recording media). In this way, information indicating whether the copy control method of each digital data after recording is not possible or a plurality of copies is possible is displayed in a list from before recording.

The user can change information by performing a predetermined operation on the display screen using the remote controller or the operation unit 110.

  FIG. 26 shows an example of processing when the user changes the recording medium for recording after the reservation.

In S1601, the remote controller I / F 108 or the operation unit 110 notifies the control unit 111 of a signal indicating that the user has changed the recording destination column displayed in the display area 402. At this time, the control unit 111 may display the name of the recording medium designated by the user in the recording destination field.

In S1602, copy generation management information after recording is calculated from the digital copy control descriptor of the program to be recorded and the content usage descriptor or information corresponding to the descriptor in one-to-one correspondence.
Go to 03.

In S1603, if the result obtained in S1602 is “Copyable”, the process proceeds to S1604, and if not, the process proceeds to S1605.

In S1604, the control unit 111 changes the display of the copy information column of the reservation information whose recording destination has been changed by the user of the display area 402 to “free”, and proceeds to S1610. At this time, the display of the recording destination may be changed. In S1604, if the result obtained in S1602 is a status not permitting multiple copies, the process proceeds to S1606, and if multiple copies are permitted, S16 is performed.
Proceed to 07.

In step S <b> 1606, the control unit 111 changes the display of the copy information column of the reservation information in which the user of the display area 402 has changed the recording destination to “prohibited”, and the process advances to step S <b> 1610.

In S1607, if the recording target changed by the user is a recording destination that is always insecure, such as a DVD or Blu-ray disc, the process proceeds to S1608, and is always secure, such as a built-in HDD. Alternatively, if the recording destination can use both a secure compatible medium and a non-secure compatible medium as in the slot 114, the process advances to step S1609.

In S1608, the control unit 111 changes the display of the copy information column of the reservation information whose recording destination has been changed by the user of the display area 402 to “prohibited”, and proceeds to S1610.

In step S1609, the control unit 111 changes the display of the copy information column of the reservation information whose recording destination has been changed by the user of the display area 402 to “1 generation N pieces” (N is an arbitrary positive number), and the process advances to step S1610. However, if the copy generation management information allows finite and multiple generation copies, the display is changed according to the generation.

In step S <b> 1610, the control unit 111 updates the recording reservation information recorded in, for example, the nonvolatile memory 112 to reflect the change, and ends the process. When the user changes the recording destination to, for example, the slot 114, in S1609, for example, it is determined whether the recording medium actually mounted in the slot 114 is secure, and the update of the copy information column is changed to “1 generation N”. You may change whether to do or "prohibit".

For example, assuming that the receiving apparatus 3 is connected to a DVD as an external recording medium, FIG.
When the operation input for changing the recording destination of the program reserved for recording on the external DVD in FIG. 14B to be recorded on the built-in HDD as shown in FIG. The control unit 111 changes the copy control method after recording from prohibition to N (N is a positive number) copies after recording. As a result, when the user confirms the list, it is possible to examine the method of using and managing the data after recording, and it is possible to easily change the recording destination as necessary, and the convenience can be improved. .

Note that the order of the steps in FIG. 26 can be switched or selected. In addition, the control unit 11
1, the part that executes the functions described in FIG. 26 and FIGS. 17 and 18 to be described later is particularly called a recording reservation (recording reservation) information management unit (control unit).

Further, in the example of FIG. 14, the list is sorted and displayed in the order of recording date, but the display may be performed in other parameters, for example, in the order of long recording time or channel order. Further, only the recording reservation information may be displayed by restricting the broadcast station or the genre of the program.

FIG. 15 shows a screen display example when sorting is performed by the copy control method after recording. 5
01 indicates a display screen. Reference numeral 502 denotes an area for displaying a tag indicating a sorting method. Reference numeral 503 denotes an area for displaying a list of programs reserved for recording. The order of programs displayed at 503 changes according to the tag specified at 502. In the example of FIG. 15, since they are sorted according to the copy control method after recording, in 503, “copy free”, “N copies are possible”, “copy prohibited”,... As a result, the recorded program for each copy control information can be discriminated at a glance, and the display can be easily understood by the user. In particular, for example, when the capacity of a certain recording medium is full and the user saves it by copying it to another recording medium, it is easy to select which program is suitable for saving because it can be restored after copying. Of course, the method for switching the items to be sorted is not limited to the example of the tag shown in FIG. 15. For example, the same effect can be obtained by assigning designation of the sorting method to an arbitrary button of the remote controller.

  If the SI_information does not include digital_recording_control_mode information in the content usage descriptor or information on copy control corresponding to the content usage descriptor, information indicating that copying can be performed N times cannot be displayed. Display in a bundle.

FIG. 16 shows an example of a copy control information recording area 601 held in an area where information can be concealed when recording is performed on the recording medium 105 or the removable recording medium 115. 60
2 shows a program ID indicating one group of digital data. The unit of grouping is, for example, the range from the beginning to the end of the broadcasted program or the same copy control information in the same program. Reference numeral 603 denotes the date and time when the program and copy control information were recorded. Reference numeral 604 denotes address information indicating where on the recording medium the corresponding data is recorded. Reference numeral 605 denotes copy generation management information of the corresponding digital data. Reference numeral 606 denotes information on the number of copies of the corresponding digital data.

As described above, according to the configuration shown in FIG. 1, the removable recording medium 115 inserted into the slot 114 can record the copy control information as shown in FIG. Medium) and a non-secure recording medium (hereinafter referred to as a non-secure recording medium) can be mounted. Therefore, I want to record 1 copy of copy control information after recording on a secure compatible recording medium, but in reality, a non-secure compatible recording medium is mounted, so the status is incapable of copying. It may be recorded.

FIG. 17 is a flowchart illustrating an example of processing in the case where processing is changed according to the secure state of the removable recording medium 115 when recording is performed.

In S701, it is confirmed whether the removable recording medium 115 is a secure recording medium, and the process proceeds to S702.

In S702, if the confirmation result in S701 is secure, the process proceeds to S703, and if not secure, the process proceeds to S704.

In S703, data is recorded on a removable recording medium as reserved, and the accompanying copy control information is recorded in such a manner that one generation can be copied, and the process proceeds to S705.

In S704, the data is recorded on the built-in recording medium, and the copy control information is recorded as being copyable 1 generation N times, and the process proceeds to S705. This is a case where the built-in recording medium is a secure recording medium. When there is a possibility that the built-in recording medium is also a non-secure-compatible recording medium, the processing of S805, 806, 807, 809, and 810 in FIG. 18 described later is executed (not built-in in S807 and S810). Or may be recorded on a removable recording medium).

In step S705, the control unit 111 deletes and updates the information executed from the scheduled recording information, updates the scheduled recording execution result information by adding the current recording execution result, and ends the process. Control unit 111
Records the scheduled recording execution result information in the nonvolatile memory 112.

With this processing, it is possible to prevent usability from being lowered by recording data with copy control information that does not match the user's intention.

In addition, when the user uses the receiving device 3 at the start of recording, since a recording medium that is not secure is mounted immediately before recording (for example, at a fixed timing such as three minutes before), a plurality of recording devices are recorded. It may be possible to notify the user that the individual copy is not possible and to promote replacement of the removable recording medium. In this way, the user can add desired copy control information and record it on a removable recording medium.

In addition, it is conceivable to detect that recording cannot be executed when the internal recording medium 105 has no free space before recording starts and to record on the removable recording medium 115 instead.
However, in this case, recording is performed with a copy control method different from the copy control method depending on whether the removable recording medium 115 is secure or not. For example, if the detachable recording medium 115 is a secure recording medium, even if the recording destination is changed, the copy control method after recording can copy one generation multiple copies, while the non-secure recording medium can be used. For example, the copy control method after recording makes it impossible to copy a plurality of copies. There is an advantage that the program can be recorded until the end of the program. Further, when the copy control method is different from that at the time of reservation, notification of the change can be prevented by notifying the user.

FIG. 18 shows a flowchart of such a processing example. In particular, if recording that allows multiple copies set by the user cannot be performed for some reason (capacity is insufficient, not installed, etc.), recording that allows multiple copies is performed as much as possible after recording.

In step S801, it is first checked whether there is a free space in the built-in recording medium 105, and in step S802.
Proceed to

In S802, if there is no free space as a result of the investigation in S801, the process proceeds to S804. If there is free space, the process proceeds to S803.

  In S803, recording is performed on the recording medium 105, and the process proceeds to S808.

In step S804, it is confirmed whether the removable recording medium 115 is a secure recording medium.
Proceed to If it has already been confirmed before the start of recording, this step may be omitted. In S805, S
If the confirmation result of 804 is secure, the process proceeds to S806. If the confirmation result is not secure, S807 is performed.
Proceed to If there are a plurality of detachable recording media, it is confirmed whether there is a recording medium that can be secured and can be recorded. If recording is possible, the process moves to S806 for the removable recording medium that can be secured.

  In S806, recording is performed on the removable recording medium 115, and the process proceeds to S809.

In S807, the copy generation management information is set as “copy prohibition (copy never)” as the copy control information, the copyable number information is set to 0, and recording is performed on the removable recording medium 115, and S810 is performed.
Proceed to In step S808, the recording reservation information is updated by deleting information corresponding to the current recording, the recording execution result information is updated by adding information corresponding to the current recording, and the process ends.

In S809, the recording reservation information is updated by deleting the information corresponding to the current recording, and the information corresponding to the current recording is added to the recording execution result information (however, if successful, for example, the processing result is set to “substitute” If the process fails, the process result is set to “failure”) and the process is terminated.

In S810, the recording reservation information is updated by deleting the information corresponding to the current recording, and the information corresponding to the current recording is added to the recording execution result information (however, if successful, for example, the processing result is set to "substitute" If the process fails, the process result is set to “failure” and information indicating that the copy information has been changed since the reservation is added), and the process ends.

Note that, in the processes of S801 and S802, when the standard of the data amount to be reserved recording is known, the determination process may be performed by comparing the standard data amount with the free space of the recording medium 105. .

Further, regarding the processing from S804, when a plurality of recording media are connected to the receiving device 3, the same confirmation is performed for all the connected recording media, and a secure processing compatible recording medium is found. You may perform the process which records on a corresponding recording medium, without changing copy control information. When all the recording media are not secure, for example, the recording may be performed by changing the copy control information to a recording medium having the largest free space. With the above processing, it is possible to perform recording without changing the copy control method as much as possible, and to prevent the convenience after recording from being deteriorated.

As another example, if the user is using the receiving device 3 immediately before the recording is started (for example, a certain time such as 3 minutes before or 5 minutes before the start of recording), the recording is attempted to be performed. It may be notified that there is not enough free space on the recording medium, and the deletion is prompted. As a result, it is possible for the user to notice the necessity of deleting unnecessary data from the recording medium in order to record in a state where a plurality of copies can be made after recording.

It is also possible to execute both FIG. 17 and FIG. 18. For example, prior to FIG. 17 and FIG. 18, a step of determining whether the recording medium reserved for recording is built-in or detachable is provided. FIG. 18 may be executed in the case of being built-in, and FIG. 17 may be executed in the case of being detachable.

  In addition, the order of the steps in FIGS. 17 and 18 can be switched or selected.

<Display process after recording>
FIG. 19 is an example of a display screen that displays the scheduled recording execution result information in a list format after recording. Information such as date, recording time, recorded program name, recording destination, and the like is displayed as information displayed in the recording reservation list, and an execution result such as “success” or “failure” is displayed next to the information. For example, when recording is performed on a recording medium that is different from the recording medium scheduled as in S704 in the sequence of FIG. 17, “substitute” is displayed in the execution result column. For example, as shown in the sequence of FIG. 18, the copy generation management information after recording cannot be copied a plurality of times, for example, by displaying an icon. For example, when the user selects this icon, a more detailed message is displayed as shown in FIG. When the user confirms the message, the above icon may be hidden.

FIG. 20 shows an example of a message to be displayed. Reference numeral 1001 denotes an example of a message to be displayed. Reference numeral 1002 denotes a button that the user selects for confirmation. Thus, the user can easily determine that the recorded data has been recorded with the copy control information in the copy prohibition status. This message is not limited to being displayed when displaying a list, but may be during recording, when power is turned on after recording, or when recorded data is selected.

FIG. 21 is an example of a display screen that displays the digital data recorded in the recording medium in a list format classified for each copy control information.

In FIG. 21A, reference numeral 1101 denotes a display screen. Reference numeral 1102 denotes an area for displaying the name of the recording medium for displaying the list. For example, when a plurality of recording media are connected to the receiving device 3, the same number of tags as the number of connected recording media are displayed in the area 1102. At this time, the tag of the recording medium corresponding to the plurality of copies is colored and displayed so that the user can intuitively determine which recording medium corresponds to the plurality of copies. In the example shown in FIG. 21, the HDD 1 is not compatible and the HDD 2 is compatible. In 1103, for example, the classification of digital data such as a folder name is displayed. Reference numeral 1104 denotes an area for displaying a list of data corresponding to the classification designated by 1103 from the digital data recorded on the recording medium designated by 1102. For example, the user performs “all” in 1103 classification by a predetermined operation.
Is selected, the data recorded on the recording medium is sequentially displayed on 1104. When “Folder 1” is designated, only the data previously classified into the folder by the user is displayed on 1104.

Thereby, even when there are a plurality of detachable recording media, the user can immediately know which media corresponds to the plurality of copies and the convenience is improved.

In FIG. 21B, in 1105, instead of displaying the classification based on the folder name in 1103, the classification based on the copy generation management information is displayed. At this time, 1104 displays a list of data corresponding to the copy generation management information specified in 1105. For example, if the user selects “copy free” in the classification 1105 by a predetermined operation, only data whose copy generation management information is Copy-free is displayed in 1104 and “copy once possible” (even if one copy generation is possible) If “Yes” is selected, data whose copy generation management information is Copy-one-generation is displayed in 1104. At this time, the copy generation management information is No-more-copies and the number of copies that can be copied is a positive number is displayed with the classification of “Copy once possible”, or the copy generation management information is Copy-one-generation and the copy Data for which the possible number is 0 may be displayed with a classification of “copy prohibited”. When displaying, the information on the number of copies of each data may be displayed together with the data name.

For example, when a recording medium corresponding to a plurality of copies is selected, the user performs a predetermined operation using the remote controller or a predetermined operation using the operation unit 110 by the control unit 111.
Switches between the display using the folder structure classification shown in FIG. 21A and the display using the classification for each copy control information shown in FIG.

By displaying a list of recorded programs when multiple secure / non-compliant recording media are mixed as described above, digital data corresponding to copy control information can be easily grasped, and user convenience is improved. Is possible.

Alternatively, the same effect can be obtained even if each program is displayed in different colors according to the copy control information. For example, it is possible to display a program that allows multiple copies, a program that is copy-free, and a program that is prohibited to copy in different colors, or add a color when the number of copies that can be approached is zero.

<Receiver (2)>
FIG. 22 shows a configuration of a recording apparatus 1200 that includes two input terminals and a receiving unit, and that can input two digital data at the same time. 1201 is an input terminal equivalent to 101. 120
Reference numeral 2 denotes a receiving unit equivalent to 102. 102 and 1202 are parts to be demultiplexed.
It is good also as a structure which isolate | separates from and shares. Reference numeral 1203 denotes a recording / playback control unit equivalent to 104. Reference numeral 1204 denotes a switch, and the control unit 111 selects which of the recording medium 105 and the slot 114 is to be connected.

With the above configuration, for example, the same program can be recorded on the same recording medium simultaneously with respect to two input signals, and two recorded data are generated. In this case, if the number of copies of the two recorded data is N, the total number of copies is 2 × N.

FIG. 23 is an example of a display screen showing recording reservation information in a list format when the user sets reservations for recording the same program on the same recording medium. Reference numeral 1301 denotes a display screen. 130
2 indicates an area for displaying information. For example, when a copy control method after recording of each reservation is indicated,
The total number of copies that can be made when the same program is recorded on the same recording medium is displayed as 2N. Alternatively, it may be possible for the user to switch whether to display in total or individually by a predetermined operation.

FIG. 24 is an example of a display screen that displays digital data recorded in a recording medium in a list format when the user records the same program on the same recording medium. Reference numeral 1401 denotes a display screen. Reference numeral 1402 denotes an area for displaying the name of a recording medium on which a list of recorded data is to be displayed. Reference numeral 1403 denotes an area for displaying a classification of digital data such as a folder name. 140
Reference numeral 4 denotes an area for displaying a list of data corresponding to the classification designated by 1403 from the digital data recorded on the recording medium designated by 1402. For example, when copy control information is displayed together and the same program is recorded multiple times, it is displayed to the user as if it were one piece of data. Is displayed. As a result, the user manages the duplicated programs as one, and the usability can be improved.

FIG. 25 shows an example of a display screen showing the free capacity of each recording medium when a plurality of recording media are loaded in the receiving apparatus 3. Reference numeral 1501 denotes a display screen. For example, a user performs a predetermined operation while viewing broadcast data, and a screen for checking the remaining amount of the recording medium is displayed on a part of the display screen 1501. This is an area for displaying the name of each recording medium connected to 1502. A recording medium that supports multiple copies is displayed with a color. FIG. 25A shows an example in which the HDD 1 does not support multiple copies and the HDD 2 supports multiple copies. Reference numeral 1503 denotes a free capacity. For each recording medium, an indication of the recordable time in each recording mode is displayed. In FIG. 25B, a list of the free capacity of each recording medium is displayed in 1504 in the data size. An example is shown in which HDD1 does not support multiple copies and HDD2 supports multiple copies. As a result, when a plurality of recording media can be used, the user can immediately know which medium is compatible with a plurality of copies and the convenience is improved.

DESCRIPTION OF SYMBOLS 1 ... Transmission apparatus 2 ... Relay apparatus 3 ... Reception apparatus 11 ... Source generation part 12 ... Encoding part 13 ... Scramble part 14 ... Modulation part 15 ... Transmission antenna 16 ... Management information provision part 10
, 100, 1200 ... recording device 101, 109, 202, 207, 1201 ... input terminal 102, 1201 ... receiving unit 103 ... image / audio signal processing unit 104, 1203 ... recording / playback control unit 105 ... recording medium 106 ... display control unit 107, 206, 210, 120
3, 1302 ... Output terminal 108 ... Remote control interface 110 ... Operation unit 111 ...
Control unit 112 ... Non-volatile memory 113 ... System bus 201 ... Input / output terminal 203
... Copy control information processing unit 204 ... Encryption unit 205 ... Recording control unit 208 ... Reproduction control unit
209 ... Decoding unit 114 ... Slot 115 ... Removable recording medium 116, 1204 ...
switch

Claims (2)

  In a digital content transmission / reception system that transmits digital content from a transmission device and receives the digital content in a reception device,
  The transmitter is
  A digital content in a transport stream format is generated, and a first control descriptor including copy control information for controlling copying of the digital content and a second control control mode information are included in a program map table of the generated digital content. A content generation unit for arranging control descriptors of
  A transmission unit for transmitting the digital content generated by the content generation unit,
  The copy control mode information is information indicating whether or not the received digital content is a content that can be copied in a limited number when the copy control information indicates a one-generation copy enabled state;
  The number-limited copyable content is content that can generate up to a predetermined number of copies,
  The receiving device is:
  A receiving unit for receiving the transmitted digital content;
  A storage unit for storing the received digital content in a recording medium built in the receiving device;
  A recording unit for recording the received digital content on a removable recording medium;
  A control unit that controls the storage unit and the recording unit according to the received copy control information and copy control mode information of the digital content;
  The control state of the control unit is:
  When the copy control information is capable of one-generation copying, and the removable recording medium does not support recording of content that can be copied with a limited number, the copy control mode information of the received digital content can be copied with a limited number of copies. A first state in which the received digital content is recorded on the removable recording medium in the form of a one-generation copyable content,
  When the copy control information is one-generation copyable and the copy control mode information indicates that the digital content is not content that can be copied in a limited number, the received digital content is stored in the built-in recording medium. The second state of storing
  A digital content transmission / reception system comprising:   In a digital content transmission / reception method for transmitting digital content from a transmission device and receiving the digital content in a reception device,
  Transmission from the transmitter is
  A digital content in a transport stream format is generated, and a first control descriptor including copy control information for controlling copying of the digital content and a second control control mode information are included in a program map table of the generated digital content. A content generation step for arranging control descriptors of
  Transmitting the digital content generated in the content generation step,
  The copy control mode information is information indicating whether or not the received digital content is a content that can be copied in a limited number when the copy control information indicates a one-generation copy enabled state;
  The number-limited copyable content is content that can generate up to a predetermined number of copies,
  Reception in the receiving device is
  A receiving step for receiving the transmitted digital content;
  The received digital content is stored in a recording medium built in the receiving device, or recorded on a removable recording medium, and a recording step is provided.
  The recording step includes
  When the copy control information is capable of one-generation copying, and the removable recording medium does not support recording of content that can be copied with a limited number, the copy control mode information of the received digital content can be copied with a limited number of copies. A first state in which the received digital content is recorded on the removable recording medium in the form of a one-generation copyable content,
  When the copy control information is one-generation copyable and the copy control mode information indicates that the digital content is not content that can be copied in a limited number, the received digital content is stored in the built-in recording medium. The second state of storing
  A digital content transmission / reception method comprising:

Images