Facsimile transceiver utilizing orthogonal conversion
US4620233A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1982 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Dec 29, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0468
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scanning array (12) comprising a plurality of photosensor elements (12a) is reciprocated perpendicular to the axis (12b) thereof to scan a rectangular area of an original document (69). After scanning the area, the document (69) is moved parallel to the axis (12b) of the scanning array (12) and the scanning array (12) reciprocated again to scan a next rectangular area. This process is continued until the entire document (69) is scanned. The photosensor elements (12a) produce data signals corresponding to incident light from the document (69) which are fed serially into an orthogonal conversion memory (26) in the column direction. The data signals are read out of the memory (26) in the row direction and run length encoded for transmission. Received data signals are run length decoded and fed into the memory (26) in the row direction and read out of the memory (26) in the column direction. The received data signals are then applied to a printing array (24) of printing elements (24a) which is reciprocated relative to a sheet of paper (78) in the same pattern as the scanning array (12) to reproduce an image represented by the received data signals. The data signals are subjected to o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.