Specifications

The DIGIC 4 Image Processor has approximately six times more processing power than

the DIGIC III Image Processor. It can match the III’s very fine image detail and natural

color reproduction while attaining even faster signal processing. Because of the huge com-

puting capability required by the 16.1 Megapixel sensor, its 10 fps maximum continuous

shooting speed and the EOS-1D Mark IV’s HD video functions, two DIGIC 4 Image

Processors are provided. Processing speeds are more than three times faster than those of

the EOS-1D Mark III despite the increase in the number of pixels. Thus, for example, the

Dual DIGIC 4 Image Processor array can prevent the burst rate reduction previously

caused by Standard and Low High ISO noise reduction settings.

IV–5. DUAL DIGIC 4 IMAGING PROCESSORS

CF card

SD card

Front-end

Processing

circuit

Front-end

Processing

circuit

DIGIC 4

DDR2

SDRAM

DIGIC 4

DDR2

SDRAM

A/D conversion

DUAL DIGIC 4 Imaging Processor