GB0308380D0 - Methods and apparatus for encryption and decryption - Google Patents

Methods and apparatus for encryption and decryption

Info

Publication number
GB0308380D0
GB0308380D0 GB0308380A GB0308380A GB0308380D0 GB 0308380 D0 GB0308380 D0 GB 0308380D0 GB 0308380 A GB0308380 A GB 0308380A GB 0308380 A GB0308380 A GB 0308380A GB 0308380 D0 GB0308380 D0 GB 0308380D0
Authority
GB
United Kingdom
Prior art keywords
decryption
encryption
methods
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.)
Withdrawn
Application number
GB0308380A
Other versions
GB2387518A (en
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.)
CYPHAWARE Ltd
Original Assignee
CYPHAWARE Ltd
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 CYPHAWARE Ltd filed Critical CYPHAWARE Ltd
Publication of GB0308380D0 publication Critical patent/GB0308380D0/en
Publication of GB2387518A publication Critical patent/GB2387518A/en
Withdrawn legal-status Critical Current

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]
    • H04N21/40—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
    • H04N21/439—Processing of audio elementary streams
    • 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
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
GB0308380A 2002-04-13 2003-04-11 Encryption and decryption of MPEG data streams Withdrawn GB2387518A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0208536A GB0208536D0 (en) 2002-04-13 2002-04-13 Copy protection and restricted viewing software programmes for MPEG1 encoded video data and MP3 audio subset of codec

Publications (2)

Publication Number Publication Date
GB0308380D0 true GB0308380D0 (en) 2003-05-21
GB2387518A GB2387518A (en) 2003-10-15

Family

ID=9934792

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0208536A Ceased GB0208536D0 (en) 2002-04-13 2002-04-13 Copy protection and restricted viewing software programmes for MPEG1 encoded video data and MP3 audio subset of codec
GB0308380A Withdrawn GB2387518A (en) 2002-04-13 2003-04-11 Encryption and decryption of MPEG data streams

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0208536A Ceased GB0208536D0 (en) 2002-04-13 2002-04-13 Copy protection and restricted viewing software programmes for MPEG1 encoded video data and MP3 audio subset of codec

Country Status (1)

Country Link
GB (2) GB0208536D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2404467A (en) 2003-07-31 2005-02-02 Sony Uk Ltd Access control for digital content
US20060284977A1 (en) * 2005-06-21 2006-12-21 Nortel Networks Limited System and method for secure digital video
KR101670723B1 (en) 2011-01-04 2016-11-01 삼성전자주식회사 Apparatus and method for supporting variable length of transport packet in video and audio commnication system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI95756C (en) * 1994-03-21 1996-03-11 Nokia Technology Gmbh A method for encrypting and decrypting a bitstream containing digital information
US7065213B2 (en) * 2001-06-29 2006-06-20 Scientific-Atlanta, Inc. In a subscriber network receiving digital packets and transmitting digital packets below a predetermined maximum bit rate

Also Published As

Publication number Publication date
GB0208536D0 (en) 2002-05-22
GB2387518A (en) 2003-10-15

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)