GB1343862A - Electronic communication apparatus employing encripted signal distribution - Google Patents

Electronic communication apparatus employing encripted signal distribution

Info

Publication number
GB1343862A
GB1343862A GB607472A GB607472A GB1343862A GB 1343862 A GB1343862 A GB 1343862A GB 607472 A GB607472 A GB 607472A GB 607472 A GB607472 A GB 607472A GB 1343862 A GB1343862 A GB 1343862A
Authority
GB
United Kingdom
Prior art keywords
signal
pilot
channel
receiver
alternately
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
Application number
GB607472A
Other languages
English (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.)
WARENR TVC CORP
Original Assignee
WARENR TVC CORP
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 WARENR TVC CORP filed Critical WARENR TVC CORP
Publication of GB1343862A publication Critical patent/GB1343862A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Details Of Television Systems (AREA)
GB607472A 1971-03-10 1972-02-09 Electronic communication apparatus employing encripted signal distribution Expired GB1343862A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12266071A 1971-03-10 1971-03-10

Publications (1)

Publication Number Publication Date
GB1343862A true GB1343862A (en) 1974-01-16

Family

ID=22404012

Family Applications (1)

Application Number Title Priority Date Filing Date
GB607472A Expired GB1343862A (en) 1971-03-10 1972-02-09 Electronic communication apparatus employing encripted signal distribution

Country Status (5)

Country Link
US (1) US3733431A (https=)
CA (1) CA944059A (https=)
DE (1) DE2209097A1 (https=)
FR (1) FR2128760A1 (https=)
GB (1) GB1343862A (https=)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789131A (en) * 1972-08-03 1974-01-29 Oak Industries Inc Selective coding system for subscription television
US3885089A (en) * 1973-02-16 1975-05-20 Hughes Aircraft Co Television scrambling system
US3914534A (en) * 1973-10-29 1975-10-21 Magnavox Co Methods and apparatus for scrambling and unscrambling premium television channels
US4272791A (en) * 1979-03-26 1981-06-09 Rifken Jerome C Method and apparatus for video recording
US4965825A (en) 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
USRE47642E1 (en) 1981-11-03 2019-10-08 Personalized Media Communications LLC Signal processing apparatus and methods
US7831204B1 (en) 1981-11-03 2010-11-09 Personalized Media Communications, Llc Signal processing apparatus and methods
USRE33189E (en) * 1981-11-19 1990-03-27 Communications Satellite Corporation Security system for SSTV encryption
FR2573266A1 (fr) * 1984-11-09 1986-05-16 Cedelle Paul Dispositif de decodage d'emissions de television codees, destine notamment a une installation d'antenne collective
FR2721160B1 (fr) * 1994-06-13 1996-08-14 Telediffusion Fse Procédé d'embrouillage et de désembrouillage de programmes de télévision multiplexée et dispositifs correspondants.
WO1996008111A1 (en) * 1994-09-07 1996-03-14 Yee Kong Ng Apparatus and methods for scrambling and unscrambling video signals
US5512963A (en) * 1995-01-05 1996-04-30 Mankovitz; Roy J. Apparatus and methods for providing combining multiple video sources
US5710815A (en) * 1995-06-07 1998-01-20 Vtech Communications, Ltd. Encoder apparatus and decoder apparatus for a television signal having embedded viewer access control data
US6370156B2 (en) * 1997-01-31 2002-04-09 Alcatel Modulation/demodulation of a pilot carrier, means and method to perform the modulation/demodulation
DE20007619U1 (de) * 2000-04-27 2001-08-30 Krauss-Maffei Wegmann GmbH & Co.KG, 34127 Kassel Einrichtung zur Reduktion der Antennenanzahl an einem Kampffahrzeug
US10389453B2 (en) 2009-12-15 2019-08-20 Interdigital Madison Patent Holdings Multiplexed RFAGC for frequency diversity receivers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106604A (en) * 1955-01-12 1963-10-08 Skiatron Elect & Tele Multiple code subscription television system
US3054857A (en) * 1955-04-18 1962-09-18 Paramount Pictures Corp Secrecy system
US3025350A (en) * 1957-06-05 1962-03-13 Herbert G Lindner Security communication system
US3466385A (en) * 1967-06-13 1969-09-09 Zenith Radio Corp Correlation testing arrangement for a subscription television receiver

Also Published As

Publication number Publication date
DE2209097A1 (de) 1972-09-14
CA944059A (en) 1974-03-19
US3733431A (en) 1973-05-15
FR2128760A1 (https=) 1972-10-20

Similar Documents

Publication Publication Date Title
GB1343862A (en) Electronic communication apparatus employing encripted signal distribution
US4035838A (en) Cable distribution system for wide-band message signals
GB877443A (en) Frequency-shift-keyed system having a minimum frequency shift
GB958763A (en) Radio pulse communication systems
GB2063026A (en) Wired broadcasting system
JPS5819087A (ja) Ｃａｔｖシステムにおけるデ−タ
GB1049450A (en) System of videophonic telecommunication
GB1422375A (en) Communications system azide-containing benzo
US4396946A (en) Transmission of data with a video signal
GB670442A (en) Improvements in television transmitters
US3826863A (en) Subscription television system using audio and video carrier reversal
US4414663A (en) Time division multiplex system having transmitted pulses in time channels distributed over and co-transmitted with a frame clock signal component
GB1435146A (en) Terminal equipment for a synchronized communication system
US2671130A (en) Combined television and sound system
US2678348A (en) Color television interlacing system
US3518376A (en) Low frequency television system
US3420951A (en) Television transmission delay compensation apparatus
US3351858A (en) Satellite communication systems
US3541265A (en) Receiver for a time multiplexing transmission system
US2566764A (en) Circuit for shifting alternate fields of television rasters
GB735541A (en) Improvements in coding arrangement for a television transmitter or receiver
US4398214A (en) Wired television broadcasting system
US2889399A (en) Single frame facsimile system
US2906815A (en) Television relay and like apparatus
GB595138A (en) Improvements in television systems

Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed