Patent ID: 8259206

Claim:
A solid-state imaging apparatus comprising: a plurality of pixels arranged in a two-dimensional array; a comparator arranged correspondingly to each column of the pixels; a memory including first, second, third, and fourth holding units, arranged correspondingly to each column of the pixels, wherein for each column of the pixels: the comparator compares an analog signal based on a pixel in a corresponding column with a reference signal, the first holding unit holds a digital signal, responsive to an inversion of a result of comparing between the analog signal and the reference signal compared by the comparator, the second holding unit holds a digital signal, responsive to an inversion of a result of comparing between the analog signal and the reference signal compared by the comparator, the third holding unit holds the digital signal held by the first holding unit, the fourth holding unit holds the digital signal held by the second holding unit, and a group of the first and third holding units and a group of the second and fourth holding units are arranged along the column of the pixel.