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US 5,497,436 AGranted
System and method for bit-masked color signal scaling
AssigneeApple Computer, Inc.
InventorGavin S. P. Miller
Life of this patent
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AssigneeApple Computer, Inc.
InventorGavin S. P. Miller
Estimating the term…
A system for bit-masked color signal scaling comprises a processing unit, a display device, and a memory wherein a scaling unit, an image memory, a multiplication image memory, an approximation image memory, an approximation multiplication image memory, and a scaled image memory reside. The scaling unit retrieves a color signal having a red channel signal, a green channel signal, and a blue channel signal from the image memory, and performs either an exact or an approximate bit-masked color signal scaling. A method for exact bit-masked color signal scaling comprises the steps of: generating a staggered masking signal; generating a center masking signal; generating a staggered result signal; generating a center result signal; and adding the staggered result signal and the center result signal to produce a scaled color signal. A method for approximate bit-masked color signal scaling comprises the steps of: generating an approximation masking signal; generating an approximation color signal; generating an approximation multiplication signal; and multiplying the approximation color signal and the approximation multiplication signal to produce an approximate scaled color signal.
In a computer system having a processing unit and a memory wherein an image memory, a multiplication image memory, and a scaling unit reside, a method for scaling a color signal comprising a first channel signal, a second channel signal, and a third channel signal, the method comprising the steps of:
In a computer system having a processing unit and a memory wherein an image memory, a multiplication image memory, and a scaling unit reside, a method for scaling a color signal comprising a first channel signal, a second channel signal, and a third channel signal, the method comprising the steps of:
In a computer system having a processing unit and a memory wherein an image memory, a multiplication image memory, and a scaling unit reside, an apparatus for scaling a color signal comprising a first channel signal, a second channel signal, and a third channel signal, the apparatus comprising:
In a computer system having a processing unit and a memory wherein an image memory, a multiplication image memory, and a scaling unit reside, an apparatus for scaling a color signal comprising a first channel signal, a second channel signal, and a third channel signal, the apparatus comprising:
Dependencies are inferred from the claim text.