Digital video scaling engine

Details Digital video scaling engine Digital video scaling engine

1996-12-20

1998-11-17

Britton, Howard

Television

Image signal processing circuitry specific to television

Special effects

348222, 382298, G06F 1566, H04N 5262

Patent

active

058383875

ABSTRACT:
A video scaling engine for scaling video data over a plurality of clock cycles is disclosed. In a first clock cycle of the plurality of clock cycles, a multiplier of the video scaling engine multiplies an input pixel by a coefficient indicated by a coefficient select signal to generate a first product. The first product is stored in an accumulator of the video scaling engine. In a second clock cycle of the plurality of clock cycles, the multiplier multiplies another input pixel by a coefficient indicated by another coefficient select signal to generate a second product. The second product is added to the contents of the accumulator to produce a sum including the first and second products. The sum including the first and second products is stored in the accumulator and then divided by a value based on at least one of the coefficients to produce a scaled output pixel.

REFERENCES:
patent: 4797751 (1989-01-01), Yamaguchi
patent: 5402513 (1995-03-01), Schafer
patent: 5574572 (1996-11-01), Malinowski
patent: 5594495 (1997-01-01), Palmer
patent: 5710573 (1998-01-01), Hung

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