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GB2253120B - A linked switched video telephone system - Google Patents

A linked switched video telephone system

Info

Publication number
GB2253120B
GB2253120B GB9110406A GB9110406A GB2253120B GB 2253120 B GB2253120 B GB 2253120B GB 9110406 A GB9110406 A GB 9110406A GB 9110406 A GB9110406 A GB 9110406A GB 2253120 B GB2253120 B GB 2253120B
Authority
GB
United Kingdom
Prior art keywords
linked
telephone system
video telephone
switched video
switched
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.)
Expired - Fee Related
Application number
GB9110406A
Other versions
GB9110406D0 (en
GB2253120A (en
Inventor
Terence John Edward Mechan
Communications Olympic
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9110406D0 publication Critical patent/GB9110406D0/en
Publication of GB2253120A publication Critical patent/GB2253120A/en
Application granted granted Critical
Publication of GB2253120B publication Critical patent/GB2253120B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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]
    • H04N21/20—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
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/36—Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks
    • 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
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB9110406A 1991-02-12 1991-04-25 A linked switched video telephone system Expired - Fee Related GB2253120B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919102918A GB9102918D0 (en) 1991-02-12 1991-02-12 Linked switched video telephone system

Publications (3)

Publication Number Publication Date
GB9110406D0 GB9110406D0 (en) 1991-07-03
GB2253120A GB2253120A (en) 1992-08-26
GB2253120B true GB2253120B (en) 1994-06-08

Family

ID=10689879

Family Applications (2)

Application Number Title Priority Date Filing Date
GB919102918A Pending GB9102918D0 (en) 1991-02-12 1991-02-12 Linked switched video telephone system
GB9110406A Expired - Fee Related GB2253120B (en) 1991-02-12 1991-04-25 A linked switched video telephone system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB919102918A Pending GB9102918D0 (en) 1991-02-12 1991-02-12 Linked switched video telephone system

Country Status (1)

Country Link
GB (2) GB9102918D0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267625B (en) * 1992-05-20 1996-08-21 Northern Telecom Ltd Video services
GB2294377B (en) * 1993-06-18 1998-01-28 Amulet Electronics Ltd Video-telephony communication apparatus
FR2709628B3 (en) * 1993-09-02 1995-07-21 Sagem Local videophone network connected to a digital network and videophone of such a network.
GB2302775B (en) * 1995-06-29 1997-07-23 Terence John Edward Mechan A PABX controlled video-on-demand system
US5903372A (en) * 1997-02-10 1999-05-11 Alcatel Network Systems, Inc. Means for remote addition of video services to subscribers

Also Published As

Publication number Publication date
GB9110406D0 (en) 1991-07-03
GB2253120A (en) 1992-08-26
GB9102918D0 (en) 1991-03-27

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Legal Events

Date Code Title Description
727 Application made for amendment of specification (sect. 27/1977)
727J Application withdrawn (sect. 27/1977)
727J Application withdrawn (sect. 27/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000425