IMAGE SIGNAL PROCESSING APPARATUS, CAMERA SYSTEM AND IMAGE SIGNAL PROCESSING METHOD

An image signal processing apparatus, the method and a camera system are provided, by which highly efficient processing close to 1-path processing can be performed without deteriorating a picture quality or taking too much time for the processing, a capacity required for a compression rate, band and memory in the worst case can be assured and a random accessing property is not impaired when compressing image data: wherein a data signal processing unit performs a compression processing by dividing input image data to a plurality of bit resolution parts and applying a predetermined compression method to each divided part.