Driving equipment for multi-gradation level reproduction

Details Driving equipment for multi-gradation level reproduction Driving equipment for multi-gradation level reproduction

1981-02-02

1983-01-11

Britton, Howard

Facsimile and static presentation processing

Facsimile

Recording apparatus

346 76PH, 358241, 358298, 364515, H04N 140

Patent

active

043684912

ABSTRACT:
An input picture signal is converted, for each picture element, into a K-bit, first time-serial signal having "ls" corresponding in number to the gradation level of the picture element, and the first time-serial signal are written in a random access memory, sequentially updating its column addresses upon every writing of K bits in its column direction. The random access memory is read out, updating its row addresses upon every reading out of M bits in the row direction. A second time-serial signal thus read out from the random access memory is subjected to a serial-parallel conversion by steps of M bits and parallel outputs of the M bits are supplied to recording elements respectively corresponding thereto.

REFERENCES:
patent: 3609294 (1971-09-01), Cady
patent: 4071849 (1978-01-01), Koyano
patent: 4074319 (1978-02-01), Goldschmidt
patent: 4240118 (1980-12-01), Wellendorf

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