Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-03-05
1992-03-17
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358167, 358340, H04N 521, H04N 592
Patent
active
050973363
ABSTRACT:
A signal processing apparatus of this invention is an apparatus arranged to amplify a predetermined frequency component of an input signal on the basis of a predetermined amplification characteristic and then to output an amplified signal. This apparatus is arranged to separate a predetermined frequency component signal from an input signal; form a plurality of kinds of compressed signals by compressing the thus-separated signal on the basis of a plurality of kinds of compression characteristics which differ from one another; form a plurality of kinds of multiplied signals from the plurality of kinds of compressed signals; form an amplified signal, on the basis of the predetermined amplification characteristic, from the aforesaid input signal and the plurality of kinds of multiplied signals; and output the amplified signal. With this arrangement, it is possible to effect accurate amplification of the predetermined frequency component of the input signal on the basis of the predetermined amplification characteristic without being influenced by noise components.
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Canon Kabushiki Kaisha
Shepperd John W.
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