WO2001078387A3 - Data scrambling and descrambling system - Google Patents

Data scrambling and descrambling system Download PDF

Info

Publication number
WO2001078387A3
WO2001078387A3 PCT/EP2001/003186 EP0103186W WO0178387A3 WO 2001078387 A3 WO2001078387 A3 WO 2001078387A3 EP 0103186 W EP0103186 W EP 0103186W WO 0178387 A3 WO0178387 A3 WO 0178387A3
Authority
WO
WIPO (PCT)
Prior art keywords
control word
control
scrambled
providing
content
Prior art date
Application number
PCT/EP2001/003186
Other languages
French (fr)
Other versions
WO2001078387A2 (en
Inventor
Andrew Augustine Wajs
Original Assignee
Irdeto Access Bv
Andrew Augustine Wajs
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.)
Filing date
Publication date
Application filed by Irdeto Access Bv, Andrew Augustine Wajs filed Critical Irdeto Access Bv
Priority to CA2405266A priority Critical patent/CA2405266C/en
Priority to US10/257,219 priority patent/US7116892B2/en
Priority to BR0109835-7A priority patent/BR0109835A/en
Priority to JP2001575712A priority patent/JP4772252B2/en
Priority to AU2001260138A priority patent/AU2001260138B2/en
Priority to MXPA02009818A priority patent/MXPA02009818A/en
Publication of WO2001078387A2 publication Critical patent/WO2001078387A2/en
Publication of WO2001078387A3 publication Critical patent/WO2001078387A3/en

Links

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]
    • H04N21/20—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
    • H04N21/26613—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 keys in general
    • 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
    • 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
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video stream decryption
    • 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
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • 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
    • 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

Abstract

A system for providing scrambled content, comprising a control word generator, each control word including a control word identifier, a scrambler for providing a stream of scrambled data packets, and an encryption device for providing entitlement control messages (ECM's). One or more consecutive packets are scrambled using the same control word (CW). Each packet includes a control word identifier. An ECM decryption device delivers control words to the descrambler and the descrambler descrambles the data packets of the scrambled content using a control word having a control word identifier corresponding with the control word identifier of the data packet to be descrambled. The system further comprises a storage device for storing scrambled content and means to control play back of the stored content, going fast forward and going backwards.
PCT/EP2001/003186 2000-04-07 2001-03-21 Data scrambling and descrambling system WO2001078387A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2405266A CA2405266C (en) 2000-04-07 2001-03-21 System for providing scrambled content, and system for descrambling scrambled content
US10/257,219 US7116892B2 (en) 2000-04-07 2001-03-21 System for providing scrambled content, and system for descrambling scrambled content
BR0109835-7A BR0109835A (en) 2000-04-07 2001-03-21 System for provisioning scrambled content and system for scrambling scrambled content
JP2001575712A JP4772252B2 (en) 2000-04-07 2001-03-21 System for providing scrambled content and system for descrambling scrambled content
AU2001260138A AU2001260138B2 (en) 2000-04-07 2001-03-21 Data scrambling and descrambling system
MXPA02009818A MXPA02009818A (en) 2000-04-07 2001-03-21 System for providing scrambled content, and system for descrambling scrambled content.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00201277A EP1143722B1 (en) 2000-04-07 2000-04-07 Data scrambling and descrambling system
EP00201277.1 2000-04-07

Publications (2)

Publication Number Publication Date
WO2001078387A2 WO2001078387A2 (en) 2001-10-18
WO2001078387A3 true WO2001078387A3 (en) 2002-10-24

Family

ID=8171322

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/003186 WO2001078387A2 (en) 2000-04-07 2001-03-21 Data scrambling and descrambling system

Country Status (14)

Country Link
US (1) US7116892B2 (en)
EP (1) EP1143722B1 (en)
JP (1) JP4772252B2 (en)
CN (1) CN1190077C (en)
AU (1) AU2001260138B2 (en)
BR (1) BR0109835A (en)
CA (1) CA2405266C (en)
DE (1) DE60040724D1 (en)
ES (1) ES2315219T3 (en)
HK (1) HK1041143B (en)
MX (1) MXPA02009818A (en)
TW (1) TW540240B (en)
WO (1) WO2001078387A2 (en)
ZA (1) ZA200209032B (en)

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Also Published As

Publication number Publication date
DE60040724D1 (en) 2008-12-18
US7116892B2 (en) 2006-10-03
EP1143722B1 (en) 2008-11-05
ZA200209032B (en) 2003-08-28
CA2405266A1 (en) 2001-10-18
ES2315219T3 (en) 2009-04-01
CA2405266C (en) 2010-05-25
BR0109835A (en) 2003-06-24
TW540240B (en) 2003-07-01
MXPA02009818A (en) 2003-03-27
JP2003530785A (en) 2003-10-14
HK1041143A1 (en) 2002-06-28
AU2001260138B2 (en) 2003-12-18
HK1041143B (en) 2009-05-08
CN1421097A (en) 2003-05-28
EP1143722A1 (en) 2001-10-10
WO2001078387A2 (en) 2001-10-18
US20030152364A1 (en) 2003-08-14
JP4772252B2 (en) 2011-09-14
AU6013801A (en) 2001-10-23
CN1190077C (en) 2005-02-16

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