FI864640A - Scramblings- och datatransmissionssystem foer en televisionssignal. - Google Patents

Scramblings- och datatransmissionssystem foer en televisionssignal. Download PDF

Info

Publication number
FI864640A
FI864640A FI864640A FI864640A FI864640A FI 864640 A FI864640 A FI 864640A FI 864640 A FI864640 A FI 864640A FI 864640 A FI864640 A FI 864640A FI 864640 A FI864640 A FI 864640A
Authority
FI
Finland
Prior art keywords
filter
carrier wave
filters
signal
response
Prior art date
Application number
FI864640A
Other languages
English (en)
Other versions
FI864640A0 (fi
FI84126C (fi
FI84126B (fi
Inventor
Richard W Citta
Dennis M Mutzabaugh
Gary J Sgrignoli
Original Assignee
Zenith Electronics 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
Priority claimed from US06/711,947 external-priority patent/US4706283A/en
Priority claimed from US06/712,949 external-priority patent/US4706284A/en
Application filed by Zenith Electronics Corp filed Critical Zenith Electronics Corp
Publication of FI864640A0 publication Critical patent/FI864640A0/fi
Publication of FI864640A publication Critical patent/FI864640A/fi
Application granted granted Critical
Publication of FI84126B publication Critical patent/FI84126B/fi
Publication of FI84126C publication Critical patent/FI84126C/fi

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)
  • Television Systems (AREA)
  • Television Receiver Circuits (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
FI864640A 1985-03-15 1986-11-14 Scramblings- och datatransmissionssystem foer en televisionssignal. FI84126C (fi)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US06/711,947 US4706283A (en) 1985-03-15 1985-03-15 Television signal scrambling system
US06/712,949 US4706284A (en) 1985-03-15 1985-03-15 Television signal data transmission system
US71194785 1985-03-15
US71294985 1985-03-15
US8600548 1986-03-14
PCT/US1986/000548 WO1986005647A1 (en) 1985-03-15 1986-03-14 Television signal scrambling and data transmission system

Publications (4)

Publication Number Publication Date
FI864640A0 FI864640A0 (fi) 1986-11-14
FI864640A true FI864640A (fi) 1986-11-14
FI84126B FI84126B (fi) 1991-06-28
FI84126C FI84126C (fi) 1991-10-10

Family

ID=27108735

Family Applications (1)

Application Number Title Priority Date Filing Date
FI864640A FI84126C (fi) 1985-03-15 1986-11-14 Scramblings- och datatransmissionssystem foer en televisionssignal.

Country Status (4)

Country Link
EP (1) EP0215946B1 (fi)
DE (1) DE3685621T2 (fi)
FI (1) FI84126C (fi)
WO (1) WO1986005647A1 (fi)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2038913B1 (es) * 1991-10-02 1996-05-16 Iglesias Angel Sa Sistema de codificacion simultanea de varias señales de television y decodificacion de las mismas en radiofrecuencia.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2983781A (en) * 1955-01-12 1961-05-09 Skiatron Elect & Tele Television
US4333108A (en) * 1980-03-10 1982-06-01 Ampex Corporation Apparatus and method for transmitting a pulse width modulated audio signal on a video signal
US4467353A (en) * 1982-03-25 1984-08-21 Zenith Electronics Corporation Television signal scrambling system and method

Also Published As

Publication number Publication date
FI864640A0 (fi) 1986-11-14
DE3685621T2 (de) 1993-01-28
EP0215946A1 (en) 1987-04-01
FI84126C (fi) 1991-10-10
FI84126B (fi) 1991-06-28
EP0215946B1 (en) 1992-06-10
DE3685621D1 (de) 1992-07-16
WO1986005647A1 (en) 1986-09-25

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: ZENITH ELECTRONICS CORPORATION