CA2544623A1 - Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system - Google Patents

Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system Download PDF

Info

Publication number
CA2544623A1
CA2544623A1 CA002544623A CA2544623A CA2544623A1 CA 2544623 A1 CA2544623 A1 CA 2544623A1 CA 002544623 A CA002544623 A CA 002544623A CA 2544623 A CA2544623 A CA 2544623A CA 2544623 A1 CA2544623 A1 CA 2544623A1
Authority
CA
Canada
Prior art keywords
stream
encrypted
clear
packets
encryption
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002544623A
Other languages
French (fr)
Other versions
CA2544623C (en
Inventor
Howard G. Pinder
William D. Woodward, Jr.
Jonathan Bradford Evans
Anthony J. Wasilewski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scientific Atlanta LLC
Original Assignee
Scientific-Atlanta, Inc.
Howard G. Pinder
William D. Woodward, Jr.
Jonathan Bradford Evans
Anthony J. Wasilewski
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
Priority claimed from US10/602,986 external-priority patent/US8548166B2/en
Application filed by Scientific-Atlanta, Inc., Howard G. Pinder, William D. Woodward, Jr., Jonathan Bradford Evans, Anthony J. Wasilewski filed Critical Scientific-Atlanta, Inc.
Publication of CA2544623A1 publication Critical patent/CA2544623A1/en
Application granted granted Critical
Publication of CA2544623C publication Critical patent/CA2544623C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • H04L63/0478—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload applying multiple layers of encryption, e.g. nested tunnels or encrypting the content with a first key and then with at least a second key
    • 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
    • H04N21/21—Server components or server architectures
    • H04N21/226—Characteristics of the server or Internal components of the server
    • H04N21/2265—Server identification by a unique number or address, e.g. serial number
    • 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, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • H04N21/23476—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption by partially encrypting, e.g. encrypting the ending portion of a movie
    • 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
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/23608—Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
    • 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
    • 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
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • 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
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/43607—Interfacing a plurality of external cards, e.g. through a DVB Common Interface [DVB-CI]
    • 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
    • H04N21/4508—Management of client data or end-user data
    • H04N21/4524—Management of client data or end-user data involving the geographical location of the client
    • 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
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/163—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing by receiver means only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17345—Control of the passage of the selected programme
    • H04N7/17354—Control of the passage of the selected programme in an intermediate station common to a plurality of user terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0073—Services, e.g. multimedia, GOS, QOS
    • H04J2203/008—Support of video
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2463/00—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00
    • H04L2463/101—Additional details relating to network architectures or network communication protocols for network security covered by H04L63/00 applying security measures for digital rights management

Abstract

The present invention is directed towards providing a partial dual-encrypted stream in a conditional access overlay system. The headend equipment includes an aligner, identifier, and remapper (AIR) device (615) that receives a clear stream and one or two encrypted streams, where the two encrypted streams have been encrypted by two different encryption schemes. The AIR
device (615) identifies critical packets associated with the clear stream and subsequently allows two encrypted streams to pass and drops the critical packets of the clear stream. A multiplexer (640) then combines a percentage of the non-critical packets of the clear stream and the critical packets of the two encrypted streams to provide the partial dual-encrypted stream.

Claims (20)

1. A method for providing an encrypted transport stream, the method comprising the steps of:
receiving a clear stream, the clear stream including a plurality of programs, each program comprising a plurality of packets each having a packet identifier (PID), wherein at least one of the plurality of packets is designated a critical packet;
scrambling the clear stream according to a first encryption method to provide a first encryption stream;
scrambling the clear stream according to a second encryption method to provide a second encryption stream;
aligning in time the clear stream, the first encryption stream, and the second encryption stream;
passing packets of the clear stream through a multiplexer, wherein when the at least one critical packet is identified in the packets of the clear stream, the critical packet of the clear stream drops and the scrambled critical packets included in the first and second encryption streams pass;
and multiplexing the packets of the clear stream and the critical packets of the first and second encryption streams to provide a partial dual encrypted stream.
2. The method of claim 1, the steps further comprising remapping at least one PID value associated with the second encryption stream, whereby the scrambled packets of the first and second encryption streams each have a differing PID value.
3. The method of claim 1, wherein the aligning step comprises buffering each of the clear stream, the first encryption stream, and the second encryption stream.
4. The method of claim 3, the aligning step comprising the further steps of:
searching the clear stream for a reference packet; and comparing the reference packet with packets in the first encryption stream and the second encryption stream, wherein the packets associated with the clear stream passes and the packets associated with the first and second encryption streams drop until the packets associated with the first and second encryption stream match the reference packet.
5. The method of claim 1, comprising the further step of demultiplexing each of the clear stream and the first and second encryption streams to provide a plurality of programs.
6. The method of claim 5, wherein a common program demultiplexed from each stream is provided to a common aligner, identifier, and remapper device.
7. A partial dual-encryption device, comprising:
a port for providing a first encrypted stream from a first scrambler;
a port for providing a second encrypted stream from a second scrambler;
an aligner, identifier, and remapper (AIR) device coupled to each scrambler for providing a partial dual-encrypted stream, wherein a clear stream having at least one critical packet is provided to each scrambler and the AIR device, wherein the AIR device aligns packets of the clear stream, the first encrypted stream, and the second encrypted stream, and wherein, upon identification of the at least one critical packet of the clear stream, provides the partial dual-encrypted stream including non-critical packets of the clear stream, a critical packet of the first encrypted stream, and a remapped critical packet of the second encrypted stream.
8. The partial dual-encryption device of claim 7, the AIR device comprising:
an aligner for aligning the packets associated with the clear stream, the first encrypted stream, and the second encrypted stream;
an identifier for identifying the at least one critical packet; and a remapper for remapping a packet identifier (PID) value associated with the second encrypted stream, the aligner comprising:
buffers for buffering the clear stream, the first encrypted stream, and the second encrypted stream; and a packet comparator for comparing a head packet associated with each stream in a buffer to determine when the buffered streams are aligned and subsequently releasing the streams for further processing.
9. The partial dual-encryption device of claim 8, the AIR device further comprising:
switches responsive to the identifier for allowing one of the packets associated with the clear stream and the packets associated with the first and second encrypted streams to pass through to a multiplexer.
10. The partial dual-encryption device of claim 7, further comprising:
a first demultiplexer coupled to the first scrambler to provide a plurality of first encrypted program streams;
a second demultiplexer coupled to the second scrambler to provide a plurality of second encrypted program streams; and a third demultiplexer for providing a plurality of clear program streams, wherein the demultiplexed program streams are provided to the AIR and processed as a common program.
11. The partial dual-encryption device of claim 10, wherein the AIR device includes a plurality of program AIR devices depending upon the number of common programs.
12. The partial dual-encryption device of claim 11, further comprising a common multiplexer for multiplexing the partial dual-encrypted stream from each of the plurality of program AIR
devices.
13. The partial dual-encryption device of claim 12, wherein the common multiplexer provides feedback to each of the program AIR devices that indicates availability of bandwidth for when the number of critical packets of the first encrypted stream and the remapped critical packets of the second encrypted stream can be increased.
14. A method for transmitting an encrypted transport stream, the method comprising the steps of:
receiving a clear stream, the clear stream including a plurality of programs, each program comprising a plurality of packets each having a packet identifier (PID), wherein at least one of the plurality of packets is designated a critical packet;
scrambling with a first scrambler the clear stream according to a first encryption method to provide a first encrypted stream;
aligning in time the clear stream and the first encrypted stream;
identifying the at least one critical packet associated with the clear stream, wherein prior to identification, packets associated with the clear stream pass to a multiplexer and encrypted packets associated with the first encrypted stream drop, and wherein subsequent to identification, packets associated with the clear stream pass to a second scrambler and encrypted packets associated with the first encrypted stream pass to the multiplexer, wherein the second scrambler provides a second encrypted stream to the multiplexer; and multiplexing non-critical packets associated with the clear stream and the encrypted critical packets associated with the first and second encrypted streams to provide a partial dual-encrypted stream.
15. The method of claim 1, the steps further comprising remapping the second encrypted stream to a new PID value.
16. A partial dual-encryption device, comprising:
a port for providing a first encrypted stream from a first scrambler;
an aligner, identifier, and remapper (AIR) device coupled to the scrambler for providing a partial dual-encrypted stream, wherein a clear stream having at least one critical packet is provided to the scrambler and the AIR device, wherein the AIR device aligns packets of the clear stream and the first encrypted stream, and identifies the at least one critical packet associated with the clear stream, wherein, upon identification of the at least one critical packet, provides the at least one critical packet to a second scrambler, the second scrambler to provide a second encrypted stream, and wherein the AIR device provides the partial dual-encrypted stream including non-critical packets associated with the clear stream and dually-encrypted critical packets associated with the first and second encrypted streams.
17. The partial dual-encryption device of claim 16, the AIR device comprising:
an aligner for aligning the packets associated with the clear stream and the first encrypted stream;
an identifier for identifying the a critical packet associated with the clear stream; and a first switch responsive to the identifier for providing one of the non-critical packets associated with the clear stream to a multiplexer and the critical packet associated with the clear stream to a second scrambler;
a second switch responsive to the identifier, wherein upon identification of the critical packet, the second switch for providing a first encrypted critical packet of the first encrypted stream to the multiplexer;
the second scrambler coupled to the first switch for receiving the critical packet associated with the clear stream and providing a second encrypted critical packet; and a remapper for remapping the second encrypted packet to provide a remapped encrypted critical packet.
18. The partial dual-encryption device of claim 17, the AIR device comprising:
a first demultiplexer coupled to the first scrambler to provide a plurality of first encrypted program streams; and a second demultiplexer for providing a plurality of clear program streams, wherein the demultiplexed program streams are provided to the AIR device and processed according to a common program stream.
19. The partial dual-encryption device of claim 18, wherein the AIR device includes a plurality of program AIR devices depending upon the number of common program streams.
20. The partial dual-encryption device of claim 19, further comprising a common multiplexer for multiplexing the partial dual-encrypted stream from each of the plurality of program AIR
devices, wherein the common multiplexer provides feedback to each of the program AIR devices that indicates availability of bandwidth for when the number of critical packets of the first encrypted stream and the remapped encrypted critical packets of the second encrypted stream can be increased.
CA2544623A 2003-06-25 2004-06-18 Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system Expired - Fee Related CA2544623C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US10/602,986 2003-06-25
US10/602,986 US8548166B2 (en) 1995-04-03 2003-06-25 Method for partially encrypting program data
US10/629,839 US7224798B2 (en) 1995-04-03 2003-07-30 Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system
US10/629,839 2003-07-30
PCT/US2004/019508 WO2005004458A2 (en) 2003-06-25 2004-06-18 Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system

Publications (2)

Publication Number Publication Date
CA2544623A1 true CA2544623A1 (en) 2005-01-13
CA2544623C CA2544623C (en) 2010-05-04

Family

ID=33568005

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2544623A Expired - Fee Related CA2544623C (en) 2003-06-25 2004-06-18 Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system

Country Status (7)

Country Link
US (2) US7224798B2 (en)
EP (1) EP1656792B1 (en)
JP (1) JP2007526664A (en)
KR (1) KR101096975B1 (en)
CA (1) CA2544623C (en)
MX (1) MXPA05014208A (en)
WO (1) WO2005004458A2 (en)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8548166B2 (en) * 1995-04-03 2013-10-01 Anthony J. Wasilewski Method for partially encrypting program data
US7224798B2 (en) * 1995-04-03 2007-05-29 Scientific-Atlanta, Inc. Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system
US6937729B2 (en) * 1995-04-03 2005-08-30 Scientific-Atlanta, Inc. Representing entitlements to service in a conditional access system
US7515712B2 (en) * 1997-08-01 2009-04-07 Cisco Technology, Inc. Mechanism and apparatus for encapsulation of entitlement authorization in conditional access system
US7730300B2 (en) 1999-03-30 2010-06-01 Sony Corporation Method and apparatus for protecting the transfer of data
US6697489B1 (en) 1999-03-30 2004-02-24 Sony Corporation Method and apparatus for securing control words
US7565546B2 (en) * 1999-03-30 2009-07-21 Sony Corporation System, method and apparatus for secure digital content transmission
US7039614B1 (en) 1999-11-09 2006-05-02 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices
US7895616B2 (en) 2001-06-06 2011-02-22 Sony Corporation Reconstitution of program streams split across multiple packet identifiers
US7747853B2 (en) 2001-06-06 2010-06-29 Sony Corporation IP delivery of secure digital content
US7124303B2 (en) * 2001-06-06 2006-10-17 Sony Corporation Elementary stream partial encryption
US7215770B2 (en) * 2002-01-02 2007-05-08 Sony Corporation System and method for partially encrypted multimedia stream
US7765567B2 (en) 2002-01-02 2010-07-27 Sony Corporation Content replacement by PID mapping
US7823174B2 (en) 2002-01-02 2010-10-26 Sony Corporation Macro-block based content replacement by PID mapping
US7292691B2 (en) * 2002-01-02 2007-11-06 Sony Corporation Progressive video refresh slice detection
US7292690B2 (en) * 2002-01-02 2007-11-06 Sony Corporation Video scene change detection
US7155012B2 (en) * 2002-01-02 2006-12-26 Sony Corporation Slice mask and moat pattern partial encryption
US7218738B2 (en) * 2002-01-02 2007-05-15 Sony Corporation Encryption and content control in a digital broadcast system
US8818896B2 (en) 2002-09-09 2014-08-26 Sony Corporation Selective encryption with coverage encryption
US7724907B2 (en) 2002-11-05 2010-05-25 Sony Corporation Mechanism for protecting the transfer of digital content
US8572408B2 (en) 2002-11-05 2013-10-29 Sony Corporation Digital rights management of a digital device
US8667525B2 (en) 2002-12-13 2014-03-04 Sony Corporation Targeted advertisement selection from a digital stream
US8645988B2 (en) 2002-12-13 2014-02-04 Sony Corporation Content personalization for digital content
WO2004086664A2 (en) * 2003-03-27 2004-10-07 Nds Limited Improved cfm mode system
US20050097597A1 (en) * 2003-10-31 2005-05-05 Pedlow Leo M.Jr. Hybrid storage of video on demand content
US7853980B2 (en) 2003-10-31 2010-12-14 Sony Corporation Bi-directional indices for trick mode video-on-demand
US8396216B2 (en) 2003-11-21 2013-03-12 Howard G. Pinder Partial dual-encryption using program map tables
US7490236B2 (en) * 2004-01-14 2009-02-10 Cisco Technology, Inc. Conditional access overlay partial encryption using MPEG transport continuity counter
US20060047601A1 (en) * 2004-08-25 2006-03-02 General Instrument Corporation Method and apparatus for providing channel key data
US7675872B2 (en) * 2004-11-30 2010-03-09 Broadcom Corporation System, method, and apparatus for displaying pictures
US7895617B2 (en) 2004-12-15 2011-02-22 Sony Corporation Content substitution editor
US8041190B2 (en) 2004-12-15 2011-10-18 Sony Corporation System and method for the creation, synchronization and delivery of alternate content
KR101132296B1 (en) 2005-05-02 2012-04-05 엔디에스 리미티드 Native scrambling system
US20070006253A1 (en) * 2005-06-29 2007-01-04 Pinder Howard G Partial pre-encryption with network-based packet sorting
US8185921B2 (en) 2006-02-28 2012-05-22 Sony Corporation Parental control of displayed content using closed captioning
US8275132B2 (en) * 2006-05-15 2012-09-25 Buchen Neil B System and method for dynamically allocating stream identifiers in a multi-encryption transport system
US7983417B2 (en) * 2006-05-15 2011-07-19 Buchen Neil B System and method for dynamically allocating stream identifiers in a multi-encryption transport system
US7965839B2 (en) * 2008-02-19 2011-06-21 Sony Corporation Encryption system for satellite delivered television
US20090242653A1 (en) * 2008-03-27 2009-10-01 Needham Robert M Enviromentally distinctive cabin design and integrated recovery system
EP2219374A1 (en) * 2009-02-13 2010-08-18 Irdeto Access B.V. Securely providing a control word from a smartcard to a conditional access module
MX2013011549A (en) * 2011-04-15 2013-11-01 Nagravision Sa Method to identify the origin of a security module in pay-tv decoder system.
US9008308B2 (en) * 2012-02-08 2015-04-14 Vixs Systems, Inc Container agnostic decryption device and methods for use therewith
WO2013128273A1 (en) 2012-03-01 2013-09-06 Ologn Technologies Ag Systems, methods and apparatuses for the secure transmission and restricted use of media content
US9559845B2 (en) 2012-03-01 2017-01-31 Ologn Technologies Ag Systems, methods and apparatuses for the secure transmission of media content
CN111954047A (en) * 2019-05-17 2020-11-17 武汉佳世创科技有限公司 Method and device for descrambling two paths of code streams by single CAM card

Family Cites Families (146)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6292568B1 (en) 1966-12-16 2001-09-18 Scientific-Atlanta, Inc. Representing entitlements to service in a conditional access system
US5870474A (en) 1995-12-04 1999-02-09 Scientific-Atlanta, Inc. Method and apparatus for providing conditional access in connection-oriented, interactive networks with a multiplicity of service providers
US5742677A (en) 1995-04-03 1998-04-21 Scientific-Atlanta, Inc. Information terminal having reconfigurable memory
US4150404A (en) 1975-07-08 1979-04-17 U.S. Philips Corporation Device for transferring digital information
US4155042A (en) 1977-10-31 1979-05-15 Permut Alan R Disaster alert system
US4405829A (en) 1977-12-14 1983-09-20 Massachusetts Institute Of Technology Cryptographic communications system and method
US4862268A (en) 1980-03-31 1989-08-29 General Instrument Corporation Addressable cable television control system with video format data transmission
US4358672A (en) 1980-05-16 1982-11-09 The Telemine Company, Inc. Pay per view television control device
USRE33808E (en) 1980-10-21 1992-01-28 Information Resources, Inc. Cable television with multi-event signal substitution
US4388643A (en) 1981-04-06 1983-06-14 Northern Telecom Limited Method of controlling scrambling and unscrambling in a pay TV system
US4694490A (en) 1981-11-03 1987-09-15 Harvey John C Signal processing apparatus and methods
USRE33189E (en) 1981-11-19 1990-03-27 Communications Satellite Corporation Security system for SSTV encryption
US4531020A (en) 1982-07-23 1985-07-23 Oak Industries Inc. Multi-layer encryption system for the broadcast of encrypted information
US4613901A (en) 1983-05-27 1986-09-23 M/A-Com Linkabit, Inc. Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
WO1985000491A1 (en) 1983-06-30 1985-01-31 Independent Broadcasting Authority Encrypted broadcast television system
US4658093A (en) 1983-07-11 1987-04-14 Hellman Martin E Software distribution system
US4600921A (en) 1983-10-19 1986-07-15 Zenith Radio Corporation Full-field teletext system with dynamic addressability
US4649533A (en) 1983-10-25 1987-03-10 Keycom Electronic Publishing Method and apparatus for retrieving remotely located information
US4599647A (en) 1983-11-03 1986-07-08 General Instrument Corporation Receiver with interface for interaction with controller-decoder
US4712238A (en) 1984-06-08 1987-12-08 M/A-Com Government Systems, Inc. Selective-subscription descrambling
GB2163577B (en) 1984-08-23 1988-01-13 Nat Res Dev Software protection device
JPS6181043A (en) * 1984-09-28 1986-04-24 Fujitsu Ltd Cipher processing system of packet communication
US4887296A (en) 1984-10-26 1989-12-12 Ricoh Co., Ltd. Cryptographic system for direct broadcast satellite system
US5036537A (en) 1984-11-19 1991-07-30 General Instrument Corp. Geographic black-out method for direct broadcast satellite system
US4982430A (en) 1985-04-24 1991-01-01 General Instrument Corporation Bootstrap channel security arrangement for communication network
US4885777A (en) 1985-09-04 1989-12-05 Hitachi, Ltd. Electronic transaction system
US5018196A (en) 1985-09-04 1991-05-21 Hitachi, Ltd. Method for electronic transaction with digital signature
US4718107A (en) 1986-02-14 1988-01-05 Rca Corporation Parental control for CATV converters
US4712239A (en) 1986-06-16 1987-12-08 General Instrument Corporation Security arrangement for downloadable cable television converters
US4866770A (en) 1986-07-08 1989-09-12 Scientific Atlanta, Inc. Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system
US4937866A (en) 1986-08-13 1990-06-26 U.S. Philips Corporation System for decoding transmitted scrambled signals
US4837820A (en) 1986-10-17 1989-06-06 Zenith Electronics Corporation Hybrid CATV scrambling system
DE3642629A1 (en) 1986-12-13 1988-06-23 Grundig Emv SYSTEM FOR PROCESSING ENCRYPTED TRANSFER INFORMATION
EP0287720B1 (en) 1987-04-22 1992-01-08 International Business Machines Corporation Management of cryptographic keys
JP2807244B2 (en) * 1987-09-14 1998-10-08 ブリテツシユ・テレコミユニケイシヨンズ・パブリツク・リミテツド・カンパニー Digital signal communication method and receiver using the method
US4864615A (en) 1988-05-27 1989-09-05 General Instrument Corporation Reproduction of secure keys by using distributed key generation data
NL8900307A (en) 1989-02-08 1990-09-03 Philips Nv PUBLIC COMMUNICATION SYSTEM WITH DISTRIBUTED STATIONS, AND STATION AND SUBSTATIONS FOR USE IN SUCH A COMMUNICATION SYSTEM.
US5175765A (en) 1989-05-09 1992-12-29 Digital Equipment Corporation Robust data broadcast over a distributed network with malicious failures
US5151782A (en) 1989-05-17 1992-09-29 Reiss Media Enterprises Control system for satellite delivered pay-per-view television system
US5003591A (en) 1989-05-25 1991-03-26 General Instrument Corporation Functionally modifiable cable television converter system
US5081678A (en) 1989-06-28 1992-01-14 Digital Equipment Corporation Method for utilizing an encrypted key as a key identifier in a data packet in a computer network
JP2606419B2 (en) 1989-08-07 1997-05-07 松下電器産業株式会社 Cryptographic communication system and cryptographic communication method
US5155591A (en) 1989-10-23 1992-10-13 General Instrument Corporation Method and apparatus for providing demographically targeted television commercials
US5282249A (en) 1989-11-14 1994-01-25 Michael Cohen System for controlling access to broadcast transmissions
US4993068A (en) 1989-11-27 1991-02-12 Motorola, Inc. Unforgeable personal identification system
US5237610A (en) 1990-02-01 1993-08-17 Scientific-Atlanta, Inc. Independent external security module for a digitally upgradeable television signal decoder
US5029207A (en) 1990-02-01 1991-07-02 Scientific-Atlanta, Inc. External security module for a television signal decoder
US5073935A (en) 1990-12-17 1991-12-17 Jose Pastor Method for secure communication
KR930005441B1 (en) 1991-05-03 1993-06-21 삼성전자 주식회사 Tv receivers selection control circuit
US5235643A (en) 1991-05-21 1993-08-10 Anderson Steven E Satellite receiver retuning system
FR2680589A1 (en) 1991-08-19 1993-02-26 France Telecom METHOD OF TRANSMITTING AND RECEIVING CUSTOM PROGRAMS.
US5142578A (en) 1991-08-22 1992-08-25 International Business Machines Corporation Hybrid public key algorithm/data encryption algorithm key distribution method based on control vectors
US5282248A (en) 1991-09-20 1994-01-25 Dejoy Victor P Time limited signal conduction system
US5231664A (en) 1991-11-14 1993-07-27 Zenith Electronics Corporation Cable system having multiple barkering
US5231665A (en) 1991-11-20 1993-07-27 Zenith Electronics Corporation Cable television system having dynamic market code shuffling
US5249230A (en) 1991-11-21 1993-09-28 Motorola, Inc. Authentication system
US5565909A (en) 1992-08-31 1996-10-15 Television Computer, Inc. Method of identifying set-top receivers
US5432542A (en) 1992-08-31 1995-07-11 Television Computer, Inc. Television receiver location identification
US5402490A (en) 1992-09-01 1995-03-28 Motorola, Inc. Process for improving public key authentication
US5243652A (en) 1992-09-30 1993-09-07 Gte Laboratories Incorporated Location-sensitive remote database access control
US5359601A (en) 1992-10-30 1994-10-25 Scientific-Atlanta, Inc. Apparatus providing dynamic virtual service selection in a multi-service communications system
US5418782A (en) 1992-10-30 1995-05-23 Scientific-Atlanta, Inc. Methods and apparatus for providing virtual service selection in a multi-service communications system
US5400401A (en) 1992-10-30 1995-03-21 Scientific Atlanta, Inc. System and method for transmitting a plurality of digital services
FR2698510B1 (en) 1992-11-26 1994-12-23 Schlumberger Ind Sa Communication network.
US5341425A (en) 1992-12-02 1994-08-23 Scientific Atlanta, Inc. Methods and apparatus for uniquely encrypting data at a plurality of data transmission sites for transmission to a reception site
US5465299A (en) 1992-12-03 1995-11-07 Hitachi, Ltd. Electronic document processing system and method of forming digital signature
US5523781A (en) 1993-02-11 1996-06-04 Precision Industries, Incorporated System for controlling television and billing for its use
US5381477A (en) 1993-02-16 1995-01-10 Scientific-Atlanta, Inc. Method of selecting cable television converter groups
FR2703552A1 (en) 1993-03-31 1994-10-07 Philips Electronics Nv Method and apparatus for scrambling and descrambling a specific television program
US5285497A (en) 1993-04-01 1994-02-08 Scientific Atlanta Methods and apparatus for scrambling and unscrambling compressed data streams
US5381481A (en) 1993-08-04 1995-01-10 Scientific-Atlanta, Inc. Method and apparatus for uniquely encrypting a plurality of services at a transmission site
US5506904A (en) 1993-08-04 1996-04-09 Scientific-Atlanta, Inc. System and method for transmitting and receiving variable length authorization control for digital services
IL106746A (en) 1993-08-19 1997-02-18 News Datacom Ltd CATV systems
US5440633A (en) 1993-08-25 1995-08-08 International Business Machines Corporation Communication network access method and system
IL106796A (en) 1993-08-25 1997-11-20 Algorithmic Res Ltd Broadcast encryption
US5499295A (en) 1993-08-31 1996-03-12 Ericsson Inc. Method and apparatus for feature authorization and software copy protection in RF communications devices
US5585866A (en) 1993-09-09 1996-12-17 Miller; Larry Electronic television program guide schedule system and method including virtual channels
US5497422A (en) 1993-09-30 1996-03-05 Apple Computer, Inc. Message protection mechanism and graphical user interface therefor
US5343527A (en) 1993-10-27 1994-08-30 International Business Machines Corporation Hybrid encryption method and system for protecting reusable software components
US5488410A (en) 1993-10-29 1996-01-30 Telectronics Pacing Systems, Inc. System and method for disk software publishers to control disk distribution
US5481542A (en) 1993-11-10 1996-01-02 Scientific-Atlanta, Inc. Interactive information services control system
US5499294A (en) 1993-11-24 1996-03-12 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Digital camera with apparatus for authentication of images produced from an image file
US5425101A (en) 1993-12-03 1995-06-13 Scientific-Atlanta, Inc. System and method for simultaneously authorizing multiple virtual channels
US5519780A (en) 1993-12-03 1996-05-21 Scientific-Atlanta, Inc. System and method for providing compressed digital teletext services and teletext support services
US5787172A (en) 1994-02-24 1998-07-28 The Merdan Group, Inc. Apparatus and method for establishing a cryptographic link between elements of a system
US5420866A (en) 1994-03-29 1995-05-30 Scientific-Atlanta, Inc. Methods for providing conditional access information to decoders in a packet-based multiplexed communications system
FR2718594B1 (en) 1994-04-06 1996-04-26 France Telecom Method for broadcasting programs with progressive conditional access and separating the flow of information.
US5481613A (en) 1994-04-15 1996-01-02 Northern Telecom Limited Computer network cryptographic key distribution system
US5619501A (en) 1994-04-22 1997-04-08 Thomson Consumer Electronics, Inc. Conditional access filter as for a packet video signal inverse transport system
US5734589A (en) 1995-01-31 1998-03-31 Bell Atlantic Network Services, Inc. Digital entertainment terminal with channel mapping
US5473692A (en) 1994-09-07 1995-12-05 Intel Corporation Roving software license for a hardware agent
US5557678A (en) 1994-07-18 1996-09-17 Bell Atlantic Network Services, Inc. System and method for centralized session key distribution, privacy enhanced messaging and information distribution using a split private key public cryptosystem
US5557765A (en) 1994-08-11 1996-09-17 Trusted Information Systems, Inc. System and method for data recovery
MY125706A (en) 1994-08-19 2006-08-30 Thomson Consumer Electronics High speed signal processing smart card
US5550984A (en) 1994-12-07 1996-08-27 Matsushita Electric Corporation Of America Security system for preventing unauthorized communications between networks by translating communications received in ip protocol to non-ip protocol to remove address and routing services information
EP0719045B1 (en) 1994-12-13 2003-10-29 Mitsubishi Corporation Crypt key system for secure electronic transactions
BR9510128A (en) 1994-12-30 1997-12-30 Thomson Consumer Electronics Modem with automatic callback provisions
FR2729521A1 (en) 1995-01-17 1996-07-19 Thomson Consumer Electronics METHOD FOR PROTECTING MANAGEMENT MESSAGES OF AN ACCESS CONTROL SYSTEM AND DEVICE FOR IMPLEMENTING SAID METHOD
US5590202A (en) 1995-01-18 1996-12-31 Zenith Electronics Corporation Countdown system for conditional access module
US5568554A (en) 1995-01-31 1996-10-22 Digital Equipment Corporation Method for improving the processing and storage performance of digital signature schemes
US5559889A (en) 1995-03-31 1996-09-24 International Business Machines Corporation System and methods for data encryption using public key cryptography
US6005938A (en) 1996-12-16 1999-12-21 Scientific-Atlanta, Inc. Preventing replay attacks on digital information distributed by network service providers
US6252964B1 (en) 1995-04-03 2001-06-26 Scientific-Atlanta, Inc. Authorization of services in a conditional access system
US6937729B2 (en) 1995-04-03 2005-08-30 Scientific-Atlanta, Inc. Representing entitlements to service in a conditional access system
US6246767B1 (en) 1995-04-03 2001-06-12 Scientific-Atlanta, Inc. Source authentication of download information in a conditional access system
US6424717B1 (en) 1995-04-03 2002-07-23 Scientific-Atlanta, Inc. Encryption devices for use in a conditional access system
US6157719A (en) 1995-04-03 2000-12-05 Scientific-Atlanta, Inc. Conditional access system
US8548166B2 (en) 1995-04-03 2013-10-01 Anthony J. Wasilewski Method for partially encrypting program data
US7224798B2 (en) 1995-04-03 2007-05-29 Scientific-Atlanta, Inc. Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system
US20040136532A1 (en) 1995-04-03 2004-07-15 Pinder Howard G. Partial dual-encrypted stream utilizing program map tables
US6560340B1 (en) 1995-04-03 2003-05-06 Scientific-Atlanta, Inc. Method and apparatus for geographically limiting service in a conditional access system
US6108365A (en) 1995-05-05 2000-08-22 Philip A. Rubin And Associates, Inc. GPS data access system
US5621793A (en) 1995-05-05 1997-04-15 Rubin, Bednarek & Associates, Inc. TV set top box using GPS
US5600378A (en) 1995-05-22 1997-02-04 Scientific-Atlanta, Inc. Logical and composite channel mapping in an MPEG network
US5583939A (en) 1995-06-01 1996-12-10 Chung N. Chang Secure, swift cryptographic key exchange
US5671276A (en) 1995-07-21 1997-09-23 General Instrument Corporation Of Delaware Method and apparatus for impulse purchasing of packaged information services
US6035037A (en) 1995-08-04 2000-03-07 Thomson Electronic Consumers, Inc. System for processing a video signal via series-connected high speed signal processing smart cards
KR0166923B1 (en) 1995-09-18 1999-03-20 구자홍 Method and apparatus of preventing an illegal watching and copying in a digital broadcasting system
EP0800745B1 (en) 1995-10-31 2003-09-17 Koninklijke Philips Electronics N.V. Time-shifted conditional access
US6067564A (en) 1995-10-31 2000-05-23 Sanyo Electric Co., Ltd. Pay broadcasting receiver apparatus
US5764770A (en) 1995-11-07 1998-06-09 Trimble Navigation Limited Image authentication patterning
US5680458A (en) 1995-11-14 1997-10-21 Microsoft Corporation Root key compromise recovery
US5675649A (en) 1995-11-30 1997-10-07 Electronic Data Systems Corporation Process for cryptographic key generation and safekeeping
US5857020A (en) 1995-12-04 1999-01-05 Northern Telecom Ltd. Timed availability of secured content provisioned on a storage medium
DE872077T1 (en) 1995-12-29 1999-05-06 Scientific Atlanta METHOD AND DEVICE FOR CONDITIONAL ACCESS IN CONNECTION-ORIENTED INTERACTIVE NETWORKS WITH SEVERAL SERVICE PROVIDERS
US5870475A (en) 1996-01-19 1999-02-09 Northern Telecom Limited Facilitating secure communications in a distribution network
US5828419A (en) 1996-02-29 1998-10-27 Hughes Electronics Method and apparatus for generating television program guides utilizing icons
US5969748A (en) 1996-05-29 1999-10-19 Starsight Telecast, Inc. Television schedule system with access control
US5862220A (en) 1996-06-03 1999-01-19 Webtv Networks, Inc. Method and apparatus for using network address information to improve the performance of network transactions
US6041123A (en) 1996-07-01 2000-03-21 Allsoft Distributing Incorporated Centralized secure communications system
US5793427A (en) 1996-10-11 1998-08-11 Divicom Inc. Processing system with delta-based video data encoding
US5907619A (en) 1996-12-20 1999-05-25 Intel Corporation Secure compressed imaging
US5920626A (en) 1996-12-20 1999-07-06 Scientific-Atlanta, Inc. Analog/digital system for television services
US7515712B2 (en) 1997-08-01 2009-04-07 Cisco Technology, Inc. Mechanism and apparatus for encapsulation of entitlement authorization in conditional access system
DE69808113T2 (en) 1997-08-01 2003-05-22 Scientific Atlanta SOURCE AUTHENTICATION OF REMOTE LOADING INFORMATION IN A SYSTEM WITH CONDITIONAL ACCESS
BR9815610A (en) 1997-08-01 2004-06-22 Scientific Atlanta Verification of program information source in conditional access system
US7039614B1 (en) 1999-11-09 2006-05-02 Sony Corporation Method for simulcrypting scrambled data to a plurality of conditional access devices
US7216358B1 (en) 1999-11-19 2007-05-08 Smardtv Sa Digital television conditional access methods and apparatus with multiple data transport mechanism
JP2002271322A (en) * 2001-03-13 2002-09-20 Mitsubishi Electric Corp Scrambling method, transmitter/receiver and receiver using that method
US7895616B2 (en) 2001-06-06 2011-02-22 Sony Corporation Reconstitution of program streams split across multiple packet identifiers
US7124303B2 (en) * 2001-06-06 2006-10-17 Sony Corporation Elementary stream partial encryption
US7092616B2 (en) 2001-07-19 2006-08-15 Sony Electronics Inc. Method and apparatus for copy protecting video content and producing a reduced quality reproduction of video content for personal use
JP4000809B2 (en) * 2001-10-10 2007-10-31 ソニー株式会社 Encryption / decryption device
US7376233B2 (en) 2002-01-02 2008-05-20 Sony Corporation Video slice and active region based multiple partial encryption
US8396216B2 (en) 2003-11-21 2013-03-12 Howard G. Pinder Partial dual-encryption using program map tables
US7490236B2 (en) 2004-01-14 2009-02-10 Cisco Technology, Inc. Conditional access overlay partial encryption using MPEG transport continuity counter

Also Published As

Publication number Publication date
US7805399B2 (en) 2010-09-28
EP1656792A2 (en) 2006-05-17
KR101096975B1 (en) 2011-12-20
JP2007526664A (en) 2007-09-13
CA2544623C (en) 2010-05-04
US20040139337A1 (en) 2004-07-15
EP1656792A4 (en) 2010-03-17
EP1656792B1 (en) 2013-08-14
WO2005004458A2 (en) 2005-01-13
KR20060073894A (en) 2006-06-29
WO2005004458A3 (en) 2006-05-18
MXPA05014208A (en) 2006-03-13
US7224798B2 (en) 2007-05-29
US20070286417A1 (en) 2007-12-13

Similar Documents

Publication Publication Date Title
CA2544623A1 (en) Methods and apparatus for providing a partial dual-encrypted stream in a conditional access overlay system
EP1642459B1 (en) A partial dual-encrypted stream utilizing program map tables
US8396216B2 (en) Partial dual-encryption using program map tables
CA2606395C (en) Processing an mpeg elementary stream in a conditional access overlay environment
JP3599681B2 (en) Device for demultiplexing transport streams
EP1709805B1 (en) Conditional access overlay partial encryption using mpeg transport continuity counter
US20070291942A1 (en) Scene change detection
NZ600198A (en) Content receiving device, content reproducing device, content receiving and reproducing device, content receiving method, and program
CN101536394B (en) Native scrambling system
CN110366049A (en) A kind of stream-type video completeness protection method
JP2008160722A (en) Ts switching and sending apparatus
JP2007181018A (en) Data distributing/receiving system, data re-distributor, data receiver, and their methods
KR100705978B1 (en) method and device for readjusting timeline
CA2406329A1 (en) Decoding and decryption of partially encrypted information

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20180618