Apparatus and method for accessing data

A data access apparatus for accessing data of an image, the data access apparatus comprising:

• a first memory;
• a second memory, wherein memory capacity of the first memory and the second memory is the same, and the neighbor data of the image are respectively stored in the first memory and the second memory;
• and
• a memory controller, coupled to the first memory and the second memory, for providing control signals and address signals to the first memory and the second memory together, and respectively providing a plurality of first address signals and a plurality of second address signals to the first memory and the second memory,
• wherein when the data access apparatus adopts a motion compensation and a start position of motion vector does not align with a width of a data bus of the first memory and the second memory, the data access apparatus sends different column address strobe (CAS) signals from the control signals, the first address signals and the second address signals through the memory controller to dynamically access the first memory and the second memory.