Facsimile and static presentation processing – Facsimile – Document filing and retrieval system
Patent
1990-03-29
1991-11-26
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Document filing and retrieval system
358426, 358444, H04N 100
Patent
active
050687450
ABSTRACT:
Image signals are subjected to a first signal compression processing which is carried out with a small factor of compression. The compressed image signals, which are obtained from the first signal compression processing, are recorded on a first recording medium. When a predetermined period has elapsed after a compressed image signal obtained from the first signal compression processing was recorded on the first recording medium, or when the frequency with which the compressed image signal is read from the first recording medium has become lower than a predetermined value, the compressed image signal is read out from the first recording medium. The image signal, which has been read out from the first recording medium, is subjected to a second signal compression processing which is carried out with a large factor of compression. The compressed image signal, which is obtained from the second signal compression processing, is recorded on a second recording medium. Thereafter, the compressed image signal, for which the predetermined period has elapsed after it was recorded on the first recording medium or for which the frequency has become lower than the predetermined value, is erased from the first recording medium.
REFERENCES:
patent: 4264808 (1981-04-01), Owens et al.
patent: 4303948 (1981-12-01), Arai et al.
patent: 4587633 (1986-05-01), Wang et al.
patent: 4591997 (1986-05-01), Grabel
Coles Sr. Edward L.
Fuji Photo Film Co. , Ltd.
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