Patent ID: 8170107

Claim:
A method of decoding a video bitstream, comprising the steps of: (A) buffering said video bitstream in a main memory, said video bitstream comprising a first residual block based on a first motion compensated block, said first motion compensated block having been generated by a subpixel motion compensation using an N-tap interpolation on a plurality of first reference samples; (B) copying a first subset of said first reference samples from said main memory to an internal memory; (C) generating a first decode block using said subpixel motion compensation with an M-tap interpolation on said first subset in said internal memory; (D) reconstructing a first original block by adding said first residual block to said first decode block; and; copying a second subset of a plurality of second reference samples from said main memory to said internal memory, said second subset being smaller in number than said first subset.