FI925042A - Frekvensfoervandlingssystem foer video - Google Patents
Frekvensfoervandlingssystem foer video Download PDFInfo
- Publication number
- FI925042A FI925042A FI925042A FI925042A FI925042A FI 925042 A FI925042 A FI 925042A FI 925042 A FI925042 A FI 925042A FI 925042 A FI925042 A FI 925042A FI 925042 A FI925042 A FI 925042A
- Authority
- FI
- Finland
- Prior art keywords
- video
- information system
- frequency information
- system foer
- foer
- 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)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP30064191 | 1991-11-15 | ||
JP30064191 | 1991-11-15 | ||
JP2845492 | 1992-02-14 | ||
JP4028454A JPH07193804A (ja) | 1991-11-15 | 1992-02-14 | 映像スクランブル方式およびその装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
FI925042A0 FI925042A0 (fi) | 1992-11-06 |
FI925042A true FI925042A (fi) | 1993-05-16 |
FI100289B FI100289B (fi) | 1997-10-31 |
Family
ID=26366568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI925042A FI100289B (fi) | 1991-11-15 | 1992-11-06 | Videosalausjärjestelmä ja -laitteisto |
Country Status (6)
Country | Link |
---|---|
US (1) | US5410601A (fi) |
JP (1) | JPH07193804A (fi) |
FI (1) | FI100289B (fi) |
GB (1) | GB2261570B (fi) |
NO (1) | NO924357L (fi) |
SE (1) | SE9203393L (fi) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5606612A (en) * | 1994-07-25 | 1997-02-25 | General Instrument Corporation, Jerrold Communications Division | Method and apparatus for television signal scrambling using a line expansion technique |
KR0179515B1 (ko) * | 1995-10-25 | 1999-05-01 | 이형도 | 영상신호 암호화 장치 |
GB2319683A (en) * | 1996-11-19 | 1998-05-27 | Digi Media Vision Ltd | Apparatus to decode an input video signal |
US5831420A (en) * | 1997-04-28 | 1998-11-03 | Motorola, Inc. | Pulse load averaging power converter |
US6976265B1 (en) * | 1998-10-08 | 2005-12-13 | Ati International Srl | Method and apparatus for controlling display of content signals |
US6950520B1 (en) * | 1999-01-26 | 2005-09-27 | Macrovision Corporation | Method and apparatus for carrying data in a video signal so that the data is not recorded |
JP2002202719A (ja) * | 2000-11-06 | 2002-07-19 | Sony Corp | 暗号化装置及び方法、復号装置及び方法、並びに記憶媒体 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4458268A (en) * | 1982-01-08 | 1984-07-03 | Zenith Radio Corporation | Sync displacement scrambling |
EP0105897A1 (en) * | 1982-04-23 | 1984-04-25 | Independent Broadcasting Authority | Signal coding for secure transmission |
US4642688A (en) * | 1983-06-24 | 1987-02-10 | Scientific Atlanta, Inc. | Method and apparatus for creating encrypted and decrypted television signals |
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 |
US4742544A (en) * | 1984-07-09 | 1988-05-03 | Kupnicki Richard A | Television transmission network with scrambling and descrambling |
US4914694A (en) * | 1988-04-11 | 1990-04-03 | Eidak Corporation | Modifying a television signal to inhibit recording/reproduction |
-
1992
- 1992-02-14 JP JP4028454A patent/JPH07193804A/ja active Pending
- 1992-11-06 FI FI925042A patent/FI100289B/fi active
- 1992-11-12 NO NO92924357A patent/NO924357L/no unknown
- 1992-11-13 SE SE9203393A patent/SE9203393L/ not_active Application Discontinuation
- 1992-11-13 GB GB9223901A patent/GB2261570B/en not_active Expired - Lifetime
- 1992-11-16 US US07/977,290 patent/US5410601A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
GB9223901D0 (en) | 1993-01-06 |
FI925042A0 (fi) | 1992-11-06 |
NO924357D0 (no) | 1992-11-12 |
SE9203393L (sv) | 1993-05-16 |
NO924357L (no) | 1993-05-18 |
SE9203393D0 (sv) | 1992-11-13 |
GB2261570B (en) | 1995-08-02 |
JPH07193804A (ja) | 1995-07-28 |
FI100289B (fi) | 1997-10-31 |
GB2261570A (en) | 1993-05-19 |
US5410601A (en) | 1995-04-25 |
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