Compatible HDTV system employing nonlinear edge compression/expa

Details Compatible HDTV system employing nonlinear edge compression/expa Compatible HDTV system employing nonlinear edge compression/expa

1983-06-14

1986-08-12

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 12, H04N 1120, H04N 1104

Patent

active

046059520

ABSTRACT:
An HDTV television system is described for use in providing a compatible HDTV signal and an improved NTSC signal generated at a sample rate which conforms with the world studio standard. The system includes an HDTV camera and frame store. Two interlaced HDTV fields are stored in the HDTV frame store for further processing. The signals are supplied to two branched. In a first branch the samples from the frame store are anti-aliasing filtered, cropped and selected to generate a world-standard digital component source of an "improved" NTSC signal. In a second branch the samples from the HDTV frame store are aspect ratio compressed and scanned in a zig-zag pattern to generate an 11 MHz HDTV signal which is compatible with standard definition television receivers in use today.

REFERENCES:
patent: 3136847 (1964-06-01), Brown
patent: 3919474 (1975-11-01), Benson
patent: 4124871 (1978-11-01), Morrin, II
patent: 4161000 (1979-07-01), Cleveland
patent: 4298888 (1981-11-01), Colles et al.
patent: 4489350 (1984-12-01), Kimura
patent: 4541016 (1985-09-01), Ochi et al.
Television Technology in the 80's, "High Definition Television Studies on Compatible Basis with Present Standard", 1981, pp. 151-165 (Wendland).

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