Common Sharing Distributed Arithmetic Method with Eight Parallel Computation Paths Used Effective Multi Standard Transform Core Supporting the Standards

This paper proposes a low-cost high-throughput multi standard transform (MST) core, which can support MPEG1/2/4 (8 × 8), H.264 (8 × 8, 4 × 4)[2][3], and VC-1 (8 × 8, 8 × 4, 4×8, 4×4) transforms[4]. Common sharing distributed arithmetic (CSDA) combines factor sharing and distributed arithmetic sharing techniques, efficiently reducing the number of adders for high hardware-sharing capability[5][7]. This achieves a reduction in adders in the proposed MST, compared with the direct implementation method. With eight parallel computation paths, the proposed MST core has an eightfold operation frequency throughput rate.The CSDA-MST[8][9] core thus achieves a high-throughput rate supporting multi standard transformations at low cost.