Patent ID: 7812870

Claim:
A system to convert the output of red, green, blue and white image sensors to YCbCr color space within an analog domain comprising: a configuration of red, green, blue and white image sensors, wherein only said white image sensors are extended dynamic range (XDR) image sensors and wherein the output of the white image sensors represents the luminance Y and is connected to the input of a correspondent analog-to digital converter and wherein each of said red, green and blue image sensors is connected to two parallel analog amplifiers; a configuration of six analog amplifiers, wherein a first analog amplifier, having a gain in the order of magnitude of 0.169, is connected to a red image sensor, a second amplifier, having a gain in the order of magnitude of 0.5 is connected to the red image sensor in parallel, a third analog amplifier, having a gain in the order of magnitude of 0.331, is connected to a green image sensor, a fourth amplifier, having a gain in the order of magnitude of 0.419 is connected to the green image sensor in parallel, a fifth analog amplifier, having a gain in the order of magnitude of 0.5, is connected to a blue image sensor, and a sixth amplifier, having a gain in the order of magnitude of 0.081 is connected to the blue image sensor in parallel; a configuration of four analog inverters wherein a first inverter inverts the analog output of said first amplifier, a second inverter inverts the output of said third amplifier, a third inverter inverts the output of said fourth amplifier, and a fourth inverter inverts the output of said sixth amplifier; a configuration of two analog adders, wherein a first analog adder is adding the output of said first inverter, the output of said second inverter, and the output of said fifth amplifier and the output of said first adder is an analog signal of Cb, and wherein a second adder is adding the output of said second amplifier, the output of said third inverter, and the output of said fourth inverter and the output of said second adder is an analog signal of Cr; and a configuration of three analog-to-digital converters wherein a first converter is converting the Cb signal, a second converter is converting the Cr signal, and a third converter is converting the output of said white image sensor representing the luminance Y.