The present invention provides a context-aware frame memory scheme for motion compensation in video decoding, which utilizes a motion compensator to receive a data block from input video decoding, follow by processing both inputted context characteristic of residual block and motion vector respectively. The conception of technology is first based on the context characteristic of input video data decoding block, if there is no residual value and motion vector, it will be defined as “perfect match block”; otherwise, “non-perfect match block” instead. Then, the circuit architecture for memory accessing in video decoding provided by present invention will perform different memory access steps for the above mentioned two types of block. If one determines that a block is “non-perfect match block”, selectively choose the reference frame as a back-up data; On contrary, if a block is “perfect match block”, it represents there is no difference between both reference frame and reconstructive frame, hence no access is required to the main frame memory, which means that the access frequency can be minimized; therefore, it can minimize the consumption of the memory capacity as well.
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