Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-01-28
1990-12-18
Sheppard, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 11, 358 12, 358140, H04N 704
Patent
active
049790412
ABSTRACT:
A high-definition television system in which a production signal is spatiotemporally filtered to remove frequency components and remaining components are transmitted over a channel. In various aspects, the filter produces a generally diamond-shaped frequency response in each of the spatial and spatiotemporal planes; the components selected for transmission are selected in accordance with the amount of motion in the image; the remaining components of image data are transmitted using double-sideband quadrature modulation; a high frequency component of the production signal shares the channel with additional data; and when the image data is transmitted using double-sideband quadrature modulation, baseband signals are derived from closely related areas of the image.
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Massachusetts Institute of Technology
Parker Michael D.
Sheppard John W.
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