FR2482814B1 - Procede et dispositif pour coder et decoder des signaux video par inversion repetitive de la polarite de ces signaux - Google Patents

Procede et dispositif pour coder et decoder des signaux video par inversion repetitive de la polarite de ces signaux

Info

Publication number
FR2482814B1
FR2482814B1 FR8109503A FR8109503A FR2482814B1 FR 2482814 B1 FR2482814 B1 FR 2482814B1 FR 8109503 A FR8109503 A FR 8109503A FR 8109503 A FR8109503 A FR 8109503A FR 2482814 B1 FR2482814 B1 FR 2482814B1
Authority
FR
France
Prior art keywords
signals
polarity
encoding
decoding video
video signals
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
FR8109503A
Other languages
English (en)
Other versions
FR2482814A1 (fr
Inventor
Pieter Den Toonder
Pieter J Fondse
Johannes C Seltenrijch
Graham S Stubbs
Howard F Jirka
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.)
Oak Industries 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 FR2482814A1 publication Critical patent/FR2482814A1/fr
Application granted granted Critical
Publication of FR2482814B1 publication Critical patent/FR2482814B1/fr
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
FR8109503A 1980-05-14 1981-05-13 Procede et dispositif pour coder et decoder des signaux video par inversion repetitive de la polarite de ces signaux Expired FR2482814B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/149,708 US4340906A (en) 1980-05-14 1980-05-14 Video signal coding by video signal polarity reversal on the basis of brightness level comparison

Publications (2)

Publication Number Publication Date
FR2482814A1 FR2482814A1 (fr) 1981-11-20
FR2482814B1 true FR2482814B1 (fr) 1985-12-06

Family

ID=22531464

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8109503A Expired FR2482814B1 (fr) 1980-05-14 1981-05-13 Procede et dispositif pour coder et decoder des signaux video par inversion repetitive de la polarite de ces signaux

Country Status (13)

Country Link
US (1) US4340906A (fr)
JP (1) JPS5717287A (fr)
AU (1) AU528948B2 (fr)
BR (1) BR8102969A (fr)
CA (1) CA1164991A (fr)
CH (1) CH655418B (fr)
DE (1) DE3119013C2 (fr)
FR (1) FR2482814B1 (fr)
GB (1) GB2078052B (fr)
GR (1) GR74542B (fr)
IL (1) IL62737A (fr)
MX (1) MX150239A (fr)
NL (1) NL189332C (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4965825A (en) 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
US7831204B1 (en) 1981-11-03 2010-11-09 Personalized Media Communications, Llc Signal processing apparatus and methods
USRE47642E1 (en) 1981-11-03 2019-10-08 Personalized Media Communications LLC Signal processing apparatus and methods
US4454543A (en) * 1981-11-06 1984-06-12 Oak Industries Inc. Dynamic video scrambling
US4447828A (en) * 1982-02-25 1984-05-08 Oak Industries Inc. Phase change dynamic scrambling
JPS58198934A (ja) * 1982-05-17 1983-11-19 Sony Corp 秘話装置
JPS59154887A (ja) * 1983-02-23 1984-09-03 Sony Corp 映像信号受信装置
JPS59157858A (ja) * 1983-02-28 1984-09-07 Sony Corp 記録装置
JPS59165585A (ja) * 1983-03-09 1984-09-18 Sony Corp テレビジヨン信号受信装置
JPS59174080A (ja) * 1983-03-24 1984-10-02 Sony Corp テレビジヨン信号受信装置
US4599648A (en) * 1983-05-24 1986-07-08 Nec Corporation Video signal transmission systems
JPS6016083A (ja) * 1983-07-07 1985-01-26 Sony Corp テレビジヨン信号伝送システム
CA1213972A (fr) * 1983-07-13 1986-11-12 Takashi Okada Dispositif de brouillage de signaux de television
DE3432653C1 (de) * 1984-09-05 1986-01-16 Westdeutscher Rundfunk, Anstalt des öffentlichen Rechts, 5000 Köln Verfahren zum Übertragen von Fersehprogrammen an berechtigte Teilnehmer
JPS6276880A (ja) * 1985-09-30 1987-04-08 Toshiba Corp 映像スクランブル方式
JPS6276878A (ja) * 1985-09-30 1987-04-08 Toshiba Corp 映像スクランブル信号処理装置
US4759061A (en) * 1985-11-01 1988-07-19 Zenith Electronics Corporation Technique for toggling coding mode in a television signal encoder
DE3702089C1 (de) * 1987-01-24 1988-06-30 Kernforschungsanlage Juelich Wirbelschichtofen zur Muellverbrennung
US4914694A (en) * 1988-04-11 1990-04-03 Eidak Corporation Modifying a television signal to inhibit recording/reproduction
US5153723A (en) * 1991-07-24 1992-10-06 Zenith Electronics Corporation HDTV audio subsystem with timing characteristics compatible with video subsystem
US5321748A (en) * 1992-07-02 1994-06-14 General Instrument Corporation, Jerrold Communications Method and apparatus for television signal scrambling using block shuffling
US5606612A (en) * 1994-07-25 1997-02-25 General Instrument Corporation, Jerrold Communications Division Method and apparatus for television signal scrambling using a line expansion technique
US5617475A (en) * 1994-11-18 1997-04-01 General Instrument Corporation, G.I. Communications Division Scrambling and descrambling of video signals using horizontal line combinations

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510046A (en) * 1947-04-18 1950-05-30 Zenith Radio Corp Radio-wire signaling system
US2705740A (en) * 1949-12-14 1955-04-05 Zenith Radio Corp Subscription type signalling system
GB749627A (en) 1953-02-27 1956-05-30 Communications Patents Ltd Improvements in and relating to television systems
GB841627A (en) 1956-12-20 1960-07-20 Rank Organisation Ltd Improvements in or relating to television systems
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
GB1028025A (en) * 1962-08-30 1966-05-04 R & R Res Ltd Improvements in or relating to television systems
US3485941A (en) * 1965-04-12 1969-12-23 R & R Research Ltd Television system with modified sync signals and auxiliary timing information
US3530232A (en) * 1966-06-17 1970-09-22 Intern Telemeter Corp Subscription television system
US3919462A (en) * 1973-08-15 1975-11-11 System Dev Corp Method and apparatus for scrambling and unscrambling communication signals
DE2529728A1 (de) * 1973-10-08 1977-01-20 Standard Elektrik Lorenz Ag Fernsehsystem mit integrierter tonuebertragung
US4022972A (en) * 1975-05-13 1977-05-10 Teleglobe Pay Tv System Inc. Transient suppression and grey level coincidence in a subscription television system
US4081831A (en) * 1976-04-08 1978-03-28 Twin County Trans-Video, Inc. High security subscription television system employing real time control of subscriber's program reception
US4081832A (en) * 1976-06-08 1978-03-28 Pay Television Corporation Pay television system, method and apparatus
US4095258A (en) * 1976-10-15 1978-06-13 Blonder-Tongue Laboratories, Inc. Apparatus for decoding scrambled television and similar transmissions
GB1557741A (en) * 1977-04-28 1979-12-12 Teleglobe Pay Tv System Inc Subscription television system
US4112464A (en) * 1977-05-11 1978-09-05 Oak Industries Inc. Subscription TV decoder logic system
US4145717A (en) * 1977-05-11 1979-03-20 Oak Industries Inc. Subscription TV audio carrier recovery system
US4215366A (en) * 1977-10-19 1980-07-29 Feature Film Services Subscriber-limited reception television broadcast security encoder-decoder system
IL58735A (en) * 1978-12-04 1982-01-31 Oak Industries Inc Subscription television coding system
JPS55121782A (en) * 1979-03-12 1980-09-19 Clarion Co Ltd Video code process system for television

Also Published As

Publication number Publication date
NL189332B (nl) 1992-10-01
DE3119013A1 (de) 1982-02-25
MX150239A (es) 1984-04-04
NL189332C (nl) 1993-03-01
CA1164991A (fr) 1984-04-03
BR8102969A (pt) 1982-02-02
GB2078052A (en) 1981-12-23
GB2078052B (en) 1984-10-17
JPS5717287A (en) 1982-01-28
AU528948B2 (en) 1983-05-19
NL8102350A (nl) 1981-12-01
GR74542B (fr) 1984-06-29
FR2482814A1 (fr) 1981-11-20
CH655418B (fr) 1986-04-15
JPH027555B2 (fr) 1990-02-19
DE3119013C2 (de) 1984-01-05
IL62737A0 (en) 1981-06-29
AU7056081A (en) 1981-12-03
US4340906A (en) 1982-07-20
IL62737A (en) 1983-11-30

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Legal Events

Date Code Title Description
TP Transmission of property