HDNTSC channel with frequency multiplexing

Details HDNTSC channel with frequency multiplexing HDNTSC channel with frequency multiplexing

1988-08-31

1990-12-11

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358142, H04N 704

Patent

active

049774549

ABSTRACT:
A high definition television encoder which provides an efficient use of bandwidth, segments line differential signals into left panel, center segment, and right panel line differential signals, and time expands the left and right panel line differential, panel, and luminance signals. The time corresponding expanded left and right panel line differential signals are arranged in time coincidence and quadrature modulated, as are the corresponding segments of the panel signals. The quadrature modulations providing signals in contiguous frequency bands. Luminance signals are converted to a band abutting the contiguous frequency bands as are digital stereo audio signals. Center segment line differential signals are time expanded to be consistent with conventional television horizontal line times and quadrature modulated with the television image signals to occupy a frequency band contiguous with the abutting and contiguous frequency bands.

REFERENCES:
patent: 4581640 (1986-04-01), Cole
patent: 4661850 (1987-04-01), Strolle
patent: 4670783 (1987-06-01), Nadar
Tsinberg, Mikhail, "ENTSC Two-Channel Compatible HDTV System", IEEE vol. CE-33 #3, 8/87.

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