Method of and apparatus for facsimile communications
US5021890A · kind A · utility
13Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1989 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Mar 21, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/33307
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Stable facsimile communications and reduced deterioration in image quality are achieved, when standard facsimile apparatuses communicate using a communication network composed a subnetwork with relatively good transmission quality such as a wire system and a subnetwork with relatively bad transmission quality such a mobile system subnetwork, both subnetworks being interspersed between the facsimile apparatuses, by inserting a pair of FAX signal converting apparatuses into the communication channel between the facsimile apparatuses for error control responsive to the quality of the channel in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.