A fully pipelined parallel CORDIC architecture for half-pel motion estimation

Based on the concept of pseudo-phase and the sinusoidal orthogonal principles, we design a novel low-complexity and high throughput CORDIC (COordinate Rotation Digital Computer) architecture for half-pel motion estimation. The proposed multiplier-free and fully-pipelined parallel architecture works solely at DCT domain without interpolation of input images to meet the needs of high-quality high-bit rate video communications. In addition, the DCT-based nature enables us to efficiently combine the DCT and motion estimator into one single component of relatively low complexity. Its regular and modular structure along with only local interconnection provides a low-complexity solution for MPEG-2 and H.263 compatible video codec design on a dedicated single chip.