NL188137B - SYSTEM FOR TRANSFERRING ENCRYPTED SIGNALS. - Google Patents

SYSTEM FOR TRANSFERRING ENCRYPTED SIGNALS.

Info

Publication number
NL188137B
NL188137B NLAANVRAGE7908569,A NL7908569A NL188137B NL 188137 B NL188137 B NL 188137B NL 7908569 A NL7908569 A NL 7908569A NL 188137 B NL188137 B NL 188137B
Authority
NL
Netherlands
Prior art keywords
encrypted signals
transferring encrypted
transferring
signals
encrypted
Prior art date
Application number
NLAANVRAGE7908569,A
Other languages
Dutch (nl)
Other versions
NL7908569A (en
NL188137C (en
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 NL7908569A publication Critical patent/NL7908569A/en
Publication of NL188137B publication Critical patent/NL188137B/en
Application granted granted Critical
Publication of NL188137C publication Critical patent/NL188137C/en

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
NLAANVRAGE7908569,A 1978-12-04 1979-11-26 SYSTEM FOR TRANSFERRING ENCRYPTED SIGNALS. NL188137C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96594078A 1978-12-04 1978-12-04
US96594078 1978-12-04

Publications (3)

Publication Number Publication Date
NL7908569A NL7908569A (en) 1980-06-06
NL188137B true NL188137B (en) 1991-11-01
NL188137C NL188137C (en) 1992-04-01

Family

ID=25510704

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7908569,A NL188137C (en) 1978-12-04 1979-11-26 SYSTEM FOR TRANSFERRING ENCRYPTED SIGNALS.

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)

Families Citing this family (17)

* 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
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
US4353088A (en) * 1980-05-14 1982-10-05 Oak Industries, Inc. Coding and decoding system for video and audio signals
US4621285A (en) * 1980-12-10 1986-11-04 Jerrold Division, General Instrument Corporation Protected television signal distribution system
CA1338158C (en) * 1982-07-15 1996-03-12 John D. Lowry Encryption and decryption (scrambling and unscrambling) of video signals
JPS59152786A (en) * 1983-02-18 1984-08-31 Sanyo Electric Co Ltd Scrambling system in catv broadcast
EP0119751B1 (en) * 1983-02-18 1987-09-30 Sanyo Electric Co., Ltd. Scrambling system of television signal
DE3479952D1 (en) * 1983-04-21 1989-11-02 Gen Instrument Corp 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
AU6013394A (en) * 1993-01-15 1994-08-15 Nauchno-Proizvodstvennaya Firma 'elektronika Ltd.' Method of relaying data via teevision 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

Also Published As

Publication number Publication date
AU5309779A (en) 1980-06-12
NL7908569A (en) 1980-06-06
JPS63131287U (en) 1988-08-26
DE2947943A1 (en) 1980-06-26
DE2947943C2 (en) 1985-04-18
GB2038137A (en) 1980-07-16
CA1150818A (en) 1983-07-26
IL58735A (en) 1982-01-31
FR2443778B1 (en) 1986-04-11
MX147755A (en) 1983-01-10
AU526049B2 (en) 1982-12-16
FR2443778A1 (en) 1980-07-04
GR82329B (en) 1984-12-13
CH661398A5 (en) 1987-07-15
IL58735A0 (en) 1980-02-29
BR7907803A (en) 1980-07-29
NL188137C (en) 1992-04-01
JPS5588481A (en) 1980-07-04
GB2038137B (en) 1983-04-13

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
SNR Assignments of patents or rights arising from examined patent applications

Owner name: OCI COMMUNICATIONS INC.

V4 Discontinued because of reaching the maximum lifetime of a patent

Free format text: 19991126