Patent ID: 7068392
Filing Date: 2006-06-27
Classification: G06F,G06T,H04N

Abstract:
1. An apparatus comprising: high-bit mapping means responsive to a digital signal for mapping a high-bit portion of said digital signal to provide a high-bit signal: low-bit calculation means responsive to said digital signal for determining a low-bit portion of said digital signal: combination means for combining said high-but signal with said low-bit signal to provide an output signal to a controller, wherein said low-bit calculation means further comprises: zone-factor mapping means for providing a factor based, at least in part, on a mapping of a portion of said high-bit portion with a slope table; and calculation means for multiplying said factor with said low-bit portion, wherein said slope table comprises a plurality of slope values that are calculated by differentiating a gamma curve stored in said high-bit mapping means.