Multiplier carrying out numeric calculation at high speed

Details Multiplier carrying out numeric calculation at high speed Multiplier carrying out numeric calculation at high speed

1995-06-05

1997-09-09

Ngo, Chuong D.

Boots, shoes, and leggings

36474801, 364757, G06F 738, G06F 752

Patent

active

056663013

ABSTRACT:
Luminance value data including data of R, G, and B and data .alpha. representing transparency, each of 8 bits, and a coefficient expressed by floating-point data are directly applied to an operation unit. The operation unit includes four 8.times.8 bit multiply unit for multiplying 8-bit data of each component forming the luminance value data by the most significant 8 bits of data of the mantissa of the coefficient. An output of each of the multiply units is shifted by corresponding shifters, whereby data of 8 bits is output for each component. Luminance value data of a format identical to that provided is output from the operation unit. Thus, a multiplier is provided having the operation unit that can carry out luminance calculation at high speed.

REFERENCES:
patent: 4594679 (1986-06-01), George et al.
patent: 4953119 (1990-08-01), Wong et al.
patent: 4985848 (1991-01-01), Pfeiffer et al.
patent: 5185713 (1993-02-01), Kobunaya
patent: 5268854 (1993-12-01), Ikumi
"Graphics Processing with the 88110 RISC Microprocessor", Julie Shipnes, 1992 IEEE.

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