AU5309779A - Subscription television coding/decoding system - Google Patents

Subscription television coding/decoding system

Info

Publication number
AU5309779A
AU5309779A AU53097/79A AU5309779A AU5309779A AU 5309779 A AU5309779 A AU 5309779A AU 53097/79 A AU53097/79 A AU 53097/79A AU 5309779 A AU5309779 A AU 5309779A AU 5309779 A AU5309779 A AU 5309779A
Authority
AU
Australia
Prior art keywords
decoding system
subscription television
television coding
coding
subscription
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
AU53097/79A
Other versions
AU526049B2 (en
Inventor
Pieter J. Fondse
Cornelis A. De Jong
Tom De Koningh
Johannes Seltenrijch
Pieter Den Toonder
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.)
OCI Communcations Inc
Original Assignee
Oak Industries Inc
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 Oak Industries Inc filed Critical Oak Industries Inc
Publication of AU5309779A publication Critical patent/AU5309779A/en
Application granted granted Critical
Publication of AU526049B2 publication Critical patent/AU526049B2/en
Assigned to OCI COMMUNICATIONS INC reassignment OCI COMMUNICATIONS INC Alteration of Name(s) in Register under S187 Assignors: OAK INDUSTRIES INC.
Anticipated expiration legal-status Critical
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
    • H04N7/085—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only the inserted signal being digital
    • 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
AU53097/79A 1978-12-04 1979-11-22 Subscription television coding/decoding system Expired AU526049B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96594078A 1978-12-04 1978-12-04
US965940 1978-12-04

Publications (2)

Publication Number Publication Date
AU5309779A true AU5309779A (en) 1980-06-12
AU526049B2 AU526049B2 (en) 1982-12-16

Family

ID=25510704

Family Applications (1)

Application Number Title Priority Date Filing Date
AU53097/79A Expired AU526049B2 (en) 1978-12-04 1979-11-22 Subscription television coding/decoding system

Country Status (12)

Country Link
JP (2) JPS5588481A (en)
AU (1) AU526049B2 (en)
BR (1) BR7907803A (en)
CA (1) CA1150818A (en)
CH (1) CH661398A5 (en)
DE (1) DE2947943C2 (en)
FR (1) FR2443778B1 (en)
GB (1) GB2038137B (en)
GR (1) GR82329B (en)
IL (1) IL58735A (en)
MX (1) MX147755A (en)
NL (1) NL188137C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU567102B2 (en) * 1982-07-15 1987-11-12 Scientific-Atlanta, Inc. Encrypting a television signal with variable line blanking durations

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4336553A (en) * 1980-05-14 1982-06-22 Oak Industries Method of coding audio and video signals
US4353088A (en) * 1980-05-14 1982-10-05 Oak Industries, Inc. Coding and decoding system for video and audio signals
US4340906A (en) * 1980-05-14 1982-07-20 Oak Industries Inc. Video signal coding by video signal polarity reversal on the basis of brightness level comparison
US4621285A (en) * 1980-12-10 1986-11-04 Jerrold Division, General Instrument Corporation Protected television signal distribution system
DE3466636D1 (en) * 1983-02-18 1987-11-05 Sanyo Electric Co Scrambling system of television signal
JPS59152786A (en) * 1983-02-18 1984-08-31 Sanyo Electric Co Ltd Scrambling system in catv broadcast
EP0123505B1 (en) * 1983-04-21 1989-09-27 General Instrument Corporation Scrambling system for television video signal
US4594609A (en) * 1983-06-30 1986-06-10 Viewstar Inc. Scrambling system for television video signal
EP0133190A1 (en) * 1983-08-01 1985-02-20 Payview Limited Encoding and decoding of a television signal
US4745476A (en) * 1984-02-15 1988-05-17 Matsushita Electric Industrial Co., Ltd. Television sound signal processing apparatus
DE3432653C1 (en) * 1984-09-05 1986-01-16 Westdeutscher Rundfunk, Anstalt des öffentlichen Rechts, 5000 Köln Method for transmitting television programmes to authorised subscribers
FR2572612B1 (en) * 1984-10-31 1986-12-26 Cgv Comp Gen Videotech INTERFACE BETWEEN VIDEO DECODER AND TELEVISION RECEIVER
US4815129A (en) * 1985-01-02 1989-03-21 General Instrument Corp. Video encryption system
DE3638554A1 (en) * 1986-11-12 1988-05-26 Siemens Ag Method and arrangement for coding digital video signals
GB2216359B (en) * 1988-03-18 1992-05-20 Marconi Gec Ltd Synchronisation
WO1994017622A2 (en) * 1993-01-15 1994-08-04 Nauchno-Proizvodstvennaya Firma 'elektronika Ltd.' Method of relaying data via television channels and a system for carrying out same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184537A (en) * 1960-10-04 1965-05-18 Paramount Pictures Corp Subscription-television system employing suppression of synchronizing signals
FR1287695A (en) * 1960-10-04 1962-03-16 Paramount Pictures Corp Pay TV systems
US3485941A (en) * 1965-04-12 1969-12-23 R & R Research Ltd Television system with modified sync signals and auxiliary timing information
NL7016628A (en) * 1970-11-13 1972-05-16
JPS4924530A (en) * 1972-06-30 1974-03-05
JPS5236593B2 (en) * 1973-08-09 1977-09-16
US3919462A (en) * 1973-08-15 1975-11-11 System Dev Corp Method and apparatus for scrambling and unscrambling communication signals
JPS5120623A (en) * 1974-08-14 1976-02-19 Matsushita Electric Ind Co Ltd SHINGODENSO HOSHIKI
JPS5169927A (en) * 1974-12-13 1976-06-17 Fujitsu Ltd TEREBIJON FUKUGOEIZO SHINGOHOSHIKI
FR2313825A1 (en) * 1975-06-06 1976-12-31 Telediffusion Fse DATA DISSEMINATION SYSTEM
US4095258A (en) * 1976-10-15 1978-06-13 Blonder-Tongue Laboratories, Inc. Apparatus for decoding scrambled television and similar transmissions
JPS53113427A (en) * 1977-03-15 1978-10-03 Matsushita Electric Ind Co Ltd Sampling clock reproducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU567102B2 (en) * 1982-07-15 1987-11-12 Scientific-Atlanta, Inc. Encrypting a television signal with variable line blanking durations

Also Published As

Publication number Publication date
FR2443778B1 (en) 1986-04-11
GB2038137B (en) 1983-04-13
NL188137B (en) 1991-11-01
NL188137C (en) 1992-04-01
NL7908569A (en) 1980-06-06
GB2038137A (en) 1980-07-16
IL58735A (en) 1982-01-31
JPS5588481A (en) 1980-07-04
CH661398A5 (en) 1987-07-15
IL58735A0 (en) 1980-02-29
DE2947943C2 (en) 1985-04-18
GR82329B (en) 1984-12-13
FR2443778A1 (en) 1980-07-04
AU526049B2 (en) 1982-12-16
CA1150818A (en) 1983-07-26
DE2947943A1 (en) 1980-06-26
BR7907803A (en) 1980-07-29
MX147755A (en) 1983-01-10
JPS63131287U (en) 1988-08-26

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired