Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1984-05-29
1986-11-04
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 12, H04N 700, H04N 712
Patent
active
046212868
ABSTRACT:
The image represented by a video signal contains an associated image spectrum defined within a spatial-temporal frequency volume. From this video signal, a second video signal is produced that represents spatial-temporal carrier modulation of a spectral section of the image spectrum into an interleaved location adjacent the image spectrum. To reduce the visibility of aliasing artifacts, the interleaved spectral section is made to be of reduced amplitude relative to its original amplitude in the image spectrum. To reconstruct the spatial-temporal frequency spectrum of the image at the television receiver, the video signal containing the frequency interleaved spectrum is processed in a complementary manner that represents spatial-temporal carrier modulation of the interleaved section to restore that section to its original position in the image spectrum. At the same time, the amplitude of the restored section is increased.
REFERENCES:
patent: 2686831 (1954-08-01), Dome
patent: 2716151 (1955-08-01), Smith
patent: 3871019 (1975-03-01), Bingham
B. Wendland, "High Definition Television Studies on Compatible Basis with Present Standards", SMPTE's-Television Technology in the 80s-1981.
Journal, SMPTE, Oct. 1984, "Experiments on Proposed Extended-Definition TV with Full NTSC Compatibility", by T. Fukinuki, et al, pp. 923-929.
Carlson Curtis R.
Reitmeier Glenn A.
Laks Joseph J.
Rasmussen Paul J.
RCA Corporation
Shepperd John W.
Whitacre Eugene M.
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