Signal processing system

Details Signal processing system Signal processing system

1997-04-10

1999-11-09

Britton, Howard

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348426, H04N 5208, H04N 964

Patent

active

059824557

ABSTRACT:
An image processing system 20 comprises a format converter 21 for receiving a first signal having a larger bandwidth and a second signal having a smaller bandwidth, the first and second signals together representing an image. A processor 23 is arranged to process the first and second signals to produce signals representing a manipulated version of the image. The system further comprises a deriving circuit 25 which is arranged to derive from information in the larger bandwidth signal additional information for the smaller bandwidth signal. The deriving circuit derives an unknown value of a pixel as represented by the smaller bandwidth signal from known values of the pixel and the pixels adjacent thereto as represented by the larger bandwidth signal and from known values of the adjacent pixels as represented by the smaller bandwidth signal. The deriving circuit facilitates conversion of the first and second signals into another signal format representing the image.

REFERENCES:
patent: 3778543 (1973-12-01), Lowry
patent: 4514818 (1985-04-01), Walker
patent: 4553157 (1985-11-01), Hurst
patent: 4739395 (1988-04-01), Johanndeiter et al.
patent: 5077603 (1991-12-01), Macovski
patent: 5479216 (1995-12-01), Reime
patent: 5515112 (1996-05-01), Penney

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