Patent ID: 8665353

Claim:
A solid-state image pickup apparatus comprising: a pixel area in which unit pixels for generating signals by photoelectric conversion are arranged in a two-dimensional matrix; a plurality of analog/digital converters, each provided for the unit pixels on a same column, for converting analog signals output from the unit pixels into digital signals, respectively; a plurality of first memory units, each provided to respective analog/digital converters, for storing the digital signals derived from the pixel of one row that are converted by the respective one of plurality of analog/digital converters; a plurality of second memory units, each provided to respective analog/digital converters, for storing the digital signals derived from the pixel of another row that are converted by the respective one of plurality of analog/digital converters; and a digital signal processing unit for generating an output signal based on the signals from the first memory units and the signals from the second memory units, wherein the first memory units and the second memory units store the digital signals derived from the pixels of a same row at a non-addition operation and store the digital signals of different rows at an addition operation, and wherein, at the non-addition operation, when one of the first memory unit and the second memory unit on a target column is defective, the digital signal processing unit generates the output signal based on the signal from the other one of the first memory unit and the second memory unit on the same column.