Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-12-22
1991-09-03
Richardson, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 85, 358 86, 379 53, 364514, 364521, H04N 700
Patent
active
050459406
ABSTRACT:
The invention is a data pipeline system which synchronizes the display of digitzed audio and video data regardless of the speed at which the data was recorded on its linear medium. To do this, the video data is played at a constant speed, synchronized by the audio speed. Further, the invention uses a method of "staging" data in storage buffers, i.e., ring buffers, which encourages efficient use of the viewer module resources by not permitting the viewer to read excessive amounts of data at any one time, i.e., to read only enough data into any one ring buffer so that the amount of data in the ring buffer is roughly equivalent to the amount of data in the other ring buffers and yet permitting the viewer to read large enough chunks of data to promote efficient use of the fill system.
REFERENCES:
patent: 3609227 (1971-09-01), Kuljian
patent: 4698664 (1987-10-01), Nichols et al.
patent: 4882743 (1989-11-01), Mahmond
patent: 4949169 (1990-08-01), Lumelsky et al.
Peters Eric C.
Rabinowitz Stanley
Avid Technology Inc.
Richardson Robert L.
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