Data Partition Analyses for Video Decoders on Pac Duo Platform

Two of the most popular video coding standards, MEPG-2 and H.264, are realized on PAC Duo platform, a heterogeneous multi-core SoC containing one ARM core and two PACDSP's (Parallel Architecture Core DSP). In addition to the optimization of the video software codes, in order to fit to the architecture of PACDSP, the inter-core synchronization required by the dual core implementation must be added to the decoder software. The analysis is also conduced to figure out the roots causing the degradation in performance for the dual core scenarios. The experimental result indicates that the dual PACDSP's with data partition can gain about 64% and 92.4% of improvement in performance over the single PACDSP for the H.264 constrained baseline decoder and MPEG-2 main profile decoder, respectively.