Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-08-13
1992-07-07
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358140, H04N 704, H04N 701
Patent
active
051287919
ABSTRACT:
A filter bank comprising first and second finite impulse response diamond-shaped filters with finite precision filter coefficients is used to convert a high definition progressive video sequence in a vertical-time representation into an interlaced sequence and a deinterlacing sequence. The interlaced sequence may be used by a low resolution television receiver to display a low resolution television image. The interlaced and deinterlacing sequences may be recombined to perfectly reconstruct the progressive high definition video sequence which then may be used by a high definition television receiver. Thus, the inventive system has the advantage that it enables a single high definition video sequence to be utilized by both high definition television equipment and lower resolution television equipment so that an existing base of consumer television equipment is not rendered obsolete by the introduction of a high definition television sequence.
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LeGall Didier J.
Vetterli Martin
Baskerville Loria J.
Bell Communications Research Inc.
Groody James J.
Lee Michael H.
Suchyta Leonard Charles
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