MX172074B - Procedmiento de embrollado de señales de video compuestas pal, secam y ntsc, y descodificador de señales embrolladas por medio de ese procedimiento - Google Patents

Procedmiento de embrollado de señales de video compuestas pal, secam y ntsc, y descodificador de señales embrolladas por medio de ese procedimiento

Info

Publication number
MX172074B
MX172074B MX018874A MX1887489A MX172074B MX 172074 B MX172074 B MX 172074B MX 018874 A MX018874 A MX 018874A MX 1887489 A MX1887489 A MX 1887489A MX 172074 B MX172074 B MX 172074B
Authority
MX
Mexico
Prior art keywords
procedure
signals
composite video
embrolling
secam
Prior art date
Application number
MX018874A
Other languages
English (en)
Inventor
Patrick Daniel
Jean-Claude Guillon
Original Assignee
Europ Rech Electr Lab
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 Europ Rech Electr Lab filed Critical Europ Rech Electr Lab
Publication of MX172074B publication Critical patent/MX172074B/es

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
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1693—Systems operating in the time domain of the television signal by displacing synchronisation signals relative to active picture signals or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)
  • Color Television Systems (AREA)
  • Processing Of Color Television Signals (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

La presente invención se refiere a procedimiento de embrollado de señales de video compuestas PAL Y SECAM Y NTSC, según el cual se efectúa el embrollado mediante permutación de línea mandada por una secuencia seudo-aleatoria, y el desembrollado con la ayuda de una secuencia seudo-aleatoria idéntica o sincronizada con aquella de embrollado, dependiendo la secuencia seudo-aleatoria de embrollado, de una palabra de mando cuyo valor encajado se incorporaa la señal de video compuesta, caracterizado en que sedesplaza el principio de la zona embrollada de cada línea en relación con el principio de la línea siguiente.
MX018874A 1988-12-23 1989-12-22 Procedmiento de embrollado de señales de video compuestas pal, secam y ntsc, y descodificador de señales embrolladas por medio de ese procedimiento MX172074B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8817093A FR2641153B1 (es) 1988-12-23 1988-12-23

Publications (1)

Publication Number Publication Date
MX172074B true MX172074B (es) 1992-12-01

Family

ID=9373356

Family Applications (1)

Application Number Title Priority Date Filing Date
MX018874A MX172074B (es) 1988-12-23 1989-12-22 Procedmiento de embrollado de señales de video compuestas pal, secam y ntsc, y descodificador de señales embrolladas por medio de ese procedimiento

Country Status (12)

Country Link
US (1) US5177485A (es)
EP (1) EP0375540B1 (es)
JP (1) JP2956019B2 (es)
AT (1) ATE120916T1 (es)
BR (1) BR8907276A (es)
CA (1) CA2006458A1 (es)
DE (1) DE68922080T2 (es)
ES (1) ES2071677T3 (es)
FR (1) FR2641153B1 (es)
MX (1) MX172074B (es)
NZ (1) NZ232006A (es)
WO (1) WO1990007846A1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05207465A (ja) * 1992-01-24 1993-08-13 Matsushita Electric Ind Co Ltd ビデオシアターシステムとビデオシアター再生装置
JPH11298878A (ja) 1998-04-08 1999-10-29 Nec Corp 画像スクランブル方法およびそれを実施する装置
US20060069615A1 (en) * 2004-09-29 2006-03-30 Ajay Gupta Systems and methods for subsidizing the printing costs of advertiser-sponsored documents delivered through broadcast networks
WO2006035450A1 (en) 2004-09-29 2006-04-06 Hewlett-Packard Development Company L.P. Systems and methods for soliciting feedback using print-augmented broadcast signal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2847768A (en) * 1954-03-29 1958-08-19 Zenith Radio Corp Subscription television encoding apparatus
US4563702A (en) * 1983-05-27 1986-01-07 M/A-Com Linkabit, Inc. Video signal scrambling and descrambling systems
JPS60102074A (ja) * 1983-11-09 1985-06-06 Nec Corp テレビジヨン映像信号スクランブル方式
BE903993A (fr) * 1985-01-09 1986-05-02 Technical Developments And Inv Procedes et dispositifs d'analyse et de reconnaissance du code de cryptage d'emissions de television.
US4736420A (en) * 1986-09-19 1988-04-05 M/A-Com Government Systems, Inc. Video scrambling by segmenting video information lines
US4916736A (en) * 1988-06-07 1990-04-10 Macrovision Corporation Method and apparatus for encrypting and decrypting time domain signals

Also Published As

Publication number Publication date
JPH03504792A (ja) 1991-10-17
US5177485A (en) 1993-01-05
FR2641153B1 (es) 1991-03-01
JP2956019B2 (ja) 1999-10-04
DE68922080D1 (de) 1995-05-11
ES2071677T3 (es) 1995-07-01
EP0375540A1 (fr) 1990-06-27
EP0375540B1 (fr) 1995-04-05
DE68922080T2 (de) 1995-09-28
BR8907276A (pt) 1991-03-12
WO1990007846A1 (fr) 1990-07-12
CA2006458A1 (fr) 1990-06-23
NZ232006A (en) 1991-11-26
ATE120916T1 (de) 1995-04-15
FR2641153A1 (es) 1990-06-29

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