HW/SW co-design and implementation of multi-standard video decoding

In this paper, we present a design and implementation of multi-standard video decoder, which adopts the principle of HW/SW cooperation to achieve real time video decoding process. Based on the profiling of MPEG-1/2/4 video decoding algorithms, the computational intensive IDCT and sub-pixel interpolation are figured out to implement with hardware, and the dedicated DMA channels are provided to fulfill the high throughput of MC processing. The remained decoding functions are realized with software based on a RISC CPU. The design shares the advantage of high flexibility to fulfill multi-standard processing. With the assistant hardware accelerating, the proposed video decoder can achieve the MPEG-1/2/4 D1 size (720 ?? 480) video decoding at 30 fps. ? 2006 IEEE.EI