Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-02-02
1991-04-23
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 12, H04N 704
Patent
active
050104055
ABSTRACT:
A television encoder for generating a receiver-compatible signal from a production video signal containing enhancement information which cannot be displayed on a standard receiver, the receiver-compatible signal being compatible with the standard receiver, the encoder including a filter bank for dividing the video signal into at least two groups of spatial frequency components including a first group and a second group, the first group containing members which when combined together form a standard video signal which is displayed by the standard receiver and the second group containing the enhancement information; a quantizer for quantizing at least one member of the first group; a combiner for adding at least one member of the second group to a quantized member of the first group to produce a modified first group; and a synthesizer for combining the members of the modified first group to generate the receiver-compatible signal.
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patent: 4521803 (1985-06-01), Gittinger
P. P. Vaidyanathan, "Quadrature Mirror Filter Banks, M-Band Extensions and Perfect-Reconstruction Techniques", IEEE ASSP Magazine, Jul. 1987, pp. 4-20.
Lawrence Gilman Roberts, "Picture Coding Using Pseudo-Random Noise", IRA Transactions on Information Theory, Feb. 1962, pp. 145-154.
W. F. Schreiber et al., "Channel-Compatible 6-MHz HDTV Distribution Systems", SMPTE Nashville, Jan. 29, 1988.
W. F. Schreiber, "Reliable Television Transmission Through Analog Channels", U.S. patent application Ser. No. 257,402.
W. F. Schreiber, "Adaptive Frequency Modulation", U.S. patent application Ser. No. 061,450.
W. F. Schreiber, "Improved Definition Systems", U.S. patent application Ser. No. 149,673.
"Experiments on Proposed Extended-Definition TV with Full NTSC Compatibility", by Fukinuki et al., SMPTE Journal, Oct. 1984, pp. 923-929.
Adelson Edward H.
Lippman Andrew B.
Netravali Aran N.
Schreiber William F.
Massachusetts Institute of Technology
Parker Michael D.
Shepperd John W.
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