Audio-Specific Signal Processor(ASSP) for High-Quality Audio Codec

Abstract

This paper proposes an audio-specific signal processor for a high-quality audio codec. Filter bank calculation and Huffman decoding require massive computation in MPEG-2/4 AAC decoding. Therefore, the proposed architecture is specially designed for these tasks. The proposed architecture has two optimized units for the IMDCT (inverse modified discrete cosine transform) and Huffman decoding. Performance comparisons show significant improvement compared with other commercial DSPs. The proposed ASSP has been synthesized using the Samsung SEC 0.18 mum standard cell library. The proposed ASSP core consists of 120,283 gates and runs at 200 MHz