Facsimile system of run-length
US3941922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1973 |
| Grant date | Mar 2, 1976 |
| Priority date | — |
| Expiry date | Nov 13, 1993 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/419
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A transmitter for a facsimile system of run-length type, which comprises a facsimile signal generator, a pulse generator for producing a sampling pulse train, a sampler for sampling each of the space and mark signals with the sampling pulse train, and a coder for converting the sampled space and mark signals into successive binary code signals, the coder including at least two counters and means for selectively operating the two counters. A receiver for facsimile system of run-length type, which comprises a timing pulse generator for producing timing pulses, a demodulator for demodulating modulated binary code signals, a decoder for decoding the binary code signals into binary codes each representing a run-length of one of mark and space signals, a memory circuit for memorizing the binary codes, said memory circuit including at least two registers and means for selectively operating the two registers, and a reconverting circuit for reconverting the binary codes from the memory circuit into one of the mark and space signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.