Design and VLSI implementation of a digital audio-specific DSP core for MP3/AAC

In this paper, a digital audio-specific DSP core designed for a dual MP3/AAC decoder is presented. The processing core is a 20-bit fixed-point programmable DSP having an architecture suitable for audio signal processing. It supports special instructions like UNPACK, HUFFMAN as well as general arithmetic and logical instructions including pipelined-MAC. All instructions are completed within a single cycle. The DSP core is realized in a 0.35 /spl mu/m 3.3 V CMOS technology and operates at 40 MHz. The implemented DSP core with a dedicated hardware accelerator can decode MP3 using only 13.33 MIPS and AAC using only 16.9 MIPS with high efficiency.