AU526049B2 - Subscription television coding/decoding system - Google Patents
Subscription television coding/decoding systemInfo
- Publication number
- AU526049B2 AU526049B2 AU53097/79A AU5309779A AU526049B2 AU 526049 B2 AU526049 B2 AU 526049B2 AU 53097/79 A AU53097/79 A AU 53097/79A AU 5309779 A AU5309779 A AU 5309779A AU 526049 B2 AU526049 B2 AU 526049B2
- Authority
- AU
- Australia
- Prior art keywords
- decoding system
- subscription television
- television coding
- coding
- subscription
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
- H04N7/085—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only the inserted signal being digital
-
- 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
- H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US96594078A | 1978-12-04 | 1978-12-04 | |
US965940 | 1978-12-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
AU5309779A AU5309779A (en) | 1980-06-12 |
AU526049B2 true AU526049B2 (en) | 1982-12-16 |
Family
ID=25510704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU53097/79A Expired AU526049B2 (en) | 1978-12-04 | 1979-11-22 | Subscription television coding/decoding system |
Country Status (12)
Country | Link |
---|---|
JP (2) | JPS5588481A (el) |
AU (1) | AU526049B2 (el) |
BR (1) | BR7907803A (el) |
CA (1) | CA1150818A (el) |
CH (1) | CH661398A5 (el) |
DE (1) | DE2947943C2 (el) |
FR (1) | FR2443778B1 (el) |
GB (1) | GB2038137B (el) |
GR (1) | GR82329B (el) |
IL (1) | IL58735A (el) |
MX (1) | MX147755A (el) |
NL (1) | NL188137C (el) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4336553A (en) * | 1980-05-14 | 1982-06-22 | Oak Industries | Method of coding audio and video signals |
US4353088A (en) * | 1980-05-14 | 1982-10-05 | Oak Industries, Inc. | Coding and decoding system for video and audio signals |
US4340906A (en) * | 1980-05-14 | 1982-07-20 | Oak Industries Inc. | Video signal coding by video signal polarity reversal on the basis of brightness level comparison |
US4621285A (en) * | 1980-12-10 | 1986-11-04 | Jerrold Division, General Instrument Corporation | Protected television signal distribution system |
CA1338158C (en) * | 1982-07-15 | 1996-03-12 | John D. Lowry | Encryption and decryption (scrambling and unscrambling) of video signals |
DE3466636D1 (en) * | 1983-02-18 | 1987-11-05 | Sanyo Electric Co | Scrambling system of television signal |
JPS59152786A (ja) * | 1983-02-18 | 1984-08-31 | Sanyo Electric Co Ltd | Catv放送におけるスクランブル方式 |
DE3479952D1 (en) * | 1983-04-21 | 1989-11-02 | Gen Instrument Corp | Scrambling system for television video signal |
US4594609A (en) * | 1983-06-30 | 1986-06-10 | Viewstar Inc. | Scrambling system for television video signal |
EP0133190A1 (en) * | 1983-08-01 | 1985-02-20 | Payview Limited | Encoding and decoding of a television signal |
US4745476A (en) * | 1984-02-15 | 1988-05-17 | Matsushita Electric Industrial Co., Ltd. | Television sound signal processing apparatus |
DE3432653C1 (de) * | 1984-09-05 | 1986-01-16 | Westdeutscher Rundfunk, Anstalt des öffentlichen Rechts, 5000 Köln | Verfahren zum Übertragen von Fersehprogrammen an berechtigte Teilnehmer |
FR2572612B1 (fr) * | 1984-10-31 | 1986-12-26 | Cgv Comp Gen Videotech | Interface entre decodeur video et recepteur de television |
US4815129A (en) * | 1985-01-02 | 1989-03-21 | General Instrument Corp. | Video encryption system |
DE3638554A1 (de) * | 1986-11-12 | 1988-05-26 | Siemens Ag | Verfahren und anordnung zum verschluesseln von digitalen videosignalen |
GB2216359B (en) * | 1988-03-18 | 1992-05-20 | Marconi Gec Ltd | Synchronisation |
AU6013394A (en) * | 1993-01-15 | 1994-08-15 | Nauchno-Proizvodstvennaya Firma 'elektronika Ltd.' | Method of relaying data via teevision channels and a system for carrying out same |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3184537A (en) * | 1960-10-04 | 1965-05-18 | Paramount Pictures Corp | Subscription-television system employing suppression of synchronizing signals |
FR1287695A (fr) * | 1960-10-04 | 1962-03-16 | Paramount Pictures Corp | Systèmes de télévision payante |
US3485941A (en) * | 1965-04-12 | 1969-12-23 | R & R Research Ltd | Television system with modified sync signals and auxiliary timing information |
NL7016628A (el) * | 1970-11-13 | 1972-05-16 | ||
JPS4924530A (el) * | 1972-06-30 | 1974-03-05 | ||
JPS5236593B2 (el) * | 1973-08-09 | 1977-09-16 | ||
US3919462A (en) * | 1973-08-15 | 1975-11-11 | System Dev Corp | Method and apparatus for scrambling and unscrambling communication signals |
JPS5120623A (ja) * | 1974-08-14 | 1976-02-19 | Matsushita Electric Ind Co Ltd | Shingodensohoshiki |
JPS5169927A (ja) * | 1974-12-13 | 1976-06-17 | Fujitsu Ltd | Terebijonfukugoeizoshingohoshiki |
FR2313825A1 (fr) * | 1975-06-06 | 1976-12-31 | Telediffusion Fse | Systeme de diffusion de donnees |
US4095258A (en) * | 1976-10-15 | 1978-06-13 | Blonder-Tongue Laboratories, Inc. | Apparatus for decoding scrambled television and similar transmissions |
JPS53113427A (en) * | 1977-03-15 | 1978-10-03 | Matsushita Electric Ind Co Ltd | Sampling clock reproducer |
-
1979
- 1979-11-16 IL IL58735A patent/IL58735A/xx unknown
- 1979-11-20 CA CA000340211A patent/CA1150818A/en not_active Expired
- 1979-11-20 GR GR60551A patent/GR82329B/el unknown
- 1979-11-22 AU AU53097/79A patent/AU526049B2/en not_active Expired
- 1979-11-26 NL NLAANVRAGE7908569,A patent/NL188137C/xx not_active IP Right Cessation
- 1979-11-27 GB GB7940978A patent/GB2038137B/en not_active Expired
- 1979-11-28 DE DE2947943A patent/DE2947943C2/de not_active Expired
- 1979-11-29 CH CH10621/79A patent/CH661398A5/de not_active IP Right Cessation
- 1979-11-30 BR BR7907803A patent/BR7907803A/pt unknown
- 1979-12-03 FR FR7929682A patent/FR2443778B1/fr not_active Expired
- 1979-12-04 MX MX180309A patent/MX147755A/es unknown
- 1979-12-04 JP JP15732979A patent/JPS5588481A/ja active Pending
-
1988
- 1988-01-18 JP JP1988004588U patent/JPS63131287U/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS63131287U (el) | 1988-08-26 |
JPS5588481A (en) | 1980-07-04 |
CA1150818A (en) | 1983-07-26 |
FR2443778B1 (fr) | 1986-04-11 |
MX147755A (es) | 1983-01-10 |
FR2443778A1 (fr) | 1980-07-04 |
NL188137B (nl) | 1991-11-01 |
NL188137C (nl) | 1992-04-01 |
CH661398A5 (de) | 1987-07-15 |
GR82329B (el) | 1984-12-13 |
IL58735A0 (en) | 1980-02-29 |
GB2038137B (en) | 1983-04-13 |
IL58735A (en) | 1982-01-31 |
GB2038137A (en) | 1980-07-16 |
DE2947943C2 (de) | 1985-04-18 |
DE2947943A1 (de) | 1980-06-26 |
BR7907803A (pt) | 1980-07-29 |
AU5309779A (en) | 1980-06-12 |
NL7908569A (nl) | 1980-06-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |