Picture signal processor for performing both large area and smal

Details Picture signal processor for performing both large area and smal Picture signal processor for performing both large area and smal

1993-08-19

1994-09-20

Powell, Mark R.

Television

Image signal processing circuitry specific to television

Gray scale transformation

348678, H04N 552

Patent

active

053493907

ABSTRACT:
A picture signal processor providing a contrast reduced picture signal, which includes a first contrast reduction device (MUL-R1, D5, CA1) receiving a picture signal (R-in) for providing a first contrast reduced picture signal (R), the first contrast reduction device only reduces the contrast of the picture signal (R-in) when the picture signal (R-in) exceeds a given first threshold (95%) for relatively large areas, while the picture signal processor further includes a second contrast reduction device (MUL-R2, D8, CA2), which is coupled to the first contrast reduction device (MUL-R1, D5, CA1) and which provides the contrast reduced picture signal by immediately reducing the contrast of a too bright part of the first contrast reduced picture signal (R) as soon and as long as an instantaneous amplitude of the first contrast-reduced picture signal (R) exceeds a given second threshold (100%).

REFERENCES:
patent: 4081838 (1978-03-01), Wheeler
patent: 4204229 (1980-05-01), Heuze
patent: 4302777 (1981-11-01), Kemner et al.
patent: 4710815 (1987-12-01), Douglas et al.
patent: 4712132 (1987-12-01), Soca
patent: 4883991 (1989-11-01), Kroner et al.
patent: 4989074 (1991-01-01), Matsumoto
patent: 5014130 (1991-05-01), Heister et al.
patent: 5191407 (1993-03-01), Kawano et al.
patent: 5204748 (1993-04-01), Lagoni
patent: 5245434 (1993-09-01), Gurley
TDA 4680, "Die Video-Prozessor-Schaltung TDA 4680, Technische Information 900503".

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