SE9001672D0 - PAYMENT TV SYSTEM REQUEST - Google Patents

PAYMENT TV SYSTEM REQUEST

Info

Publication number
SE9001672D0
SE9001672D0 SE9001672A SE9001672A SE9001672D0 SE 9001672 D0 SE9001672 D0 SE 9001672D0 SE 9001672 A SE9001672 A SE 9001672A SE 9001672 A SE9001672 A SE 9001672A SE 9001672 D0 SE9001672 D0 SE 9001672D0
Authority
SE
Sweden
Prior art keywords
obfuscation
signal
signals
pass
channels
Prior art date
Application number
SE9001672A
Other languages
Swedish (sv)
Other versions
SE9001672L (en
Inventor
R Soederqvist
Original Assignee
Spacenet Ab
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 Spacenet Ab filed Critical Spacenet Ab
Priority to SE9001672A priority Critical patent/SE9001672L/en
Publication of SE9001672D0 publication Critical patent/SE9001672D0/en
Priority to AU78904/91A priority patent/AU7890491A/en
Priority to PCT/SE1991/000311 priority patent/WO1991017630A1/en
Publication of SE9001672L publication Critical patent/SE9001672L/en

Links

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)
  • Small-Scale Networks (AREA)

Abstract

An improved pay-TV-system, comprising a centrally located obfuscation signal generator, adapted to periodically pass to at least some TV-channels obfuscation signals, and control and communication device (12) to set which ones of the channels at the respective subscriber where unobfuscated receiving is authorized, comprising a centrally located coding device (K) to which a modulated TV-signal from the cable net (10) is passed, and which, within the band width of the TV-signal, via an obfuscation signal generator (13) passes to the modulated TV-signal data for the respective obfuscation signal, such as time, duration and frequency of the obfuscation signal, and, for each subscriber, a decoder (AK), comprising a sync unit and a filter, and adapted to receive obfuscation coded signals from the coding device, and, in dependence on control signals from the control and communication devices (12) on one hand, and the function of the sync unit on the other hand, to filtrate off the obfuscation signals on the channels where normal receiving is authorized in order to pass to an output terminal only decoded information signals. The system includes a logic circuit which is adapted to detect whether or not an obfuscation lies within the filter, and a device adapted to adjust the filter towards the obfuscation. Further, at least some of the decoding units (AK) are provided with a by-pass line, preferably including an amplifier (F), to provide a by-pass function.
SE9001672A 1990-05-09 1990-05-09 DEVICE ON PAYMENT-TV SYSTEM SE9001672L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9001672A SE9001672L (en) 1990-05-09 1990-05-09 DEVICE ON PAYMENT-TV SYSTEM
AU78904/91A AU7890491A (en) 1990-05-09 1991-04-30 An improved pay-tv-system
PCT/SE1991/000311 WO1991017630A1 (en) 1990-05-09 1991-04-30 An improved pay-tv-system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9001672A SE9001672L (en) 1990-05-09 1990-05-09 DEVICE ON PAYMENT-TV SYSTEM

Publications (2)

Publication Number Publication Date
SE9001672D0 true SE9001672D0 (en) 1990-05-09
SE9001672L SE9001672L (en) 1992-01-27

Family

ID=20379425

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9001672A SE9001672L (en) 1990-05-09 1990-05-09 DEVICE ON PAYMENT-TV SYSTEM

Country Status (3)

Country Link
AU (1) AU7890491A (en)
SE (1) SE9001672L (en)
WO (1) WO1991017630A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896262A (en) * 1974-03-21 1975-07-22 Hughes Aircraft Co Subscription television jamming system
US4841569A (en) * 1987-12-30 1989-06-20 General Instrument Corporation Secure video distribution system
SE8803814A0 (en) * 1988-10-25 1990-04-26 Spacenet Ab Device for pay-TV systems

Also Published As

Publication number Publication date
SE9001672L (en) 1992-01-27
WO1991017630A1 (en) 1991-11-14
AU7890491A (en) 1991-11-27

Similar Documents

Publication Publication Date Title
IL107624A (en) Method and apparatus for encoding/decoding broadcast or recorded segments and monitoring audience exposure thereto
BR9201106A (en) SECURITY SYSTEM FOR TRANSMISSION OF A SIGNAL, METHODO TO REPLACE A SUBSTITUABLE SECURITY MODULE, DECODER TO RECEIVE AND SEPARATE A SIGNAL, SUBSTITUTABLE SECURITY MODULE TO DECODIFY A SIGNAL, SIGNATURE, APPLY, SUBSCRIBER INFORMATION, DECODER TO DECODE A KEY AND COMPOSITE DATA PACKAGE
ES2194002T3 (en) RECORDING SUPPORT.
DE69130076D1 (en) Video signal transmission system and method for encoding video signals
EP0663739A4 (en) Digital signal encoding device, its decoding device, and its recording medium.
DE69807499T2 (en) SIGNALING SYSTEM, APPARATUS AND METHOD
EP0515143A3 (en) Video signal encoding and decoding apparatus
FI924512A (en) FOERFARANDE FOER SYNKRONISERING AV EN PSEUDOSLUMPMAESSIG BINAERSEKVENS I EN DESSCRAMBLER
EP0680217A3 (en) Video signal decoding apparatus capable of reducing blocking effects.
NO941815D0 (en) Methods and apparatus for transmitting program data signals through a remote control unit
ATE232030T1 (en) CODING DEVICE FOR CODING A VARIETY OF INFORMATION SIGNALS
SE9001672D0 (en) PAYMENT TV SYSTEM REQUEST
EP0892558A4 (en) Picture signal coding device, picture signal coding method, picture signal decoding device, picture signal decoding method, and recording medium
SE8904055D0 (en) DEVICE ON PAYMENT-TV SYSTEM
SE8803814D0 (en) SYSTEM FOR ENCODING / DECODING SIGNALS
NO891690D0 (en) DEVICE BY TV COMMUNICATION SYSTEM.
NO930838L (en) PROCEDURE AND DECODES FOR CODED VIDEO SIGNAL DECODING
SE9103098D0 (en) DEVICE ON TV SYSTEM
SE9202779D0 (en) A SYSTEM FOR THE SIMULATANEOUS CODING OF A NUMBER OF TELEVISION SIGNALS AND FOR DECODING THEREOF IN RADIO FREQUENCY
SE9603381D0 (en) Method and apparatus for coding cable television
JPS63121334A (en) Privacy communication system
RU93003728A (en) DEVICE TELEVISION SIGNAL TRANSFORMATION
TH21567A (en) Digital TV decoder with large waves
MX9802155A (en) Decoder and decoding method.
KR960036660A (en) Information exchange device of CATV system