BE783622A - Dispositif de codage et de decodage pour tv-distribution. - Google Patents

Dispositif de codage et de decodage pour tv-distribution.

Info

Publication number
BE783622A
BE783622A BE783622A BE783622A BE783622A BE 783622 A BE783622 A BE 783622A BE 783622 A BE783622 A BE 783622A BE 783622 A BE783622 A BE 783622A BE 783622 A BE783622 A BE 783622A
Authority
BE
Belgium
Prior art keywords
coding
distribution
decoding device
decoding
Prior art date
Application number
BE783622A
Other languages
English (en)
Original Assignee
Optical Systems 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 Optical Systems Corp filed Critical Optical Systems Corp
Publication of BE783622A publication Critical patent/BE783622A/fr

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
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)
BE783622A 1971-02-08 1972-05-17 Dispositif de codage et de decodage pour tv-distribution. BE783622A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11339371A 1971-02-08 1971-02-08

Publications (1)

Publication Number Publication Date
BE783622A true BE783622A (fr) 1972-09-18

Family

ID=22349137

Family Applications (1)

Application Number Title Priority Date Filing Date
BE783622A BE783622A (fr) 1971-02-08 1972-05-17 Dispositif de codage et de decodage pour tv-distribution.

Country Status (8)

Country Link
US (1) US3729576A (fr)
JP (1) JPS5623353B1 (fr)
BE (1) BE783622A (fr)
CA (1) CA957764A (fr)
CH (1) CH538796A (fr)
DE (1) DE2165409C3 (fr)
FR (1) FR2185907A1 (fr)
GB (1) GB1381903A (fr)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4024575A (en) * 1974-03-15 1977-05-17 Oak Industries Inc. Catv sine wave coding system
CH575694A5 (fr) * 1974-03-15 1976-05-14 Oak Industries Inc
FR2385281A2 (fr) * 1974-03-15 1978-10-20 Oak Industries Inc Dispositif de decodage de signaux de television
DE2416086C2 (de) * 1974-04-01 1983-09-01 Blonder-Tongue Laboratories, Inc., Old Bridge, N.J. Verfahren zum Senden und Empfangen von verschlüsselten Fernsehsignalen
US3936593A (en) * 1974-08-05 1976-02-03 Gte Laboratories Incorporated Scrambler and decoder for a television signal
US3996418A (en) * 1974-08-05 1976-12-07 Gte Laboratories Incorporated Scrambler and decoder for secure television system
JPS51115718A (en) * 1975-02-24 1976-10-12 Pioneer Electronic Corp Bi-directional catv system
JPS5818832B2 (ja) * 1975-10-02 1983-04-14 パイオニア株式会社 映像信号伝送におけるスクランブル装置
JPS6057270B2 (ja) * 1976-04-23 1985-12-13 パイオニア株式会社 Ｃａｔｖシステムにおけるデイスクランブル装置
US4095258A (en) * 1976-10-15 1978-06-13 Blonder-Tongue Laboratories, Inc. Apparatus for decoding scrambled television and similar transmissions
US4145717A (en) * 1977-05-11 1979-03-20 Oak Industries Inc. Subscription TV audio carrier recovery system
JPS5539444A (en) * 1978-09-13 1980-03-19 Pioneer Electronic Corp Scramble/descramble system for catv broadcast
JPS57164682A (en) * 1981-04-02 1982-10-09 Alps Electric Co Ltd Data processing circuit
US4454543A (en) * 1981-11-06 1984-06-12 Oak Industries Inc. Dynamic video scrambling
US4466017A (en) * 1981-12-23 1984-08-14 Scientific-Atlanta, Inc. Sync suppression scrambling of television signals for subscription TV
US4489347A (en) * 1982-08-30 1984-12-18 Zenith Radio Corporation Sine-wave decoding technique
JPS59152786A (ja) * 1983-02-18 1984-08-31 Sanyo Electric Co Ltd Ｃａｔｖ放送におけるスクランブル方式
US4590519A (en) * 1983-05-04 1986-05-20 Regency Electronics, Inc. Television signal scrambling/descrambling system
US4636852A (en) * 1984-01-26 1987-01-13 Scientific-Atlanta, Inc. Scrambling and descrambling of television signals for subscription TV
US5091935A (en) * 1984-01-27 1992-02-25 Maast, Inc. Method and system for scrambling information signals
JPS63292790A (ja) * 1987-05-23 1988-11-30 Sony Corp デイスパ−サル信号除去回路
US5022078A (en) * 1990-03-08 1991-06-04 Andrew F. Tresness Television signal enhancement and scrambling system
US5671278A (en) * 1995-05-19 1997-09-23 Pires; H. George Video scrambling with variable function generator
US6081599A (en) * 1997-12-01 2000-06-27 Tresness Irrevocable Patent Trust Saw television scrambling system
US7116374B2 (en) 2003-08-26 2006-10-03 Koplar Interactive Systems International, L.L.C. Method and system for enhanced modulation of video signals
ES2362759B1 (es) * 2008-04-14 2012-06-06 Fundacio Privada Centre Tecnologic De Telecomunicacions De Catalunya Procedimiento y dispositivo de comunicaciones digitales para la recepción de datos usando simbolos qam.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3081376A (en) * 1959-03-23 1963-03-12 Zenith Radio Corp Subscription television system
US3184537A (en) * 1960-10-04 1965-05-18 Paramount Pictures Corp Subscription-television system employing suppression of synchronizing signals

Also Published As

Publication number Publication date
DE2165409C3 (de) 1973-12-06
DE2165409A1 (de) 1972-09-28
DE2165409B2 (de) 1973-05-24
FR2185907A1 (fr) 1974-01-04
CA957764A (en) 1974-11-12
CH538796A (de) 1973-08-15
JPS5623353B1 (fr) 1981-05-30
GB1381903A (en) 1975-01-29
US3729576A (en) 1973-04-24

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