Interpolator for facsimile bandwidth compression
US3974325A · kind A · utility
7Cited by
8References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1974 |
| Grant date | Aug 10, 1976 |
| Priority date | — |
| Expiry date | Oct 21, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/411
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a facsimile transmission device, means for reducing the bandwidth which includes a clock rate halving flip-flop and an odd-even line switching flip-flop which are logically combined to transmit every second data bit in each line in a vertical stagger between lines. At the receiving end the missing bits are filled in by an interpolation device according to the data in the vertically adjacent bits or the horizontally adjacent bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.