JPS55121782A - Video code process system for television - Google Patents
Video code process system for televisionInfo
- Publication number
- JPS55121782A JPS55121782A JP2853379A JP2853379A JPS55121782A JP S55121782 A JPS55121782 A JP S55121782A JP 2853379 A JP2853379 A JP 2853379A JP 2853379 A JP2853379 A JP 2853379A JP S55121782 A JPS55121782 A JP S55121782A
- Authority
- JP
- Japan
- Prior art keywords
- video signal
- signal
- circuit
- inversion
- 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.)
- Granted
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
- H04N7/171—Systems operating in the amplitude domain of the television signal
- H04N7/1716—Systems operating in the amplitude domain of the television signal by inverting the polarity of active picture signal portions
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2853379A JPS55121782A (en) | 1979-03-12 | 1979-03-12 | Video code process system for television |
US06/128,152 US4308556A (en) | 1979-03-12 | 1980-03-07 | Television video signal scrambling system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2853379A JPS55121782A (en) | 1979-03-12 | 1979-03-12 | Video code process system for television |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55121782A true JPS55121782A (en) | 1980-09-19 |
JPS625396B2 JPS625396B2 (ja) | 1987-02-04 |
Family
ID=12251299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2853379A Granted JPS55121782A (en) | 1979-03-12 | 1979-03-12 | Video code process system for television |
Country Status (2)
Country | Link |
---|---|
US (1) | US4308556A (ja) |
JP (1) | JPS55121782A (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5717287A (en) * | 1980-05-14 | 1982-01-28 | Oak Industries Inc | Subscription television |
JPS58131872A (ja) * | 1982-01-30 | 1983-08-05 | Sony Corp | テレビジヨン信号送出システム |
JPS58184887A (ja) * | 1982-04-22 | 1983-10-28 | Sony Corp | テレビジヨン信号伝送システム |
JPS6276880A (ja) * | 1985-09-30 | 1987-04-08 | Toshiba Corp | 映像スクランブル方式 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4454543A (en) * | 1981-11-06 | 1984-06-12 | Oak Industries Inc. | Dynamic video scrambling |
US4568974A (en) * | 1982-10-28 | 1986-02-04 | Oak Industries Inc. | Video scrambling by the application of a variable periodic scrambling waveform |
US4636853A (en) * | 1983-12-21 | 1987-01-13 | Zenith Electronics Corporation | Dynamic audio scrambling system |
US4759061A (en) * | 1985-11-01 | 1988-07-19 | Zenith Electronics Corporation | Technique for toggling coding mode in a television signal encoder |
US4888799A (en) * | 1986-01-03 | 1989-12-19 | Scientific Atlanta, Inc. | Scrambling of signals by inversion |
US4870682A (en) * | 1987-02-25 | 1989-09-26 | Household Data Services (Hds) | Television scrambling system |
US20010030511A1 (en) * | 2000-04-18 | 2001-10-18 | Shunpei Yamazaki | Display device |
TW512304B (en) * | 2000-06-13 | 2002-12-01 | Semiconductor Energy Lab | Display device |
US8194006B2 (en) | 2004-08-23 | 2012-06-05 | Semiconductor Energy Laboratory Co., Ltd. | Display device, driving method of the same, and electronic device comprising monitoring elements |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4022972A (en) * | 1975-05-13 | 1977-05-10 | Teleglobe Pay Tv System Inc. | Transient suppression and grey level coincidence in a subscription television system |
-
1979
- 1979-03-12 JP JP2853379A patent/JPS55121782A/ja active Granted
-
1980
- 1980-03-07 US US06/128,152 patent/US4308556A/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5717287A (en) * | 1980-05-14 | 1982-01-28 | Oak Industries Inc | Subscription television |
JPH027555B2 (ja) * | 1980-05-14 | 1990-02-19 | Oak Industries Inc | |
JPS58131872A (ja) * | 1982-01-30 | 1983-08-05 | Sony Corp | テレビジヨン信号送出システム |
JPS58184887A (ja) * | 1982-04-22 | 1983-10-28 | Sony Corp | テレビジヨン信号伝送システム |
JPH057918B2 (ja) * | 1982-04-22 | 1993-01-29 | Sony Corp | |
JPS6276880A (ja) * | 1985-09-30 | 1987-04-08 | Toshiba Corp | 映像スクランブル方式 |
Also Published As
Publication number | Publication date |
---|---|
JPS625396B2 (ja) | 1987-02-04 |
US4308556A (en) | 1981-12-29 |
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