ZA803471B - Combined wired broadcasting and viewphone system - Google Patents
Combined wired broadcasting and viewphone systemInfo
- Publication number
- ZA803471B ZA803471B ZA00803471A ZA803471A ZA803471B ZA 803471 B ZA803471 B ZA 803471B ZA 00803471 A ZA00803471 A ZA 00803471A ZA 803471 A ZA803471 A ZA 803471A ZA 803471 B ZA803471 B ZA 803471B
- Authority
- ZA
- South Africa
- Prior art keywords
- viewphone
- wired broadcasting
- combined wired
- combined
- broadcasting
- 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
- H04N7/173—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
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
- Small-Scale Networks (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7921335 | 1979-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA803471B true ZA803471B (en) | 1981-06-24 |
Family
ID=10505949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA00803471A ZA803471B (en) | 1979-06-19 | 1980-06-11 | Combined wired broadcasting and viewphone system |
Country Status (13)
Country | Link |
---|---|
US (1) | US4386365A (fr) |
JP (1) | JPS5619243A (fr) |
AU (1) | AU535400B2 (fr) |
BE (1) | BE883882A (fr) |
CA (1) | CA1147449A (fr) |
CH (1) | CH651162A5 (fr) |
DE (1) | DE3022359A1 (fr) |
ES (1) | ES8101830A1 (fr) |
FR (1) | FR2459590A1 (fr) |
IT (1) | IT1129012B (fr) |
NL (1) | NL8003541A (fr) |
SE (1) | SE448048B (fr) |
ZA (1) | ZA803471B (fr) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5819087A (ja) * | 1981-07-24 | 1983-02-03 | Pioneer Electronic Corp | Catvシステムにおけるデ−タ |
US4645872A (en) * | 1982-04-01 | 1987-02-24 | John Hopkins University | Videophone network system |
FR2543385B1 (fr) * | 1983-03-23 | 1985-07-12 | Telecommunications Sa | Reseau cable de videocommunication |
US4716585A (en) | 1985-04-05 | 1987-12-29 | Datapoint Corporation | Gain switched audio conferencing network |
US4710917A (en) * | 1985-04-08 | 1987-12-01 | Datapoint Corporation | Video conferencing network |
US4686698A (en) * | 1985-04-08 | 1987-08-11 | Datapoint Corporation | Workstation for interfacing with a video conferencing network |
US4893326A (en) * | 1987-05-04 | 1990-01-09 | Video Telecom Corp. | Video-telephone communications system |
US4849811A (en) * | 1988-07-06 | 1989-07-18 | Ben Kleinerman | Simultaneous audio and video transmission with restricted bandwidth |
US5014267A (en) * | 1989-04-06 | 1991-05-07 | Datapoint Corporation | Video conferencing network |
US5343240A (en) * | 1991-11-04 | 1994-08-30 | At&T Bell Laboratories | Bidirectional video telephony using shared channels on coaxial cable networks |
GB2263041B (en) * | 1991-12-30 | 1996-03-20 | Nynex Corp | System for integrated distribution of switched voice and television on coaxial cable and with video signal transmission originating from subscriber locations |
US5278889A (en) * | 1992-07-29 | 1994-01-11 | At&T Bell Laboratories | Video telephony dialing |
US5329308A (en) * | 1992-07-29 | 1994-07-12 | At&T Bell Laboratories | Bidirectional video telephony between cable television and switched telephone systems |
US5675373A (en) * | 1994-08-19 | 1997-10-07 | Marion County School Board | Interactive television service utilizing both unidirectional and omnidirectional broadcasting |
AU3486900A (en) | 1999-02-22 | 2000-09-14 | Terk Technologies Corp. | Video transmission system and method utilizing phone lines in multiple unit dwellings |
DE102013210381B3 (de) * | 2013-06-05 | 2014-05-28 | Siemens Aktiengesellschaft | Signalübertragung von und zu einer Lokalspule einer Magnetresonanzanlage |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1272594A (en) * | 1968-08-09 | 1972-05-03 | Communications Patents Ltd | Improvements in and relating to wired broadcasting systems |
GB1306367A (fr) * | 1969-06-06 | 1973-02-07 | ||
US3706996A (en) * | 1970-04-14 | 1972-12-19 | Theodore Hafner | Frequency adjustment for two-way video transmission |
GB1314457A (en) * | 1970-11-12 | 1973-04-26 | Communications Patents Ltd | Wired broadcasting systems |
GB1414127A (en) * | 1971-12-03 | 1975-11-19 | Communications Patents Ltd | Wired broadcasting systems |
-
1980
- 1980-06-02 US US06/155,076 patent/US4386365A/en not_active Expired - Lifetime
- 1980-06-04 AU AU59023/80A patent/AU535400B2/en not_active Ceased
- 1980-06-11 ZA ZA00803471A patent/ZA803471B/xx unknown
- 1980-06-11 SE SE8004343A patent/SE448048B/sv not_active IP Right Cessation
- 1980-06-13 ES ES492437A patent/ES8101830A1/es not_active Expired
- 1980-06-14 DE DE19803022359 patent/DE3022359A1/de not_active Withdrawn
- 1980-06-17 IT IT48999/80A patent/IT1129012B/it active
- 1980-06-17 CA CA000354211A patent/CA1147449A/fr not_active Expired
- 1980-06-18 CH CH4674/80A patent/CH651162A5/de not_active IP Right Cessation
- 1980-06-18 BE BE0/201080A patent/BE883882A/fr not_active IP Right Cessation
- 1980-06-18 NL NL8003541A patent/NL8003541A/nl not_active Application Discontinuation
- 1980-06-19 FR FR8013617A patent/FR2459590A1/fr active Granted
- 1980-06-19 JP JP8222480A patent/JPS5619243A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE3022359A1 (de) | 1981-01-29 |
CH651162A5 (de) | 1985-08-30 |
IT1129012B (it) | 1986-06-04 |
SE8004343L (sv) | 1980-12-20 |
FR2459590A1 (fr) | 1981-01-09 |
ES492437A0 (es) | 1980-12-16 |
SE448048B (sv) | 1987-01-12 |
BE883882A (fr) | 1980-10-16 |
NL8003541A (nl) | 1980-12-23 |
JPS5619243A (en) | 1981-02-23 |
CA1147449A (fr) | 1983-05-31 |
AU535400B2 (en) | 1984-03-22 |
US4386365A (en) | 1983-05-31 |
IT8048999A0 (it) | 1980-06-17 |
FR2459590B1 (fr) | 1984-11-30 |
ES8101830A1 (es) | 1980-12-16 |
AU5902380A (en) | 1981-01-08 |
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