Patent ID: 7352480

Claim:
An image processing apparatus comprising: a memory unit storing image data; and an image processing unit, connected to said memory unit through a general-purpose bus, performing image processing on image data transmitted to the image processing unit via the general-purpose bus; wherein said image processing unit comprises: a first memory portion storing image data transmitted from the memory unit; a magnification change processing portion performing magnification change processing on image data transmitted from said first memory portion; a generating portion generating a sync signal at a predetermined period, wherein the sync signal is used to transmit image data from said first memory portion to said magnification change processing portion; a second memory portion storing image data on which image processing is performed by an image processing portion; an outputting portion outputting image data stored in said second memory portion to the general-purpose bus; and a control portion controlling the generating portion so that the predetermined period of the sync signal generated in a case where said magnification change processing portion performs enlargement processing is longer than the predetermined period of the sync signal generated in a case where said magnification change processing portion performs a reduction processing, wherein said control portion controls the generating portion to generate the sync signal in a case where image data to be transmitted from said second memory portion to said outputting portion does not exist, and controls the generating portion not to generate the sync signal in a case where image data to be transmitted from said second memory portion to said outputting portion does exist.