FR2271727B1 - - Google Patents
Info
- Publication number
- FR2271727B1 FR2271727B1 FR7403981A FR7403981A FR2271727B1 FR 2271727 B1 FR2271727 B1 FR 2271727B1 FR 7403981 A FR7403981 A FR 7403981A FR 7403981 A FR7403981 A FR 7403981A FR 2271727 B1 FR2271727 B1 FR 2271727B1
- Authority
- FR
- France
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N2007/17372—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal the upstream transmission being initiated or timed by a signal from upstream of the user terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N2007/1739—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal the upstream communication being transmitted via a separate link, e.g. telephone line
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7403981A FR2271727A1 (en) | 1974-02-06 | 1974-02-06 | Cable television distribution system - has separate return channel from subscriber on telephone line to reduce noise |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7403981A FR2271727A1 (en) | 1974-02-06 | 1974-02-06 | Cable television distribution system - has separate return channel from subscriber on telephone line to reduce noise |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2271727A1 FR2271727A1 (en) | 1975-12-12 |
FR2271727B1 true FR2271727B1 (en) | 1979-05-25 |
Family
ID=9134562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7403981A Granted FR2271727A1 (en) | 1974-02-06 | 1974-02-06 | Cable television distribution system - has separate return channel from subscriber on telephone line to reduce noise |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2271727A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1586543A (en) * | 1978-01-23 | 1981-03-18 | Communications Patents Ltd | Wired broadcasting systems |
GB2121656B (en) * | 1982-05-14 | 1986-08-20 | Communications Patents Ltd | Communications system |
-
1974
- 1974-02-06 FR FR7403981A patent/FR2271727A1/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FR2271727A1 (en) | 1975-12-12 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |