Image processing apparatus and control method image processing apparatus and control method for synchronizing an image data signal with a discrete effective pixel signal and continuous effective pixel signal

A method for controlling an image processing apparatus including a first image processing unit that operates at a first clock signal having a first frequency and a second image processing unit that operates at a second clock signal having a second frequency which is higher than the first frequency, the method comprising:

• a control step of, when image data is input from the first image processing unit to the second image processing unit, performing control so that the second clock signal is supplied to the second image processing unit if intra-line image data of the image data is being transmitted and where pixel data to be processed in the image data exists, no clock signal is supplied to the second image processing unit if the intra-line image data of the image data is being transmitted and no pixel data to be processed in the image data exists, and the second clock signal is supplied to the second image processing unit if the intra-line image data of the image data is not being transmitted, irrespective of whether or not pixel data to be processed in the image data exists.

A non-transitory computer-readable storage medium storing a program for causing an image processing apparatus to perform a control step,

• the image processing apparatus including a first image processing unit that operates at a first clock signal having a first frequency and a second image processing unit that operates at a second clock signal having a second frequency which is higher than the first frequency,
• the control step being a step of, when image data is input from the first image processing unit to the second image processing unit, performing control so that the second clock signal is supplied to the second image processing unit if intra-line image data of the image data is being transmitted and pixel data to be processed in the image data exists, no clock signal is supplied to the second image processing unit if the intra-line image data of the image data is being transmitted and no pixel data to be processed in the image data exists, and the second clock signal is supplied to the second image processing unit if the intra-line image data of the image data is not being transmitted, irrespective of whether or not pixel data to be processed in the image data exists.