JP2008177962A - Content recording system, terminal, recording apparatus, content recording method, computer program for terminal and computer program for recording apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide restriction for allowing a terminal which is a remote recording reservation request source to reproduce copy of content data recorded by a recording and reproducing apparatus according to a remote recording reservation request from a terminal. <P>SOLUTION: Each time the terminal 500 transmits the remote recording reservation request of the content data to the recording and reproducing apparatus 600, the terminal 500 transmits an event ID and an equipment ID which are encryption keys for encrypting the content data. The recording and reproducing apparatus records the content data based on the remote recording reservation request. The recording and reproducing apparatus, when copy of the recorded content data is taken out to the outside, encrypts the content data by the encryption keys to create copy of the content data. The terminal acquires copy of content data encrypted by the recording and reproducing apparatus and releases the content data using the encryption keys. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a content recording system, a terminal device, a recording device, a content recording method, a computer program for the terminal device, which can be reserved from a terminal device through a network so as to record content data in a recording device such as a recording device, And a computer program for a recording apparatus.

  In recent years, broadcasting programs such as terrestrial analog television broadcasting, terrestrial digital television broadcasting, CS digital broadcasting, BS digital broadcasting, and so-called “net programs”, which are contents provided from program distribution services and sites on the Internet, are targeted. A service for providing an electronic program guide (EPG) has become widespread.

  In addition, as another service linked with a content guide such as EPG, content such as a broadcast program selected in the content guide displayed on the display of the terminal device is recorded by a recording device connected to the network. A remote recording reservation service for reserving an image is known. When receiving a remote recording reservation request from a terminal device via a network, the server that performs this remote recording reservation service records a recording target for a recording device such as a recording device that has been previously associated with the terminal device. For example, recording reservation information such as channel name, broadcast date, broadcast start / end time, title name, etc. is transmitted. The recording device receives a broadcast program based on the recording reservation information received from the server and records it in the recording device (see, for example, Patent Document 1).

By the way, there is a usage form in which content data recorded in a recording device such as a recording device is moved or copied to another device through a recording medium or a transmission medium, and the content data is reproduced on the other device. When considering the usage form of such content data, when the content is a copyrighted work, various technologies and data handling arrangements have been formulated from the viewpoint of copyright protection to prevent duplication. One of them is a standard called Secure Digital Initiative (SDMI). In this SDMI, storage in a storage medium is performed in an encrypted content state, and transmission for movement / copying is also performed in an encrypted state. In addition, when moving or copying, contrivances such as permission / denial management are performed according to the number of times and other conditions, and the handling of content data is copyright protection and the benefit of general users (private users). In consideration of the right of reproducible reproduction).
JP 2001-309285 A

  However, in the system configuration in which the remote recording reservation request is transmitted from the terminal device to the recording device, and the recording device receives the remote recording reservation request and records the content such as a broadcast program, the above-mentioned When general content data movement restrictions and copy restrictions are set, the same restrictions apply when moving and reproducing a copy of content data recorded on the recording device to the terminal device that is the remote recording reservation request source Therefore, there is a problem that convenience for a user who wants to reproduce and enjoy content data on the terminal device is impaired. Also, with the current copyright protection mechanism, content data can be taken out if the terminal device clears this mechanism, and a restriction is imposed that “only the terminal that made the reservation request can use the content”. I couldn't.

  In view of such circumstances, the present invention provides a content recording system capable of providing a restriction that a copy of content data recorded in a recording device based on a reservation request from a terminal device can be taken out only to the terminal device that is the reservation request source. An object is to provide a terminal device, a recording device, a content recording method, a computer program for the terminal device, and a computer program for the recording device.

  In order to solve the above problems, a content recording system according to the present invention is a content recording system in which a terminal device and a recording device can be connected via a network, and the terminal device acquires content data from the recording device. A reservation processing unit that transmits a reservation request for reserving the content data and an encryption key for encrypting the content data through the network, and a decryption that decrypts the encrypted copy of the content data obtained from the recording device with the encryption key The recording device includes a content data acquisition unit that acquires the content data based on the reservation request, a content data storage unit that stores the content data acquired by the content data acquisition unit, The content data stored in the content data storage unit Characterized by comprising the encryption unit for encrypting at the encryption key acquired from the terminal device to create a duplicate of the content data.

  According to the present invention, when the recording device creates a copy of the content data acquired according to the reservation request from the terminal device, the recording device encrypts the content data using the encryption key acquired from the terminal device that is the reservation request source. Since the copy is created, the encryption of the copy of the content data can be released only to the terminal device that provides the encryption key used for encrypting the content data, that is, the terminal device that is the reservation request source. It can be limited.

  In the present invention, the encryption key includes a device ID unique to the terminal device, thereby preventing unauthorized reproduction of content data duplication by impersonation by another terminal device. In addition, when the encryption key includes an ID unique to each reservation request in addition to an ID unique to the terminal device, content data is charged in a case where charging is performed for each content data reservation request. Restrictions can be placed on taking copies in units.

  Further, in the present invention, the terminal device transmits a reproduction command including the encryption key to the recording device, and the recording device transmits the encryption key acquired by the encryption key acquisition unit to the content data stored in the content data storage unit, The encryption key storage unit to store in association with the reproduction command including the encryption key transmitted from the terminal device is input, the encryption key included in the reproduction command is compared with the encryption key stored in the encryption key storage unit, It may further comprise a reproduction processing unit that reproduces the content data associated with the matched encryption key. Thus, in order to reproduce the content data recorded in the recording device in accordance with the reservation request from the terminal device, a restriction is imposed that a reproduction command from the terminal device that is the reservation request source is required. be able to.

  According to the present invention, it is possible to provide a restriction that reproduction of a copy of content data recorded in a recording device based on a reservation request from a terminal device can be performed only by the terminal device that is the reservation request source.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an overall configuration of a content recording system 10 according to an embodiment of the present invention.

  The content recording system 10 includes a content guide distribution server 100, a content distribution server 200, a service server 300, a direct access management server 400, a terminal device 500, and a recording device 600, which are connected via a network 1 such as the Internet. Connection is possible so that they can communicate with each other. The server device described in the claims of the present invention corresponds to the service server 300 and the direct access management server 400 in this embodiment.

  The content distribution server 200 is a server that distributes content data D1 such as video and audio via the network 1 by IP multicast broadcasting, a VoD (Video on Demand) method, or the like. Note that a plurality of content distribution servers 200 may be connected to the network 1.

  The content guide distribution server 100 broadcasts content data D1 distributed from the content distribution server 200 and content data D2 such as broadcast programs broadcast from the broadcast station 3, etc., information necessary for recording reservation, download, etc. When content guide data including information necessary for reservation is stored and a content guide acquisition request R2 is received from the terminal device 500 connected to the network 1, the content guide is acquired by the terminal device 500 via the network 1. It is a server that distributes content guide data as a response R3. Information necessary for recording reservation includes, for example, content code, channel name, broadcast date, broadcast start / end time, title name, etc. Information necessary for download reservation includes, for example, content code, There is a URL (Uniform Resource Locator) of the download source.

  Upon receiving the remote recording reservation request R14 from the terminal device 500, the service server 300 receives content data D1 distributed from the content distribution server 200 by IP multicast broadcast or content data D2 such as a broadcast program broadcast from the broadcast station 3. In response to the remote recording reservation service R14 ′ from the terminal device 500, the recording device 600 receives the content data D1 provided by the content distribution server 200 using the VoD method. This server provides a remote download reservation service so that it can be downloaded and recorded.

  The direct access management server 400 manages the combination of the service provided by the terminal device 500 and the service server 300 and the correspondence between the recording device 600 and the service server 300 directly to the recording device 600 via the network 1. It is a server that performs processing related to transmission and reception of information necessary for access. In this embodiment, since the service server 300 provides a plurality of types of services such as remote recording reservation and remote download reservation from the terminal device 500 to the recording device 600, the direct access management server 400 includes at least the terminal A correspondence relationship between the combination of the device 500 and the remote recording reservation service and the recording device 600, a correspondence relationship between the combination of the terminal device 500 and the remote download reservation service and the recording device 600, and the like are managed.

  The terminal device 500 transmits a content guide acquisition request R2 to the content guide distribution server 100 via the network 1, receives and displays the content guide data as the content guide acquisition response R3 from the content guide distribution server 100, and is displayed. It is possible to transmit to the service server 300 a remote recording reservation request R14, a remote download reservation request R14 ', and the like of the content selected by the user in the content guide.

  The recording device 600 receives the remote recording reservation command, and selectively receives and records the content data D1 distributed from the content distribution server 200 and the content data D2 broadcast from the broadcasting station 3, or remote download reservation It is possible to receive a command and download and record content such as a VoD program stored in the content distribution server 200.

  The content guide distribution server 100, the content distribution server 200, the service server 300, and the direct access management server 400 are all configured by a typical computer system such as a personal computer as shown in FIG.

  That is, a CPU (Central Processing Unit) 101 is connected via a system bus 109 to a ROM (Read Only Memory) 102, a RAM (Random Access Memory) 103, a network connection unit 104, a keyboard, a mouse, and the like. Unit 105, a display made up of CRT (Cathode Ray Tube), LCD (Liquid Crystal Display), etc., an output unit 106 made up of speakers, etc., a media interface unit 107, and a storage unit 108 made up of a hard disk drive, nonvolatile memory, etc. And are connected.

  The network connection unit 104 is a unit that performs communication processing via the network 1. The storage unit 108 stores a program for software processing, various data, and the like. In order to execute software processing, the CPU 101 loads a program from the storage unit 108 to the RAM 103, interprets it, and executes it. A removable medium 2 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory is appropriately attached to the media interface unit 107, and a program read from the removable medium 2 is installed in the storage unit 108 as necessary.

  Next, the software configuration of the service server 300 will be described with reference to FIG. The service server 300 includes a reservation processing unit 301.

  When receiving the remote recording reservation request R14 from the terminal device 500, the reservation processing unit 301 instructs the direct access management server 400 to associate the recording device associated with the combination of the terminal device 500 and the remote recording reservation service. A direct access start request R15 for requesting acquisition of a direct access URI, which is information necessary for the service server 300 to directly access the network 1 through the network 1, is transmitted to the server 600, and the direct access management server 400 receives the direct access. Receiving the direct access start response R18 including the URI for use, accessing the recording device 600 based on this response and transmitting the remote recording reservation command R19. After the recording reservation in the recording device 600 is completed, the remote recording from the recording device 600 is performed. Reservation result notification R Receives the 1, further transmits the remote recording reservation result notification R22 to the terminal device 500.

  When the reservation processing unit 301 receives a remote download reservation request R14 ′ from the terminal device 500, the reservation processing unit 301 associates the direct access management server 400 with the combination of the terminal device 500 and the remote download reservation service. A direct access start request R15 for requesting acquisition of a direct access URI, which is information necessary for the service server 300 to directly access the recording device 600 via the network 1, is transmitted from the direct access management server 400. The direct access start response R18 including the direct access URI is received, the recording device 600 is accessed based on this response, a remote download reservation command R19 ′ is transmitted, and recording is performed after the download reservation in the recording device 600 is completed. The remote download reservation result notification R21 ′ is received from the device 600, and further the remote download reservation result notification R22 ′ is transmitted to the terminal device 500.

  Next, the software configuration of the direct access management server 400 will be described with reference to FIG. The direct access management server 400 includes a control device / service / controlled device management ID storage unit 411, a registration processing unit 412, and a direct access request processing unit 413.

  The control device / service / controlled device management ID storage unit 411 includes a control device / service management ID, which is an ID assigned to the combination of the terminal device 500 serving as the control device and the service of the service server 300, and the controlled device. A controlled device management ID, which is an ID assigned to the recording device 600 as a control device, is stored in association with each other.

  The registration processing unit 412 registers the control device / service management ID and the controlled device management ID in the control device / service / controlled device management ID storage unit 411 and associates both IDs. That is, for example, in response to a control device / service registration request R23 from the service server 300, the registration processing unit 412 assigns a control device / service management ID to the combination of the service provided by the terminal device 500 and the service server 300. The control device / service management ID is generated and registered in the control device / service / controlled device management ID storage unit 411 and transmitted to the service server 300 via the network 1. In this embodiment, since the service server 300 provides at least two services of remote recording reservation and remote download reservation, a control device / service management ID indicating a combination of the terminal device 500 and the remote recording reservation service, A control device / service management ID indicating a combination of the terminal device 500 and the remote download reservation service is generated. Note that the present invention can also be applied to the case where one of two services of remote recording reservation and remote download reservation is provided.

  Further, the registration processing unit 412 generates different controlled device management IDs for the recording devices 600 in response to the controlled device registration request R24 from the recording device 600, and corresponds to the control device / service management ID. At the same time, it is stored in the control device / service / controlled device management ID storage unit 411 and transmitted to the recording device 600 via the network 1. Here, as a method for determining which control device / service management ID is associated with the controlled device management ID, there is a method of using a password for registering the controlled device, as shown below.

  In this method, after the control device / service management ID is registered in the direct access management server 400, the service server 300 requests the direct access management server 400 to issue a password for registering the controlled device. Upon receiving this request, the direct access management server 400 generates a controlled device registration password, stores it in association with the control device / service management ID, and transmits it to the service server 300. The service server 300 transmits a controlled device registration password to the terminal device 500. The terminal device 500 transfers the acquired password for registering the controlled device to the recording device 600 using the optical communication unit 511 (see FIG. 5). The recording apparatus 600 adds a controlled device registration password to the controlled device registration request R24 and transmits it to the direct access management server 400. Upon receiving the controlled device registration request R24, the direct access management server 400 generates a controlled device management ID, and also includes a controlled device registration password included in the controlled device registration request R24, and the controlled device / service. The controlled device registration password stored in association with the management ID is compared. If they match, the control device / service management ID associated with the matched controlled device registration password is The control device / service / controlled device management ID storage unit 411 stores the control device in association with the generated controlled device management ID.

  When receiving the direct access start request R15 including the control device / service management ID from the service server 300, the direct access request processing unit 413, the control device / service management ID included in the direct access start request R15, the control device / service management ID, Control device / service management included in the direct access start request R15 with reference to the contents of association between the control device / service management ID and the controlled device management ID stored in the service / controlled device management ID storage unit 411 Necessary for determining the controlled device management ID linked to the ID and allowing the service server 300 to directly access the recording apparatus 600 via the network 1 via the network 1 for the corresponding recording apparatus 600. URI (Unifor for direct access) A direct access information acquisition request R16 for requesting acquisition of a Resource Identifier), receiving a direct access information acquisition response R17 including the direct access URI from the recording device 600, and sending the direct access URI to the service server 300. Including a direct access start response R18.

  Here, the direct access URI is, for example, the global IP address and port number mapped to the local IP address and port number of the recording device 600 in the router when the recording device 600 is connected to the network 1 through the router. Consists of. However, when the recording apparatus 600 is directly connected to the network 1, the global IP address assigned to the recording apparatus 600 may be used.

  Further, the direct access management server 400 is provided with an XMPP (Extensible Messaging and Presentation Protocol) server 414 for setting a bidirectional always-connected session with the recording apparatus 600. XMPP is a protocol for realizing real-time communication. The always-on session is set when the recording device 600 logs into the XMPP server 414 before the terminal device 500 accesses the recording device 600 via the network 1. When the direct access management server 400 receives the direct access start request R15 from the service server 300 in which the XMPP session is established with the XMPP server 414, the direct access management server 400 is established between the XMPP server 414 and the recording device 600. The direct access information acquisition request R16 is transmitted to the recording apparatus 600 through the always-on session.

  Next, the terminal device 500 will be described. FIG. 5 is a block diagram illustrating a hardware configuration of the terminal device 500. As shown in the figure, the CPU 501 has a ROM 503, a RAM 504, an input operation unit 505, a display unit 506, an audio output unit 507, a network connection unit 508, and a decoding unit 509 via a system bus 502. The broadcast receiving unit 510, the optical communication unit 511, the storage unit 512, the encoding unit 513, the card interface unit 514, and the USB interface unit 515 are connected.

  The input operation unit 505 includes various keys and processes various commands and data input from the user. A command input from the user by the input operation unit 505 is supplied to the CPU 501 through the system bus 502 by an input interface unit (not shown).

  The display unit 506 includes, for example, a display such as an LCD and a display control circuit that drives the display, and displays, for example, a content guide acquired from the content guide distribution server 100. The audio output unit 507 includes a circuit that converts a digital audio signal into an analog audio signal, a speaker, and the like.

  The network connection unit 508 processes a wired or wireless connection with the network 1. The broadcast receiving unit 510 receives broadcast waves distributed from each broadcasting station 3 such as terrestrial analog television broadcast, terrestrial digital television broadcast, CS digital broadcast, BS digital broadcast, and terrestrial digital television broadcast for portable devices. Receive and demodulate video and audio signals.

  The decoding unit 509 decodes the encoded data of the program read from the storage unit 512 and restores digital video data and digital audio data. The restored digital video data is supplied to and displayed on the display unit 506 through the system bus 502, while the digital audio data is supplied to the audio output unit 507 through the system bus 502 and output as sound from the speaker.

  The optical communication unit 511 is an interface for processing communication with an external device such as the recording apparatus 600. Specifically, the optical communication unit 511 performs communication with an external device using light such as infrared rays as a wireless medium. is there. In addition to light, other wireless media such as radio waves, sound waves, and electromagnetic waves may be used. Communication with the recording device 600 may be performed via the network 1 in addition to optical communication.

The encoding unit 513 encodes the video signal and audio signal of the broadcast program output from the broadcast receiving unit 510 using, for example, the MPEG2 (Moving Picture Experts Group 2) method.

  The storage unit 512 stores content guide data acquired from the content guide distribution server 100 via the network 1, a remote recording reservation created by the terminal device 500 itself, a reservation list for remote download, and the like. The storage unit 512 can also store broadcast program data received by the broadcast receiving unit 510 and encoded by the encoding unit 513.

  The card interface unit 514 is an interface for reading / writing data such as encrypted program data from / to the storage medium 6 such as a memory card equipped with a semiconductor memory. The USB interface unit 515 is an interface for transferring data such as encrypted program data with an external device such as the recording device 600.

  The ROM 503 is a read-only memory in which programs and data for software processing to be executed by the terminal device 500 are permanently stored. Note that the program may be stored in the storage unit 512. The RAM 504 is a writable volatile memory used for loading a program code to be executed by the CPU 501 and writing work data of the program. The CPU 501 performs overall control of the above-described units and controls data exchange between the units. In addition, the CPU 501 loads a program from the storage unit 512 or the ROM 503 to the RAM 504, interprets and executes it in order to execute software processing to be executed by the terminal device 500.

Next, the software configuration of the terminal device 500 will be described with reference to FIG.
As shown in the figure, the terminal device 500 includes a content guide data acquisition unit 521, a content guide data storage unit 522, a content guide display processing unit 523, a content data acquisition unit 524, a content data storage unit 525, a content playback unit 526, A reservation content selection unit 527, a reservation list display processing unit 529, a reproduction command processing unit 530, a reservation list storage unit 531, a reservation processing unit 532, and a decryption unit 533 are provided. The content guide data storage unit 522, the content data storage unit 525, and the reservation list storage unit 531 are set in the storage unit 512 or the RAM 504.

  The content guide data acquisition unit 521 transmits a content guide acquisition request R2 to the content guide distribution server 100 through the network 1, acquires content guide data distributed from the content guide distribution server 100 as a content guide acquisition response R3, The content guide data D3 is written in the guide data storage unit 522.

  The content guide display processing unit 523 performs processing for reading the content guide data D3 stored in the content guide data storage unit 522, creating display data D4 for the content guide screen, and displaying it on the display unit 506.

  The content data acquisition unit 524 is a content guide screen displayed on the display unit 506, and when the user inputs a content selection and viewing instruction R51 of the content using the input operation unit 505, the content data acquisition unit 522. Content data D1 sent from the content distribution server 200 via the network 1 by IP multicast broadcasting or the like, for example, terrestrial analog television broadcasting, terrestrial digital television broadcasting based on the content guide data D3 stored in Content data D2 such as broadcast programs sent on broadcast waves from each broadcasting station 3, such as CS digital broadcasting, BS digital broadcasting, terrestrial digital television broadcasting for portable devices, etc. The data storage unit 525 Content temporarily stored for reproduction data D1, D2.

  The content reproduction unit 526 reads out the content data D1 and D2 stored in the content data storage unit 525, decodes them using the decoding unit 509 (see FIG. 5), and restores digital video data and digital audio data. The video data R8 is output to the display unit 506 to display the content video, and the digital audio data R9 is output to the audio output unit 507 to output the content audio.

  The reserved content selection unit 527 stores content guide data when a user selects a content and inputs a remote recording reservation command R4 of the content using the input operation unit 505 on the content guide screen displayed on the display unit 506. Recording reservation information D5, which is information necessary for remote recording reservation of the selected content, is extracted from the content guide data D3 stored in the part 522, and the recording reservation information D5, A remote recording reservation request issuing command R5 including the event ID and the device ID of the terminal device 500 is given, and the recording reservation information D5 and the event ID are associated with each other and registered in the recording reservation list stored in the reservation list storage unit 531. .

  In addition, the reserved content selection unit 527 displays content when a user selects a content and uses the input operation unit 505 to input a remote download reservation command R4 ′ for the content on the content guide screen displayed on the display unit 506. Download reservation information D6, which is information necessary for remote download reservation of the selected content, is extracted from the content guide data D3 stored in the guide data storage unit 522, and the download reservation is stored in the reservation processing unit 532. Remote download reservation request issuance instruction R5 ′ including information D6, event ID, and device ID of terminal device 500 is given, and remote download stored in reservation list storage unit 531 in association with download reservation information D6 and event ID Reservation squirrel Register with

  Here, the event ID is a unique ID issued in the terminal device 500 for each remote recording reservation command R4 and remote download reservation command R4 ′ generated in the terminal device 500. The device ID is an ID for uniquely identifying the terminal device 500. This may be anything that can identify the terminal device 500, for example, an ID set in the ROM 503 or the storage unit 512 of the terminal device 500 at the time of product shipment, or an ID assigned from the service server 300. Also good.

  When receiving a remote recording reservation issuance command R5 from the reservation content selection unit 527, the reservation processing unit 532 sends the recording reservation information D5, the event ID, and the device ID of the terminal device 500 to the service server 300 via the network 1. The remote recording reservation request R14 including the remote recording reservation notification R21 is received from the content distribution server 200 and displayed on the display unit 506. When the reservation processing unit 532 receives a remote download reservation request issuance command R5 ′ from the reservation content selection unit 527, the reservation processing unit 532 transmits the download reservation information D6, the event ID, and the terminal device 500 to the service server 300 via the network 1. A remote download reservation request R14 ′ including the device ID of the remote download reservation is transmitted, a remote download reservation result notification R21 ′ is received from the content distribution server 200 and displayed on the display unit 506.

  The reservation list display processing unit 529 uses the input operation unit 505 to input a recording reservation list and a download reservation list stored in the reservation list storage unit 531 when a user inputs a recording reservation list and download reservation list browsing command R31. And display data D7 of the recording reservation list and download reservation list are generated and output to the display unit 506.

  The reproduction command processing unit 530 uses the input operation unit 505 in the recording reservation list or download reservation list displayed on the display unit 506 to select a content to be reproduced by the recording apparatus 600 and to reproduce the content R34. Is input using the transmission means such as the optical communication unit 511, the reproduction command R35 including the event ID stored in the reservation list storage unit 531 in association with the content and the device ID held by the terminal device 500. Processing is performed so as to be transmitted to the recording apparatus 600.

  The decryption unit 533 is encrypted for external take-out by the recording device 600 and is taken in via the storage medium 6 such as a memory card that is detachable from the card interface unit 514, the USB interface unit 515, or a wireless LAN (not shown). The recorded content data is downloaded to the download reservation list in the reservation list storage unit 531 using the event ID and device ID registered in the recording reservation list in the reservation list storage unit 531 in association with the recording reservation information D5. Using the event ID and device ID registered in association with the reservation information D 6, the content data is decoded into content data that can be played back by the terminal device 500 and output to the content data storage unit 525.

  The terminal device 500 in the present embodiment is assumed to be a mobile phone, a mobile terminal such as a PDA (Personal Digital Assistant), a personal computer, or the like. However, the terminal device 500 of the present invention is not limited to these devices, and may take any form as long as it has the elements shown in FIGS.

  Next, the recording apparatus 600 will be described. FIG. 7 is a diagram illustrating a hardware configuration of the recording apparatus 600.

  The recording apparatus 600 according to this embodiment includes content data D1 distributed from the content distribution server 200 via the network 1, each broadcast such as terrestrial analog television broadcast, terrestrial digital television broadcast, CS digital broadcast, and BS digital broadcast. A device capable of recording and reproducing content data D2 such as a broadcast program broadcast from station 3 every moment is assumed.

  As shown in the figure, the CPU 601 has a ROM 603, a RAM 604, an input operation unit 605, an AV interface unit 606, a display unit 607, a network connection unit 608, and a decoding unit 609 via a system bus 602. An encoding unit 610, a broadcast receiving unit 611, an optical communication unit 612, a storage unit 613 composed of a hard disk drive (HDD), a media interface unit 614, a card interface unit 615, and a USB interface unit 616. It is connected.

  The input operation unit 605 includes various keys and processes input of various commands for recording / playback from the user. Various commands input from the input operation unit 605 are supplied to the CPU 601 through the system bus 602 by an interface unit (not shown).

  The display unit 607 includes, for example, a display device such as an LCD and a display control circuit that drives the display device.

  The AV interface unit 606 processes input / output of video signals and audio signals to / from an external AV device 4 such as a television connected to the recording apparatus 600.

  The broadcast receiving unit 611 receives broadcast waves distributed from each broadcast station 3 such as terrestrial analog television broadcast, terrestrial digital television broadcast, CS digital broadcast, and BS digital broadcast, and receives video signals and audio signals. Demodulate.

  The encoding unit 610 encodes the video signal and the audio signal of the broadcast program output from the broadcast receiving unit 611 by, for example, the MPEG2 (Moving Picture Experts Group 2) method.

  The network connection unit 608 processes connection with the network 1. The decoding unit 609 decodes the content data acquired from the content distribution server 200 via the network 1 and the encoded data of the program read from the storage unit 512 to restore video data and audio data. The restored digital video data is supplied to the AV interface unit 606 through the system bus 602 and output to the external AV device 4 such as a television connected to the AV interface unit 606.

  The optical communication unit 612 is an interface for processing communication with an external device such as the terminal device 500. Specifically, the optical communication unit 612 performs communication with an external device using light such as infrared rays as a wireless medium. It is. In addition to light, other wireless media such as radio waves, sound waves, and electromagnetic waves may be used. Note that communication with the terminal device 500 may be performed via the network 1 in addition to optical communication.

  The storage unit 613 is a storage unit including a hard disk drive. The storage unit 613 stores the recording reservation information D5, download reservation information D6 event ID, and device ID sent from the terminal device 500, the content data D1 acquired from the content distribution server 200 via the network 1, and further. Content data D2 such as a broadcast program received by the broadcast receiving unit 611 and encoded by the encoding unit 610 is recorded.

  A removable medium 2 such as an optical disk can be mounted on the media interface unit 614, and content data such as a broadcast program can be recorded on the removable medium 2. Examples of the removable medium 2 include a write once type and rewritable type DVD (Digital Versatile Disc), a Blu-ray disc, and the like.

  The card interface unit 615 is an interface for reading and writing data such as encrypted content data with respect to the storage medium 6 such as a memory card equipped with a semiconductor memory. The USB interface unit 616 is an interface for transferring data such as encrypted content data with an external device such as the terminal device 500.

  The ROM 603 stores a program for software processing to be executed by the recording apparatus 600 and the like. The RAM 604 is a writable volatile memory used for loading a program code to be executed by the CPU 501 and writing work data of the program. The CPU 601 loads a necessary program from the ROM 603 to the RAM 604 to interpret and execute the software process to be executed by the recording apparatus 600.

  Next, the software configuration of the recording apparatus 600 will be described with reference to FIG.

  As shown in the figure, the recording apparatus 600 includes a reservation processing unit 621, a reservation list storage unit 622, a content data acquisition unit 623, a content data storage unit 624, a direct access information provision unit 625, a reproduction processing unit 626, and an encryption unit. 627, a recorded content list display processing unit 628, and the like. Here, the reservation list storage unit 622 and the content data storage unit 624 are set in the removable medium 2 mounted on the storage unit 613 or the media interface unit 614.

  When receiving the remote recording reservation command R19 transmitted from the service server 300 via the network 1, the reservation processing unit 621 stores the recording reservation information D5, event ID, and device ID included in the remote recording reservation command R19 as a reservation list. The remote recording reservation result notification R21 indicating completion of the remote recording reservation is registered to the recording reservation list stored in the storage unit 622 and transmitted to the service server 300 via the network 1. When the reservation processing unit 621 receives a remote download reservation command R19 ′ transmitted from the service server 300 through the network 1, the download processing information D6, the event ID, and the device included in the remote download reservation command R19 ′ are received. The ID is registered in the download reservation list stored in the reservation list storage unit 622, and a remote download reservation result notification R 21 ′ indicating the completion of the remote download reservation is transmitted to the service server 300 via the network 1.

  The content data acquisition unit 623 is distributed from the content distribution server 200 based on the recording reservation information D5 stored in the recording reservation list in the reservation list storage unit 622 and the download reservation information D6 stored in the download reservation list. The content data D1 and the content data D2 such as a broadcast program broadcast from the broadcasting station 3 are selectively received and recorded in the content data storage unit 624.

  The direct access information providing unit 625 performs a process of logging in to the XMPP server 414 of the direct access management server 400 and setting a bidirectional always connected session with the direct access management server 400. Further, when the direct access information providing unit 625 receives the direct access information acquisition request R16 from the direct access management server 400 through the always-on session, the direct access information providing unit 625 receives the local IP address and the recording device 600 in the router that connects the recording device 600 to the network 1. A direct access URI including a global IP address and a port number mapped to the port number is generated, and a direct access information acquisition response R17 including the direct access URI is transmitted to the direct access management server 400.

  When the recorded content list display command R41 is input by the user using the input operation unit 605, the recorded content list display processing unit 628 receives the display data D11 of the list of content data recorded in the content data storage unit 624. Processing is performed so as to generate and output to the AV interface unit 606 for display on the external AV device 4.

  For example, in the list of recorded content data displayed on the external AV device 4, the encryption unit 627 uses the input operation unit 605 to select content data to be taken out by the user and input a take-out command R42. Is performed, the selected content data is read from the content data storage unit 624, and the content data is associated with the content data using the event ID and the device ID stored in the reservation list storage unit 622. The data is encrypted and written to the storage medium 6 such as a memory card attached to the card interface unit 615, or transferred to the terminal device 500 via the USB interface unit 616 or a transmission means such as a wireless LAN (not shown). Note that the timing of encrypting the content data is not limited to this, and may be performed simultaneously with the recording of the content data.

  The take-out command R42 may be input from the terminal device 500. In this case, the terminal device 500 inquires of the recording device 600 about the recorded program, manages the recorded content in the reservation list owned by the terminal device 500, and among the recorded content by the user The take-out command R42 for the selected content may be transmitted to the recording apparatus 600 via the USB interface unit 616 or a transmission means such as a wireless LAN (not shown).

  When the reproduction processing unit 626 receives the reproduction command R35 from the terminal device 500 through the optical communication unit 612, the reproduction processing unit 626 extracts the event ID and the device ID included in the reproduction command R35 and associates them with the event ID and the device ID. The content code included in the recorded recording reservation information D5 or download reservation information D6 is searched from the recording reservation list or download reservation list stored in the reservation list storage unit 622. Further, the reproduction processing unit 626 reads out the corresponding content data from the content data storage unit 624 using the retrieved content code as a key, decodes it by the decoding unit 609, and the restored digital video data and audio data is an AV interface. Processing is performed so as to be supplied to the unit 606. Note that the transmission of the reproduction command R35 from the terminal device 500 to the recording device 600 is not limited to the optical communication unit, but also the storage medium 6 such as a memory card that is detachably attached to the card interface unit 615, the USB interface unit 616, or Other transmission means such as a wireless LAN (not shown) may be used.

Next, the operation of this embodiment will be described.
In the direct access management server 400, it is assumed that the association between the control device / service management ID and the controlled device management ID has already been completed.

  First, the operation when the terminal device 500 browses the content guide acquired from the content guide distribution server 100 and selects the content and inputs the remote recording reservation command for the content will be described. Since the operation when the remote download reservation command for the content is input is the same, in the following description, the portion related to the remote download reservation is described in parentheses in order to omit redundant description.

  First, in FIG. 6, the user of the terminal device 500 inputs a content guide browsing command R <b> 1 using the input operation unit 505. When the content guide browsing command R1 is input, the content guide data acquisition unit 521 in the terminal device 500 transmits a content guide acquisition request R2 to the content guide distribution server 100 via the network 1. Upon receiving the content guide acquisition request R2, the content guide distribution server 100 transmits content guide data as a content guide acquisition response R3 to the terminal device 500 via the network 1.

  The content guide data acquisition unit 521 in the terminal device 500 receives the content guide data transmitted from the content guide distribution server 100 as the content guide acquisition response R3 and stores it in the content guide data storage unit 522. Upon completion of acquisition of the content guide data, the content guide display processing unit 523 in the terminal device 500 creates content guide display data D4 from the content guide data stored in the content guide data storage unit 522 and outputs the content guide display data D4 to the display unit 506. . As a result, the content guide screen is displayed on the display unit 506 of the terminal device 500.

  When a user selects a content and inputs a remote recording reservation command R4 (remote download reservation command R4 ′) for the content on the content guide screen displayed on the display unit 506 by using the input operation unit 505. The reserved content selection unit 527 first determines the selected content. After that, the reserved content selection unit 527 determines from the content guide data stored in the content guide data storage unit 522 recording reservation information D5 (information for remote download) that is information necessary for remote recording reservation of the selected content. In this case, remote download reservation information D6) is taken out and an event ID is generated.

  Next, the reservation content selection unit 527 stores the recording reservation information D5 (remote download reservation information D6), the generated event ID, and the device ID unique to the terminal device 500 in the reservation list storage unit 531. In addition to registering in the recording reservation list (remote download reservation list), the reservation processing unit 532 has a recording reservation information D5 (remote download reservation information D6), an event ID, and a remote recording reservation request issuance command R5 (including device ID). A remote download reservation request issue command R5 ') is given.

  FIG. 9 is a diagram showing the configuration of the recording reservation list 541 and the remote download reservation list 542 stored in the reservation list storage unit 531 of the terminal device 500. As shown in the figure, the recording reservation list 541 includes recording reservation information D5 including information such as a content code, a channel name, a broadcast date, a broadcast start / end time, and a title name for each target content for remote recording reservation. The event ID (D5-1) is stored in association with each other. In the remote download reservation list 542, for each target content for remote download reservation, download reservation information D6 including information such as a content code, a URL of a download source, and a title name, and an event ID (D6-1) are stored in association with each other. Is done.

  Upon receiving the remote recording reservation request issuance command R5 (remote download reservation request issuance command R5 ′) from the reservation content selection unit 527, the reservation processing unit 532 sends the recording reservation information to the service server 300 via the network 1. The remote recording reservation request R14 (remote download reservation request R14 ′) including D5 (remote download reservation information D6), the event ID, and the device ID is transmitted.

  In FIG. 3, when the reservation processing unit 301 in the service server 300 receives a remote recording reservation request R14 (remote download reservation request R14 ′) from the reservation processing unit 532 in the terminal device 500, direct access management via the network 1 is performed. The server 400 acquires information necessary for the service server 300 to directly access the recording device 600 associated with the combination of the terminal device 500 and the remote recording reservation service (remote download reservation service). The requested direct access start request R15 is transmitted. In this direct access start request R15, a control device / service management ID, which is an ID assigned to a combination of the terminal device 500, which is a control device, and the remote recording reservation service, which is registered in advance in the service server 300, is registered. include.

  In FIG. 4, in the direct access management server 400, an XMPP server 414 for setting a bidirectional always-connected session with the recording apparatus 600 registered as a controlled device is operating. The XMPP session is established with the direct access management server 400, and information is exchanged with the direct access management server 400 through the XMPP session.

  When the direct access request processing unit 413 in the direct access management server 400 receives the direct access start request R15 from the service server 300 through the always connected session, the control device / service management ID included in the direct access start request R15 and The control device / service / controlled device management ID storage unit 411 stores the control device / service management ID stored in the control device management ID and the control device management ID, and the control included in the direct access start request R15 is referred to. Necessary for determining the controlled device management ID linked to the device / service management ID and allowing the service server 300 to directly access the recording device 600 via the network 1 for the corresponding recording device 600. Direct requests that require the acquisition of sensitive information Transmitting the Seth information acquisition request R16.

  In FIG. 8, the direct access information providing unit 625 in the recording device 600 has already logged in to the XMPP server 414 of the direct access management server 400 and completed setting of a bidirectional always-connected session with the direct access management server 400. Suppose you are. In this embodiment, it is assumed that the recording apparatus 600 is connected to the network 1 through a router. When the direct access information providing unit 625 receives the direct access information acquisition request R16 through the always-connected session from the direct access request processing unit 413 in the direct access management server 400, the direct access information providing unit 625 maps the local IP address and port number of the recording device 600 in the router. A direct access URI including the global IP address and port number thus generated is generated and transmitted as a direct access information acquisition response R17 to the direct access management server 400 through a continuous connection session.

  In FIG. 4, when the direct access request processing unit 413 in the direct access management server 400 receives the direct access information acquisition response R17 from the direct access information providing unit 625 in the recording apparatus 600 through the always-connected session, the direct access information acquisition unit 413 acquires this direct access information. The direct access URI included in the response R17 is transmitted as a direct access start response R18 to the reservation processing unit 301 in the service server 300 that is the direct access start request source.

  In FIG. 3, when the reservation processing unit 301 in the service server 300 receives the direct access start response R18 from the direct access request processing unit 413 in the direct access management server 400, the reservation processing unit 301 for direct access included in the direct access start response R18. Access to the URI, that is, the recording device 600, and the remote recording reservation command R19 (remote download reservation command R19 ′) including the recording reservation information D5 (remote download reservation information D6), the event ID, and the device ID of the terminal device 500 Send.

  In FIG. 8, when the reservation processing unit 621 in the recording device 600 receives a remote recording reservation command R19 (remote download reservation command R19 ′) transmitted from the service server 300 via the network 1, the remote recording reservation command Recording reservation information D5 (remote download reservation information D6), event ID, and device ID included in R19 (remote download reservation instruction R19 ′) are registered in the recording reservation list (download reservation list) stored in the reservation list storage unit 622. To do.

  FIG. 10 is a diagram showing the configuration of the recording reservation list 641 and the remote download reservation list 642 stored in the reservation list storage unit 622 in the recording apparatus 600. As shown in the figure, the recording reservation list 641 includes recording reservation information D5 including information such as a content code, a channel name, a broadcast date, a broadcast start / end time, and a title name for each target content for remote recording reservation. The event ID (D5-1) and the device ID (D5-2) are stored in association with each other. The remote download reservation list 642 includes download reservation information D6 including information such as a content code, a download source URL, and a title name, an event ID (D6-1), and a device ID (for each target content for remote download reservation. D6-2) are stored in association with each other.

  Thereafter, the reservation processing unit 621 transmits a remote recording reservation result notification R21 (remote download reservation result notification R21 ′) indicating the completion of the remote recording reservation (remote download reservation) to the service server 300 via the network 1.

  In FIG. 3, when the reservation processing unit 301 in the service server 300 receives a remote recording reservation result notification R21 (remote download reservation result notification R21 ′) from the reservation processing unit 532 in the recording device 600, the reservation processing unit 301 in the remote recording reservation request source. A remote recording reservation result notification R22 (remote download reservation result notification R22 ′) is transmitted to a certain terminal device 500 via the network 1.

  Thus, the remote recording reservation (remote download reservation) of the content such as the broadcast program selected in the content guide in the terminal device 500 is completed.

  In FIG. 8, in the recording apparatus 600, the content data acquisition unit 623 performs a content distribution server via the network 1 based on the recording reservation information D <b> 5 registered in the recording reservation list 641 stored in the reservation list storage unit 622. Riding on the broadcast wave from each broadcasting station 3 such as content data D1 such as a broadcast program sent by IP multicast broadcast from 200, for example, terrestrial analog television broadcast, terrestrial digital television broadcast, CS digital broadcast, etc. Content data D 2 such as a broadcast program to be sent is selectively received and recorded in the content data storage unit 624.

  In the recording apparatus 600, the content data acquisition unit 623 also sends the content distribution server 200 via the network 1 based on the download reservation information D 6 registered in the download reservation list 642 stored in the reservation list storage unit 622. On the other hand, by transmitting a download request for the content data D1 supplied by the VoD method, the content data D1 is downloaded and recorded in the content data storage unit 624. In this way, the content data D1 and D2 that are reserved for remote recording and remote download by the user of the terminal device 500 are recorded in the recording device 600.

  FIG. 11 is a diagram showing a configuration of content data recorded in the content data storage unit 624 of the recording apparatus 600. As shown in the figure, the content data D1 and D2 stored in the content data storage unit 624 includes, for example, a content code D21, a title name D22, a content data body D23, and the like.

  Next, an operation when a copy of the content data recorded by the recording device 600 is taken out to the terminal device 500 will be described. In this embodiment, the following operation is performed in order to enable reproduction of a copy of the content data recorded by the recording device 600 only to the terminal device 500 of the remote recording reservation request source and the remote download reservation request source. Do.

  As described above, in the recording device 600, the reservation list storage unit 622 stores the recording reservation information D5 and event ID extracted from the remote recording reservation command R19, the device ID of the terminal device 500, and the remote download reservation command R19 ′. The remote download reservation information D6, event ID, and device ID of the terminal device 500 extracted from the above are stored. Here, the event ID is an ID generated in the terminal device 500 every time the remote recording reservation command R4 and the remote download reservation command R4 ′ are generated in the terminal device 500, and the device ID is an ID unique to the terminal device 500. Thus, by encrypting the content data using these event IDs and device IDs as encryption keys, encrypted data that cannot be decrypted by devices other than the terminal device 500 having these IDs can be obtained. Details of the operation will be described below.

  In FIG. 8, in the recording apparatus 600, first, content data to be taken out to an external device is selected by the user. This selection of content data is performed as follows, for example. The user uses the input operation unit 605 to input a recording content list display command R41. The recorded content list display command R41 is input to the recorded content list display processing unit 628, and the recorded content list display processing unit 628 generates display data D11 of a list of content data recorded in the content data storage unit 624. To the AV interface unit 606. As a result, a list of content data is displayed on the display of the external AV device 4.

  In the list of content data displayed on the display of the external AV device 4, when the user selects content data to be taken out using the input operation unit 605 and inputs a take-out command R42, the encryption unit 627 The content data to be taken out is read from the content data storage unit 624 to generate a copy, and the event ID and device ID corresponding to the content data to be taken out are read from the reservation list storage unit 622, and these event ID and device ID are read out. Using as an encryption key, the content data generated as a copy is encrypted. In this encrypted content data, the content code is not encrypted because it needs to be read when the terminal device 500 determines the content data before decrypting the content data. The encrypted content data D12 obtained in this way is stored in the terminal device via a storage medium 6 such as a memory card that can be attached to and detached from the card interface unit 615, a USB interface unit 616, or a transmission means such as a wireless LAN (not shown). 500.

  The terminal device 500 is encrypted by the recording device 600 for external use via a storage medium 6 such as a memory card that can be attached to and detached from the card interface unit 514, a USB interface unit 515, or a transmission means such as a wireless LAN (not shown). When the encrypted content data D12 is taken in, the decrypting unit 533 determines the content code added to the encrypted content data D12. Next, the decoding unit 533 searches the recording reservation information D5 or the download reservation information D6 including the determined content code from the recording reservation list 541 and the remote download reservation list 542 stored in the reservation list storage unit 531. The event ID associated with the searched recording reservation information D5 or download reservation information D6 is determined. Then, the decryption unit 533 decrypts the encrypted content data D12 using the determined event ID and the device ID of the terminal device 500 as the decryption key. As a result, content data that can be reproduced by the terminal device 500 is obtained and stored in the content data storage unit 525.

  As described above, the duplicated content data taken out from the recording device 600 includes the event ID and device ID sent from the terminal device 500 along with the remote recording reservation request or remote download reservation request for the content data. Is used as an encryption key, so that only the remote recording reservation request source and remote download reservation request source terminal device 500 possessing those event ID and device ID are duplicated from the recording device 600. The content data can be reproduced.

  Next, limitations when reproducing content data recorded in the recording device 600 in accordance with the remote recording reservation request and the remote download reservation request from the terminal device 500 will be described. In order to reproduce the content data recorded in the recording apparatus 600 in accordance with the remote recording reservation request and the remote download reservation request on the recording apparatus 600, the terminal that is the remote recording reservation request source or the remote download reservation request source. A playback command from the device 500 is required. Next, details of this operation will be described.

  In FIG. 6, the reservation list display processing unit 529 in the terminal device 500 stores the recording reservation list and download reservation list viewing command R31 from the user using the input operation unit 505, and stores them in the reservation list storage unit 531. The recorded recording reservation list and download reservation list (FIG. 9) are read, and display data D7 of these recording reservation list and download reservation list is generated and output to the display unit 506. As a result, the contents of the recording reservation list and download reservation list are displayed on the display unit 506 of the terminal device 500.

  In the recording reservation list or download reservation list displayed on the display unit 506, the user inputs a selection of content data to be reproduced on the recording apparatus 600 and a reproduction instruction R34 for the content data using the input operation unit 505. Then, the playback command processing unit 530 reads the event ID associated with the selected content data from the recording reservation list or download reservation list stored in the reservation list storage unit 531, and this event ID and its own terminal The reproduction command R35 including the device ID of the device 500 is transmitted to the recording device 600 by a secure method using the optical communication unit 511 or the like. Note that the transmission of the reproduction command R35 from the terminal device 500 to the recording device 600 is not limited to the optical communication unit, but also the storage medium 6 such as a memory card that is detachably attached to the card interface unit 615, the USB interface unit 616, or Other transmission means such as a wireless LAN (not shown) may be used.

  In FIG. 8, when the reproduction processing unit 626 in the recording apparatus 600 inputs a reproduction command R35 from the terminal device 500 through the optical communication unit 612 or the like, the event ID and the device ID are extracted from the reproduction command R35, and these Search for the content code included in the recording reservation information D5 or download reservation information D6 associated with the event ID and device ID from the recording reservation list or download reservation list (see FIG. 10) stored in the reservation list storage unit 622. To do.

  Next, the playback processing unit 626 in the recording device 600 reads the corresponding content data body from the content data storage unit 624 (see FIG. 11) using the retrieved content code as a key, and decodes it by the decoding unit 609. The restored digital video data and audio data are supplied to the AV interface unit 606. As a result, content can be viewed through the external AV device 4 such as a television connected to the AV interface unit 606.

  In the above embodiment, the content data is encrypted with the event ID and the device ID. However, the present invention is not limited to this. For example, only the device ID is used as an encryption key. In this case, it is possible to provide a restriction that reproduction of a copy of the content data recorded in the recording device 600 can be performed only by the terminal device that is the remote recording reservation request source and the remote download reservation request source. However, when restricting the taking-out of copies in units of content data, as described in the above embodiment, remote recording such as an ID unique to each terminal device such as a device ID and an event ID is performed. A unique ID is used as an encryption key for each reservation request and each remote download reservation request.

  Further, in each of the above embodiments, the data exchange between the terminal device 100 and the recording device 600 is controlled using the service server 300 and the direct access management server 400. The present invention can be applied regardless of the method for controlling the exchange of data between the recording apparatus 600 and the recording apparatus 600.

  Further, regarding the transfer of the encryption key from the terminal device 500 to the recording device 600, in the above embodiment, the event ID and the device ID are added to the remote recording reservation request and the remote download reservation request and transferred to the recording device 600. However, after transmitting the remote recording reservation request and the remote download reservation request, the encryption key may be transmitted separately. For example, it may be after a remote recording reservation request and a remote download reservation request, after the recording of content data in the recording apparatus 600 is completed, or after the download is completed.

  Needless to say, in the transfer of the encryption key, it is desired to encrypt the encryption key by a known encryption method such as SSL (Secure Socket Layer).

  In the above embodiment, the service server 300 transmits the remote recording reservation command R19 and the remote download reservation command R19 ′ to the recording device 600 based on the direct access URI acquired from the direct access management server 400. However, if the terminal device 500 acquires the direct access URI from the service server 300 via the network 1, the remote recording reservation command R19 or the remote download reservation command R19 ′ is transmitted from the terminal device 500 to the recording device 600. May be transmitted.

  In the above embodiment, the service server 300 dedicated to the remote recording reservation service and the remote download reservation service is used. However, the remote recording reservation service By incorporating software for performing a remote download reservation service, the content guide distribution server 100 or the content distribution server 200 can be used as a service server.

  Furthermore, in each of the embodiments described above, the service server 300 and the direct access management server 400 are realized by separate server devices. However, the software of the service server 300 and the direct access management server 400 may be combined into one server device. The service server 300 and the direct access management server 400 may be integrated into one server by incorporating software.

  Further, in each of the above-described embodiments, the remote recording reservation and the remote download reservation are mainly described as the services provided by the service server 300. However, the present invention is not limited to this, and the content on the network is recorded. As long as it is a service for recording in the apparatus 600, services other than remote recording reservation and remote download reservation can be handled in the same manner.

  In the above embodiment, the terminal device 500 selects content such as a program to be viewed from the content guide, and acquires and reproduces the content data. The procedure for selecting the content from the content guide is not essential, and the method for selecting the content is not limited.

  The present invention is not limited only to the above-described embodiment, and it is needless to say that various updates can be added without departing from the gist of the present invention.

It is a figure which shows the whole structure of the content recording system which concerns on embodiment of this invention. It is a block diagram which shows the hardware structure of the content guide delivery server of FIG. 1, a content delivery server, a service server, and a direct access management server. It is a block diagram which shows the structure of the software of a service server. It is a block diagram which shows the software structure of a direct access management server. It is a block diagram which shows the structure of the hardware of a terminal device. It is a block diagram which shows the software structure of a terminal device. It is a block diagram which shows the structure of the hardware of a video recording apparatus. It is a block diagram which shows the structure of the software regarding the remote recording reservation / download reservation in a recording device. It is a figure which shows the structure of the video recording reservation list and remote download reservation list which were stored in the reservation list storage part of the terminal device. It is a figure which shows the structure of the recording reservation list and remote download reservation list which were stored in the reservation list storage part of the recording device. It is a figure which shows the structure of the content data recorded on the content data storage part of the video recording apparatus.

Explanation of symbols

10 Network system
DESCRIPTION OF SYMBOLS 100 Content guide delivery server 200 Content delivery server 300 Service server 400 Direct access management server 500 Terminal device 521 Content guide data acquisition part 522 Content guide data storage part 523 Content guide display process part 524 Content data acquisition part 525 Content data storage part 526 Content Reproduction unit 527 Reserved content selection unit 529 Reservation list display processing unit 530 Reproduction command processing unit 531 Reservation list storage unit 532 Reservation processing unit 533 Decoding unit 600 Recording device 621 Reservation processing unit 622 Reservation list storage unit 623 Content data acquisition unit 624 Content data Storage unit 625 Direct access information providing unit 626 Playback processing unit 627 Encryption unit 628 Recorded content list display processing unit

Claims (12)

In a content recording system in which a terminal device and a recording device can be connected via a network,
The terminal device
A reservation processing unit that transmits a reservation request for reservation of acquisition of content data to the recording device and an encryption key for encrypting the content data;
A decrypting unit for canceling encryption of the copy of the content data acquired from the recording device with the encryption key;
The recording device comprises:
A content data acquisition unit that acquires the content data based on the reservation request;
A content data storage unit that stores the content data acquired by the content data acquisition unit;
A content recording system comprising: an encryption unit that encrypts the content data stored in the content data storage unit with the encryption key acquired from the terminal device to create a copy of the content data. A reservation processing unit for transmitting a reservation request for reserving acquisition of content data to the recording apparatus and an encryption key for encrypting the content data;
An encryption key transfer unit for transferring an encryption key for encrypting the content data acquired by the recording device according to the reservation request to the recording device;
A terminal device comprising: a decrypting unit that decrypts encryption of the copy of the content data acquired from the recording device with the encryption key.   The terminal device according to claim 2, wherein the encryption key includes an ID unique to the terminal device.   The terminal device according to claim 2, wherein the encryption key includes an ID unique to the terminal device and an ID unique to each reservation request.   The terminal device according to claim 2, wherein the reservation request transmitted by the reservation processing unit is a remote recording reservation request for broadcast content.   The terminal device according to claim 2, wherein the reservation request transmitted by the reservation processing unit is a content remote download reservation request.   The terminal device according to claim 2, further comprising a reproduction command processing unit that transmits a reproduction command including the encryption key to the recording device. A content data acquisition unit that acquires content data based on a reservation request from a terminal device connected through a network;
A content data storage unit that stores the content data acquired by the content data acquisition unit;
An encryption unit that encrypts the content data stored in the content data storage unit with an encryption key acquired together with a reservation request from the terminal device, and creates a copy of the content data. apparatus. A storage unit that stores the encryption key acquired together with the reservation request from the terminal device in association with the content data stored in the content data storage unit;
The reproduction command including the encryption key transmitted from the terminal device is input, the encryption key included in the reproduction command is compared with the encryption key stored in the storage unit, and the encryption key is associated with the matching encryption key. The recording apparatus according to claim 8, further comprising: a reproduction processing unit that reproduces the content data. The terminal device and the recording device are connected via a network,
In the terminal device, the reservation processing unit transmits a reservation request for reserving acquisition of content data to the recording device and an encryption key for encrypting the content data through the network;
In the recording device, a content data acquisition unit acquires the content data based on the reservation request received through the network and stores the content data in a storage unit;
In the recording device, an encryption unit encrypts the content data stored in the storage unit with the encryption key acquired from the terminal device, and creates a copy of the content data;
In the terminal device, the decrypting unit includes a step of releasing encryption of the copy of the content data acquired from the recording device with the encryption key. A computer program for a terminal device,
A reservation processing unit for transmitting a reservation request for reserving acquisition of content data to the recording apparatus and an encryption key for encrypting the content data;
An encryption key transfer unit for transferring an encryption key for encrypting the content data acquired by the recording device according to the reservation request to the recording device;
A computer program for a terminal device, which causes a computer to function as a decryption unit that cancels encryption of a copy of the content data acquired from the recording device using the encryption key. A computer program for a recording device,
A content data acquisition unit that acquires content data based on a reservation request from a terminal device connected through a network;
A content data storage unit that stores the content data acquired by the content data acquisition unit;
A computer is caused to function as an encryption unit that creates a copy of the content data by encrypting the content data stored in the content data storage unit with an encryption key acquired together with a reservation request from the terminal device. A computer program for a recording device.

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