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GB2006574A - Method of and Device for Jointly Transmitting Telephone and Video Signals on Digital Telephone Lines - Google Patents

Method of and Device for Jointly Transmitting Telephone and Video Signals on Digital Telephone Lines

Info

Publication number
GB2006574A
GB2006574A GB7839748A GB7839748A GB2006574A GB 2006574 A GB2006574 A GB 2006574A GB 7839748 A GB7839748 A GB 7839748A GB 7839748 A GB7839748 A GB 7839748A GB 2006574 A GB2006574 A GB 2006574A
Authority
GB
United Kingdom
Prior art keywords
telephone
octets
video signals
bits
video
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.)
Granted
Application number
GB7839748A
Other versions
GB2006574B (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.)
Telecom Italia SpA
Original Assignee
CSELT Centro Studi e Laboratori Telecomunicazioni SpA
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 CSELT Centro Studi e Laboratori Telecomunicazioni SpA filed Critical CSELT Centro Studi e Laboratori Telecomunicazioni SpA
Publication of GB2006574A publication Critical patent/GB2006574A/en
Application granted granted Critical
Publication of GB2006574B publication Critical patent/GB2006574B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/064—Data transmission during pauses in telephone conversation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Television Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

A method and a device for jointly transmitting telephone and video signals on digital telephone lines, wherein before transmission the octets of bits which are not utilized for any call in a frame sequence of PCM signals corresponding to a plurality of telephone calls are identified (RI), the bits of a video transmission signal are temporaneously memorized (B1) and then inserted into the non-utilized octets; and after transmission, the octets of bits relating to telephone calls and octets relating to at least one video transmission signal, are separated (RR) and the bits of the octets relating to the video transmission signal temporaneously memorized (B2) so as to reconstruct the continuity of the video transmission signal. The transmission of video signals may be accomplished over a single or a plurality of telephone lines. <IMAGE>
GB7839748A 1977-10-20 1978-10-09 Method of and device for jointly transmitting telephone and video signal on digitaltelephone lines Expired GB2006574B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT69348/77A IT1091286B (en) 1977-10-20 1977-10-20 PROCEDURE AND DEVICE FOR JOINT TRANSMISSION OF TELEPHONE SIGNALS AND VIDEO SIGNALS ON NUMERICAL TELEPHONE LINES

Publications (2)

Publication Number Publication Date
GB2006574A true GB2006574A (en) 1979-05-02
GB2006574B GB2006574B (en) 1982-02-10

Family

ID=11311934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839748A Expired GB2006574B (en) 1977-10-20 1978-10-09 Method of and device for jointly transmitting telephone and video signal on digitaltelephone lines

Country Status (6)

Country Link
JP (1) JPS5821460B2 (en)
DE (1) DE2845023C2 (en)
FR (1) FR2406920A1 (en)
GB (1) GB2006574B (en)
IT (1) IT1091286B (en)
SE (1) SE439564B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021145B1 (en) * 1979-06-29 1983-11-23 International Business Machines Corporation Message multiplexing arrangement in a digital data communication system
GB2154398A (en) * 1984-02-17 1985-09-04 Nec Corp Multiplexing system
US4545048A (en) * 1980-11-27 1985-10-01 Licentia Patent-Verwaltungs-Gmbh Service integrated digital transmission system
GB2162022A (en) * 1984-07-17 1986-01-22 Stc Plc Data transmission system
EP0082333B1 (en) * 1981-12-17 1986-03-05 International Business Machines Corporation Interleaved digital data and voice communications system and method
EP0257168A1 (en) * 1986-08-27 1988-03-02 International Business Machines Corporation Pseudo synchronous transportation apparatus in a communication network
EP0258514A1 (en) * 1986-08-27 1988-03-09 International Business Machines Corporation Optimized bandwidth allocation apparatus between circuit slots and packet bit stream in a communication network
GB2294614A (en) * 1994-10-28 1996-05-01 Int Maritime Satellite Organiz Communication method and apparatus for providing data communication in addition to voice

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62144658U (en) * 1986-03-07 1987-09-11
JPS637047A (en) * 1986-06-27 1988-01-12 Nec Corp Multimedia cummunication method and its transmitter/ receiver
JPH0639490U (en) * 1992-11-02 1994-05-27 谷川商事株式会社 Writing instrument having a seal and a correction stamp
FI103700B (en) 1994-09-20 1999-08-13 Nokia Mobile Phones Ltd Simultaneous transmission of voice and data in mobile telecommunication systems
JP3043348U (en) * 1997-05-12 1997-11-18 清二 大田 Stamp with correction stamp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2157143A5 (en) * 1971-10-19 1973-06-01 Queffeulou Jean Yves
JPS5232804B2 (en) * 1972-09-04 1977-08-24
CH577253A5 (en) * 1974-05-17 1976-06-30 Ibm

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021145B1 (en) * 1979-06-29 1983-11-23 International Business Machines Corporation Message multiplexing arrangement in a digital data communication system
US4545048A (en) * 1980-11-27 1985-10-01 Licentia Patent-Verwaltungs-Gmbh Service integrated digital transmission system
EP0082333B1 (en) * 1981-12-17 1986-03-05 International Business Machines Corporation Interleaved digital data and voice communications system and method
GB2154398A (en) * 1984-02-17 1985-09-04 Nec Corp Multiplexing system
GB2162022A (en) * 1984-07-17 1986-01-22 Stc Plc Data transmission system
EP0257168A1 (en) * 1986-08-27 1988-03-02 International Business Machines Corporation Pseudo synchronous transportation apparatus in a communication network
EP0258514A1 (en) * 1986-08-27 1988-03-09 International Business Machines Corporation Optimized bandwidth allocation apparatus between circuit slots and packet bit stream in a communication network
US4799219A (en) * 1986-08-27 1989-01-17 International Business Machines Corp. Pseudo synchronous transport mechanism in a communication network
US4819230A (en) * 1986-08-27 1989-04-04 International Business Machines Corp. Optimized bandwith allocation mechanism between circuit slots and packet bit stream in a communication network
GB2294614A (en) * 1994-10-28 1996-05-01 Int Maritime Satellite Organiz Communication method and apparatus for providing data communication in addition to voice
GB2294614B (en) * 1994-10-28 1999-07-14 Int Maritime Satellite Organiz Communication method and apparatus
US6393000B1 (en) 1994-10-28 2002-05-21 Inmarsat, Ltd. Communication method and apparatus with transmission of a second signal during absence of a first one

Also Published As

Publication number Publication date
SE439564B (en) 1985-06-17
IT1091286B (en) 1985-07-06
FR2406920A1 (en) 1979-05-18
DE2845023C2 (en) 1982-09-09
GB2006574B (en) 1982-02-10
JPS5462706A (en) 1979-05-21
FR2406920B1 (en) 1982-04-16
SE7810581L (en) 1979-04-21
JPS5821460B2 (en) 1983-04-30
DE2845023A1 (en) 1979-05-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee