WO2010041811A2 - Procede d'emission et de reception et dispositif de fourniture de services de diffusion a acces conditionnel - Google Patents

Procede d'emission et de reception et dispositif de fourniture de services de diffusion a acces conditionnel Download PDF

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Publication number
WO2010041811A2
WO2010041811A2 PCT/KR2009/003732 KR2009003732W WO2010041811A2 WO 2010041811 A2 WO2010041811 A2 WO 2010041811A2 KR 2009003732 W KR2009003732 W KR 2009003732W WO 2010041811 A2 WO2010041811 A2 WO 2010041811A2
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Prior art keywords
stream
base layer
enchancement
generating
conditional access
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PCT/KR2009/003732
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English (en)
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WO2010041811A3 (fr
Inventor
Byungjun Bae
Joungil Yun
Jong Soo Lim
Soo In Lee
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Electronics And Telecommunications Research Institute
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Priority to EP09819318.8A priority Critical patent/EP2345242A4/fr
Publication of WO2010041811A2 publication Critical patent/WO2010041811A2/fr
Publication of WO2010041811A3 publication Critical patent/WO2010041811A3/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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/02—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information
    • H04H60/07—Arrangements for generating broadcast information; Arrangements for generating broadcast-related information with a direct linking to broadcast information or to broadcast space-time; Arrangements for simultaneous generation of broadcast information and broadcast-related information characterised by processes or methods for the generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H04L65/762—Media network packet handling at the source 
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234327—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into layers, e.g. base layer and one or more enhancement layers
    • 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • H04N21/23895—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption
    • H04N21/23897—Multiplex stream processing, e.g. multiplex stream encrypting involving multiplex stream encryption by partially encrypting, e.g. encrypting only the ending portion of a movie
    • H—ELECTRICITY
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    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • 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
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
    • 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
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • 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
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64315—DVB-H
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64784—Data processing by the network
    • H04N21/64792—Controlling the complexity of the content stream, e.g. by dropping packets

Definitions

  • the present invention relates to a transmitting/receiving method and device for providing a conditional access broadcasting service. Particularly, the present invention relates to a transmitting/receiving method and device for providing a layered conditional access broadcasting service through advanced terrestrial digital multimedia broadcasting (T-DMB).
  • T-DMB advanced terrestrial digital multimedia broadcasting
  • the terrestrial digital multimedia broadcasting represents a broadcasting system that is generated by adding a multimedia broadcasting service including a video service to the European Eureka 147-based digital audio broadcasting (DAB) system.
  • the advanced terrestrial digital multimedia broadcasting represents a broadcasting system having extended the capability of transmission data to be double the maximum by adding a new layered modulation method to the T-DMB.
  • the AT-DMB uses the same frequency bandwidth as the existing T-DMB and increases the transmission capability to be double the maximum to provide further services and also supply the standard definition (SD) video service that is four times the T-DMB image quality.
  • SD standard definition
  • conditional access system In order to activate the T-DMB market, discussion about charging for the T-DMB data broadcasting service has recently increased. To provide such a charged service, the conditional access system (CAS) is applied to the corresponding contents. In the case of the AT-DMB allowing provision of many further broadcasting services compared to the T-DMB, it is needed to consider applying the charged service to the conditional access system.
  • CAS conditional access system
  • the AT-DMB system that is a little different from the T-DMB system requires a method for applying a conditional access system for providing charged services.
  • the present invention has been made in an effort to provide a transmitting/receiving method and device for providing a conditional access broadcasting service for a charged service that is compatible with the existing T-DMB by using the AT-DMB network.
  • An exemplary embodiment of the present invention provides a transmitting method for providing a conditional access broadcasting service including: generating a control word for scrambling by encoding a conditional access subscriber's data; changing the encoded data into an entitlement control message and an entitlement management message including data having classified a conditional access subscriber and a non-subscriber acquired by activating the encoded data; generating a final stream by multiplexing a base layer stream for a first broadcasting service, the entitlement control message, and the entitlement management message; generating a base layer frame and an enchancement layer frame based on the final stream and an enchancement layer stream for a second broadcasting service; and generating a broadcasting signal by hierarchically modulating the base layer frame and the enchancement layer frame and transmitting the same.
  • Another embodiment of the present invention provides a transmitting device for providing a conditional access broadcasting service including: an encoder for generating a control word for scrambling by encoding a conditional access subscriber's data, and changing the encoded data into an entitlement control message and an entitlement management message; a first multiplexer for generating a final stream by multiplexing the entitlement control message, the entitlement management message, and a base layer stream; a second multiplexer for multiplexing the final stream and the enchancement layer stream; and a modulator for hierarchically modulating a result of the second multiplexer.
  • Yet another embodiment of the present invention provides a receiving method for providing a conditional access broadcasting service including: generating a base layer ensemble corresponding to a first broadcasting service and an enchancement layer ensemble corresponding to a second broadcasting service by hierarchically demodulating a received broadcasting signal; generating a final stream and a scrambled enchancement layer stream by demultiplexing the base layer ensemble and the enchancement layer ensemble; generating an entitlement control message, an entitlement management message, and a scrambled base layer stream by demultiplexing the final stream; generating a control word for descrambling by decoding the entitlement control message and the entitlement management message; descrambling the scrambled base layer stream and the scrambled enchancement layer stream by using the control word; and decoding the descrambled base layer stream and enchancement layer stream and displaying the decoded results.
  • a receiving device for providing a conditional access broadcasting service includes: a demodulator for generating a base layer ensemble corresponding to a first broadcasting service and an enchancement layer ensemble corresponding to a second broadcasting service by hierarchically demodulating a broadcasting signal; a demultiplexer for generating a final stream and a scrambled enchancement layer stream by demultiplexing the base layer ensemble and enchancement layer ensemble, and generating an entitlement control message, an entitlement management message, and a scrambled base layer stream by demultiplexing the final stream; a first decoder for generating a control word for descrambling by decoding the entitlement control message and the entitlement management message; a first descrambler for descrambling the base layer stream by using the control word; a second descrambler for descrambling the scrambled enchancement layer stream by using the control word; and a second decoder for decoding the descramble
  • the charged service can be provided by using the AT-DMB network. Also, as the charged service is provided, associated business such as a business for providing data information including video, news, and location can be revived, and better quality services can be provided to viewers.
  • associated business such as a business for providing data information including video, news, and location can be revived, and better quality services can be provided to viewers.
  • FIG. 1 shows a block diagram for an AT-DMB transmitting system according to an exemplary embodiment of the present invention.
  • FIG. 2 shows a block diagram of a transmitting device for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • FIG. 3 shows a flowchart of a transmitting method for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • FIG. 4 shows a block diagram of a receiving device for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • FIG. 5 shows a flowchart of a receiving method for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • FIG. 1 shows a block diagram of a general advanced terrestrial digital multimedia broadcasting (AT-DMB) transmitting system.
  • AT-DMB advanced terrestrial digital multimedia broadcasting
  • the AT-DMB transmitting system includes an AT-DMB ensemble multiplexer 10 and an AT-DMB modulator 20.
  • the AT-DMB ensemble multiplexer 10 receives contents including a plurality of ensemble transport interface (ETI) frames or various interfaces from a plurality of encoders and multiplexers (not shown), and multiplexes the received contents to generate two ETI frames.
  • the two ETI frames includes a base layer ETI frame that is the existing T-DMB ETI frame and an enchancement layer ETI frame that is a hierarchical modulating ETI frame for increasing transmission capability.
  • An enchancement layer according to an exemplary embodiment of the present invention can be an improved area, but is not limited thereto.
  • the existing T-DMB service is referred to as a base layer service or a first broadcasting service
  • the hierarchically modulated service is called an enchancement layer service, an improved area service, or a second broadcasting service.
  • the AT-DMB modulator 20 generates a broadcasting signal by hierarchically modulating the received base layer ETI frame and the enchancement layer ETI frame. That is, the AT-DMB modulator 20 generates a broadcasting signal by hierarchically modulating the existing T-DMB ETI frame and the ETI frame.
  • the AT-DMB system is compatible with the existing T-DMB broadcasting. Therefore, the AT-DMB system that is a little different from the existing T-DMB system can provide a charged service by applying the conditional access system (CAS).
  • CAS conditional access system
  • the conditional access system changes the original broadcasting signal and transmits it so that the user may normally view the broadcasting program through a receiver having a receiving right for the corresponding broadcasting program. Therefore, it is possible to provide a charged broadcasting service in which a receiver with the receiving right on a specific broadcasting program views the same by using the conditional access system, and in this instance, the receiver with the receiving right can view the corresponding broadcasting program.
  • the format of the original broadcasting signal corresponding to the broadcasting program is changed and transmitted so that an unregistered receiver with no receiving right may not view the corresponding broadcasting program, which is called encryption or scrambling.
  • a key used for the scrambling process is called a control word (CW).
  • the exemplary embodiment of the present invention has realized a transmitting/receiving method and device for providing a conditional access broadcasting service for efficiently applying the conditional access system in the AT-DMB system.
  • FIG. 2 shows a block diagram of a transmitting device for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • the transmitting device for providing a conditional access broadcasting service receives a conditional access message from an external data management server (not shown) including conditional access subscriber data.
  • the transmitting device includes an encoder 110, a first scrambler 120, a second scrambler 130, a moving picture expert group (MPEG)-2 multiplexer 140, and ensemble multiplexer 150, and a modulator 160.
  • MPEG moving picture expert group
  • the encoder 110 generates an encryption key that is a control word used for scrambling by encoding input conditional access subscriber's data. Also, the encoder 110 changes the encoded conditional access subscriber's data into an entitlement control message (ECM) and an entitlement management message (EMM), and transmits them to the MPEG-2 multiplexer 140.
  • ECM entitlement control message
  • EMM entitlement management message
  • the ECM includes scrambled contents, for example scrambled video stream and a control word for scrambling
  • the EMM activates the subscriber's data to make the data having classified the conditional access subscriber and the conditional access non-subscriber into a message.
  • the first scrambler 120 encrypts (i.e., scrambles) the base layer stream input by using the control word received from the encoder 110.
  • the base layer stream is input through the base layer.
  • the base layer stream corresponds to the contents input through the base layer for the T-DMB.
  • the base layer stream may not be scrambled according to the user's selection.
  • the first scrambler 120 transmits the scrambled base layer stream to the MPEG-2 multiplexer 140.
  • the second scrambler 130 scrambles the enchancement layer stream input by using the control word generated by the encoder 110, that is, the same control word input to the base layer, and transmits the scrambled enchancement layer stream to the ensemble multiplexer 150.
  • the enchancement layer stream corresponds to the contents input through the enchancement layer for the AT-DMB.
  • the MPEG-2 multiplexer 140 multiplexes the received ECM, EMM, and scrambled base layer stream to generate a final stream.
  • the transport format includes the format of the ETI frame or MPEG-2 transport stream (TS).
  • the ensemble multiplexer 150 generates a base layer ETI frame and an enchancement layer ETI frame by multiplexing the ETI or TS format final stream generated by the MPEG-2 multiplexer 140, the scrambled enchancement layer stream, contents for other various services, and a fast information channel (FIC) for showing service configuration information.
  • the ensemble multiplexer 150 generates a base layer ETI frame by multiplexing the final stream, contents, and FIC, and generates an enchancement layer ETI frame by multiplexing the scrambled enchancement layer stream, contents, and FIC.
  • the modulator 160 generates an AT-DMB broadcasting signal by hierarchically modulating the base layer ETI frame and the enchancement layer ETI frame received from the ensemble multiplexer 150.
  • the generated AT-DMB broadcasting signal is provided to the subscribers, and the conditional access subscribers having subscribed to the charged service from among the subscribers can watch the broadcasting program through the AT-DMB broadcasting signal because of the ECM and EMM included in the AT-DMB broadcasting signal.
  • the conditional access subscriber represents a subscriber who subscribes to a charged service for paying a predetermined amount of money in order to receive a specific broadcasting program.
  • FIG. 3 shows a flowchart of a transmitting method for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • the transmitting device generates a control word by encoding the data of the conditional access subscriber received from the outside (S110). Also, the transmitting device changes the encoded data of the conditional access subscriber into the ECM and EMM.
  • the transmitting device scrambles the base layer stream by using the generated control word (S120).
  • the transmitting device generates a final stream in the format of the ETI frame or the MPEG-2 transport stream by multiplexing the scrambled base layer stream, the ECM, and the EMM (S130).
  • the transmitting device scrambles the enchancement layer stream by using the generated control word (S140).
  • the transmitting device generates a base layer ETI frame and an enchancement layer ETI frame by selectively multiplexing the generated final stream, the scrambled enchancement layer stream, other service contents, and the FIC (S150).
  • the transmitting device generates an AT-DMB broadcasting signal and transmits it by hierarchically modulating the generated base layer ETI frame and the enchancement layer ETI frame. Accordingly, the conditional access subscriber having requested the charged service through the AT-DMB broadcasting signal receives the AT-DMB service (S160).
  • the conditional access subscriber receives the AT-DMB service by using the EMM that is generated into a message by classifying the conditional access subscriber and other subscribers included in the AT-DMB broadcasting signal.
  • a receiving device for providing a conditional access broadcasting service will now be described with reference to FIG. 4.
  • FIG. 4 shows a block diagram of a receiving device for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • the receiving device includes a demodulator 210, an ensemble demultiplexer 220, a fast information channel (FIC) analyzer 230, a first descrambler 240, a first decoder 250, a second descrambler 260, a second decoder 270, and a display 280.
  • FIC fast information channel
  • the demodulator 210 generates a base layer ensemble and an enchancement layer ensemble by hierarchically demodulating the AT-DMB broadcasting signal received from the transmitting device.
  • the ensemble demultiplexer 220 generates a final stream, a scrambled enchancement layer stream, various other services, contents, and FIC by demultiplexing the received base layer ensemble and the enchancement layer ensemble. Also, the ensemble demultiplexer 220 generates an ECM, an EMM, and a scrambled base layer stream by demultiplexing the generated final stream.
  • the FIC analyzer 230 detects a scrambled stream from the final stream by analyzing the FIC by demultiplexing the base layer ensemble.
  • the first descrambler 240 descrambles the scrambled base layer stream received from the ensemble demultiplexer 220 by using the control word for descrambling received from the first decoder 250.
  • the first decoder 250 changes the generated ECM and EMM into the conditional access subscriber's data.
  • the first decoder 250 generates a control word for descrambling by decoding the acquired conditional access subscriber's data.
  • the second descrambler 260 descrambles the scrambled enchancement layer stream provided by the ensemble demultiplexer 220 by using the control word for descrambling provided by the first decoder 250.
  • the second decoder 270 generates a corresponding video image by decoding the scrambled stream from the stream, the descrambled base layer stream, and the enchancement layer stream.
  • the generated video image includes the standard definition (SD)-level image.
  • SD standard definition
  • the video image is provided to the conditional access subscriber through the EMM that is generated as a message by classifying the conditional access subscriber and the subscriber other than the conditional access subscriber.
  • the display 280 displays the generated video image.
  • the second decoder 270 can use a scalable video coding (SVC) decoder, but is not limited thereto.
  • SVC scalable video coding
  • a receiving method for providing a conditional access broadcasting service will now be described with reference to FIG. 5.
  • FIG. 5 shows a flowchart of a receiving method for providing a conditional access broadcasting service according to an exemplary embodiment of the present invention.
  • the receiving device generates a base layer ensemble and an enchancement layer ensemble by hierarchically demodulating the AT-DMB broadcasting signal received from the transmitting device S210.
  • the receiving device generates a final stream, a scrambled enchancement layer stream, contents for various other services, and FIC by demultiplexing the generated base layer ensemble and the enchancement layer ensemble (S220). Also, the receiving device generates an ECM, an EMM, and a scrambled base layer stream by demultiplexing the final stream.
  • the receiving device extracts a scrambled stream from the final stream by analyzing the FIC generated by demultiplexing the base layer ensemble (S230).
  • the receiving device changes the ECM and the EMM into the conditional access subscriber's data.
  • the receiving device decodes the conditional access subscriber's data to generate a control word for descrambling (S240).
  • the receiving device descrambles the base layer stream by using the generated control word for descrambling (S250). Also, the receiving device descrambles the scrambled enchancement layer stream by using the generated control word for descrambling (S260).
  • the receiving device displays the AT-DMB video image generated by decoding the scrambled stream, the descrambled base layer stream, and the enchancement layer stream (S270).
  • the receiving method for providing the conditional access broadcasting service can provide the conditional access broadcasting service for providing the charged service that is compatible with the T-DMB in the AT-DMB network to the conditional access subscriber.
  • the above-described embodiments can be realized through a program for realizing functions corresponding to the configuration of the embodiments or a recording medium for recording the program in addition to through the above-described device and/or method, which is easily realized by a person skilled in the art.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'émission/de réception permettant de fournir un service de diffusion à accès conditionnel qui consiste notamment à générer un mot de commande pour brouiller par codage l'accès conditionnel d'un abonné, et modification des données codées en message de commande d'admissibilité et message de gestion d'admissibilité comportant des données par classification de l'abonné à accès conditionnel et non abonné par activation des données. De plus, le procédé comporte la création d'un flux final par multiplexage du message de commande d'admissibilité, et un flux de couche de base pour un premier service de diffusion, la création d'une trame de couche de base et une trame de couche d'amélioration sur la base du flux final et un flux de couche d'amélioration pour un second service de diffusion, la création d'un signal de diffusion par modulation hiérarchique de la trame de couche de base et de la trame de couche d'amélioration, et l'émission du signal de diffusion.
PCT/KR2009/003732 2008-10-07 2009-07-08 Procede d'emission et de reception et dispositif de fourniture de services de diffusion a acces conditionnel WO2010041811A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09819318.8A EP2345242A4 (fr) 2008-10-07 2009-07-08 Procede d'emission et de réception et dispositif de fourniture de services de diffusion à acces conditionnel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020080098343A KR100972029B1 (ko) 2008-10-07 2008-10-07 제한 수신 방송서비스를 제공하는 송수신 방법 및 그 송수신 장치
KR10-2008-0098343 2008-10-07

Publications (2)

Publication Number Publication Date
WO2010041811A2 true WO2010041811A2 (fr) 2010-04-15
WO2010041811A3 WO2010041811A3 (fr) 2011-10-20

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PCT/KR2009/003732 WO2010041811A2 (fr) 2008-10-07 2009-07-08 Procede d'emission et de reception et dispositif de fourniture de services de diffusion a acces conditionnel

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EP (1) EP2345242A4 (fr)
KR (1) KR100972029B1 (fr)
WO (1) WO2010041811A2 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007037618A1 (fr) * 2005-09-27 2007-04-05 Electronics And Telecommunications Research Institute Appareil pour transmettre et pour recevoir une diffusion multimedia numerique pour un service video de haute qualite
KR100776677B1 (ko) * 2005-11-30 2007-11-19 한국전자통신연구원 지상파 ｄｍｂ 서비스용 제한수신 장치 및 그 방법
KR100841724B1 (ko) * 2006-02-10 2008-06-27 주식회사 문화방송 방송 송신 시스템 및 방송 수신 장치
WO2008069600A1 (fr) * 2006-12-06 2008-06-12 Electronics And Telecommunications Research Institute Appareil et procédé pour service de diffusion multimédia numérique
KR100848326B1 (ko) * 2006-12-19 2008-07-24 한국전자통신연구원 지상파 ｄｍｂ 제한수신 시스템에서의 송수신장치 및 방법
KR100838047B1 (ko) * 2006-12-26 2008-06-12 에스케이 텔레콤주식회사 Ｐｐｖ 구매 메커니즘 구현 방법 및 시스템
KR100882508B1 (ko) * 2007-11-27 2009-02-06 한국전자통신연구원 계층적 변조 방식을 이용하는 진화된 ｄｍｂ 제한 수신장치 및 그 방법
KR101192431B1 (ko) * 2008-12-11 2012-10-17 한국전자통신연구원 제한 수신 방송 서비스를 제공하는 ａｔ―ｄｍｂ 송신 및 수신 시스템 및 그 방법
EP2200307B1 (fr) * 2008-12-11 2015-09-16 Electronics and Telecommunications Research Institute Système de réception et de transmission AT-DMB pour fournir un service de diffusion à accès conditionnel et procédé associé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of EP2345242A4 *

Also Published As

Publication number Publication date
EP2345242A4 (fr) 2015-08-05
EP2345242A2 (fr) 2011-07-20
KR100972029B1 (ko) 2010-07-22
KR20100039117A (ko) 2010-04-15
WO2010041811A3 (fr) 2011-10-20

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