DSP implementation of real-time MPEG-2 audio decoder using novel synthesis filter bank

摘要

An efficient synthesis filter is presented which can carry out real-time MPEG-2 audio decoding. The proposed algorithm reduces the number of MAC operations by adopting novel IDCT and windowing schemes, exploiting a multichannel structure, and implementing CGD techniques. The DSP implementation is MPEG-2 compliant and achieves real-time processing with 60% reduction in run-time compared with a fast ISO decoder.