Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-08-22
1990-11-20
Peng, John K.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358135, 358105, H04N 718, H04N 712
Patent
active
049722603
ABSTRACT:
An apparatus for coding a moving-picture signal comprises a first memory temporarily memorizing an input picture signal of one frame. A block of the picture signal, which corresponds to a central portion of the frame, is firstly read out from the first memory and then other blocks of the picture signal are sequentially read out from the first memory in a predetermined order. Each of the blocks of the picture signal has a predetermined number of adjacent pixels. A transform device transforms each block of the picture signal read out from the first memory into transmission information. A second memory stores the transmission information and has a capacity which adaptively varies with a position of the block relative to the frame. A quantizer adaptively quantizes an output from the transform device in accordance with a quantity of the transmission information stored in the second memory and with the position of the block relative to the frame.
REFERENCES:
patent: 4668987 (1987-05-01), Matsuda et al.
patent: 4672444 (1987-06-01), Bergen et al.
patent: 4689672 (1987-08-01), Furukawa et al.
patent: 4734767 (1988-03-01), Kaneko et al.
patent: 4809067 (1989-02-01), Kikuchi et al.
patent: 4837632 (1989-06-01), Kubo et al.
patent: 4894713 (1990-01-01), Delogne et al.
"Advances in Image Processing", SPIE vol. 804, pp. 385-394, 1987.
"Description of Ref. Model 5 (RM5)", CCITT SGXV, Document #339, Mar. 1988.
"Line Transmission of Non-Telephone Signals"; "Transmission of Sound-Programme and Television Signals", CCITT, Red Book, vol. III, Fascicle III.4 Oct., 1984.
Fujikawa Wataru
Matsuya Satoshi
Tanaka Akiyoshi
Matsushita Electric - Industrial Co., Ltd.
Peng John K.
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