Telegraphy – Systems – Simplex-reversing periodic
Patent
1975-02-03
1976-09-21
Griffin, Robert L.
Telegraphy
Systems
Simplex-reversing periodic
178 56, 178 58R, 178DIG3, 178DIG23, 179 2TV, H04N 546, H04N 718
Patent
active
039820637
ABSTRACT:
Alternate lines of a 526 line video signal are time-stretched and transmitted over a transmission channel of limited bandwidth. At the receiver, the lines are compressed back to their original duration and displayed in an interlaced manner on a conventional receiver by blanking alternate lines in each field. In another embodiment of the invention, adjacent transmitted lines of the video signal are averaged at the receiver and the resultant signals are substituted for the non-transmitted lines of the video signal.
REFERENCES:
patent: 3806644 (1974-04-01), Browne et al.
M. C. W. van Buul & L. J. van de Polder, "Standards Conversion of a T.V. Signal", Philips Research Reports, Vol. 28, 8-73, pp. 377-390.
Brown Earl Franklin
Eilenberger Robert Lewis
Gordon Alan Mayer
Gordon Pat Le Mar
Limb John Ormond
Bell Telephone Laboratories Incorporated
Coles Edward L.
Griffin Robert L.
Sheffield Bryan W.
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