Progressive scan television system with interlaced inter-field s

Details Progressive scan television system with interlaced inter-field s Progressive scan television system with interlaced inter-field s

1986-01-31

1987-04-28

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358 12, 358135, 358136, H04N 701, H04N 1106, H04N 1114

Patent

active

046618503

ABSTRACT:
A progressively scanned video signal is encoded into temporal sum and difference components for transmission. The sum signal is temporally filtered, decimated and time expended to be compatible with interlaced receivers. The difference signal, also temporally filtered, decimated and time expanded, is conveyed via single or separate channels with the sum signal to a progressive scan receiver for reconstitution of the original progressive scan signal. Modified quadrature amplitude modulation is used to convey the sum and difference signals in a common channel.

REFERENCES:
patent: 4400719 (1983-08-01), Powers
patent: 4415931 (1983-11-01), Dischert
patent: 4429327 (1984-01-01), Oakley et al.
patent: 4523220 (1985-06-01), Adelsen et al.
patent: 4533951 (1985-08-01), Powers
patent: 4573068 (1986-02-01), Dorsey et al.

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