Abstract: A digital-camera processor receives mono-color digital pixels from an image sensor. Each mono-color pixel is red, blue, or green. The stream of pixels from the sensor has alternating green and red pixels on odd lines, and blue and green pixels on even lines in a Bayer pattern. Each mono-color pixel is white balanced by multiplying with a gain determined in a previous frame and then stored in a line buffer. A horizontal interpolator receives an array of pixels from the line buffer. The horizontal interpolator generates missing color values by interpolation within horizontal lines in the array. The intermediate results from the horizontal interpolator are stored in a column buffer, and represent one column of pixels from the line buffer. A vertical interpolator generates the final RGB value for the pixel in the middle of the column register by vertical interpolation. The RGB values are converted to YUV. The vertical interpolator also generates green values for pixels above and below the middle pixel.

Abstract: A high-performance carry lookahead adder (CLA) which can reduce the delay time of the whole adder by constructing a carry generator used therein with NMOS logics, thereby effecting a high-speed operation of the adder along with a lower power-consumption. The carry generator receives an exclusive-OR value P(i, i=1,2,3,4) and a logic product value G(i) of two data, and an initial carry value C(1), and performs a function of G(4)+P(4).multidot.G(3)+P(4).multidot.P(3).multidot.G(2)+P(4).multidot.P(3 ).multidot.P(2).multidot.G(1)+P(4).multidot.P(3).multidot.P(2).multidot.P(1 ).multidot.C(1) to output a final carry value C(5). The carry generator includes a first NMOS transistor for executing an operation of P(4).multidot.G(3), second and third NMOS transistors for executing an operation of P(4).multidot.P(3).multidot.G(2), fourth to sixth NMOS transistors for executing an operation of P(4).multidot.P(3).multidot.P(2).multidot.G(1), seventh to eleventh NMOS transistors for executing an operation of P(4).multidot.

Abstract: A digital-camera processor receives mono-color digital pixels from an image sensor. Each mono-color pixel is red, blue, or green. The stream of pixels from the sensor has alternating green and red pixels on odd lines, and blue and green pixels on even lines in a Bayer pattern. Each mono-color pixel is white balanced by multiplying with a gain determined in a previous frame and then stored in a line buffer. A horizontal interpolator receives an array of pixels from the line buffer. The horizontal interpolator generates missing color values by interpolation within horizontal lines in the array. The intermediate results from the horizontal interpolator are stored in a column buffer, and represent one column of pixels from the line buffer. A vertical interpolator generates the final RGB value for the pixel in the middle of the column register by vertical interpolation. The RGB values are converted to YUV. The vertical interpolator also generates green values for pixels above and below the middle pixel.