JPS625506B2 - - Google Patents
Info
- Publication number
- JPS625506B2 JPS625506B2 JP54173102A JP17310279A JPS625506B2 JP S625506 B2 JPS625506 B2 JP S625506B2 JP 54173102 A JP54173102 A JP 54173102A JP 17310279 A JP17310279 A JP 17310279A JP S625506 B2 JPS625506 B2 JP S625506B2
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- signal
- level
- encryption processing
- processing method
- 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
Links
- 238000003672 processing method Methods 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17310279A JPS56103581A (en) | 1979-12-29 | 1979-12-29 | Cipher process system of video signal |
US06/516,187 US4463376A (en) | 1979-12-29 | 1983-07-21 | Television signal processing system for a wireless pay system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17310279A JPS56103581A (en) | 1979-12-29 | 1979-12-29 | Cipher process system of video signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56103581A JPS56103581A (en) | 1981-08-18 |
JPS625506B2 true JPS625506B2 (US06826419-20041130-M00005.png) | 1987-02-05 |
Family
ID=15954207
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17310279A Granted JPS56103581A (en) | 1979-12-29 | 1979-12-29 | Cipher process system of video signal |
Country Status (2)
Country | Link |
---|---|
US (1) | US4463376A (US06826419-20041130-M00005.png) |
JP (1) | JPS56103581A (US06826419-20041130-M00005.png) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0452308U (US06826419-20041130-M00005.png) * | 1990-09-07 | 1992-05-01 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2534237B1 (fr) * | 1982-10-12 | 1987-10-23 | Krupp Gmbh | Grue roulante de grande force portante a fleche extensible, notamment a fleche telescopique |
US4575755A (en) * | 1982-12-14 | 1986-03-11 | Tocom, Inc. | Video encoder/decoder system |
US5130810A (en) * | 1983-11-23 | 1992-07-14 | Macrovision Corporation | Method and apparatus for processing a video signal so as to prohibit the making of acceptable videotape recordings |
SE8406489L (sv) * | 1984-12-19 | 1986-06-20 | Nordspace Ab | Televisionsmottagningssystem |
GB2231755B (en) * | 1989-04-21 | 1993-10-06 | Pioneer Electronic Corp | Method for scrambling a television signal and method and apparatus for descrambling a scrambled television signal |
GB8911493D0 (en) * | 1989-05-18 | 1989-07-05 | Indep Broadcasting Authority | Data transmission in the active picture period |
DE3936179A1 (de) * | 1989-10-31 | 1991-05-02 | Thomson Brandt Gmbh | Fernsehuebertragungssystem |
US5737417A (en) * | 1995-04-24 | 1998-04-07 | Technicolor Videocassette, Inc. | Videotape anti-copying encryption scheme |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3081376A (en) * | 1959-03-23 | 1963-03-12 | Zenith Radio Corp | Subscription television system |
US3439113A (en) * | 1963-11-15 | 1969-04-15 | Teleglobe Pay Tv System Inc | Subscription television communication system |
-
1979
- 1979-12-29 JP JP17310279A patent/JPS56103581A/ja active Granted
-
1983
- 1983-07-21 US US06/516,187 patent/US4463376A/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0452308U (US06826419-20041130-M00005.png) * | 1990-09-07 | 1992-05-01 |
Also Published As
Publication number | Publication date |
---|---|
US4463376A (en) | 1984-07-31 |
JPS56103581A (en) | 1981-08-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4424532A (en) | Coding and decoding system for video and audio signals | |
US4336553A (en) | Method of coding audio and video signals | |
US4353088A (en) | Coding and decoding system for video and audio signals | |
US4340906A (en) | Video signal coding by video signal polarity reversal on the basis of brightness level comparison | |
US4458268A (en) | Sync displacement scrambling | |
JPS62165494A (ja) | スクランブル・ビデオ信号用の自動利得制御装置 | |
GB1028025A (en) | Improvements in or relating to television systems | |
EP0449633A1 (en) | Pay television | |
JPS625506B2 (US06826419-20041130-M00005.png) | ||
US3204026A (en) | Narrow bandwidth scanning system | |
ES472139A1 (es) | Perfeccionamientos en circuitos de fijacion de la senal de nivel de supresion del haz electronico para receptores de television | |
US3506780A (en) | Signal transducer systems | |
US3812289A (en) | Television receiver using synchronous video detection | |
US3986204A (en) | Video synchronizing apparatus and method | |
US2231829A (en) | Television synchronizing system | |
US3466387A (en) | Sound demodulator for television receiver | |
GB1117725A (en) | Demodulating circuit for waves frequency modulated by signals of the video type | |
US5029340A (en) | CATV terminal unit having an improved descrambling operation | |
US3862361A (en) | Video amplifier circuit for use with synchronous detectors | |
US5272751A (en) | Pay television | |
WO1985005525A1 (en) | Non-linear sync signal processing circuit | |
US4390899A (en) | Television signal processing system | |
US2987576A (en) | Secrecy communication system | |
US3514533A (en) | Video signal processing circuit | |
JPS6011871B2 (ja) | キユー信号の挿入装置 |