GB9028152D0 - A signal transmission device - Google Patents

A signal transmission device

Info

Publication number
GB9028152D0
GB9028152D0 GB909028152A GB9028152A GB9028152D0 GB 9028152 D0 GB9028152 D0 GB 9028152D0 GB 909028152 A GB909028152 A GB 909028152A GB 9028152 A GB9028152 A GB 9028152A GB 9028152 D0 GB9028152 D0 GB 9028152D0
Authority
GB
United Kingdom
Prior art keywords
transmission device
signal transmission
signal
transmission
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.)
Withdrawn
Application number
GB909028152A
Other versions
GB2239581A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
Gold Star Co 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.)
Filing date
Publication date
Application filed by Gold Star Co Ltd filed Critical Gold Star Co Ltd
Publication of GB9028152D0 publication Critical patent/GB9028152D0/en
Publication of GB2239581A publication Critical patent/GB2239581A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C15/00—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
    • G08C15/02—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path simultaneously, i.e. using frequency division
    • G08C15/04—Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path simultaneously, i.e. using frequency division the signals being modulated on carrier frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/025—Door telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H04B3/548—Systems for transmission via power distribution lines the power on the line being DC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H04N7/186—Video door telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/5437—Wired telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5429—Applications for powerline communications
    • H04B2203/545—Audio/video application, e.g. interphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/547—Systems for power line communications via DC power distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5483—Systems for power line communications using coupling circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2203/00—Indexing scheme relating to line transmission systems
    • H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
    • H04B2203/5462—Systems for power line communications
    • H04B2203/5491—Systems for power line communications using filtering and bypassing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
GB9028152A 1989-12-28 1990-12-28 Door phone transmits image, voice, sync and power down same line Withdrawn GB2239581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019890019911A KR940000250B1 (en) 1989-12-28 1989-12-28 Signal transmitting device of door phone

Publications (2)

Publication Number Publication Date
GB9028152D0 true GB9028152D0 (en) 1991-02-13
GB2239581A GB2239581A (en) 1991-07-03

Family

ID=19293973

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9028152A Withdrawn GB2239581A (en) 1989-12-28 1990-12-28 Door phone transmits image, voice, sync and power down same line

Country Status (4)

Country Link
JP (1) JPH04140953A (en)
KR (1) KR940000250B1 (en)
DE (1) DE4042088A1 (en)
GB (1) GB2239581A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69222796T3 (en) * 1991-03-19 2002-04-18 Bitron Spa System for assembling an external call unit for an audio and / or video building intercom
US5736980A (en) * 1994-04-28 1998-04-07 Sharp Kabushiki Kaisha Coordinate inputting apparatus with shared line combinations of power, position and switch signals
ES2107942B1 (en) * 1994-12-30 1998-07-01 Grajirena Javier Gorrochategui MONITOR INSTALLATION SYSTEM IN VIDEO DOOR ENTRIES.
DE29505587U1 (en) * 1995-04-07 1995-06-14 Paschke, Christian, 86368 Gersthofen Video transmission system for operating lights
DE19512689A1 (en) * 1995-04-07 1996-10-10 Christian Paschke Combined video camera control signal and operating theatre lighting supply feed system
DE19523377C1 (en) * 1995-04-07 1996-08-14 Heraeus Med Gmbh Transmitting video signals for use with lamp assembly in operating theatre
KR100477579B1 (en) * 2002-10-10 2005-03-18 서울통신기술 주식회사 Home automation for improving display-image
DE502005003268D1 (en) * 2004-05-24 2008-04-30 Peter Fry Door intercom system with low-installation home intercoms
DE102007046636B4 (en) * 2007-09-27 2011-05-05 Lear Corporation Gmbh Method and device for transmitting audio signals to the transmitting diodes of an audio signal infrared transmitting unit
ITRN20110058A1 (en) * 2011-08-11 2011-11-10 G I A Servizi S R L REMOTE CONTROL DEVICE FOR SIMULTANEOUS TRANSMISSION OF MULTIPLE SIGNALS WITH POWERLINE TECHNOLOGY.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534161A (en) * 1966-01-24 1970-10-13 Gordon A Friesen Intern Inc Television communication systems
IT976190B (en) * 1971-12-31 1974-08-20 Kathrein Werke Kg SYSTEM FOR THE TRANSMISSION OF SIGNALS ON SIGNALING LINES INSTALLED IN BUILDINGS
EP0039385A3 (en) * 1980-02-08 1981-12-02 FALCONI COSTRUZIONI IMPIANTI S.p.A. Transmission of video and other signals and also of a return message by a single unshielded two-wire cable
GB8606881D0 (en) * 1986-03-20 1986-04-23 Musical Electronics Ltd Video distribution system
AU4404689A (en) * 1988-10-13 1990-05-01 International Media Communications Plc Signal transmission
GB2225195B (en) * 1988-11-19 1993-08-11 Matsushita Electric Works Ltd Two-wire television interphone system

Also Published As

Publication number Publication date
JPH04140953A (en) 1992-05-14
GB2239581A (en) 1991-07-03
KR940000250B1 (en) 1994-01-12
KR910013025A (en) 1991-08-08
DE4042088A1 (en) 1991-07-11

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)