Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-03-27
1990-04-10
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358138, H04N 712
Patent
active
049165372
ABSTRACT:
An image information signal transmitting system according to the present invention is structured in such a manner that an image information signal composed of a plurality of picture element data corresponding to one picture is stored in units of blocks each of which is composed of a predetermined number of picture element data, the image information signal composed of a plurality of picture element data corresponding to one picture is divided into the blocks, and picture element data is extracted from the thus-divided blocks by a number smaller than the number of picture element data forming the block, and the extracted picture element is stored in units of corresponding blocks. Furthermore, the image information signal composed of a plurality of picture element data corresponding to one picture is divided into the blocks, and a transmission mode for the picture element data forming each of the blocks is determined among a plurality of transmission modes having different numbers of picture element data transmitted, a reading address which corresponds to a block determined to be transmitted in a transmission mode having the greatest number of picture element data transmitted, discrimination data for discriminating an address corresponding to an end portion in each horizontal line direction of a picture from other reading addresses is generated, and stored picture element data is read out so that image information signals can be stably transmitted without any deterioration in the image quality.
REFERENCES:
patent: 4703348 (1987-10-01), Yuasa et al.
patent: 4755878 (1988-07-01), Nakayama et al.
patent: 4797741 (1989-01-01), Sato et al.
Ishikawa Hisashi
Kozuki Susumu
Nagasawa Kenichi
Nakayama Tadayoshi
Sasatani Tomohiko
Canon Kabushiki Kaisha
Groody James J.
Kostak Victor R.
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