MDCT / IMDCT low power implementations in 90 nm CMOS technology for MP3 audio

Abstract

MDCT is the basic processing component for high quality audio compression. It is also the most computationally intensive operation in the vast majority of audio compression standards. Mostly used audio standard for audio compression is still MP3. This paper presents new implementations of five MDCT / IMDCT architectures with different parallelization levels for MP3. Implementation utilize UMC 90 nm CMOS technology. Design was optimized for low power applications. Low power libraries and clock gating technique were used for power reduction. All IP cores are capable of computing forward and backward MDCT and this feature makes them universal in multimedia SoCs for accelerating the MP3 audio compression/decompression.