WO2012157446A1 - Dispositif de réception et procédé de réception - Google Patents

Dispositif de réception et procédé de réception Download PDF

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Publication number
WO2012157446A1
WO2012157446A1 PCT/JP2012/061534 JP2012061534W WO2012157446A1 WO 2012157446 A1 WO2012157446 A1 WO 2012157446A1 JP 2012061534 W JP2012061534 W JP 2012061534W WO 2012157446 A1 WO2012157446 A1 WO 2012157446A1
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WO
WIPO (PCT)
Prior art keywords
conversion
content
digital content
recording medium
recording
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Application number
PCT/JP2012/061534
Other languages
English (en)
Japanese (ja)
Inventor
佐々本　学
秀二 石原
是枝　浩行
Original Assignee
日立コンシューマエレクトロニクス株式会社
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Publication of WO2012157446A1 publication Critical patent/WO2012157446A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H04N21/4882—Data services, e.g. news ticker for displaying messages, e.g. warnings, reminders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver

Definitions

  • the present invention relates to a receiver that receives content distributed from a distribution system via a network, a reception method thereof, and a content distribution method in a content transmission / reception system including the distribution system and the receiver.
  • Patent Document 1 describes an embodiment that realizes a distribution system including a server that distributes content and a receiver that downloads and reproduces content from the server via the Internet.
  • the Internet browser obtains a download control file (referred to as a download control metafile in the present invention) describing the content download execution contents from the server, and this file is interpreted by the download agent and downloaded.
  • a download control file referred to as a download control metafile in the present invention
  • An object of the present invention is to enable a content receiver to receive copyright-protected content distributed from various networks and export it to other devices under certain restrictions. .
  • the present application includes a plurality of means for solving the above problems.
  • Digital content including a video signal and an audio signal that have been digitally compressed and encoded, and conversion enable / disable information indicating whether or not the digital content can be converted by a digital compression encoding method and / or a code bit rate can be converted via a network.
  • Receiving means first recording means for recording the digital content received by the receiving means on a first recording medium, and storage means for storing the conversion availability information received by the receiving means in association with the digital content;
  • a conversion means for reading the digital content recorded on the first recording medium; a second recording means for recording the digital content read by the reading means on the second recording medium;
  • Conversion feasibility determination means for changing the digital compression encoding method of digital content.
  • the conversion enable / disable determining means determines from the conversion enable / disable information stored in the storage means that the conversion enable / disable information indicates that conversion is possible
  • the selection means displays an option for whether or not to convert, and Is selected
  • the conversion means converts the digital compression encoding method and / or the code bit rate of the digital content read from the first recording medium by the reading means. If it is recorded on the second recording medium by the second recording means and it is selected not to perform conversion, the digital content read from the first recording medium by the reading means is selected.
  • the selection means selects whether or not to perform conversion.
  • the digital content read from the first recording medium by the reading means is recorded on the second recording medium by the second recording means without displaying the image.
  • FIG. 1 is an example of a configuration of a content transmission / reception system to which the present embodiment is applied.
  • the distribution network includes a content distribution network 40 that is connected to a home via the router 43 and guarantees network quality within the network, and an external Internet network 45 that is connected from the content distribution network 40.
  • the distribution system 60 may be connected to the content distribution network 40 via the network switch 42 or may be connected to the Internet network 45 via the router 44 with emphasis on versatility.
  • Various network communication paths 46 such as coaxial cable, optical fiber, ADSL (Asymmetric Digital Subscriber Line), and wireless communication are assumed for home network connection, and modulation / demodulation suitable for each path is performed by the transmission line modem 45. And converted to an IP network.
  • the IP network demodulated by the transmission path modulator / demodulator 46 and converted into a network interface is connected to a device in the home via the router 48.
  • a receiver 50, a storage device (Network Attached Storage) 32 corresponding to an IP network, a personal computer 33, an AV device that can be connected to a network, and the like are assumed.
  • the receiver 50 may have a function of playing back and storing broadcasts received from the antenna 35.
  • FIG. 2 is a configuration example of the content distribution system 40.
  • the content distribution system 60 is a meta server that distributes a Web server 61 that distributes a Web document 71, ECG metadata 400 that describes attribute information of the content to be distributed, and reproduction control information 200 that describes information necessary for reproducing the content.
  • a customer management server 65, and a billing / settlement server 66 for charging and settlement of contents by the customer.
  • the servers are connected to each other by the IP network 67 and are connected to the Internet network 45 or the content distribution network 40 of FIG. A part or all of each server may be directly connected to the Internet network 45 or the content distribution network 40 without going through the IP network 67 to communicate with each other.
  • Each server included in the distribution system 60 is merely a convenient model, and an actual distribution system may have a configuration in which a plurality of types of servers are integrated, and there are no servers. It may be okay.
  • a server used for distributing a plurality of data such as the metadata server 62 may be configured by dividing the actual server for each type of data.
  • Each server is connected by a network such as the Internet.
  • FIG. 3 is a configuration example of the receiver 50.
  • the receiver 50 has a storage 550 that can reproduce the received content, output it to a removable medium or a network, and store the content.
  • solid arrows indicate the flow of content
  • broken arrows indicate the flow of control.
  • the receiver 50 is physically connected to the IP network, and transmits and receives an IP (Internet Protocol) data packet.
  • IP Internet Protocol
  • the communication interface 510 and the communication I / F 510 are used for TCP (Transmission Control Protocol), UDP.
  • the communication processing unit 511 performs processing of various IP communication protocols such as (User Datagram Protocol), DHCP (Dynamic Host Configuration Protocol), DNS (domain name server), and HTTP (Hyper Text Transfer Protocol).
  • the downloader 55 is a processing unit that performs processing for acquiring content and information related to the content.
  • the DRM client 54 manages the copyright of the content and provides a function for controlling viewing and copying of the content according to the content purchase conditions.
  • the decryptor 514 decrypts the content to be downloaded based on an instruction from the DRM client 54.
  • the stream output processing unit 57 outputs the content to the removable medium 560 connected to the receiver 50. Alternatively, the stream output processing unit 57 outputs content to the network connection device 570 connected via the communication processing unit 511 and the communication I / F 510.
  • the removable medium 560 is a removable storage medium that can be accessed via the removable medium I / F 534 connected to the stream output processing unit 541.
  • the receiver 50 includes a remote control I / F 533 for operation, and is operated by the user according to the received remote control signal. Further, the receiver 50 may have a function of receiving a streaming delivery service for on-demand video / audio content. In this case, a streaming reception processing unit 512 that processes real-time reception of video / audio content via the communication processing unit 511 is provided.
  • the AV player 53 decodes the downloaded content, the content distributed by streaming, or the content received by broadcasting, and converts it into video and audio signals.
  • the AV player 53 has a demultiplexer 521 inside, and the processing unit separates the content decoded by the decryptor 514 into video, audio, and subtitle packets, and each packet is divided into a video decoder 522, an audio decoder 523, Send to subtitle decoder 524.
  • These decoders 522, 523, and 524 decode the video, audio, and subtitle information, respectively, and the video / audio output process 530 converts them into integrated video / audio signals.
  • This video / audio signal is output from the receiver 50 to the outside via the video / audio output I / F 531.
  • the video / audio output processing 530 and the video / audio output I / F 531 may be HDMI (registered trademark) standard interfaces that process and output video and audio in an integrated manner. Examples such as video composite signal output and analog audio output that are processed and output to the outside are also possible.
  • the receiver 50 may have a function of receiving and recording a digital broadcast.
  • the receiver 50 receives a broadcast I / F 501 for inputting broadcast radio waves, a digital broadcast reception processing unit 502 that decodes a digital broadcast signal and converts it into a video / audio stream, and a copyright protection unit when decoding the digital broadcast signal.
  • It has CAS (Conditional Access System) 503 for processing.
  • the receiver 50 can output the downloaded content directly to the stream output processing unit 57 and output it to the removable medium 560 or the like.
  • the receiver 50 can also temporarily store the downloaded content in the storage 550. In this case, thereafter, the stream output processing unit 57 outputs the content acquired from the storage 550 to the removable medium 560 or the like by the operation of the receiver.
  • the downloaded content can be exported to the removable medium 560 via the stream output processing unit 57, so the content is stored in the storage 550.
  • the receiver 50 of FIG. 3 performs only the service of directly exporting 560 to a removable medium without going through the storage 550, a cheaper receiver without the storage 550 can be realized. It becomes.
  • the downloaded content is temporarily stored in the storage 550 without being decrypted, and the DRM client 54 receives a license from the DRM server 64 when the content stored in the storage 550 is reproduced or exported to the removable media 560 or the like. 300, and the decrypter 514 can decrypt the content stored in the storage 550 based on the content key 311 described in the license 300.
  • the decryptor 514 decodes the content, and the demultiplexer 521 separates the video, audio, and caption data packets.
  • the video decoder 522, the audio decoder 523, and the caption decoder 524 decode the separated video packets, audio packets, and caption data packets.
  • the video / audio output processing unit 530 outputs the decoded video / audio to the outside via the video / audio output I / F 531. Through these processes, the user can view the content.
  • the decryptor 514 decrypts the content, and the stream output processing unit 57 outputs the decrypted content to the removable medium 560 or the like.
  • the audio output processing unit 530, the storage 550, the browser 51, the ECG processing unit 52, the AV player 53, the DRM client 54, the downloader 55, and the stream output processing unit 57 are integrated circuits as processing units for performing each processing. It can be realized by hardware.
  • a digital broadcast reception processing program 502, a CAS program 503, a communication processing program 511, a streaming reception processing program 512, a decryptor program 514, a demultiplexer program 521 which are stored in a storage device such as a storage 550 or a memory (not shown).
  • an arithmetic processor such as a central control unit (not shown)
  • all or part of it is processed. It is also possible to realize processing by software.
  • each process realized by executing various programs by the central control unit or the like is described mainly by each processing unit realized by the program.
  • each processing unit When each processing unit is realized by hardware, each processing unit mainly performs each process.
  • FIGS. 4 to 5 show only some of the blocks used in the processing flow from the receiver 50 in FIG. 3, each of which has other processing units of the receiver 50 in FIG.
  • the configurations described in FIGS. 4 to 5 are not always necessary. Some may be omitted.
  • the receiver 581 in FIG. 4 is a subset obtained by extracting blocks for exchanging data with the streaming distribution system from the receiver 50 in FIG. 3.
  • the content distribution system 60 distributes a Web server 61 that distributes a Web document 71, ECG metadata 400 that describes attribute information of the content to be distributed, and a reproduction control metafile 200 that describes information necessary for reproducing the content.
  • a transmission path 67 for data communication between the receiver 581 and the distribution system 60 assumes the distribution network of FIG.
  • the browser 51 presents the Web document 71 received from the Web server 61 and operates the operation device such as a remote controller to search and search for the content 75 that the user wants to see.
  • the ECG (Electric Content Guide) processing unit 52 of the receiver application presents the ECG metadata 400 acquired from the metadata server 62 to the user in the form of ECG, and the content that the user wants to see from the ECG.
  • a method for searching and searching for 75 may be provided.
  • the browser 51 acquires the playback control metafile 200 in which the reference destination is described in the Web document 71 from the metadata server 62, and A reproduction request is made to the AV player 53.
  • the ECG processing unit 52 transmits the playback control metafile 200 in which the reference destination is described in the ECG metadata 400 from the metadata server 62. Obtaining and making a playback request to the AV player 53.
  • the AV player 53 acquires the content key described in the content license 300 and the signal output restriction / copy control information called RMPI (Right. Management and Protection Information) from the DRM client 54 in accordance with the contents of the playback control metafile 200. Then, the content key is set in the decryptor 514, the output conditions such as video and audio are set in the video / audio output I / F 531 in accordance with RMPI, and the content 75 distributed from the content server 63 is streamed.
  • RMPI Light. Management and Protection Information
  • the DRM client 54 holds a valid license 300 and, if requested by the AV player 53 or the stream output control unit 57, provides a content key and RMPI from the corresponding license 300. If the requested license 300 has not been acquired, the license 300 necessary for content reproduction is acquired from the DRM server 64.
  • the receiver 582 in FIG. 5 is a subset obtained by extracting blocks for exchanging data with the download distribution system from the receiver 50 in FIG. 3.
  • the browser 51 presents the Web 71 received from the Web server 61 and operates the operation device such as a remote controller to search and search for the content 75 that the user wants to see.
  • the ECG processing unit 52 of the receiver application presents the ECG metadata 400 acquired from the metadata server 62 to the user in the form of an ECG, and searches the content 75 that the user wants to see from the ECG. A means of finding out may be provided.
  • the browser 51 acquires the download control information 100 in which the reference destination is described in the Web document 71 from the metadata server 62, and the downloader.
  • a download execution request is issued to 55.
  • the ECG processing unit 52 acquires the download control information 100 in which the reference destination is described in the ECG metadata 400 from the metadata server 62. Then, a download execution request is made to the downloader 55.
  • the downloader 55 acquires the reproduction control metafile 200, and in accordance with the contents, downloader 55 controls the content key described in the content license 300 and signal output restriction / copy control called RMPI (Right. ⁇ Management ⁇ and ⁇ Protection Information). Information is acquired, the content key is set in the decryptor 514, the output conditions such as video and audio are set for the export destination removable media 560 and the network connection device 570 in accordance with RMPI, and the download control information 100 sets the distribution content.
  • the content 75 specified by the URL indicating the location 156 is requested to the content server 63, the content 75 distributed from the content server 63 is downloaded, and the content decrypted by the decryptor 514 is output as a stream. And outputs to the control unit 57, performs the export process.
  • the receiver 583 in FIG. 6 has extracted and described blocks for exchanging data with the download distribution system via the storage 550 from the receiver 50 in FIG.
  • the browser 51 presents the Web document 71 received from the Web server 61 and operates the operation device such as a remote controller to search and search for the content 75 that the user wants to see.
  • the ECG processing unit 52 of the receiver application presents the ECG metadata 400 acquired from the metadata server 62 to the user, and searches for the content 75 that the user wants to view. May provide a means of finding out.
  • the browser 51 When the selection of the content to be viewed from the user is received and the user issues a content download instruction on the Web document 71, the browser 51 receives the download control information 100 in which the reference destination is described in the Web document 71 from the metadata server 62. Obtain the download and make a download execution request to the downloader 55. The downloader 55 acquires the ECG metadata 400, the reproduction control metafile 200, and the content 75 of the content to be downloaded, and accumulates them in the storage 550.
  • the accumulated content 75 can be searched for, selected, reproduced, or exported by the ECG processing unit 52 of the receiver.
  • the ECG processing unit 52 is instructed to reproduce the content
  • the AV player 53 is activated to request reproduction
  • the stream output control unit 57 is activated to export the content. Request processing.
  • FIG. 7 is a correlation diagram of ECG metadata 400 presented for content search by the ECG processing unit 52 as an ECG.
  • the ECG metadata 400 is described in the XML format.
  • ECG metadata 400 is content metadata 430 that describes attribute information such as the name and description of each distributed program, video, audio, genre, etc., and each program can be managed by grouping a series of series.
  • Series metadata 410 can describe a series ID that uniquely identifies the series metadata 410 to which the program belongs, and the group metadata 410 describes the series ID of the series metadata 410 to which the program belongs. By doing so, a hierarchical group structure can be defined.
  • the license metadata 470 has a content ID that uniquely identifies content metadata 430 of a program that can be used with the license, and a purchase ID that uniquely identifies package metadata 450 that can be used as a purchase condition.
  • the package metadata 450 has a purchase ID and a content ID corresponding to each other.
  • the content metadata 430 is the reference information for acquiring the playback control information 200 for streaming playback and the download control information 100 for downloading content when the content can be played back by streaming and / or downloaded. Can have.
  • FIG. 8 shows a configuration example of the package metadata 470 in the ECG metadata 400.
  • the package metadata 450 includes a billing validity period 451 describing the start date / time and end date / time of billing, a purchase ID 452 for uniquely identifying the package metadata 450, and a target content ID 453 for identifying the content to be purchased of the package metadata 450. Hold.
  • the package metadata 450 can describe a plurality of packages in one package metadata, and has the following information for each package.
  • the package name 461, the package price 462, and the description 465 are information for presenting the package contents to the user.
  • the purchase type 463 is information for identifying the purchase form of the package, such as whether the package is a single content purchase, a series batch purchase, or a monthly contract purchase.
  • the distribution type 464 is a content distribution type. Is information for identifying a distribution form such as whether it is streaming distribution, download distribution, or both.
  • the purchase request URL 466 is information describing an access destination of a server that requests a purchase transaction based on a user's purchase operation.
  • the ECG processing unit 52 refers to the content metadata 430 or the series metadata 410, presents a search screen, finds the content to be used, and refers to the license metadata 470 of the content.
  • the purchase condition of the content is presented to the user, and the purchase operation is performed according to the package metadata 450.
  • the playback control information 200 is acquired according to the URL described in the content metadata 430, and the AV player 53 plays back the playback control information 200. Streaming playback is performed according to the description content.
  • the download control information 100 is acquired according to the URL described in the content metadata 430, and the downloader 55 downloads the download control information 100. Download the content according to the description.
  • FIG. 9 is a configuration example of the download control information 100.
  • the download control information 100 includes download control attribute information 110 describing the contents of the metafile itself, and download execution unit information 150 used to download one or more contents.
  • the download control information 100 is described by RSS (RDF Site Summary or Really Simple Syndication), for example.
  • RSS RDF Site Summary or Really Simple Syndication
  • the download control information can be created (prepared) for a plurality of arbitrary contents in a certain package, but does not extend over a plurality of packages.
  • download control information should be prepared so that all contents in the package can be downloaded.
  • the download control information 100 may be updated, and the receiver checks at regular intervals and updates the difference.
  • each content is uniquely identified by enclosure url.
  • the download control information 100 includes a download control information name 111 indicating the name of the corresponding download control information 100 (eg, download reservation name, file name, ID, etc.), and the location of the corresponding download control information 100 (eg, download reservation).
  • the URL on the Internet of the website providing the URL, but not limited to the URL, it may be another address. The same applies to the following.
  • the explanation of the download control information location 112 and the corresponding download control information 100 ( For example, it has information such as a description 113 of download control information indicating a download reservation, a language type, an update check flag 114, an update deadline date 115, and the like.
  • the update check flag 114 is a flag for determining whether or not the contents of the download control information 100 on the metadata server 62 have been changed, and whether or not to check periodically. After acquisition, it takes a “single” value that is not periodically checked.
  • the update deadline date and time 115 is valid when the update check flag 114 is “update”, and describes the date and time of the deadline for continuously checking the update of the download control information 100.
  • the update deadline date 115 indicates a deadline for monitoring content updates.
  • the unit of time limit (day unit, hour unit, minute unit, etc.) is arbitrary. It is also possible to take a value indicating "no expiration", i.e. semi-permanent checking. Further, as another implementation method, a configuration in which the update check flag 114 is omitted by handling a special value (for example, all 0) of the update deadline date and time 115 as a value indicating the update check flag 114 “single” can be realized. .
  • Multiple download execution unit information 150 can be described in the download control information 100.
  • the title 151 of the distribution content indicating the title of the content (may be a program name or the like, or a file name or ID), description of the content (features, remarks, etc.)
  • a description 152 of the distribution content indicating the distribution date
  • a distribution date 153 indicating the date and time of distribution (may be in units of days or minutes)
  • a content ID 154 of the distribution content uniquely identifying the content on the Internet and distribution Content type 155
  • content location 156 indicating the acquisition destination URL of the distribution content
  • ECG metadata location 157 indicating the acquisition destination URL of ECG metadata corresponding to the content
  • Delivery content size 159 stores information such as the location 160 of the stream reproduction control information indicating the acquisition destination of the URL of the stream reproduction control information that provides such picture playback position information of the content.
  • the content ID identifier 154 is described by a character string defined by the schema “CRID: // authority / content_id”, and the authority part is a keyword that uniquely identifies the content distributor on the network. is there.
  • the authority part is a keyword that uniquely identifies the content distributor on the network. is there.
  • a domain name managed as a unique name on the Internet is used as authority.
  • the content_id after authority / is an ID that uniquely identifies the content within authority, and the format of the character string may be freely operated with authority. Through such operations, it becomes possible to uniquely identify content on the Internet by the content identifier 154, and by accessing the content identifier 154 as a URL on the Internet, the target content and related metadata are acquired. It becomes possible to do.
  • the distribution date and time 153 normally describes the date and time when the content is stored in the content server 63 and published. However, when the download control information 100 is distributed, the content is not yet released, and the distribution date and time 153 is scheduled to be distributed. Future date and time may be listed. In addition, once the content of the distributed content is updated, the updated date / time is described in the distribution date / time 153.
  • the distribution content type 155 describes, for example, the type of video, photo, music, program, multimedia data distributed from the server.
  • the video may be further subdivided into movies, news, sports, etc., and the music may be further subdivided into classical, rock, jazz, etc. types.
  • Distribution content metadata is auxiliary information necessary for content playback and execution. Examples include content search genre and keyword information, and, if the content is video information, its thumbnail and chapter information. .
  • FIG. 10 is a configuration example of the playback control metafile 200. A configuration of the reproduction control metafile 200 acquired by referring to the download control information 100 will be described.
  • the playback control metafile 200 is decrypted by accessing the copyright management server in order to decrypt the content-specific attribute information 210, which is the AV stream information of the content necessary for content playback, and the encrypted content.
  • 3 XML documents including license acquisition information 220 necessary for acquiring a content key and the like, and network control information 230 necessary for reproduction control in the case of streaming VOD.
  • the network control information 230 is not necessary in the case of download distribution.
  • the content unique attribute information 210 includes the file name and reference destination 211 of the content main body file, the identification information 212 indicating whether the content is encrypted, the time length 213 of the content, the video encoding method, the resolution / scanning / aspect ratio, etc. It provides video signal attribute information 214, audio signal attribute information 215 such as stereo / mono / multi-channel distinction, and the like.
  • the content license acquisition information 220 includes copyright management server address information 221 as a license acquisition destination of the target content, copyright management method type information 223, a license ID 224 indicating the type of copyright protection range attached to the content, copyright Information such as the value 222 of the element to be signed and the reference destination 226, the license usage condition information 225, and the public key certificate 227 necessary for verifying a certain signature for performing server authentication between the management server and the client receiver. I will provide a.
  • the network control information 230 includes various streaming server function information such as information 231 on the available streaming protocol method, special playback and content cueing method 232, whether paused playback can be resumed from the middle, In the case where the function allows variable-speed playback in a plurality of stages, information 233 indicating the magnification for each stage and information 234 on the playback method are described.
  • a playback method a method that prepares and distributes a stream dedicated to variable-speed playback on the server side, a method that realizes pseudo high-speed playback by skipping and playing back still images included in the normal-speed playback stream, etc. Is done.
  • FIG. 11 shows a configuration example of the license 300.
  • a configuration of the license 300 that is acquired by referring to the download control information 100, or acquired at the start of content reproduction or export starts will be described.
  • the license includes a reproduction license 310 that describes a right to view a program and an export license 320 that describes a right to output to an external medium or network.
  • the license holds the encryption keys 311 and 321 of the content necessary for decrypting the content.
  • the use start date and use end date 312 the signal output restriction at the time of playback and the copy control information 313 have.
  • the use start date / time and use end date / time 312 can be designated indefinitely.
  • use condition information 322 such as copy restriction and analog output restriction when outputting to each medium can be designated.
  • the export license 320 can be exported once with one license, and N export licenses 320 are distributed from the DRM server 64 to the receiver 50 so that one content can be exported N times.
  • FIG. 12 is an example of a content search screen 1000 realized by the ECG processing unit 52.
  • Remote control On this screen, which is activated on this screen, choices such as keyword 1001, genre 1002, delivery date 1003, price 1004, provision form 1005, etc. and input fields are prepared.
  • the ECG metadata 400 is searched.
  • FIG. 13 is a display example of the search result screen 1100 displayed by the ECG processing unit 52.
  • a list of search results is displayed, and purchase or details 1104, VOD viewing 1105, and DL related buttons 1106 are displayed as title 1101, provision form 1102, purchase status 1103, and operation buttons for content.
  • the provision form column 1102 if the content is provided in the package metadata 450 only by VOD distribution (streaming distribution), “DL” if it is provided only by download distribution, if “DL” is provided by both. It is assumed that “VOD / DL” is displayed. VOD stands for Video On Demand.
  • VOD stands for Video On Demand.
  • the purchase status column 1103 information managed by the receiver, such as whether the content has been purchased by the user, not purchased, or free content, is presented.
  • the purchase or detail button 1104 displays a “purchase” button if the content has not been purchased, and displays a “detail” button if the content has been purchased or purchase is not required for free.
  • the “VOD viewing” button 1105 is displayed only when the content can be viewed by VOD (streaming). When this button is selected, VOD viewing is started.
  • the DL-related button 1106 is displayed only for downloadable content, and according to the state, download is instructed, but for content that has not yet been downloaded, a “DL waiting” button that cannot be operated is displayed, and download starts. When the download is completed, “DL viewing” is displayed. When the “DL viewing” button is selected, the downloaded content can be viewed. Even in “in DL”, there may be a receiver that enables viewing of content as long as it is buffered to some extent.
  • FIG. 14 is an example of a content purchase screen 1200 displayed by the ECG processing unit 52.
  • a content purchase screen 1200 is presented.
  • Title 1201, content 1202, director 1203, performer 1204, genre 1205, viewing deadline 1206, playback time and video / audio information 1207, number of exports and output destination information 1208 necessary for purchase of content, choice of providing form If 1209, price 1210, etc. are presented based on the ECG metadata 400 and the provision form 1209 is selectable, VOD, download, or both can be selected.
  • “VOD” is displayed as being invalid due to a strike-through line, and “Download” is displayed as valid.
  • a check mark indicates that the user has selected “download”.
  • FIG. 15 is an example of a content detail screen 1250 displayed by the ECG processing unit 52.
  • the content detail screen 1250 is presented by selecting the “detail” button on the search result screen 1100.
  • the displayed information is almost the same as the content purchase screen 1200, but since it has already been purchased, there is no “Purchase” button 1223. Instead, “VOD viewing” 1220, “Download viewing” 1221, “Export” 1222 Buttons are displayed, and the buttons are enabled and can be operated for the contents for which the respective functions are effective.
  • the provision form 1209 column cannot be selected because it has already been purchased, and only the provision form of the purchased content is displayed. For the contents that can be downloaded and viewed, the download progress status 1211 may be displayed. is there.
  • FIG. 16 shows an example of a content playback screen 1300 displayed by the ECG processing unit 52.
  • VOD viewing or download viewing is selected on the content search result screen 1100 or the content detail screen 1250, a content playback screen 1300 is presented.
  • the title banner 1302 displays the title of the content 1303, the playback time 1304, and detailed video / audio information 1305.
  • some receivers 1406 display the current reproduction position in the entire reproduction time depending on the receiver.
  • FIG. 17 is an example of an export screen 1400 displayed by the ECG processing unit 52.
  • an export screen 1400 is presented.
  • the content title 1401, capacity 1402, and the like are displayed based on the ECG metadata 400, and allowed output destination options 1403 and the remaining number of exports 1404 managed by the receiver are displayed.
  • the user selects an output destination and selects an “export destination check” button 1405, it is checked whether or not the content to be exported can be recorded on the export destination medium.
  • the cause is displayed in the status column 1407.
  • the ECG screen generated by the ECG processing unit 52 is configured.
  • the Web document 71 acquired from the Web server 61 can be presented by the browser 51 instead of the ECG processing unit 52, so that content search and reproduction can be performed.
  • FIG. 18 shows a transition example of the Web document 71 presented on the browser 51.
  • the browser 51 first displays the content sales portal page 1501 by accepting selection of a home page or bookmark when the browser 51 is activated.
  • the browser 51 displays a content list page 1502 of search results, and when content is selected from the search results, a content purchase page 1503 is displayed.
  • the browser 51 displays the VOD playback start page 1504 and VOD playback is instructed. Then, the playback control metafile 200 is referred to, and the content playback screen of FIG. 16 is displayed.
  • the browser 51 displays a download start page 1505.
  • the download start instruction is issued, the content is downloaded in the background based on the download control information 100. Start.
  • FIG. 19 shows an example of a local navigation screen 1600 displayed by the browser 51.
  • the status of the content that is downloaded and distributed is displayed on the local navigation screen 1600.
  • a list of contents that have been instructed to be downloaded or contents that have been downloaded are displayed, and a “Purchase” or “Details” button 1604 is displayed as an operation button for the content title 1601, download state 1602, purchase state 1603, and content.
  • a “view” button 1605 is displayed for contents that can be viewed as purchase conditions
  • an “export” button 1606 is displayed for contents that can be exported.
  • a search condition input field may be provided on the local navigation screen 1600 so that the search can be made within the range of the content instructed to be downloaded to the receiver 50 or the content already downloaded.
  • the local search screen shown in FIG. As in the navigation screen, “detail”, “view”, and “export” buttons may be provided.
  • the user it is possible for the user to search for desired content from the content stored in the receiver 50 and to perform processing such as export.
  • the ECG processing unit 52 performs processing when selection of an operation button or input of a search instruction is received from a user.
  • download status column 1602 “DL waiting” in which download is instructed but not yet downloaded, “download in progress” that displays the progress status of download, “DL completed” in which download is completed, and an error occurs during download Then, a status display such as “DL error” is displayed.
  • buttons such as unpurchased, purchased, and free are displayed.
  • a “purchase” button is displayed for unpurchased content
  • a “details” button is displayed for purchased content.
  • the viewing button becomes valid and can be selected when buffering has progressed to the extent that downloading is complete or playback is possible even during downloading.
  • an “export” button 1606 is displayed as valid and can be selected.
  • the screen transitions to the content viewing screen 1300, and when the “export” button 1606 is selected, the screen transitions to the export screen 1400.
  • the screen transitions to the export screen 1400.
  • FIG. 20 is a configuration example of an interface portion between the receiver and the removable medium.
  • a removable HDD such as iVDR (registered trademark) is assumed. However, it is not limited to iVDR.
  • solid arrows indicate the flow of content
  • broken arrows indicate the flow of control.
  • FIG. 20 shows a configuration example of the stream output processing unit 57 that performs export processing to a removable medium 560 having a copyright protection function.
  • the stream output control unit 57 of the receiver 50 includes a media authentication processing unit 541 that authenticates with removable media, a content key generation unit 543 that generates an encryption key for encrypting content to be transferred to the media, and encrypts content based on the content key.
  • Content encryption processing unit 542, and a key encryption processing unit 544 that encrypts and transfers the generated content key to a removable medium.
  • the content input to the content encryption processing unit 542 is input from the decryptor 514 or the demultiplexer 521 of the receiver 50.
  • the media authentication processing unit 541, the content key generation unit 543, the content encryption processing unit 542, and the key encryption processing unit 544 illustrated in FIG. 20 are all or partly integrated as a processing unit that performs each process. It can be realized by hardware by making it into a circuit.
  • the media authentication processing program 541, the content key generation program 543, the content encryption processing program 542, the key encryption processing program 544 and the like stored in the storage 550 or a storage device such as a memory (not shown) are controlled by a central control (not shown).
  • a central control not shown
  • processing with an arithmetic processor such as a unit all or a part of each processing can be realized by software.
  • each process realized by executing various programs by the central control unit or the like is described mainly with respect to each processing unit realized by the program.
  • each processing unit mainly performs each process.
  • the removable media 560 connected via the removable I / F 534 receives and decrypts the encrypted content key, the media authentication processing unit 561 that mutually authenticates with the media authentication processing unit 541 of the receiver 50.
  • the key decryption processing unit 563 for extracting the content key and the protected storage area 564 that can be read and written only by the mutually-reliable and reliable receiver 50 indicate the received content key and the usage conditions (the number of copies, the expiration date for use) of the content. Information is stored in association with content.
  • the number of times of copying indicates the number of recorded contents that can be further copied. If this number is M, M + 1 contents can be used in addition to the original contents body.
  • the use time limit indicates the use time limit of the content on the removable medium, and the following description method is possible. (1) Relative time from when content is written to removable media, etc. (2) Relative time from first access to content on removable media (3) Absolute use start date / time, use end date / time (any Can also be omitted, and the omitted start date and time and end date and time are considered to be unlimited) Note that the media authentication processing unit 561 and the key decryption processing unit 563 described in FIG. 20 are realized by hardware by integrating all or part of them as a processing unit for performing each process. Can do.
  • the media authentication processing program 561, the key decryption processing program 563, etc. stored in the data storage area 562, the protected storage area 564, a memory area (not shown), and the like are processed by an arithmetic processor such as a central control unit (not shown).
  • an arithmetic processor such as a central control unit (not shown).
  • a central control unit not shown
  • all or a part of each process can be realized by software.
  • each process realized by executing various programs by the central control unit or the like is described mainly with respect to each processing unit realized by the program.
  • each processing unit When each processing unit is realized by hardware, each processing unit mainly performs each process.
  • the content encrypted by the media encryption processing unit 542 is stored in the data storage area 562 through the removable I / F 534. It is conceivable that the media authentication processing unit 541 authenticates the reliability of the removable media 560 and authenticates the reliability of both the removable media 560 and the receiver 50 including the removable I / F 534.
  • the mutually authenticated receiver 50 reads the content stored in the removable medium 560
  • the content key of the content is read from the protected storage area 564, and the encrypted content read from the data storage area 562 is received. It can be used by decrypting the content key using the device 50.
  • FIG. 21 is a configuration example of an interface portion between the receiver and the network connection device.
  • FIG. 21 shows a configuration example of the stream output processing unit 57 that performs export processing via a network having a copyright protection function.
  • the stream output control unit 57 of the receiver 50 generates a communication key for encrypting content based on the communication authentication processing unit 545 that performs mutual authentication with the network connection device and the common key exchanged at the time of authentication.
  • the key generation unit 547 includes a communication encryption processing unit 546 that encrypts content based on the generated communication key and sends out the content via the communication I / F 510.
  • the communication authentication processing unit 545, the communication encryption processing unit 546, and the communication key generation unit 547 described in FIG. 21 are all integrated into a circuit as a processing unit that performs each processing. It can be realized with wear. Further, the communication authentication processing program 545, the communication encryption processing program 546, the communication key generation program 547 and the like stored in the storage device 550 or a storage device such as a memory (not shown) are processed by an arithmetic processor such as a central control unit (not shown). Thus, all or a part of each processing can be realized by software. In order to simplify the description, each process realized by executing various programs by the central control unit or the like is described mainly with respect to each processing unit realized by the program. When each processing unit is realized by hardware, each processing unit mainly performs each process.
  • the network connection device is connected to the network 580 via the communication I / F 571 and communicates with the receiver 50.
  • the communication authentication processing unit 572 performs mutual authentication with the communication authentication processing unit 545 of the receiver.
  • the communication key generation unit 574 generates a communication key for decrypting the content based on the common key exchanged at the time of authentication.
  • the communication decryption processing unit 573 decrypts the content received via the communication I / F 510 based on the generated communication key.
  • the content decrypted by the communication decryption processing unit 573 is encrypted by the local encryption processing unit 575 according to the encryption method of the network connection device 570 and stored in the data storage area 578 of the network connection device 570. Saved.
  • the encryption key at this time is generated by the local key generation unit 576, and information indicating the local key corresponding to the content and the usage condition (number of copies, expiration date for use) of the content can be accessed only by a trusted device or software. It is stored in the protected storage area 577.
  • the communication decryption processing unit 573, the communication key generation unit 574, the local encryption processing unit 575, and the local key generation unit 576 described in FIG. 21 are all or partly integrated as a processing unit that performs each process. It can be realized by hardware by making it into a circuit. Further, a communication decryption processing program 573, a communication key generation program 574, a local encryption processing program 575, a local key generation program 576, etc. stored in the data storage area 578, the protected storage area 577, a memory area (not shown), etc. By performing processing with an arithmetic processor such as a central control unit (not shown), all or part of each processing can be realized by software. In order to simplify the description, each process realized by executing various programs by the central control unit or the like is described mainly with respect to each processing unit realized by the program. When each processing unit is realized by hardware, each processing unit mainly performs each process.
  • the network connection device 570 has a device-specific data storage area 578. However, the network connection device 570 has a removable I / F 534 as the receiver 50 of FIG. The content may be transferred to the removable medium 560 via the removable I / F 534. In this case, the configuration of the network connection device 570 conforms to the configuration of the receiver 50 in FIG.
  • FIG. 22 is an example of a processing flow diagram 2000 of the ECG processing unit 52.
  • the ECG processing unit 52 acquires ECG metadata from the metadata server (2001), converts the acquired ECG metadata into a database that can be easily processed, stores it in the storage (2002), and displays the content search screen 1000. Present (2003).
  • the search condition is input and set (2004), and when a search execution is instructed, a search result screen 1100 is presented.
  • the ECG processing unit 52 displays the content purchase screen 1200 (2007).
  • the ECG processing unit 52 displays a content detail display screen 1250 (2009).
  • the content detail display screen 1250 is also displayed by selecting the “detail” button from the search result screen 1100.
  • the AV player When the user selects the “VOD viewing” button from the search result screen 1100, the AV player is activated and VOD viewing is started (2011). When the “DL viewing” button is selected, the AV player is activated and download viewing is started (2012).
  • the AV player is activated and VOD viewing is started (2011).
  • the “DL viewing” button is selected, the AV player is activated and download viewing is started (2012).
  • the “export” button is selected, the screen transitions to the export screen 1400 (2013).
  • FIG. 23 is an example of a processing flow of the stream output processing unit 57 when exporting content to the removable medium 560 on the export screen 1400.
  • the stream output processing unit 57 sets the output destination. It is checked whether the removable medium 560 is connected (2103). If not connected, an error message indicating unconnected is presented (2110).
  • the media authentication processing unit 541 confirms the authentication with the output destination removable medium 560 (2104), and performs a detailed check of the removable medium 560 (2105). If there is no abnormality for writing the content, a result indicating normality is presented (2106). If there is an abnormality, the cause of the error is presented (2110), and the operation returns to the operation accepting state on the export screen (2102). .
  • the errors at this time include an authentication error caused by the cause of the removable medium 560 or the receiver 50, an error of insufficient remaining capacity necessary for writing the content, and a speed error of the removable media 560 that does not satisfy the speed necessary for reproducing the content.
  • an authentication error caused by the cause of the removable medium 560 or the receiver 50 an error of insufficient remaining capacity necessary for writing the content
  • a speed error of the removable media 560 that does not satisfy the speed necessary for reproducing the content.
  • Various factors are conceivable, such as a storage format error when the file format specified by the removable medium 560 is not suitable for content storage, and a reading / writing error of the removable medium 560.
  • the stream output processing unit 57 checks whether the removable medium 560 is connected to the output destination (2107). If not connected, an error message indicating unconnected is presented (2110). If it is connected, the stream output processing unit 57 next confirms authentication with the output destination removable medium 560 (2108), and performs a detailed check of the output destination removable medium 560 (2109). Here, if there is an abnormality in writing the content, the cause of the error is presented (2110), and the operation reception state of the export screen is returned (2102). If there are no abnormalities, proceed to export processing.
  • the DRM client 54 acquires the export license 320 from the DRM server 64 (2118), and then the content key generation unit 543 generates a content key (2111).
  • the key encryption processing unit 544 encrypts the key and exchanges the key with the output destination removable medium 560 (2112).
  • the content key generation unit 543 sets a content key in the content encryption processing unit 542 (2113).
  • the content encryption processing unit 542 executes export processing to the removable medium 560 (2114).
  • the media authentication processing unit 561 performs processing such as saving the content key and content usage condition information to the removable medium 560, and updating the file management information. In other receivers and the like, the removable medium 560 can be read and written.
  • the cause of abnormal termination is presented (2117), and the export screen is displayed again ( 2101).
  • FIG. 24 is an example of a processing flow of the stream output processing unit 57 when exporting to the network connection device 570 on the export screen 1400.
  • the communication authentication processing unit 545 After presenting the export screen 1400 (2201), when an output destination is selected by an operation on the screen (2202) and an “export destination check” button is selected, the communication authentication processing unit 545 connects to the output destination via a network. It is checked whether or not the device 570 is connected (2203). If not connected, an error message indicating unconnected is displayed (2210). If connected, the communication authentication processing unit 545 next confirms authentication with the network connection device 570 that is the output destination (2204), and performs a detailed check of the network connection device 570 (2105). If there is no abnormality for writing the content, a normal result is presented (2106). If there is an abnormality, the cause of the error is presented (2110), and the operation returns to the operation accepting state on the export screen (2102).
  • the error in this case is also an authentication error caused by the cause on the network connection device 570 or the receiver 50 side, an error of insufficient remaining capacity on the network connection device 570 side necessary for storing the content,
  • Various errors such as a speed error of the network connection device 570 that does not satisfy the speed required for playback, a storage format error when the file format specified by the network connection device 570 is not suitable for storing contents, a device abnormality of the network connection device 570, etc. There are various factors.
  • the communication authentication processing unit 545 checks whether the removable medium 560 is connected to the output destination (2207). If not connected, an error message indicating unconnected is displayed (2210). If connected, next, the communication authentication processing unit 545 confirms the authentication with the output destination network connection device 570 (2208), and performs a detailed check of the output destination network connection device 570 (2209). Here, if there is an abnormality in writing the content, the cause of the error is presented (2210), and the operation reception state of the export screen is returned (2202). If there is no abnormality, the process proceeds to the export process.
  • the DRM client 54 acquires the export license 320 from the DRM server 64 (2218), and the communication key generated based on the key exchanged at the time of mutual authentication by the communication authentication processing unit 545 is converted into the communication encryption processing unit.
  • the communication encryption processing unit 546 executes export processing to the network connection device 570 (2214).
  • processing such as closing the communication session is performed in the export end processing (2216).
  • processing such as closing the communication session is performed in the export end processing (2216).
  • the cause of the abnormal termination is presented (2217), and the display returns to the export screen presentation. (2201).
  • FIG. 25 is an example of a processing flow diagram of the ECG processing unit 52 on the local navigation screen 1600 of FIG.
  • the ECG processing unit 52 reads the ECG metadata of the content of download distribution stored in a storage unit (not shown) (2301), and presents the local navigation screen 1600 based on the information (2302).
  • the ECG processing unit 52 displays the content purchase screen 1200 (2304).
  • the ECG processing unit 52 displays a content detail display screen 1250 (2306).
  • the content detail display screen 1250 is also displayed by selecting a “detail” button from the local navigation screen 1600.
  • the ECG processing unit 52 activates the AV player 53 to start downloading and viewing (2308).
  • the export screen 1400 is displayed. (2309).
  • the export screen is displayed. A transition is made to 1400 (2309).
  • the receiver 50 is connected to the network via the ECG displayed on the ECG processing unit 52, the Web screen displayed on the browser 51, or the local navigation 1600. Content can be acquired from and viewed.
  • the browser 51 may generate a content search screen or a local navigation screen and perform similar processing, or the AV player 53 may generate a content search screen or a local navigation screen and perform similar processing. .
  • FIGS. FIG. 26 shows an example in which the removable medium is an optical disk medium.
  • a media drive 580 is connected to the removable medium I / F 534, and the removable medium 585 is inserted into the media drive 580, and the Can read and write.
  • the stream output processing unit 57 includes a drive authentication processing unit 551, a content key generation unit 548, a key read / write processing unit 548, and a content encryption processing unit 550.
  • a removable medium 585 having a copyright protection function is inserted into a media drive 580 having a copyright protection function, it is possible to read and write the copyright-protected content, but the stream output control unit 57 of the receiver 50 Performs authentication processing between the authentication processing unit 581 of the media drive 580 and the drive authentication processing unit 551 as to whether or not the removable media 585 and the media drive 580 support copyright protection.
  • the key generated by the content key generation unit 548 is set in the content encryption processing unit 550, the content is encrypted and written to the removable medium 585, and the key is encrypted to the removable medium 585 through the key read / write processing unit 549.
  • Information indicating the media key used for conversion and content usage conditions (number of copies, expiration date for use) is written.
  • the drive authentication processing unit 551, the content key generation unit 548, the content encryption processing unit 550, and the key read / write processing unit 549 illustrated in FIG. 26 are all or partly integrated as a processing unit that performs each process. It can be realized by hardware by making it into a circuit. Further, a central control (not shown) controls a drive authentication processing program 551, a content key generation program 548, a content encryption processing program 550, a key read / write processing program 549, etc. stored in a storage device such as the storage 550 or a memory (not shown). By processing with an arithmetic processor such as a unit, all or a part of each processing can be realized by software. In order to simplify the description, each process realized by executing various programs by the central control unit or the like is described mainly with respect to each processing unit realized by the program. When each processing unit is realized by hardware, each processing unit mainly performs each process.
  • the media read / write unit 582 and the authentication processing unit 581 illustrated in FIG. 26 can be realized by hardware by integrating all or part of them as a processing unit that performs each processing. .
  • the media read / write program 582, the authentication processing program 581 and the like stored in a memory area (not shown) are processed by an arithmetic processor such as a central control unit (not shown) so that all or a part of each processing can be performed by software. Can also be realized.
  • each process realized by executing various programs by the central control unit or the like is described mainly with respect to each processing unit realized by the program.
  • each processing unit mainly performs each process.
  • FIG. 27 shows an example in which the removable medium is a memory card.
  • a removable medium 590 is directly connected to the removable medium I / F 534.
  • the stream output processing unit 57 includes a drive authentication processing unit 552, a content key generation unit 553, a key read / write processing unit 554, and a content encryption processing unit 555.
  • the direct removable medium 590 includes a general data storage area 591 and a protected storage area 592 that holds a key for encrypting data, and the drive authentication processing unit 552 protects whether the removable medium 590 is copyright protection-compatible. Judgment is made based on the presence / absence of the storage area 592, and after the authentication is established, the key generated by the content key generation unit 553 is set in the content encryption processing unit 555, and the content is encrypted and written to the data storage area 591 of the removable medium 590 Then, through the key read / write processing unit 554, the media key used in the protected storage area 592 and information indicating the usage conditions (the number of copies and the expiration date for use) are stored.
  • the media authentication processing unit 552, the content key generation unit 553, the content encryption processing unit 555, and the key read / write processing unit 554 illustrated in FIG. 27 are all or partly integrated as a processing unit that performs each process. It can be realized by hardware by making it into a circuit. Further, the media authentication processing program 552, the content key generation program 553, the content encryption processing program 555, the key read / write processing program 554, etc. stored in the storage 550 or a storage device such as a memory (not shown) are controlled by a central control (not shown). By processing with an arithmetic processor such as a unit, all or a part of each processing can be realized by software. In order to simplify the description, each process realized by executing various programs by the central control unit or the like is described mainly with respect to each processing unit realized by the program. When each processing unit is realized by hardware, each processing unit mainly performs each process.
  • the receiver 50 can export the copyright-protected content of the received content 75 to various types of removable media.
  • FIG. 28 is a configuration example of another receiver. Here, only a different part from the receiver shown in FIG. 3 is demonstrated.
  • reference numeral 551 denotes a conversion circuit for converting the digital compression encoding method of the content and conversion of the code bit rate
  • 552 is a changeover switch.
  • transcode when content is exported to the removable medium 560 or the like, the digital compression encoding method of the content and the code bit rate are converted (hereinafter, these conversion processes are collectively referred to as transcode). ) Is an example.
  • the conversion circuit 551 converts the content. Transcode, that is, digital compression encoding system conversion and code bit rate conversion are performed.
  • this conversion circuit 551 performs transcoding when it is desired to effectively use the storage capacity of the removable medium, for example, by converting to a lower code bit rate by the compression encoding method.
  • the video quality may be deteriorated due to the conversion to a low bit rate.
  • the content that has been transcoded by the conversion circuit 551 is recorded on the removable medium 560 via the stream output processing unit 57 and the removable medium I / F 534.
  • the changeover switch 552 can also export to the removable medium 560 without conversion by the conversion circuit 551.
  • FIG. 29 shows a command for requesting acquisition of the download control information 100 included in the Web document 71 when the browser 51 acquires the Web document 71 from the Web server 61 and displays the export screen based on the Web document 71 in this embodiment.
  • a character string 2901 is a command character string.
  • getDLC is a character string indicating an acquisition request for download control information.
  • the Web document 71 is sent from the Web server 61.
  • FIG. 30 is an example of a processing flow when the browser 51 generates and displays an export screen based on the Web document 71 including the command character string shown in FIG.
  • the browser 51 acquires the Web document 71 from the Web server 61 (3001), displays the screen title (3002), and in accordance with the Web document 71, the content title (3003), capacity (3004), output destination (3005), The number of remaining exports (3006) is displayed.
  • transcoding is determined from the character string 2903 of the command character string 2901 described with reference to FIG. 29 (3007).
  • a “transcode” button is displayed (3008). To indicate that the content should not be transcoded and exported, the “Transcode” button is not displayed.
  • an “export destination check” button display (3009), an export destination status display (3010), an “export start” button display (3011), an export progress display (3012), and a “cancel” button Display (3013) is performed. Then wait for the user's next instruction.
  • FIG. 31 shows an example of an export screen generated and displayed by the browser 51 based on the Web document 71 including the command character string shown in FIG.
  • the export screen 1450 is displayed.
  • a “transcode” button 1410 which is an option for selecting whether or not to perform transcoding by the conversion circuit 441 and the conversion rate is displayed, and the user selects this. Thus, the operation of transcoding at the time of export is determined.
  • FIG. 30 is a screen showing that the content may be transcoded and exported. When indicating that the content should not be transcoded and exported, the transcoding options are not displayed as in the export screen 1400 of FIG.
  • the export process is started.
  • the “export start” button 1406 is pressed by the user on the export screen 1450 shown in FIG. 31, the content is downloaded from the content server 63 by the downloader 55 via the communication I / F 510 and the communication processing unit 511, and is decrypted.
  • the data is either transcoded by the conversion circuit 551 described above or written directly to the removable media 560 via the stream output processing unit 57 and the removable media I / F 534 so that the export processing is performed directly. Is called.
  • the “transcode” button 1410 for selecting whether or not to transcode and export the display is switched when the browser 51 determines the character string 2903 in FIG. Whether or not transcoding is applied is determined by an instruction from the user.
  • FIG. 32 shows an example of the processing flow of the downloader 55 in this case.
  • the downloader 55 acquires the download control information 100 (3201), analyzes the download control information 100, and acquires a predetermined file from each server according to the described information. That is, it requests the metadata server specified by the URL of the location 157 of the ECG metadata of the download control information 100 to acquire the ECG metadata 400 (3202) using the HTTP protocol.
  • the metadata server holds ECG metadata corresponding to all contents to be distributed.
  • the metadata server A character string that uniquely identifies the content ID is added to the end of the URL, and an HTTP request is made.
  • the metadata server extracts and specifies the content ID from the requested URL character string.
  • An example in which ECG metadata corresponding to the set content ID is returned to the receiver can be considered.
  • the reproduction control metafile 200 specified by the URL of the reproduction control metafile location 158 of the download control information 100 is requested to the metadata server specified by this URL by the HTTP protocol, and the metadata server specifies these.
  • a file is acquired (3203).
  • the content 75 specified by the URL of the distribution content location 156 of the download control information 100 is acquired by requesting the content server specified by the URL by the HTTP protocol (3204), and stored in the storage 550 (3206). ) (3207) (3208).
  • the command character strings for requesting acquisition of the download control information 100 from the Web document shown in FIG. 29 the character string 2903 of the conversion permission / inhibition information indicating whether or not the content 75 can be transcoded and exported. Is also acquired (3205).
  • a protection process such as an encryption process is performed on the conversion enable / disable information (3209). Thereby, falsification of the conversion enable / disable information can be prevented.
  • this process can be realized by hardware by making it an integrated circuit or the like.
  • the processing can be realized by software by processing with an arithmetic processor such as a central control unit (not shown).
  • the protected conversion enable / disable information is associated with the content 75 and recorded, for example, in the storage 550 (3210).
  • the recording location of the conversion enable / disable information may be a non-volatile memory (not shown).
  • the accumulated content 75 can be searched for, selected, reproduced, or exported by the ECG processing unit 52 of the receiver.
  • the user selects a content to be exported from a list of contents instructed to be downloaded or contents already downloaded, and an “Export” button. Press.
  • the “export” button is selected by the user, the screen display of the browser 51 transitions to the export screen 1450.
  • the browser 51 reads a character string 2903 indicating whether or not the content recorded in the storage 550 in association with the content may be transcoded and exported, and accordingly, as described above, the “transcoding” ”Button is determined and displayed.
  • FIG. 33 shows an example of the processing flow of the browser 51 in this case.
  • the browser 51 acquires the ECG metadata from the storage 550 (3301), displays the screen title (3302), the content title (3303), the capacity (3304), the output destination (3305), and the remaining number of exports (3306). Is displayed.
  • the browser 51 acquires from the storage 550 conversion enable / disable information indicating whether or not transcoding is possible and is recorded in the storage 550 in association with the content described in step 3210 of FIG. 32 (3314).
  • the conversion permission / inhibition information is decrypted (3315).
  • this process is not shown, it can be realized by hardware by making it an integrated circuit or the like.
  • the processing can be realized by software by processing with an arithmetic processor such as a central control unit (not shown). Then, the browser 51 determines transcoding from the acquired conversion permission / inhibition information (3307). If the conversion permission / inhibition information indicates that the content may be transcoded and exported, a “transcode” button is displayed (3308). If the conversion permission / inhibition information indicates that the content should not be transcoded and exported, the browser 51 does not display the “transcode” button.
  • the browser 51 displays an “export destination check” button (3309), an export destination status display (3310), an “export start” button display (3311), an export progress status display (3312), “ The “stop” button is displayed (3313), and then the next instruction from the user is awaited.
  • the stream output processing unit 57 sets the content key in the decryptor 514 by the DRM client 54, and reads the content to be exported from the storage 550.
  • the content read from the storage 550 is decrypted by the decryptor 514 and then transcoded by the conversion circuit 551 described above, or is directly sent to the removable media 560 via the stream output processing unit 57 and the removable media I / F 534.
  • Export processing is performed by writing.
  • FIG. 34 is an example of the processing flow of the stream output processing unit 57 when exporting content to the removable medium 560 in this embodiment.
  • the stream output processing unit 57 removes the output destination as a removable destination. It is checked whether the medium 560 is connected (3403). If not connected, an error message indicating unconnected is presented (3410).
  • the media authentication processing unit 541 confirms the authentication with the output destination removable media 560 (3404), and performs a detailed check of the removable media 560 (3405). If there is no abnormality for writing the content, a result indicating normality is presented (3406). If there is an abnormality, the cause of the error is presented (3410), and the operation returns to the operation accepting state on the export screen (3402). .
  • the errors at this time include an authentication error caused by the cause of the removable medium 560 or the receiver 50, an error of insufficient remaining capacity necessary for writing the content, and a speed error of the removable media 560 that does not satisfy the speed necessary for reproducing the content.
  • an authentication error caused by the cause of the removable medium 560 or the receiver 50 an error of insufficient remaining capacity necessary for writing the content
  • a speed error of the removable media 560 that does not satisfy the speed necessary for reproducing the content.
  • Various factors are conceivable, such as a storage format error when the file format specified by the removable medium 560 is not suitable for content storage, and a reading / writing error of the removable medium 560.
  • a “transcode” button is displayed on the export screen 1450.
  • the stream output processing unit 57 sets the conversion circuit 551 and the changeover switch 552 according to whether or not to perform transcoding according to a user instruction and at what bit rate to convert (3419). . If the content should not be transcoded and exported, this “transcode” button will not be displayed. Alternatively, a “transcode” button may be displayed and a mask may be displayed so that it cannot be selected.
  • the stream output processing unit 57 checks whether the removable medium 560 is connected to the output destination (3407). If not connected, an error message indicating unconnected is presented (3410). If connected, the stream output processing unit 57 next confirms authentication with the output destination removable medium 560 (3408), and performs a detailed check of the output destination removable medium 560 (3409). Here, if there is an abnormality in writing the content, the cause of the error is presented (3410), and the operation reception state on the export screen is returned (3402). If there are no abnormalities, proceed to export processing.
  • the DRM client 54 acquires the export license 320 from the DRM server 64 (3418), and then the content key generation unit 543 generates a content key (3411).
  • the key encryption processing unit 544 encrypts the key and exchanges the key with the output destination removable medium 560 (3412).
  • the content key generation unit 543 sets a content key in the content encryption processing unit 542 (3413).
  • the content encryption processing unit 542 exports the content input from the changeover switch 552 to the removable medium 560 (3414).
  • the media authentication processing unit 561 When the export is completed (3415), in the export end process (3416), the media authentication processing unit 561 performs processing such as saving the content key and content usage condition information to the removable medium 560, and updating the file management information. In other receivers and the like, the removable medium 560 can be read and written. Before the export is completed, if the user cancels the instruction or the removable medium 560 is abnormal and the export is not completed normally, the cause of the abnormal termination is presented (3417), and the export screen is displayed again ( 3401).
  • the downloaded content when the downloaded content is exported, it is determined whether or not it is possible to transcode and export, and in the browser 51, the display of the “transcode” button is determined, so that the user convenience Increase. Also, the content right holder can maintain the quality of the content under the management.
  • this invention is not limited to the above-mentioned Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
  • each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
  • Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
  • Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
  • control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

Abstract

La présente invention se rapporte à un dispositif de réception qui reçoit, sur un réseau, un élément de contenu numérique contenant un signal vidéo et un signal audio. Le signal vidéo et le signal audio ont été soumis à un codage par compression numérique. L'élément de contenu numérique contient également des informations de convertibilité qui indiquent s'il est possible ou non de convertir le schéma de codage par compression numérique du contenu numérique et/ou le débit binaire du codage. D'autre part, le dispositif de réception selon l'invention affiche des alternatives pour sélectionner s'il faut ou non exécuter la conversion quand il est déterminé que les informations de convertibilité indiquent que la conversion est possible, ou bien il n'affiche pas les alternatives pour sélectionner s'il faut ou non exécuter la conversion quand il est déterminé que les informations de convertibilité indiquent que la conversion n'est pas possible.
PCT/JP2012/061534 2011-05-13 2012-05-01 Dispositif de réception et procédé de réception WO2012157446A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-107838 2011-05-13
JP2011107838A JP5470324B2 (ja) 2011-05-13 2011-05-13 受信装置、および受信方法

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WO2012157446A1 true WO2012157446A1 (fr) 2012-11-22

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JP (1) JP5470324B2 (fr)
WO (1) WO2012157446A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1173376A (ja) * 1997-08-29 1999-03-16 Canon Inc 記録再生装置、ファイル変換装置および情報のファイル変換禁止システム
JP2010283869A (ja) * 2010-08-04 2010-12-16 Hitachi Consumer Electronics Co Ltd ネットワーク配信機能付き電子機器及びネットワーク配信方法
JP2011076494A (ja) * 2009-09-30 2011-04-14 Fujitsu Toshiba Mobile Communications Ltd 電子機器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1173376A (ja) * 1997-08-29 1999-03-16 Canon Inc 記録再生装置、ファイル変換装置および情報のファイル変換禁止システム
JP2011076494A (ja) * 2009-09-30 2011-04-14 Fujitsu Toshiba Mobile Communications Ltd 電子機器
JP2010283869A (ja) * 2010-08-04 2010-12-16 Hitachi Consumer Electronics Co Ltd ネットワーク配信機能付き電子機器及びネットワーク配信方法

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