ES8608764A1 - Un equipo receptor de television,en el que los componentes de imagen de una senal de television estan codificados se- cretamente - Google Patents

Un equipo receptor de television,en el que los componentes de imagen de una senal de television estan codificados se- cretamente

Info

Publication number
ES8608764A1
ES8608764A1 ES541818A ES541818A ES8608764A1 ES 8608764 A1 ES8608764 A1 ES 8608764A1 ES 541818 A ES541818 A ES 541818A ES 541818 A ES541818 A ES 541818A ES 8608764 A1 ES8608764 A1 ES 8608764A1
Authority
ES
Spain
Prior art keywords
sound
pseudo random
scrambled
scrambling
output
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
ES541818A
Other languages
English (en)
Other versions
ES541818A0 (es
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.)
Independent Broadcasting Authority
Koninklijke Philips NV
Original Assignee
Independent Broadcasting Authority
Philips Gloeilampenfabrieken NV
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 Independent Broadcasting Authority, Philips Gloeilampenfabrieken NV filed Critical Independent Broadcasting Authority
Publication of ES541818A0 publication Critical patent/ES541818A0/es
Publication of ES8608764A1 publication Critical patent/ES8608764A1/es
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
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence

Abstract

EQUIPO DE RECEPTOR DE TELEVISION MODIFICADO. CONSTA DE: UN AMPLIFICADOR DE R.F. Y UNA ETAPA CAMBIADORA DE FRECUENCIA (5); UN AMPLIFICADOR DE FJ (6); UN DEMODULADOR DE FRECUENCIA (7); UN TRATADOR DE SEÑAL DE IMAGEN (8); UN DEMODULADOR DIGITAL (9); UN TRATADOR (10) DE SEÑAL DE SONIDOS/DATOS; UN CIRCUITO (12) INTEGRADO MONTADO EN UNA TARJETA DE PLASTICO (13) Y DOTADO CON UN CONVERTIDOR (12A) Y CON UN GENERADOR PRINCIPAL DE SECUENCIA BINARIA PSEUDO-ALEATORIA (12B); UN GENERADOR SECUNDARIO (15) DE SECUENCIA PSEUDO-ALEATORIA DE BITS DE IMAGEN; TRES PRBS SECUNDARIOS DE SONIDO.DATOS (17, 18, 19); UN DISPOSITIVO DE REPRESENTACION DE IMAGEN (20) Y UN SISTEMA DE ALTAVOZ (21).
ES541818A 1983-06-20 1985-04-01 Un equipo receptor de television,en el que los componentes de imagen de una senal de television estan codificados se- cretamente Expired ES8608764A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08316751A GB2141905A (en) 1983-06-20 1983-06-20 Secure transmission system

Publications (2)

Publication Number Publication Date
ES541818A0 ES541818A0 (es) 1986-06-16
ES8608764A1 true ES8608764A1 (es) 1986-06-16

Family

ID=10544510

Family Applications (3)

Application Number Title Priority Date Filing Date
ES533506A Granted ES533506A0 (es) 1983-06-20 1984-06-18 Una instalacion de transmision de television
ES541817A Expired ES8608763A1 (es) 1983-06-20 1985-04-01 Un equipo de transmision de television, destinado a generar una senal de television
ES541818A Expired ES8608764A1 (es) 1983-06-20 1985-04-01 Un equipo receptor de television,en el que los componentes de imagen de una senal de television estan codificados se- cretamente

Family Applications Before (2)

Application Number Title Priority Date Filing Date
ES533506A Granted ES533506A0 (es) 1983-06-20 1984-06-18 Una instalacion de transmision de television
ES541817A Expired ES8608763A1 (es) 1983-06-20 1985-04-01 Un equipo de transmision de television, destinado a generar una senal de television

Country Status (9)

Country Link
US (1) US4636854A (es)
EP (1) EP0131983B1 (es)
JP (1) JP2563895B2 (es)
CA (1) CA1228153A (es)
DE (1) DE3483125D1 (es)
ES (3) ES533506A0 (es)
FI (1) FI76660C (es)
GB (1) GB2141905A (es)
HK (1) HK125493A (es)

Families Citing this family (10)

* 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
US4890321A (en) * 1986-07-08 1989-12-26 Scientific Atlanta, Inc. Communications format for a subscription television system permitting transmission of individual text messages to subscribers
US4866770A (en) * 1986-07-08 1989-09-12 Scientific Atlanta, Inc. Method and apparatus for communication of video, audio, teletext, and data to groups of decoders in a communication system
NZ237080A (en) * 1990-03-07 1993-05-26 Ericsson Telefon Ab L M Continuous synchronisation for duplex encrypted digital cellular telephony
US5581614A (en) * 1991-08-19 1996-12-03 Index Systems, Inc. Method for encrypting and embedding information in a video program
GB2400496B (en) * 1991-12-11 2005-02-09 Marconi Gec Ltd Signal processing apparatus
JPH0552029U (ja) * 1991-12-25 1993-07-09 森村金属株式会社 格子組天井の目地カバーの取付構造
FR2710223A1 (fr) * 1993-09-15 1995-03-24 Philips Electronics Nv Procédé pour l'embrouillage et le désembrouillage en télévision, et émetteur et récepteur utilisant ce procédé.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1429469A (en) * 1961-07-19 1976-03-24 Hell Rudolf Method for subsequently setting data receivers in a contrinuous transmission of encoded data transmitted in binary code form
JPS51115718A (en) * 1975-02-24 1976-10-12 Pioneer Electronic Corp Bi-directional catv system
CA1097794A (en) * 1975-08-08 1981-03-17 Harold B. Shutterly Secure television transmission system
FR2431809A1 (fr) * 1978-07-20 1980-02-15 Telediffusion Fse Procedes et dispositifs de brouillage et de debrouillage pour images de television
US4266243A (en) * 1979-04-25 1981-05-05 Westinghouse Electric Corp. Scrambling system for television sound signals
US4318125A (en) * 1979-04-25 1982-03-02 Westinghouse Electric Corp. Solid state digital audio scrambler system for teletransmission of audio intelligence through a television system
FR2459595A1 (fr) * 1979-06-15 1981-01-09 Telediffusion Fse Systeme de television a controle d'acces utilisant une cle electronique variable
US4424532A (en) * 1980-05-14 1984-01-03 Oak Industries Inc. Coding and decoding system for video and audio signals
US4353088A (en) * 1980-05-14 1982-10-05 Oak Industries, Inc. Coding and decoding system for video and audio signals
US4484027A (en) * 1981-11-19 1984-11-20 Communications Satellite Corporation Security system for SSTV encryption
US4547802A (en) * 1983-04-29 1985-10-15 Westinghouse Electric Corp. TV Scrambler/descrambler using serial memories

Also Published As

Publication number Publication date
JP2563895B2 (ja) 1996-12-18
FI842436A0 (fi) 1984-06-15
ES541818A0 (es) 1986-06-16
HK125493A (en) 1993-11-19
FI842436A (fi) 1984-12-21
EP0131983A2 (en) 1985-01-23
EP0131983A3 (en) 1986-03-19
ES8600595A1 (es) 1985-09-16
FI76660C (fi) 1988-11-10
DE3483125D1 (de) 1990-10-11
EP0131983B1 (en) 1990-09-05
ES533506A0 (es) 1985-09-16
GB2141905A (en) 1985-01-03
ES541817A0 (es) 1986-06-16
JPS6014586A (ja) 1985-01-25
FI76660B (fi) 1988-07-29
CA1228153A (en) 1987-10-13
ES8608763A1 (es) 1986-06-16
US4636854A (en) 1987-01-13

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Legal Events

Date Code Title Description
PC1A Transfer granted
FD1A Patent lapsed

Effective date: 20051210