Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1990-03-19
1992-09-15
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358133, 358136, H04N 704, H04N 712
Patent
active
051482746
ABSTRACT:
A high definition television system that is characterized by low transmission bandwidth is achieved by removing redundancies in the signal, encoding the remaining signals, and transmitting the encoded signal in a manner that is most compatible with the applicable standards. The dynamic range of the encoded signal is reduced by combining groups of adjacent samples that are smaller than a "floor" threshold to form larger samples, and by splitting samples that are larger than a "ceiling" threshold to form a plurality of smaller samples. Encoding of the combined samples is carried out in a conforming manner to minimize deleterious effects of transmission noise.
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Knauer Scott C.
Netravali Arun N.
Petajan Eric D.
Westerink Peter H.
AT&T Bell Laboratories
Brendzel Henry T.
Groody James J.
Metjahic Safet
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