Title :
Low-Power High-Speed Radix-2 DIT FFT Suitable for AAC/DRA Audio Decoding
Author :
Wang, Yiyuan ; Li, Ping ; Wang, Yiwen ; Li, Hui
Author_Institution :
State Key Lab. of Electron. Thin Films & Integrated Devices, Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In this paper, an implementation of low-power, high-speed radix-2 DIT (decimation-in-time) FFT suitable for AAC/DRA audio decoding is presented. For low-power and high-speed considerations, two methods are adopted: adding cache to ROM (ROM-cache) and proposing a new butterfly (AI-Butterfly). Simulations in Matlab have verified the correctness of this implementation. The comparisons between the proposed FFT implementation and other FFTs prove that the proposed FFT has a big reduction in power consumption, and only 19% slower than the fastest pipeline FFT, but 30% faster than cached-FFT and 61% faster than original radix-2 DIT FFT.
Keywords :
audio coding; cache storage; decoding; fast Fourier transforms; read-only storage; AAC-DRA audio decoding; Matlab; ROM-cache; advanced audio coding-dynamic resolution adaptation; cached-FFT; decimation-in-time; low-power high-speed radix-2 DIT FFT; pipeline FFT; Algorithm design and analysis; Decoding; Energy consumption; Filter bank; Image analysis; Random access memory; Read only memory; Read-write memory; Signal analysis; Signal processing algorithms;
Conference_Titel :
Computer Network and Multimedia Technology, 2009. CNMT 2009. International Symposium on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-5272-9
DOI :
10.1109/CNMT.2009.5374790
