Abstract: Architecture with Hardware/Software co-design for AVS Variable Length Code ( VLC) decoding was designed. Fixed Length Code, k-th Exp-Golomb Code and context based adaptive 2I}VLC (CA-2I}VLC) Code were decoded correctly on the platform. New design method for VLC table was presented, which was the optimization of nineteen original tables. As a result of the logical design and large amount of instructions decrease, a reduction of more than 30% in hardware consumption was achieved. Verifier based on RM52J was proposed as well to validate the rationality and validity of the whole system. Tested by ninety-two streams, this design was proved to reach the requirement of AVS video decoding.

Key words: AVS, HW/SW co-design, Variable length code, CA-2D-VLC