ZA787225B - Improvements in or relating to wired broadcasting systems - Google Patents

Improvements in or relating to wired broadcasting systems

Info

Publication number: ZA787225B
Authority: ZA; South Africa
Prior art keywords: relating; broadcasting systems; wired broadcasting; wired; systems
Prior art date: 1978-01-23

Application number

ZA00787225A

Other languages

English (en)

Inventor

E Gargini

Original Assignee

Communications Patents Ltd

Priority date (The priority date 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 date listed.)

1978-01-23

Filing date

1978-12-21

Publication date

1979-12-27

1978-12-21 Application filed by Communications Patents Ltd filed Critical Communications Patents Ltd

1979-12-27 Publication of ZA787225B publication Critical patent/ZA787225B/xx

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
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17345—Control of the passage of the selected programme
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
- 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

Landscapes

Engineering & Computer Science (AREA)
Multimedia (AREA)
Signal Processing (AREA)
Optical Communication System (AREA)
Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

ZA00787225A 1978-01-23 1978-12-21 Improvements in or relating to wired broadcasting systems ZA787225B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB2572/78A GB1586543A (en)	1978-01-23	1978-01-23	Wired broadcasting systems

Publications (1)

Publication Number	Publication Date
ZA787225B true ZA787225B (en)	1979-12-27

Family

ID=9741939

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
ZA00787225A ZA787225B (en)	1978-01-23	1978-12-21	Improvements in or relating to wired broadcasting systems

Country Status (12)

Country	Link
JP (1)	JPS54116105A (xx)
AU (1)	AU4254878A (xx)
BE (1)	BE873611A (xx)
DE (1)	DE2900813A1 (xx)
ES (1)	ES476249A1 (xx)
FR (1)	FR2415404A1 (xx)
GB (1)	GB1586543A (xx)
IL (1)	IL56182A0 (xx)
IT (1)	IT1158175B (xx)
NL (1)	NL7900520A (xx)
SE (1)	SE7900540L (xx)
ZA (1)	ZA787225B (xx)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3013533A1 (de) *	1980-04-08	1981-10-15	Siemens Ag	Schaltungsanordnung mit einer laserdiode zur uebertragung von nachrichtensiglnalen ueber einen lichtwellenleiter
DE3224406A1 (de) *	1981-07-01	1983-01-20	Canon K.K., Tokyo	Bilduebertragungssystem
MY112412A (en) *	1993-10-14	2001-06-30	Nuchem Australia Pty Ltd	Multimedia enabled network.
GB2296169A (en) *	1994-12-14	1996-06-19	Metrovideo Ltd	Video transmission systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1306366A (xx) *	1969-05-22	1973-02-07
GB1486421A (en) *	1973-12-03	1977-09-21	Communications Patents Ltd	Broadcast relay systems
FR2271727A1 (en) *	1974-02-06	1975-12-12	Radio Diffusion Tv Francaise	Cable television distribution system - has separate return channel from subscriber on telephone line to reduce noise
DE2603644C3 (de) *	1976-01-30	1980-02-28	Siemens Ag, 1000 Berlin Und 8000 Muenchen	Gemeinschaftsantennenanlage

1978
- 1978-01-23 GB GB2572/78A patent/GB1586543A/en not_active Expired
- 1978-12-11 IL IL56182A patent/IL56182A0/xx unknown
- 1978-12-14 AU AU42548/78A patent/AU4254878A/en active Pending
- 1978-12-20 IT IT52382/78A patent/IT1158175B/it active
- 1978-12-21 ZA ZA00787225A patent/ZA787225B/xx unknown
- 1978-12-21 ES ES476249A patent/ES476249A1/es not_active Expired
1979
- 1979-01-11 DE DE19792900813 patent/DE2900813A1/de not_active Withdrawn
- 1979-01-16 FR FR7901454A patent/FR2415404A1/fr not_active Withdrawn
- 1979-01-22 SE SE7900540A patent/SE7900540L/xx unknown
- 1979-01-22 BE BE2057556A patent/BE873611A/xx unknown
- 1979-01-23 JP JP562179A patent/JPS54116105A/ja active Pending
- 1979-01-23 NL NL7900520A patent/NL7900520A/xx not_active Application Discontinuation

Also Published As

Publication number	Publication date
FR2415404A1 (fr)	1979-08-17
JPS54116105A (en)	1979-09-10
GB1586543A (en)	1981-03-18
AU4254878A (en)	1979-08-02
DE2900813A1 (de)	1979-07-26
BE873611A (fr)	1979-05-16
NL7900520A (nl)	1979-07-25
ES476249A1 (es)	1979-05-16
IT7852382A0 (it)	1978-12-20
IT1158175B (it)	1987-02-18
SE7900540L (sv)	1979-07-24
IL56182A0 (en)	1979-03-12

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