MPEG-2 AAC 5.1-channel decoder software for a low-power embedded RISC microprocessor

Presented here is MPEG-2 AAC decoder software for a low-power embedded RISC microprocessor, NEC V830 (300 mW @133 MHz). Fast processing methods for IMDCT reduce execution time by 41% and help achieve real-time decoding of a 5.1-channel audio signal, while using only 64.7% of processor capacity.