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 procedimientoInfo
- 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
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.
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)
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)
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 |
-
1988
- 1988-12-23 FR FR8817093A patent/FR2641153B1/fr not_active Expired - Fee Related
-
1989
- 1989-12-08 JP JP2500707A patent/JP2956019B2/ja not_active Expired - Lifetime
- 1989-12-08 BR BR898907276A patent/BR8907276A/pt not_active IP Right Cessation
- 1989-12-08 US US07/566,346 patent/US5177485A/en not_active Expired - Fee Related
- 1989-12-08 WO PCT/FR1989/000637 patent/WO1990007846A1/fr unknown
- 1989-12-19 ES ES89403553T patent/ES2071677T3/es not_active Expired - Lifetime
- 1989-12-19 DE DE68922080T patent/DE68922080T2/de not_active Expired - Fee Related
- 1989-12-19 EP EP89403553A patent/EP0375540B1/fr not_active Expired - Lifetime
- 1989-12-19 AT AT89403553T patent/ATE120916T1/de not_active IP Right Cessation
- 1989-12-21 CA CA002006458A patent/CA2006458A1/fr not_active Abandoned
- 1989-12-22 MX MX018874A patent/MX172074B/es unknown
-
1990
- 1990-01-04 NZ NZ232006A patent/NZ232006A/xx unknown
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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