Compatible wide screen television system with variable image com

Details Compatible wide screen television system with variable image com Compatible wide screen television system with variable image com

1986-05-30

1988-03-08

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 11, 358 12, 358141, H04N 701, H04N 1120

Patent

active

047302151

ABSTRACT:
A compressor compresses the edges of a wide screen image to provide a compressed wide screen video signal which may be displayed on a conventional 4:3 aspect ratio receiver with the compressed edge portions largely hidden from view because of receiver overscan. Complementary edge expansion restores the compressed signal to its original form for display by a wide screen receiver. The relative proportions of compression applied to the left and right edges of the wide screen images are varied to reduce the appearance of edge distortion in the compressed signal when displayed on a standard aspect ratio receiver and to reduce the appearance of loss of edge resolution in the expanded signal when displayed on a wide screen receiver.

REFERENCES:
patent: 4134128 (1979-01-01), Hurst
patent: 4385324 (1986-05-01), Shioda et al.
patent: 4513324 (1985-04-01), Poetsch et al.
patent: 4551754 (1985-11-01), Meise et al.
patent: 4556906 (1985-12-01), Dischert et al.
patent: 4567508 (1986-01-01), Hulyer
patent: 4605952 (1986-08-01), Powers
patent: 4605962 (1986-08-01), Christopher et al.
patent: 4651208 (1987-03-01), Rhodes et al.
patent: 4672443 (1987-06-01), Dischert et al.

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