Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1988-02-19
1989-09-12
Shepperd, John W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358147, H04N 708, H04N 7087, H04N 7093
Patent
active
048665223
ABSTRACT:
A component television signal is transmitted as a sequence of television frames with each frame having a plurality of television lines substantially all of which have first and second time multiplexed portions. The first portion (DB) forms the data burst and conveys sound/data information in digital form at a given bit rate while the second portion of each line outside the vertical blanking intervals (VBI) conveys vision information (U/V, Y). The second portion of at least some of the lines in the verical blanking intervals (VBI) convey additional information in digital form at a higher bit rate than the given bit rate and which may be twice the given bit rate. This additional information can be the digital channel information for a digitally assisted television signal.
REFERENCES:
patent: 4134127 (1979-01-01), Campioni
patent: 4614974 (1986-09-01), Maney et al.
patent: 4633313 (1986-12-01), Mogi et al.
Storey, HDTV Motron Adaptive Bandwidth Reduction Using DATV, BBC Report BBCRD 1986/Jun. 5, 1986.
Specification of the Systems of the MAC/Packet Family, Tech. 3258E European Broadcasting Union, Oct. 1986.
Marion Michael E.
Shepperd John W.
U.S. Philips Corporation
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