Classifications

• • 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
  • H04N21/633—Control signals issued by server directed to the network components or client
  • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
  • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N9/00—Details of colour television systems
  • H04N9/79—Processing of colour television signals in connection with recording
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
  • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
  • H04N21/4408—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/76—Television signal recording
  • H04N5/91—Television signal processing therefor
  • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N5/00—Details of television systems
  • H04N5/76—Television signal recording
  • H04N5/91—Television signal processing therefor
  • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
  • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
  • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled

Definitions

• the invention relates to a method and a device for retransmitting, as well as for editing and / or reproducing and / or storing audio and / or video content, and to a device for editing and / or reproducing and / or storing audio and / or audio image content.
• CPCM Content Protection and Copy Management
• CA Conditinal Access
• a CPCM system based solely on encryption is in principle unacceptable for public service broadcasters and for free-to-air broadcasters.
• the broadcast contents of these broadcasting providers will remain unencrypted in the future and can be recorded without restrictions.
• the transfer to interfaces between different playback devices in the home of the consumer should be unencrypted.
• wireless systems such as wireless LAN encryption of the transmitted content in the home, the consumer makes sense to prevent eavesdropping by neighbors - With the help of such wireless home systems in particular PC's with Internet access and set-top boxes for Rundrunkempfang Networked with other devices in the home of the consumer without cabling.
• the object of the invention is to provide possibilities which within a single system for transmitting and receiving encrypted or unencrypted audio and / or image content the requirement of the öffenth 'ch-rechth' chen broadcasting and of "free-to-air" - Progammaribietern after unencrypted processing and / or reproduction and / or storage of freely accessible content at the end user satisfied.
• This object is achieved in a method and a device of the type mentioned above in that a contained in the received signal, special usage authorization information, which signals that the end user after receiving the audio and / or image content should be available unencrypted, even at a optionally cascaded, encrypted retransmission of the sound and / or image content is added, and that in the processing and / or playback and / or storage of the encoded form further transmitted image and / or Toni ⁇ halte the special use authorization information triggers a decryption of the image and / or sound content at least at the end of retransmission cascade.
• a device for use in the method according to the invention and the device according to the invention is specified in the independent claim 3.
• the invention is based on the consideration, such image and / or sound content, which should be available to the end user unencrypted at leisure, to provide a special usage authorization information, which even with multiple encryption and decryption on their distribution to the image and / or sound content "sticks", or is logically linked to it, even if it is transmitted / stored independently of the sound and / or image content, and in various places where this is possible and useful, or at least at the end of the distribution path End-user triggers a decryption of the image and / or sound content, if encryption is present.
• Fig. 1 is a block diagram of a consumer electronic device according to the invention.
• Fig. 2 is a block diagram of one in the home of an end user existing island network for receiving encrypted or unencrypted video and / or audio signals and for their dissemination to a consumer electronic device according to Fig. 1, and
• FIG. 3 is a block diagram of a cascade of receivers and memories for forwarding image and / or audio content received from arbitrary transmission networks.
• the consumer electronic device 400 shown in FIG. 1 receives image and / or audio content 1 in encrypted or unencrypted form from a transmission network, not shown, as well as usage authorization information 2.
• the usage authorization information 2 remains the image and / or audio content 1 always added, or logically linked by appropriate means, even if it is physically transmitted separately from the picture and / or sound contents 1, regardless of whether the contents 1 are encrypted or decrypted on their transmission path to an end user's playback or storage device ,
• the usage authorization information 2 triggers, at least at the end of each transmission or retransmission, a decryption of the audio and / or audio content in the case of their encryption.
• an encrypted input signal of the device 400 is supplied to a decoder 401 provided there and decrypted there.
• An unencrypted input signal is looped through unchanged by the decision 401.
• the unencrypted audio and audio content at the output of the decryptor 401 is processed in a subsequent stage 402 and optionally in a memory 404 filed.
• the processed image and / or sound content is supplied to a shutter 403, which is connected via a control input to an evaluator 405.
• the evaluator 405 evaluates the entirety of the transmitted usage authorization information 2 and filters out a possibly contained instruction 3, not to be closed. This instruction 3 is forwarded to the closure 403 and prevents encryption there.
• the encryption key 403 thus encrypts the processed image and / or audio content only if the instruction 3 does not exist in the usage authorization information 2.
• the output of the encryptor 403 forms the output of the device 400 to which the usage authorization information 2 is again added.
• a wireless network 10 is shown in the home of an end user having a wireless LAN transmitter 200 and a wireless LAN receiver 300.
• the W-LAN transmitter 200 is coupled via an interface to an input stage 100 which receives image and / or audio content 1 in encrypted or unencrypted form together with a user authorization information 2 from any transmission network, for example the Internet or a broadcast network ,
• the front end 100 includes a primary receiver and, optionally, a decoder 100.
• the W-LAN transmitter 200 forwards the image and / or sound contents 1 wirelessly in encrypted form to the W-LAN receiver 300.
• the W-LAN receiver 300 is connected via a further interface with a consumer Eletronic device 400, which may be formed according to FIG. It is essential that the usage authorization information 2 by the Subsidiary network 10 is looped through or remains logically linked by appropriate measures, even if it is physically transmitted separately from the image and / or sound content 1, so that the usage authorization information 2 to the consumer electronic device 400 together with the further transmitted image and / or audio content is forwarded.
• Fig. 3 the principle of the coupling of the image and / or Toni ⁇ haltes 1 is illustrated with the usage authorization information 2 on the basis of a cascade of consumer electronic devices 400, 500 and 600 with decryption and Verschskeiern.
• the audio and / or audio content 1 is present together with the usage authorization information 2, regardless of whether within the respective device 100, 400 or 500 a decryption and / or Encryption is done or not.
• the last device 600 in the illustrated cascade of devices thus receives the image and / or sound content 1 together with the usage authorization information 2, which triggers a decryption of the image and / or sound content 1 in the device 600, if the content 1 in the meantime was encrypted somewhere.

Landscapes

• Engineering & Computer Science (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Computer Networks & Wireless Communication (AREA)
• Computer Security & Cryptography (AREA)
• Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
• Storage Device Security (AREA)
• Television Signal Processing For Recording (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36609115

Family Applications (2)

Family Applications After (1)

Country Status (8)

Families Citing this family (2)

Family Cites Families (31)

• 2005
  • 2005-07-15 DE DE102005033285.4A patent/DE102005033285C5/de active Active
• 2006
  • 2006-03-30 WO PCT/EP2006/002884 patent/WO2007009506A1/de not_active Application Discontinuation
  • 2006-03-30 EP EP06723851A patent/EP1905235A1/de not_active Ceased
  • 2006-03-30 JP JP2008520725A patent/JP2009501461A/ja active Pending
  • 2006-03-30 US US11/630,201 patent/US20080285946A1/en not_active Abandoned
  • 2006-03-30 CN CN2006800002852A patent/CN101019425B/zh active Active
  • 2006-03-30 EP EP11008533A patent/EP2487899A3/de not_active Ceased
  • 2006-03-30 KR KR1020067022301A patent/KR100874076B1/ko active IP Right Grant
  • 2006-12-08 TW TW095145888A patent/TWI349484B/zh active
• 2012
  • 2012-02-29 JP JP2012042655A patent/JP5557348B2/ja active Active
  • 2012-02-29 JP JP2012042654A patent/JP2012110052A/ja active Pending
  • 2012-12-26 US US13/727,221 patent/US9077953B2/en active Active

Non-Patent Citations (1)

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