WO2019245318A1 - Appareil et procédé de traitement de contenu fondé sur un système d'accès conditionnel - Google Patents

Appareil et procédé de traitement de contenu fondé sur un système d'accès conditionnel Download PDF

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Publication number
WO2019245318A1
WO2019245318A1 PCT/KR2019/007492 KR2019007492W WO2019245318A1 WO 2019245318 A1 WO2019245318 A1 WO 2019245318A1 KR 2019007492 W KR2019007492 W KR 2019007492W WO 2019245318 A1 WO2019245318 A1 WO 2019245318A1
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WIPO (PCT)
Prior art keywords
cas
ecm
broadcast
content
information
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PCT/KR2019/007492
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English (en)
Korean (ko)
Inventor
사이먼 왈러아서
노튼-그린조나단
Original Assignee
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from GB1810287.1A external-priority patent/GB2575032B/en
Application filed by 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Priority to US17/254,675 priority Critical patent/US11368755B2/en
Priority to CN201980041825.9A priority patent/CN112335253B/zh
Priority to EP19822727.4A priority patent/EP3787297A4/fr
Publication of WO2019245318A1 publication Critical patent/WO2019245318A1/fr

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    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • 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
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
    • 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
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/4722—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting additional data associated with the content
    • H04N21/4725—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting additional data associated with the content using interactive regions of the image, e.g. hot spots

Definitions

  • the present disclosure relates to an apparatus and a method for processing content based on a reception restriction system (CAS).
  • CAS reception restriction system
  • Broadcast content such as a TV or radio program
  • broadcasters may wish to apply some form of protection to broadcast content such that only authorized recipients can access the content.
  • Conditional Access System is a reception restriction system capable of providing conditional restricted reception services.
  • the reception restriction system is a system in which a subscriber who is authorized to receive a scrambled signal transmitted from a broadcast transmitter can watch a program by descrambling the signal received by the broadcast receiver. Therefore, the CA may differentiate and provide a channel that can be accessed according to a cost paid for a broadcast service or content, or provide a differentiated type or quality of content.
  • the reception restriction system may be embedded or implemented in an external device such as a common interface conditional access module (CICAM).
  • CICAM common interface conditional access module
  • the embedded CAS software needs to be updated frequently throughout the life of the TV as a result of the CAS change.
  • Some embodiments may provide an apparatus and method for processing content based on a reception restriction system by providing an Entitlement Control Message (ECM) that may be decoded by a broadcast receiving device.
  • ECM Entitlement Control Message
  • a method includes: receiving a broadcast stream including encrypted content based on a conditional access system (CAS); Extracting CAS information for decrypting the encrypted content from the received broadcast stream; Receiving an Entitlement Control Message (ECM) having a preset format based on the CAS information generated in different formats for each broadcaster; And displaying the content decoded on the basis of the ECM.
  • CAS conditional access system
  • ECM Entitlement Control Message
  • the ECM may be received from an external electronic device.
  • the displaying may further include decoding the content using the control information generated based on the ECM.
  • the CAS information may include identification information for identifying at least one of a plurality of CASs and ECM information related to a right to receive the content.
  • the operating method of the broadcast receiving device may include generating a hash based on the ECM information; And generating a URL based on the hash and the identification information.
  • the receiving may include receiving the ECM based on the URL.
  • the receiving may include retrieving the external electronic device corresponding to the URL; And receiving the ECM corresponding to the CAS information from the external electronic device.
  • the method includes encrypting content based on a conditional access system (CAS); Generating CAS (Conditional Access System) information for decoding the content; Generating an Entitlement Control Message (ECM) in a predetermined format based on the CAS information; Transmitting a broadcast stream including the content and the CAS information to a broadcast receiving device; And transmitting the ECM to the broadcast reception device at the request of the broadcast reception device.
  • CAS conditional access system
  • ECM Entitlement Control Message
  • the transmitting of the ECM to the broadcast receiving device may include transmitting the ECM to the broadcast receiving device through an external electronic device.
  • the encrypting step may include generating control information based on the reception restriction system; And encrypting the content using the control information.
  • the CAS information may include identification information for identifying at least one of a plurality of CASs and ECM information related to a reception qualification of the content.
  • a display device includes: a display; Communication unit; A memory for storing at least one instruction; And at least one processor controlling the broadcast receiving apparatus by executing the at least one instruction, wherein the at least one processor includes content encrypted based on a conditional access system (CAS).
  • ECM Entitlement Control
  • a broadcast receiving device for receiving a message) and displaying the content decoded based on the ECM is provided.
  • a communication unit A memory for storing at least one instruction; And at least one processor controlling the broadcast providing device by executing the at least one instruction;
  • the at least one processor may include: encrypting content based on a conditional access system (CAS), generating CAS (Conditional Access System) information for decrypting the content, and adding the CAS information to the CAS information.
  • CAS conditional access system
  • ECM Entitlement Control Message
  • a broadcast providing device that transmits to a device.
  • CAS conditional access system
  • FIG. 1 illustrates a broadcast providing system including a broadcast receiving device and a broadcast providing device according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart illustrating a method of providing broadcast content according to an embodiment of the present disclosure
  • FIG. 3 is a flowchart illustrating a method of receiving broadcast content according to an embodiment of the present disclosure
  • FIG. 4 illustrates a broadcast providing system including a broadcast providing device, a server, and a broadcast receiving device according to an embodiment of the present disclosure
  • FIG. 5 illustrates a broadcast receiving device connected to a data storage device for updating a CASID and / or a server URL according to an embodiment of the present disclosure.
  • FIG. 6 is a diagram illustrating a system for processing content based on a CAS according to an embodiment of the present disclosure.
  • FIG. 7 is a flowchart illustrating a method of operating a broadcast reception device according to an embodiment of the present disclosure.
  • FIG. 8 is a flowchart illustrating a method of operating a broadcast providing apparatus according to an embodiment of the present disclosure.
  • FIG. 9 is a flowchart illustrating a method of operating a server according to an exemplary embodiment.
  • FIG. 10 is a flowchart illustrating a data transmission / reception method between devices according to an embodiment of the present disclosure.
  • FIG. 11 is a block diagram illustrating an internal configuration of a broadcast reception device according to an embodiment of the present disclosure.
  • FIG. 12 is a block diagram specifically illustrating an internal configuration of a broadcast reception device according to an embodiment of the present disclosure.
  • FIG. 13 is a block diagram illustrating an internal configuration of a broadcast providing apparatus according to an embodiment of the present disclosure.
  • FIG. 14 is a block diagram illustrating an internal configuration of a server according to an embodiment of the present disclosure.
  • Some embodiments may be represented by functional block configurations and various processing steps. Some or all of these functional blocks may be implemented in various numbers of hardware and / or software configurations that perform particular functions.
  • the functional blocks of the present disclosure may be implemented by one or more processors or microprocessors, or by circuit configurations for a given function.
  • the functional blocks of the present disclosure may be implemented in various programming or scripting languages.
  • the functional blocks may be implemented in algorithms running on one or more processors.
  • the present disclosure may employ the prior art for electronic configuration, signal processing, and / or data processing. Terms such as module and configuration may be widely used and are not limited to mechanical and physical configurations.
  • connecting lines or connecting members between the components shown in the drawings are merely illustrative of functional connections and / or physical or circuit connections. In a real device, the connections between components may be represented by various functional connections, physical connections, or circuit connections that are replaceable or added.
  • a conditional access system is a reception restriction system capable of satisfying a conditional restricted reception service. Only a subscriber authorized to receive a scrambled signal transmitted from a broadcast transmitter descrambles a signal received from a broadcast receiver. It is a system that allows you to watch a program.
  • the reception restriction system protects the broadcast contents by encrypting the broadcast contents in various pay broadcasting service environments such as IPTV, digital cable, satellite, and DMB, so that only authorized subscribers can normally watch the paid broadcast contents.
  • the reception restriction system will be referred to as CAS.
  • a CAS has been developed in which content is scrambled at the transmitter based on a control word (CW), and the data used to derive the control word is transmitted to the broadcast stream along with the scrambled content. Accordingly, a receiver having predetermined software installed may derive the correct control word from the received data and descramble the content using the generated control word.
  • CW control word
  • a broadcast providing system including a broadcast providing device and a broadcast receiving device is shown.
  • 2 and 3 are flowcharts illustrating methods performed by the broadcast providing device and the broadcast receiving device, respectively.
  • the broadcast receiving device 110 may be embedded in various forms, such as a TV or a set-top-box (STB).
  • STB set-top-box
  • the broadcast receiving device 110 is configured to receive a broadcast stream from the broadcast providing device 100.
  • the broadcast stream may be received via a wireless or wired connection.
  • the broadcast stream may be a multiplex stream including a plurality of multiplex broadcast services.
  • any number of multiplex services include content protected with CAS, and different reception restriction systems may be used with different services within the broadcast stream.
  • the broadcast providing device 100 may include a CAS unit 101, a broadcast stream transmitter 102, and a communication unit 103.
  • the CAS unit 101 is configured to receive content protected using CAS and may scramble the received content referred to herein as CAS protected content to generate scrambled content.
  • the CAS unit 101 may also be configured to generate CAS data for accessing CAS protected content and to generate a content access key for generating a control word for descrambling the CAS protected content.
  • the broadcast stream transmitter 102 may be configured to transmit a broadcast stream including CAS protected content and generated CAS data.
  • CAS information may include CAS data for accessing CAS protected content.
  • the broadcast providing device 100 receives content protected using CAS, scrambles the received content to generate CAS protected content, and generates content access to generate a control word for descrambling the CAS protected content.
  • a request for a content access key associated with the CAS data a reception restriction system CAS unit 101 configured to generate a key, a broadcast stream transmitter 102 configured to transmit a broadcast stream comprising CAS protected content and CAS data
  • a communication unit 103 configured to provide a content access key generated in response to the received request.
  • the CAS unit 101 may be configured to transmit scrambled content and CAS data to the broadcast stream transmitter 102.
  • the CAS unit 101 is configured to provide CAS data in the form of a CAS Entitlement Control Message (ECM), although in other embodiments CAS data may be provided in different formats. have.
  • ECM CAS Entitlement Control Message
  • the CAS entitlement control message generated by the broadcast providing device 100 will be referred to as CAS ECM.
  • the CAS unit 101 may be configured to provide a content access key in the form of a TV key ECM according to the TV key standard. However, in other embodiments, the content access key may be provided in different formats.
  • the broadcast providing device 100 may be configured to store a TV Key ECM in association with information for identifying CAS data related to a content access key.
  • the broadcast receiving device 110 is a TV.
  • the TV Key ECM may have a standardized format defined by the TV Key.
  • the CAS ECM may be generated in a different format for each broadcaster or CAS vendor, so that the broadcast reception device 110 may not directly decode the CAS ECM.
  • the broadcast receiving device 110 since the TV Key ECM has a standardized format defined by the TV Key, the broadcast receiving device 110 may directly decode the TV Key ECM.
  • the broadcast providing device 100 Since the broadcast providing device 100 stores the TV Key ECM in association with information for identifying CAS data related to the content access key, the broadcast providing device 100 responds to a request including information for identifying CAS data from the broadcast receiving device 110. After that, the TV key ECM may be retrieved and the retrieved TV key ECM may be provided to the broadcast receiving device 110 through the communication unit 103.
  • the CAS information may include information for identifying CAS data. .
  • the information for identifying the CAS data may be the CAS ECM itself or may be in the form of any other suitable identifier.
  • the TV KEY ECM may be stored together with the CAS ECM in a lookup table (LUT).
  • the information used to identify the CAS data may be derived from the CAS ECM using a specific transformation known to both the broadcast providing device 100 and the broadcast receiving device 110.
  • the modification includes a hash function, and the broadcast providing device 100 may be configured to store a TV ECM associated with the modification data derived from a hash of the CAS ECM, in particular, the CAS ECM.
  • different forms of modified data may be used, such as an encrypted version of CAS ECM.
  • the broadcast reception device 110 may include a broadcast stream receiver 111, a communication unit 112, a control word generator 113, and a content descrambling unit 114.
  • the broadcast stream receiving unit 111 may be configured to receive a broadcast stream including CAS data and scrambled content including the CAS ECM in one embodiment of the present disclosure.
  • the broadcast stream receiving unit 111 may be configured to extract CAS data and deliver the CAS data to the communication unit 112.
  • the broadcast receiving device 110 is configured to receive a broadcast stream and extract the reception restriction system CAS data from the received broadcast stream, wherein the CAS data includes data for accessing CAS protected content included in the broadcast stream.
  • Control configured to generate a control word for descrambling CAS protected content based on the retrieved content access key
  • the stream receiving unit 111 the communication unit 112 configured to retrieve the content access key associated with the extracted CAS data from the server
  • a descrambler 114 configured to descramble CAS protected content using the generated control word.
  • the broadcast stream receiver 111 is configured to obtain an identifier ID from the received broadcast stream, and the communication unit 112 identifies the server to retrieve the content access key according to the ID obtained by the broadcast stream receiver 111. It can be configured to.
  • the identifier ID may include a reception restriction system identifier CAS ID for identifying one of the plurality of reception restriction systems associated with the received CAS data.
  • the identifier ID may include a broadcast service identifier for identifying one of the multiplexed services included in the broadcast stream.
  • the broadcast receiving device 110 further includes a memory (not shown) configured to store a plurality of server URLs respectively associated with one of the plurality of identifiers, and the communication unit 112 includes an identifier obtained by the broadcast stream receiving unit 111. It may be configured to identify a server for retrieving the content access key by selecting a server URL stored associated with the ID.
  • the content access key refers to a key for decoding content and may correspond to an ECM generated in a predetermined format.
  • the content access key may correspond to an ECM having a standardized format defined by a key of the broadcast reception device 110.
  • the communicator 112 may be configured to communicate with the broadcast providing device 100 through the communicator 103 to retrieve a content access key associated with the extracted CAS data. Therefore, according to an embodiment of the present disclosure, the broadcast providing device 100 may operate as a server providing the requested content access key to the broadcast receiving device 110 as needed.
  • the first and communication units 103, 112 may communicate via any suitable connection. For example, the first and communication units 103, 112 may communicate using the Internet Protocol (IP) via a suitable network connection.
  • IP Internet Protocol
  • the control word generator 113 descrambles the CAS protected content based on the TV Key ECM. Generate a control word for the control word.
  • the descrambling unit 114 may then be configured to descramble the CAS protected content using the generated control word. In this manner, the broadcast reception device 110 may obtain content that is not scrambled. For example, unscrambled content may then be output to a display and / or audio system, or stored for later playback, depending on the type of content.
  • the content access key may be provided in a standardized format, which means that the control word generator 113 uses the same method to generate the control word from the content access key regardless of the CAS system used to protect the CAS content. Can mean.
  • the broadcast receiving device 110 may be a CAS ECM, for example, a proprietary. (proprietary) broadcast ECMs can be converted into standardized content access keys such as TV key ECMs. This may allow the broadcast receiving device 110 to in turn access the CAS protected content even if the broadcast receiving device 110 does not have specific software for the particular CAS installed.
  • FIG. 2 is a flowchart illustrating a method of providing broadcast content according to an embodiment of the present disclosure.
  • the broadcast providing device 100 may receive content protected using a CAS.
  • the CAS unit 101 of the broadcast providing device 100 receives content protected using CAS.
  • the CAS unit 101 may scramble the received content to generate content protected by CAS.
  • the CAS unit 101 may generate a content access key for generating CAS data for accessing the CAS protected content and a control word that may be used for descrambling the CAS protected content.
  • step S203 may be performed before step S202 or steps S202 and S203 may be performed in parallel, ie substantially simultaneously.
  • the broadcast stream transmitter 102 may transmit a broadcast stream including the CAS-protected content and the generated CAS data.
  • steps S203 and S204 may be performed in parallel, ie substantially simultaneously.
  • the broadcast stream transmitter 102 may transmit CAS protected content and generated CAS data as soon as they are received from the CAS unit 101 and may not need to wait for the content access key to be generated.
  • the communication unit 103 may receive a request for a content access key associated with the CAS data transmitted in step S204. In response to the received request, in operation S206, the communication unit 103 may provide the content access key to the broadcast reception device 110.
  • the content access key may include or correspond to a TV Key ECM.
  • FIG. 3 is a flowchart illustrating a method of receiving broadcast content according to an embodiment of the present disclosure.
  • the broadcast stream receiver 111 may receive a broadcast stream.
  • the broadcast stream receiver 111 may extract CAS data from the received broadcast stream.
  • the communication unit 112 may communicate with the broadcast providing device 100 through the communication unit 103 to retrieve a content access key associated with the extracted CAS data.
  • the communication unit 112 may communicate with the broadcast providing device 100 as follows. First, whenever a new ECM for this CAS is received via a broadcast stream, the broadcast receiving device 100 may generate a hash of the ECM using a specific algorithm. Secondly, the communication unit 112 may form a Uniform Resource Locator (URL) by combining the textual version of the hashed CAS ECM with the pre-provided URL of the communication unit 103, which may be referred to as the "root" URL. Third, the communication unit 112 may transmit a request for the content access key to the obtained URL.
  • URL Uniform Resource Locator
  • the broadcast reception device 110 may retrieve an external electronic device for receiving a content access key associated with CAS data.
  • the communication unit 112 communicates with a server, in which case the broadcast providing device 100 combines the root URL with a hash of the CAS ECM, so that in other embodiments the communication unit 112 is configured to provide content.
  • the communication unit 112 may include a hash of the CAS ECM in the body of the request sent to the root URL without modifying the root URL.
  • a copy of the received CAS ECM may be included in the body of the request sent to the server without being hashed.
  • communication unit 112 may combine the root URL with the ID received via the broadcast stream instead of combining the root URL with the hash of the CAS ECM. It will be appreciated that the above examples are merely provided to illustrate different ways in which communication unit 112 communicates with a server to retrieve a content access key, and other approaches may be used in other embodiments.
  • control word generator 113 may generate a control word for descrambling the CAS protected content based on the retrieved content access key.
  • the content descrambling unit 114 may descramble the content protected by the CAS using the generated control word.
  • the method may further comprise outputting descrambled content for audio and / or video playback, or as described above, storing the descrambled content for later playback. .
  • the methods performed by the broadcast providing device 100 and the broadcast receiving device 110 may be implemented in hardware or software, or may be implemented using a combination of hardware and software.
  • the broadcast providing device 100 may include a memory in the form of any suitable computer-readable storage medium that, when executed, stores computer program instructions for performing the method described above with reference to FIG. 2.
  • the broadcast receiving device 110 when executed, may comprise a memory in the form of any suitable computer-readable storage medium storing computer program instructions for performing the method described above with reference to FIG. It may be.
  • FIG. 4 illustrates a broadcast providing system including a broadcast providing device, a server, and a broadcast receiving device according to an embodiment of the present disclosure.
  • 5 illustrates a broadcast reception device connected to a data storage device for updating a CASID and / or a server URL according to an embodiment of the present disclosure.
  • FIG. 4 a broadcast providing system including a broadcast providing device, a server, and a broadcast receiving device according to an embodiment of the present disclosure is illustrated. Many aspects of the broadcast providing system of FIG. 4 are similar to those of the broadcast providing system described above with reference to FIGS. 1, 2, and 3, and for simplicity a detailed description of similar features will not be repeated herein. In some embodiments, aspects of the two broadcast providing systems shown in FIGS. 1 and 4 may be combined in a single embodiment.
  • the broadcast providing device 400 may include a CAS unit 401a, 401b, and 401c, a broadcast stream transmitter 402, and a communication unit (not shown). It may include.
  • the CAS units 401a, 401b, and 401c may include a control word generator 401a configured to generate a control word, and a scrambling unit 401b configured to scramble content using the generated control word.
  • a CAS ECM generator 401c configured to generate CAS data and content access keys.
  • the communication unit 403 may be embedded in the server 420 physically separated from the broadcast providing device 400 including the broadcast stream transmitter 402.
  • the server 420 may include a memory 421 configured to receive and store a content access key and CAS data from the CAS ECM generation unit 401c through the communication unit 403.
  • the memory 421 may store the content access key along with information for identifying CAS data associated with the content access key to allow a suitable content access key to be retrieved later in response to a request from the broadcast receiving device 410. Can be.
  • the broadcast providing device 410 of the embodiment of the present disclosure includes a broadcast stream receiving unit 411, a communication unit 412, a control word generator 413, and a content descrambler ( 414).
  • the broadcast stream receiver 411 is configured to obtain an identifier (ID) from the received broadcast stream, and the communication unit 412 identifies the server 420 for retrieving the content access key according to the ID. And receive the ID obtained by the broadcast stream receiving unit 411.
  • the ID may include a CAS ID that identifies one of the plurality of conditional access systems associated with the received CAS data.
  • identifiers may be used to select server 420.
  • the communication unit 412 may be configured to select the server 420 according to a broadcast service identifier that identifies one of a plurality of multiplexed services included in the broadcast stream.
  • the appropriate CAS server may be automatically selected according to the broadcast service. This approach may be used if a particular broadcast service always uses the same CAS to protect the content.
  • DVD Digital Video Broadcasting
  • a broadcast service identifier may be extracted from a DVB triplet.
  • the broadcast receiving device 410 may further include a memory 417 configured to store a plurality of server URLs each associated with one of a plurality of identifiers such as a CAS ID or a broadcast service ID. .
  • the communication unit 412 selects the server URL stored in association with the ID obtained by the broadcast stream receiving unit 411 to identify the server 420 to be used when retrieving the content access key for the current CAS protected content. Can be configured.
  • the broadcast receiving device 410 can operate with a plurality of different CASes and access content for content protected by CAS currently being received by the broadcast stream receiving unit 411. It may automatically select the appropriate server 420 to provide the key.
  • the broadcast reception device 410 may further include a CAS manager 416 configured to update the plurality of server URLs by obtaining a new server URL and storing the obtained new server URL in a memory.
  • a CAS manager 416 configured to update the plurality of server URLs by obtaining a new server URL and storing the obtained new server URL in a memory.
  • the CAS manager 416 may obtain a new server URL and, if applicable, a corresponding identifier, such as a CAS ID, in different ways according to embodiments of the present disclosure.
  • CAS manager 416 may be configured to obtain a new URL from metadata included in the received broadcast stream.
  • CAS manager 416 may be configured to obtain a new server URL from an internet server via communicator 412.
  • the CAS management unit 416 is a local data storage device connected to a universal serial bus (USB) memory stick, broadcast receiving device 510, for example, as shown in FIG. 5. It may be configured to obtain a new server URL from 530.
  • USB universal serial bus
  • the CAS manager 416 may be configured to replace the old server URL of one of the plurality of reception restriction systems with a new server URL to store the new server URL.
  • the CAS manager 416 may be configured to obtain a CAS ID of the new reception restriction system associated with the new server URL and store the obtained CAS ID in association with the new server URL in the memory 417.
  • the CAS manager 416 may be configured to obtain a new server URL from metadata included in the received broadcast stream.
  • the CAS manager 416 may be configured to obtain a new server URL via the communicator 416.
  • the CAS manager 416 may be configured to obtain a new server URL from a local data storage device connected to the broadcast reception device 410.
  • the broadcast receiving device 410 further includes a hashing unit 415 configured to apply the transform to the received CAS data to obtain the transformed data, and the communication unit 416 includes a server 420 to retrieve the content access key. May be configured to transmit the converted data.
  • the broadcast stream receiving unit 411 may be configured to extract a CAS control message from the received broadcast stream, and the CAS control message may include CAS data for accessing CAS protected content.
  • a content access key (eg, TV Key ECM) may be stored in association with data other than the original CAS ECM, such as modified data derived from the CAS ECM. It may be.
  • the server 420 may be configured to receive the modified data from the CAS ECM generator 401c.
  • the server 420 may be configured to receive original CAS data, in this case CAS ECM, from the CAS ECM generator 401c shown in FIG. 4.
  • a suitable modification may be applied to the server 420 before storing the modified data in memory 421.
  • the hash modification is used, and the broadcast receiving device 410 is a hashing unit 415 configured to apply a hashing function to the received CAS data to obtain the modified data in the form of a CAS ECM hash. ) May be further included.
  • the entire CAS ECM may be hashed, or only a portion of a predefined CAS ECM may be hashed. If only a portion of the CAS ECM is hashed, the same portion of the predefined CAS ECM may have to be used to generate a hash stored in memory 421 at server 420.
  • the communication unit 420 may be configured to transmit a hash of the CAS ECM to the server 420 for retrieving the TV Key ECM.
  • the hash function Since the output of the hash function contains less data than the original input data in the case of CAS ECM, the hash function is used to convert the CAS ECM to the amount of data transmitted between the first and communication units 402, 403. The amount of data stored in the memory 421 can be reduced.
  • FIG. 6 is a diagram illustrating a system for processing content based on a CAS according to an embodiment of the present disclosure.
  • the system may include a broadcast providing device 610, a broadcast receiving device 620, and a standardized ECM providing server 630.
  • the broadcast providing device 610 may be a broadcaster head-end (a broadcast server including a video encoder, a multiplexer, a transmission system, and the like).
  • the broadcast providing device 610 may transmit a broadcast stream including content and CAS information to the broadcast receiving device 620.
  • the content included in the broadcast stream may be encrypted, and the CAS information may include CAS ECM.
  • the broadcast providing device 610 may generate an ECM having a predetermined format based on the CAS information, and store the generated ECM in association with the CAS information.
  • the format of the ECM means a format that can be decoded by the broadcast reception device 620.
  • the ECM may correspond to the aforementioned TV Key ECM.
  • the broadcast providing device 610 may transmit CAS information and the generated ECM to the server 630.
  • the server 630 may transmit the ECM to the broadcast reception device 620 according to the request of the broadcast reception device 620.
  • the request of the broadcast reception device 620 may include CAS information included in the broadcast stream, and the server 630 may transmit an ECM corresponding to the CAS information to the broadcast reception device 620.
  • the broadcast receiving device 620 may be an electronic device that receives predetermined content such as a TV and a set top box (STB).
  • the broadcast reception device 620 may output content included in a broadcast stream received from the broadcast providing device 610.
  • the broadcast receiving device 620 may decrypt the encrypted content and output the decrypted content.
  • the broadcast reception device 620 may decrypt the encrypted content based on the CAS information included in the broadcast stream.
  • the broadcast reception device 620 may need to embed predetermined software to decode the CAS ECM. In addition, such software must be updated every predetermined period.
  • the broadcast receiving device 620 transmits CAS information included in a broadcast stream to the server 630 through a network, and transmits the ECM generated by the broadcast providing device 610 to CAS information. Can be received from the server 630 based on this. That is, the broadcast reception device 620 may decode the received ECM without additional software by decoding the ECM generated in a predetermined format and decrypt the encrypted content based on the decoding result.
  • the ECM is transmitted to the broadcast receiving device 620 by the server 630, but the broadcast providing device 610 operates as the server 630 to directly transfer the ECM to the broadcast receiving device 620. Of course, it can transmit.
  • FIG. 7 is a flowchart illustrating a method of operating a broadcast reception device according to an embodiment of the present disclosure.
  • the broadcast reception device may receive a broadcast stream including encrypted content based on a conditional access system (CAS).
  • CAS conditional access system
  • the broadcast stream may be received from the broadcast providing device.
  • the encrypted content may be scrambled content.
  • the broadcast reception device may extract CAS information for decrypting the encrypted content from the received broadcast stream.
  • the CAS information may include information for decrypting the encrypted content.
  • the CAS information may include information for identifying at least one of the plurality of CASs and ECM information related to a right to receive content.
  • the identification information may include a 'root URL'.
  • the root URL may be anything as long as it indicates a location from which ECM can be received, such as “http://www.bbc.co.uk/”.
  • the ECM information may include information related to CAS ECM generated in a different format for each broadcaster or CAS vendor.
  • the ECM information includes information related to a user's broadcasting reception qualification, and the CAS ECM means an ECM generated in a different format for each broadcaster or CAS vendor.
  • the broadcast reception device may receive an Entitlement Control Message (ECM) having a preset format based on CAS information generated in different formats for each broadcaster. Accordingly, the broadcast reception device may receive an ECM having a format defined by a key of the broadcast reception device based on the CAS ECM included in the CAS information. At this time, the ECM having a predetermined format may be received from an external electronic device, for example, an external server. On the other hand, providing the ECM is not limited to the external electronic device, but may be provided by the broadcast providing device.
  • ECM Entitlement Control Message
  • the broadcast reception device may generate a hash based on the ECM information to receive the ECM from the external electronic device.
  • the broadcast reception device may generate a hash based on the ECM information by using a predetermined algorithm.
  • the broadcast reception device may generate a URL based on the generated hash and the identification information included in the CAS information.
  • the generated URL may be generated based on the text information of the hash and the 'root URL'.
  • the broadcast reception device may receive an ECM having a preset format from an external server based on the generated URL. For example, the broadcast reception device may retrieve an external electronic device for receiving the ECM based on the generated URL, and receive an ECM corresponding to the ECM information from the found external electronic device.
  • the broadcast reception device may display the decoded content based on the ECM.
  • the broadcast reception device may decrypt the encrypted content based on the received ECM to display the content.
  • the broadcast reception device may generate control information based on the received ECM.
  • the control information may include a control word (CW), and the broadcast reception device may descramble the content using the generated control word and output the descrambled content on the display.
  • FIG. 8 is a flowchart illustrating a method of operating a broadcast providing apparatus according to an embodiment of the present disclosure.
  • the broadcast providing device may encrypt content based on a conditional access system (CAS).
  • the broadcast providing device may scramble content.
  • the broadcast providing device may generate control information based on the CAS, and may encrypt content by using the generated control information.
  • the control information may include a control word that is randomly generated to scramble the content.
  • the broadcast providing device may generate CAS information for decoding content.
  • CAS information may include information related to CAS ECM.
  • the broadcast providing device may generate CAS information by modifying information for identifying the ECM.
  • the broadcast providing device may generate an ECM in a preset format based on the CAS information.
  • the broadcast providing device may generate an ECM in a standardized format defined by a key of the broadcast reception device so that the broadcast reception device can be decoded by the broadcast reception device. Accordingly, even if the broadcast receiving device cannot decode the CAS ECM included in the CAS information, the broadcast reception device may understand the ECM provided in a predetermined format without a separate external device or program.
  • the broadcast providing device may transmit a broadcast stream including content and CAS information to the broadcast receiving device.
  • the broadcast stream includes a plurality of multiplexed broadcast services, and may include content protected by CAS and different CASs may be used for different services in the broadcast stream.
  • the broadcast stream may include CAS information related to CAS ECM. Since CAS information is the same as the above-mentioned, it abbreviate
  • the broadcast providing device may transmit the ECM to the broadcast receiving device at the request of the broadcast receiving device.
  • the broadcast providing device may transmit an ECM corresponding to the CAS ECM to the broadcast reception device through an external electronic device.
  • the request of the broadcast reception device is not limited to the CAS ECM, and may be any data requesting the ECM.
  • FIG. 9 is a flowchart illustrating a method of operating a server according to an exemplary embodiment.
  • the broadcast reception device may receive an ECM having a preset format directly from the broadcast providing device or through an external electronic device, for example, a server.
  • the server may receive CAS information and an ECM from a broadcast providing device and transmit an ECM according to a request of the broadcast receiving device.
  • the server may receive CAS information related to CAS and an ECM having a predetermined format from the broadcast providing device.
  • the format of the ECM may be a standard format defined by a key of the broadcast reception device.
  • FIG. 10 is a flowchart illustrating a data transmission / reception method between devices according to an embodiment of the present disclosure.
  • the broadcast providing device 100 may encrypt the content on the basis of CAS (S1010).
  • the broadcast providing device 100 may generate an encryption key based on the CAS and scramble the content using the encryption key so that an unauthorized user cannot view the content.
  • the encryption key may be a randomly generated control word.
  • the broadcast providing device 100 may generate CAS information for decoding content and an ECM related to the CAS information (S1020).
  • the broadcast providing device 100 may generate CAS information including CAS ECM associated with a viewing authority of a user. Since the CAS ECM cannot be decoded by the broadcast receiving device 110 without a separate program or external device, the broadcast providing device 100 is defined by a key of the broadcast receiving device 110 based on CAS information. It is possible to create an ECM with a standardized format.
  • the broadcast providing device 100 may transmit a broadcast stream including the encrypted content and CAS information to the broadcast receiving device 110 in operation S1030.
  • the broadcast providing device 100 may transmit the CAS information and the ECM to the server 120 (S1040).
  • the steps are divided into S1030 and S1040, but S1030 and S1040 may be performed substantially simultaneously, and S1030 may be performed after S1040.
  • the broadcast reception device 110 may generate a URL based on the CAS information in operation S1050.
  • the broadcast receiving device 110 may generate a hash of the CAS ECM based on the CAS information.
  • the broadcast reception device 110 may generate a URL for acquiring the ECM based on a hash of the CAS ECM and a root URL indicating the domain of the external electronic device providing the ECM.
  • the broadcast receiving device 110 may retrieve the server 120 corresponding to the generated URL (S1060). In addition, the broadcast reception device 110 may request an ECM having a predetermined format from the server 120 (S1070). In detail, the broadcast reception device 110 may request the ECM from the server 120 based on a hash of the CAS ECM included in the URL and information of the server 120 providing the ECM.
  • the server 120 may transmit the ECM according to the request to the broadcast reception device 110 in operation S1080.
  • the ECM may be generated in a standardized format that can be decoded by a key of the broadcast reception device 110.
  • the broadcast receiving device 110 may display the decoded content on the basis of the ECM (S1090).
  • the broadcast reception device 110 may generate control information based on the ECM, and decode the content based on the generated control information.
  • the broadcast receiving device 110 may display the decoded content.
  • FIG. 11 is a block diagram illustrating an internal configuration of a broadcast reception device according to an embodiment of the present disclosure.
  • the broadcast reception device 1100 may correspond to the broadcast reception devices 110, 410, 510, and 610 described with reference to FIGS. 1, 4, 5, and 6. Therefore, the description of the broadcast reception device 1100 overlapping with the broadcast reception devices 110, 410, 510, and 610 of FIGS. 1, 4, 5, and 6 will be omitted.
  • the broadcast reception device 1100 broadcasts by executing the communication unit 1120, a memory 1130 for storing at least one or more instructions, a display 1140, and at least one or more instructions. It may include at least one processor 1110 for controlling the receiving device 1100. However, not all components illustrated in FIG. 11 are essential components of the broadcast reception device 1100.
  • the broadcast reception device 1100 may be implemented by more components than those illustrated in FIG. 11, or the broadcast reception device 1100 may be implemented by fewer components than those illustrated in FIG. 11.
  • the at least one processor 1110 receives a broadcast stream including the encrypted content based on a conditional access system (CAS) and encrypts the encrypted content from the received broadcast stream. Extract CAS information to decode the information, receive an Entitlement Control Message (ECM) having a predetermined format based on CAS information generated in different formats for each broadcaster, and display the decoded content based on the ECM. . That is, the processor 1110 may control the overall operation of the broadcast reception device 1100.
  • ECM Entitlement Control Message
  • the communication unit 1120 may transmit and receive data for decoding content with an external electronic device, for example, an external server, through a network.
  • the communication unit 1120 may receive a broadcast stream from at least one broadcast providing device connected to a network.
  • the broadcast reception device 1100 may receive a broadcast stream in a broadcast manner.
  • the broadcast reception device 1100 may transmit and receive predetermined information to an external server to decode content included in the received broadcast stream. That is, the processor 1110 may control to transmit / receive predetermined information for decoding content with an external electronic device through the communication unit 1120.
  • the communicator 1120 may include a short range communication module (not shown), a wired communication module (not shown), and a mobile communication module according to a short range communication technology to transmit and receive predetermined information to at least one external electronic device connected to a network. Not shown).
  • the short range communication module refers to a module for short range communication within a predetermined distance.
  • Local area communication technology includes a wireless LAN, Wi-Fi, Bluetooth, Zigbee, WFD (Wi-Fi Direct), UWB (ultra wideband), infrared communication ( IrDA (Infrared Data Association), Bluetooth Low Energy (BLE), Near Field Communication (NFC), and the like, but are not limited thereto.
  • the wired communication module (not shown) refers to a module for communication using an electrical signal or an optical signal, and the wired communication technology according to an embodiment includes a pair cable, a coaxial cable, an optical fiber cable, and an ethernet cable. Etc. may be included.
  • a mobile communication module (not shown) transmits and receives a wireless signal with at least one of a base station, an external terminal, and a server on a mobile communication network.
  • the wireless signal may include various types of data according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.
  • the memory 1130 may store at least one instruction.
  • the memory 330 may store a predetermined program and / or data or information.
  • the memory 1130 may store at least one of information for decoding content received from the broadcast providing device through the communication unit 1120.
  • the memory 1130 may include various types of storage media.
  • the memory 1130 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (SD, XD memory, etc.), Random Access Memory (RAM) Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM) magnetic memory, Magnetic disk It may include at least one type of storage medium of the optical disk.
  • RAM Random Access Memory
  • SRAM Static Random Access Memory
  • ROM Read-Only Memory
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • PROM Programmable Read-Only Memory
  • the memory 1130 may store CAS information, a hash of the CAS ECM, a root URL, a URL, and an ECM.
  • the memory 330 may update and store CAS information acquired by the processor 1110.
  • FIG. 12 is a block diagram specifically illustrating an internal configuration of a broadcast reception device according to an embodiment of the present disclosure.
  • the broadcast reception device 1200 may correspond to the broadcast reception device described with reference to FIGS. 1 to 11.
  • the communication unit 1250, the tuner unit 1240, the control unit 1280, the display 1215, and the memory 1290 of the broadcast reception device 1200 are respectively illustrated in FIG. 11 of the broadcast reception device 1100.
  • the communication unit 1120, the processor 1110, the display 1140, and the memory 1130 may correspond to each other.
  • the processor 1110 may be included in the controller 1280.
  • the broadcast receiving device 1200 may further include a configuration corresponding to a user interface (not shown) in addition to the configurations illustrated in FIG. 12.
  • the broadcast receiving apparatus 1200 may include a video processor 1210, a display 1215, an audio processor 1220, an audio output unit 1225, a power supply unit 1230, a tuner unit 1240, and a communication unit ( 1250, a detector 1260, an input / output unit 1270, a controller 1280, and a memory 1290.
  • the video processor 1210 performs processing on the video data received by the broadcast receiving device 1200.
  • the video processor 1210 may perform various image processing such as decoding, scaling, noise filtering, frame rate conversion, resolution conversion, and the like on the video data.
  • decoding of the content included in the received broadcast stream may be performed by the video processor 1210 under the control of the controller 1280.
  • the controller 1280 receives a recording request for the video data processed by the video processor 1210, encrypts or decrypts the video data, and includes a memory device (not shown) included in the controller 1280 or the memory 1290. For example, it may be controlled to be written to RAM (not shown).
  • the display 1215 displays the video included in the broadcast signal received through the tuner 1240 on the screen under the control of the controller 1280.
  • the display 1215 may display content (eg, a moving image) input through the communication unit 1250 or the input / output unit 1270.
  • the display 1215 may output an image stored in the memory 1290 under the control of the controller 1280.
  • the display 1215 may include a voice user interface (eg, including a voice command guide) for performing a voice recognition task corresponding to voice recognition or a motion for performing a motion recognition task corresponding to motion recognition.
  • UI eg, including a user motion guide for motion recognition
  • the audio processor 1220 performs processing on audio data.
  • the audio processor 1220 may perform various processing such as decoding, amplification, noise filtering, or the like on the audio data.
  • the audio processor 1220 may include a plurality of audio processing modules to process audio corresponding to a plurality of contents.
  • the audio output unit 1225 outputs audio included in the broadcast signal received through the tuner 1240 under the control of the controller 1280.
  • the audio output unit 1225 may output audio (eg, voice or sound) input through the communication unit 1250 or the input / output unit 1270.
  • the audio output unit 1225 may output audio stored in the memory 1290 under the control of the controller 1280.
  • the audio output unit 1225 may include at least one of a speaker 1226, a headphone output terminal 1227, or a Sony / Philips Digital Interface (S / PDIF) output terminal 1228.
  • the audio output unit 1225 Speaker 1226, a headphone output terminal 1227 and a S / PDIF output terminal 1228.
  • the power supply unit 1230 supplies power input from an external power source to the components 1210 to 1290 in the broadcast receiving device 1200 under the control of the controller 1280. Also, the power supply unit 1230 may supply power output from one or more batteries (not shown) located in the broadcast receiving device 1200 to the internal components 1210 to 1290 under the control of the controller 1280. Can supply
  • the tuner unit 1240 performs only a frequency of a channel to be received by the broadcast receiving apparatus 1200 among a number of radio wave components through amplification, mixing, and resonance of a broadcast signal received by wire or wirelessly. Can be selected by tuning.
  • the broadcast signal includes audio, video, and additional information (eg, an EPG).
  • the tuner 1240 may receive a broadcast signal in a predetermined frequency band according to an external input (for example, a received control signal, an external input such as HDMI, DVI, or DP).
  • the external input is a control signal received from an external control device (not shown), a remote controller (not shown), or the like, for example, a channel number input, an up-down input of a channel, and an EPG screen.
  • the tuner 1240 may receive a broadcast signal from various sources such as terrestrial broadcast, cable broadcast, satellite broadcast, and internet broadcast.
  • the tuner 1240 may receive a broadcast signal from a source such as analog broadcast or digital broadcast.
  • the broadcast signal received through the tuner unit 1240 is decoded (eg, audio decoded, video decoded or side information decoded) and separated into audio, video and / or side information.
  • the separated audio, video and / or additional information may be stored in the memory 1290 under the control of the controller 1280.
  • the tuner 1240 of the broadcast reception device 1200 may be one or plural. According to an embodiment, when the tuner 440 includes a plurality of tuners, a plurality of broadcast signals may be output to a plurality of windows forming a multi-window screen provided on the display 1215.
  • the tuner unit 1240 is implemented as an all-in-one with the broadcast receiving device 1200 or has a separate device (eg, a set-top box having a tuner unit electrically connected to the broadcast receiving device 1200). a set-top box (not shown) and a tuner unit (not shown) connected to the input / output unit 1270).
  • the communication unit 1250 may connect the broadcast receiving device 1200 to an external electronic device (for example, a broadcast providing device or a server) under the control of the controller 1280.
  • the controller 1280 may transmit / receive predetermined information or predetermined content to an external electronic device connected through the communication unit 1250, download an application from the external electronic device, or perform web browsing.
  • the controller 1280 may receive content from an external electronic device (not shown) by accessing a network through the communication unit 1250.
  • the communication unit 1250 may include at least one of a short range communication module (not shown), a wired communication module (not shown), and a mobile communication module (not shown).
  • the communication unit 1250 includes one of a wireless LAN 1251, a Bluetooth 1252, and a wired Ethernet 1253.
  • the communication unit 450 may include a combination of a wireless LAN 1251, a Bluetooth 1252, and a wired Ethernet 1253.
  • the communication unit 1250 may receive a control signal of a control device (not shown) under the control of the controller 1280.
  • the control signal may be implemented in a Bluetooth type, an RF signal type or a Wi-Fi type.
  • the communication unit 1250 may further include other short-range communication (eg, near field communication (NFC)) and a separate BLE module (bluetooth low energy, not shown) in addition to Bluetooth.
  • NFC near field communication
  • BLE bluetooth low energy
  • the tuner 1240 and the communicator 1250 may correspond to the communicator 1120 of FIG. 11, and the communicator 1250 may further include a tuner 1240. There will be.
  • the detector 1260 detects a user's voice, a user's image, or a user's interaction.
  • the microphone 1261 receives the uttered voice of the user.
  • the microphone 1261 may convert the received voice into an electric signal and output the converted signal to the controller 1280.
  • the user voice may include a voice corresponding to a menu or a function of the broadcast receiving device 1200.
  • the recognition range of the microphone 1261 is recommended to be within 4 m from the microphone 1261 to the user's position, and the recognition range of the microphone 1261 may include the size of the user's voice and the surrounding environment (eg, speaker sound, Ambient noise).
  • the microphone 1261 may be implemented as a single body or a separate body from the broadcast receiving device 1200.
  • the separated microphone 1261 may be electrically connected to the broadcast receiving device 1200 through the communication unit 1250 or the input / output unit 1270.
  • the microphone 1261 may be excluded depending on the performance and structure of the broadcast receiving device 1200.
  • the camera unit 1262 receives an image (eg, a continuous frame) corresponding to a motion of a user including a gesture in a camera recognition range.
  • the recognition range of the camera unit 1262 may be a distance of 0.1 to 5 m from the camera unit 1262 to the user.
  • the user motion may include, for example, a motion of a user's body part or part of the user, such as a user's face, facial expression, hand, fist, finger.
  • the camera unit 1262 may convert the received image into an electric signal and output the converted image to the controller 1280 under the control of the controller 1280.
  • the controller 1280 may select a menu displayed on the broadcast reception device 1200 or perform a control corresponding to the motion recognition result using the received motion recognition result. For example, it may include channel adjustment, volume adjustment, indicator movement.
  • the camera unit 1262 may include a lens (not shown) and an image sensor (not shown).
  • the camera unit 1262 may support optical zoom or digital zoom by using a plurality of lenses and image processing.
  • the recognition range of the camera unit 1262 may be set in various ways according to the angle of the camera and the environmental conditions.
  • the camera unit 1262 may receive a 3D still image or a 3D motion by using the plurality of cameras.
  • the camera unit 1262 may be implemented as an integrated type or a separate type from the broadcast receiving device 1200.
  • a separate device (not shown) including the separated camera unit 1262 may be electrically connected to the broadcast receiving device 1200 through the communication unit 1250 or the input / output unit 1270.
  • the camera unit 1262 may be excluded depending on the performance and structure of the broadcast receiving device 1200.
  • the light receiver 1263 receives an optical signal (including a control signal) received from an external control device (not shown) through a light window (not shown) of the bezel of the display 1215.
  • the light receiver 1263 may receive an optical signal corresponding to a user input (for example, a touch, a press, a touch gesture, a voice, or a motion) from a control device (not shown).
  • the control signal may be extracted by the control of the controller 1280 from the received optical signal.
  • the light receiver 1263 may receive a signal corresponding to a pointing position of a control device (not shown) and transmit the signal to the controller 1280.
  • a user interface screen for receiving data or a command from a user is output through the display 1215, and a user wants to input data or a command to the broadcast receiving device 1200 through a control device (not shown).
  • the light receiver 1262 responds to the movement of the control device (not shown).
  • a signal may be received and transmitted to the controller 1280.
  • the light receiving unit 1263 may receive a signal indicating that a specific button provided in the control device (not shown) is pressed and transmit it to the control unit 1280. For example, when the user presses a finger on a touch pad (not shown) provided as a button on a control device (not shown), the light receiving unit 1263 receives a signal indicating that the button touch pad (not shown) has been pressed and then presses it. Transmission to the controller 1280 may be performed. For example, a signal indicating that the button touch pad (not shown) is pressed may be used as a signal for selecting one of the items.
  • the input / output unit 1270 controls video (for example, a video), audio (for example, voice, music, etc.) and additional information (externally) from the outside of the broadcast receiving device 1200 under the control of the controller 1280.
  • EPG electronic program guide
  • the input / output unit 1270 is one of an HDMI port (High-Definition Multimedia Interface port, 1271), a component jack (component jack, 1272), a PC port (PC port, 1273), and a USB port (USB port, 1274). It may include.
  • the input / output unit 1270 may include a combination of an HDMI port 1271, a component jack 1272, a PC port 1273, and a USB port 1274.
  • the controller 1280 controls an overall operation of the broadcast receiving device 1200 and a signal flow between internal components (not shown) of the broadcast receiving device 1200 and performs data processing.
  • the controller 1280 may execute an operating system (OS) and various applications stored in the memory 1290 when a user input is input or when a preset and stored condition is satisfied.
  • OS operating system
  • the controller 1280 stores a signal or data input from the outside of the broadcast receiving device 1200 or uses a RAM (not shown) that is used as a storage area corresponding to various operations performed by the broadcast receiving device 1200, and broadcast receiving.
  • the control program for controlling the apparatus 1200 may include a ROM (not shown) and a processor (not shown) in which a control program is stored.
  • the processor may include a graphic processor (Graphic Processing Unit, not shown) for graphic processing corresponding to the video.
  • the processor may be implemented as a system on chip (SoC) integrating a core (not shown) and a GPU (not shown).
  • SoC system on chip
  • the processor may include a single core, dual core, triple core, quad core, and multiple cores thereof.
  • a processor may include a plurality of processors.
  • the processor may be implemented as a main processor (not shown) and a sub processor (not shown) that operates in a sleep mode.
  • the graphic processor (not shown) generates a screen including various objects such as an icon, an image, and a text using a calculator (not shown) and a renderer (not shown).
  • the calculator calculates attribute values such as coordinates, shapes, sizes, colors, and the like in which each object is to be displayed according to the layout of the screen using the user interaction sensed by the detector.
  • the renderer generates screens of various layouts including objects based on the attribute values calculated by the calculator. The screen generated by the renderer is displayed in the display area of the display 1215.
  • FIG. 13 is a block diagram illustrating an internal configuration of a broadcast providing apparatus according to an embodiment of the present disclosure.
  • the broadcast providing device 1300 may correspond to the broadcast providing devices 100, 400, and 620 described with reference to FIGS. 1 to 10. Therefore, the description of the broadcast providing apparatus 1300 overlapping with the broadcast providing apparatuses 100, 400, and 620 of FIGS. 1 to 10 will be omitted.
  • the broadcast providing device 1300 includes a communication unit 1320, a memory 1330 for storing at least one or more instructions, and at least one processor 1310 for controlling the broadcast providing device 1300 by executing at least one or more instructions. do.
  • the communication unit 1320 may correspond to the broadcast stream transmitters 102 and 402 and the communication unit 103 described above with reference to FIGS. 1 to 5.
  • the at least one processor 1310 generates a conditional access system (CAS) information for encrypting content and decrypting the content based on a conditional access system (CAS). And generate an Entitlement Control Message (ECM) in a predetermined format based on the CAS information, transmit a broadcast stream including content and CAS information to the broadcast receiving device, and transmit the ECM according to a request of the broadcast receiving device. It can transmit to the receiving device.
  • CAS conditional access system
  • ECM Entitlement Control Message
  • the processor 1310 may encrypt, for example, scramble, the content based on the CAS.
  • the processor 1310 may generate control information based on the CAS, and encrypt the content using the generated control information.
  • the processor 1310 may generate CAS information for decoding content, and generate an ECM in a predetermined format based on the generated CAS information.
  • the communication unit 1320 may transmit a broadcast stream including content and CAS information to the broadcast reception device under the control of the processor 1310.
  • the communication unit 1320 may transmit an ECM corresponding to a request of the broadcast reception device to the broadcast reception device under the control of the processor 1310.
  • the communication unit 1320 may transmit the ECM to the broadcast reception device through an external electronic device, for example, a server.
  • the memory 1330 may store at least one of information for encrypting and decrypting content.
  • the memory 1330 may store encrypted content, CAS information for decrypting the content, and the ECM.
  • the memory 1330 may update and store data acquired by the processor 1310.
  • FIG. 14 is a block diagram illustrating an internal configuration of a server according to an embodiment of the present disclosure.
  • the server 1400 may be included in the external electronic device described with reference to FIGS. 1 to 13.
  • the server 1400 refers to an external electronic device that provides an ECM to a broadcast reception device.
  • the server 1400 may correspond to the servers 420 and 630 described with reference to FIGS. 1 to 10. Therefore, description of the server 1400 overlapping with the servers 420 and 630 of FIGS. 1 to 10 will be omitted.
  • the server 1400 includes a communication unit 1420, a memory 1430 that stores at least one or more instructions, and at least one processor 1410 that controls the server 1400 by executing at least one or more instructions.
  • the processor 1410 may receive, from the broadcast providing device, the CAS information related to the CAS and an ECM having a predetermined format through the communication unit 1420. Meanwhile, the processor 1410 may receive CAS information from the broadcast providing device and generate an ECM having a preset format.
  • the communication unit 1420 may control to receive a request of the broadcast reception device under control of the processor 1410, and transmit the ECM to the broadcast reception device.
  • the memory 1430 may store data transmitted and received from the broadcast providing device and the broadcast receiving device.
  • the memory 1430 may store CAS information and ECM for decoding content.
  • the memory 1430 may update and store data acquired by the processor 1410.
  • Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media.
  • the computer readable medium may include a computer storage medium.
  • Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data.
  • the operating method of the display apparatus may be implemented in the form of program instructions that may be executed by various computer means and may be recorded in a computer readable medium.
  • the computer-readable media described above may include program instructions, data files, data structures, etc. alone or in combination.
  • the program instructions recorded on the above-mentioned medium may be those specially designed and constructed for the present invention, or may be known and available to those skilled in computer software.
  • the computer readable medium described above may be included in a computer program product.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
  • unit may be a hardware component such as a processor or a circuit, and / or a software component executed by a hardware component such as a processor.

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  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention concerne un appareil et un procédé de traitement d'un contenu fondé sur un système d'accès conditionnel. Plus précisément, un procédé d'exploitation d'un appareil de réception de diffusion consiste : à recevoir un flux de diffusion comprenant un contenu chiffré en fonction d'un système d'accès conditionnel (CAS); à extraire, à partir du flux de diffusion reçu, des informations CAS afin de déchiffrer le contenu chiffré; à recevoir un message de commande d'habilitation (ECM) présentant un format préconfiguré, en fonction des informations CAS générées dans différents formats en fonction de fournisseurs de services de diffusion; et à afficher le contenu déchiffré en fonction de l'ECM.
PCT/KR2019/007492 2018-06-22 2019-06-21 Appareil et procédé de traitement de contenu fondé sur un système d'accès conditionnel WO2019245318A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US17/254,675 US11368755B2 (en) 2018-06-22 2019-06-21 Apparatus and method for processing conditional access system-based content
CN201980041825.9A CN112335253B (zh) 2018-06-22 2019-06-21 用于处理基于条件访问系统的内容的装置及方法
EP19822727.4A EP3787297A4 (fr) 2018-06-22 2019-06-21 Appareil et procédé de traitement de contenu fondé sur un système d'accès conditionnel

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB1810287.1A GB2575032B (en) 2018-06-22 2018-06-22 Apparatus, systems and methods for accessing CAS protected content
GB1810287.1 2018-06-22
KR1020190069555A KR102674617B1 (ko) 2018-06-22 2019-06-12 수신 제한 시스템에 기반하는 컨텐트를 처리하기 위한 장치 및 방법
KR10-2019-0069555 2019-06-12

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WO2019245318A1 true WO2019245318A1 (fr) 2019-12-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100976573B1 (ko) * 2008-06-13 2010-08-18 주식회사 드리머아이 공개키 기반 수신제한시스템 및 이를 이용한 수신제한서비스 방법
KR101085575B1 (ko) * 2011-04-13 2011-11-25 주식회사 디지캡 Ｃａｓ 서비스를 제공하기 위한 ｃａｓ 서비스 시스템 및 그 운용방법
KR101315799B1 (ko) * 2007-03-13 2013-10-08 삼성전자주식회사 제한수신시스템 기반의 보안 시스템 및 그를 이용한제한수신서비스 처리방법
KR101768045B1 (ko) * 2011-01-26 2017-08-14 에스케이플래닛 주식회사 방송 수신 제한 서비스 시스템 및 방법
KR20180046674A (ko) * 2016-10-28 2018-05-09 삼성전자주식회사 전자 장치, 방송 서비스 제공 시스템 및 그 동작방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101315799B1 (ko) * 2007-03-13 2013-10-08 삼성전자주식회사 제한수신시스템 기반의 보안 시스템 및 그를 이용한제한수신서비스 처리방법
KR100976573B1 (ko) * 2008-06-13 2010-08-18 주식회사 드리머아이 공개키 기반 수신제한시스템 및 이를 이용한 수신제한서비스 방법
KR101768045B1 (ko) * 2011-01-26 2017-08-14 에스케이플래닛 주식회사 방송 수신 제한 서비스 시스템 및 방법
KR101085575B1 (ko) * 2011-04-13 2011-11-25 주식회사 디지캡 Ｃａｓ 서비스를 제공하기 위한 ｃａｓ 서비스 시스템 및 그 운용방법
KR20180046674A (ko) * 2016-10-28 2018-05-09 삼성전자주식회사 전자 장치, 방송 서비스 제공 시스템 및 그 동작방법

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3787297A4 *

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