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 LinesInfo
- 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
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
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>
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)
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)
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 |
FI103700B1 (en) | 1994-09-20 | 1999-08-13 | Nokia Mobile Phones Ltd | Simultaneous transmission of voice and data in a mobile communication system |
JP3043348U (en) * | 1997-05-12 | 1997-11-18 | 清二 大田 | Stamp with correction stamp |
Family Cites Families (3)
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 |
-
1977
- 1977-10-20 IT IT69348/77A patent/IT1091286B/en active
-
1978
- 1978-10-09 FR FR7828757A patent/FR2406920A1/en active Granted
- 1978-10-09 JP JP53123717A patent/JPS5821460B2/en not_active Expired
- 1978-10-09 GB GB7839748A patent/GB2006574B/en not_active Expired
- 1978-10-10 SE SE7810581A patent/SE439564B/en unknown
- 1978-10-16 DE DE2845023A patent/DE2845023C2/en not_active Expired
Cited By (12)
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 |
---|---|
JPS5821460B2 (en) | 1983-04-30 |
DE2845023C2 (en) | 1982-09-09 |
JPS5462706A (en) | 1979-05-21 |
GB2006574B (en) | 1982-02-10 |
SE7810581L (en) | 1979-04-21 |
SE439564B (en) | 1985-06-17 |
IT1091286B (en) | 1985-07-06 |
DE2845023A1 (en) | 1979-05-03 |
FR2406920B1 (en) | 1982-04-16 |
FR2406920A1 (en) | 1979-05-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |