OA10754A - Selective interdiction of television channels - Google Patents

Selective interdiction of television channels Download PDF

Info

Publication number
OA10754A
OA10754A OA9800003A OA9800003A OA10754A OA 10754 A OA10754 A OA 10754A OA 9800003 A OA9800003 A OA 9800003A OA 9800003 A OA9800003 A OA 9800003A OA 10754 A OA10754 A OA 10754A
Authority
OA
OAPI
Prior art keywords
signal
signais
channel
headend
common
Prior art date
Application number
OA9800003A
Other languages
English (en)
Inventor
Pablo Miliani
David L Petree
Yat Sen Lie
Original Assignee
California Amplifier
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 PCT/US1995/008721 external-priority patent/WO1996002111A1/en
Application filed by California Amplifier filed Critical California Amplifier
Publication of OA10754A publication Critical patent/OA10754A/en

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/162—Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing
    • H04N7/165—Centralised control of user terminal ; Registering at central
    • 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
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
OA9800003A 1995-07-11 1998-01-09 Selective interdiction of television channels OA10754A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1995/008721 WO1996002111A1 (en) 1994-07-11 1995-07-11 Encryption/decryption process and apparatus for a multichannel television system

Publications (1)

Publication Number Publication Date
OA10754A true OA10754A (en) 2002-12-11

Family

ID=22249456

Family Applications (1)

Application Number Title Priority Date Filing Date
OA9800003A OA10754A (en) 1995-07-11 1998-01-09 Selective interdiction of television channels

Country Status (6)

Country Link
EP (1) EP0806116A4 (de)
AP (1) AP896A (de)
AU (1) AU4645096A (de)
BR (1) BR9510615A (de)
OA (1) OA10754A (de)
WO (1) WO1997003523A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5125100A (en) * 1990-07-02 1992-06-23 Katznelson Ron D Optimal signal synthesis for distortion cancelling multicarrier systems
US5319709A (en) * 1991-06-13 1994-06-07 Scientific-Atlanta, Inc. System for broadband descrambling of sync suppressed television signals
KR100269004B1 (ko) * 1992-01-08 2000-10-16 카츠넬슨 론 디. 다중채널 텔레비젼 신호 스크램블링과 디스크램블링 시스템 및 방법
WO1993026126A1 (en) * 1992-06-10 1993-12-23 Scientific-Atlanta, Inc. Interdiction method and apparatus with frequency change inhibit function
US5278908A (en) * 1992-06-10 1994-01-11 Scientific-Atlanta, Inc. Interdiction method and apparatus with programmable jamming effectiveness

Also Published As

Publication number Publication date
BR9510615A (pt) 1999-04-27
WO1997003523A1 (en) 1997-01-30
AP896A (en) 2000-11-17
AU4645096A (en) 1997-02-10
EP0806116A4 (de) 2000-06-28
EP0806116A1 (de) 1997-11-12

Similar Documents

Publication Publication Date Title
US5488659A (en) Encryption/decryption process and apparatus for a multichannel television system
CA1317368C (en) Direct broadcast satellite signal transmission system
EP0284799B1 (de) Vorrichtung und Verfahren zur Herstellung eines digitalen Audiosignals auf dem Tonträger eines Standardfernsehsignals
CA1123949A (en) High security subscription television system employing real time control of subscriber's program reception
US4398216A (en) Multiple signal transmission method and system, particularly for television
US4410911A (en) Multiple signal transmission method and system, particularly for television
US4599647A (en) Receiver with interface for interaction with controller-decoder
US5497187A (en) In-band/out-of-band data transmission method and apparatus for a television system
US5230019A (en) Key signal conversion device for CATV system
US5682426A (en) Subscriber site method and apparatus for decoding and selective interdiction of television channels
CA2157670A1 (en) Apparatus providing dynamic virtual service selection in a multi-service communications system
JP2726644B2 (ja) テレビジョン受信装置
GB2038137A (en) Coding and decoding of TV signals
CA1261961A (en) Pay tv scrambling by audio encryption
US4034402A (en) Video scrambling system
US4779129A (en) FM simultaneous broadcast system for CATV
CA1292056C (en) Video signal scrambling system
JPH027236B2 (de)
US4962529A (en) Scrambling method for TV picture
US5410601A (en) Video scramble system and equipment
US7146008B1 (en) Conditional access television sound
OA10754A (en) Selective interdiction of television channels
US3769448A (en) Audio encoding/decoding system for catv
EP0133190A1 (de) Kodierung und Dekodierung eines Fernsehsignals
EP0717907B1 (de) Ver- und entschlüsselungsverfahren und -gerät für mehrkanalfernsehsystem