Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-03-13
1990-05-22
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358909, H04N 514
Patent
active
049281780
ABSTRACT:
Apparatus for controlling a visual display unit from a video signal which is present for a first period of time such that an image corresponding to the signal can be displayed for one or more further such periods. The apparatus stores a digital representation of the video signal which is used to enable the required image to persist for the one or more further periods. The apparatus also generates during the first period a correction signal which is combined with the video signal and used to compensate for any imprecision in the stored signal. This arrangement permits the use of relatively small storage devices and relatively simple analogue-to-digital converters.
REFERENCES:
patent: 4792863 (1988-12-01), Urabe
"Hybrid-pulse coding: theoretical assessment of system"; BBC Research Department; No. 1969/40; Oct. 1969.
"Hybrid-pulse coding: experimental assessment of system as applied to video signals"; BBC Research Department; No. 1969/45; Nov. 1969.
"Hybrid-pulse coding; experimental equipment for tests with video signals"; BBC Research Department; No. 1969/46; Nov. 1969.
Eastman Kodak Company
Parker Michael D.
Shepperd John W.
Woods David M.
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