Circuit implementation for transform and quantization operations of H.264/MPEG-4/VC-1 video decoder

Current trend of digital convergence leads to the need of the video decoder that can support the multiple standards such as H.264, MPEG-4 and VC-1. We implemented a circuit to perform the transform and quantization operations for the three video compression standards. Instead of designing the circuit for each standard separately, we analyzed the transform and quantization operations in detail to find the possibilities of sharing resources such as adders and multipliers, and finally devised a common architecture that can be applied to all of them. The resultant circuit is efficient in terms of its size compared to the case of separate implementation for each standard.