Title :
A 24-bit floating-point audio DSP controller supporting fast exponentiation
Author :
Lee, Sung-Won ; Kang, Hyeong-Ju ; Park, In-Cheol
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., KAIST, Daejeon, South Korea
Abstract :
This paper describes a 24-bit floating-point DSP controller developed for audio applications. For easy system design, a floating-point DSP and interface blocks including USB, I2S, and UART are integrated onto a single chip. Based on the floating-point arithmetic optimized for audio processing algorithms, a fast, single-cycle floating-point unit is designed to achieve high performance. In addition, a special unit to calculate exponential function is proposed. The exponentiation unit uses three instructions to compute xy without losing audio quality.
Keywords :
CMOS digital integrated circuits; audio signal processing; digital signal processing chips; floating point arithmetic; 24 bit; I2S; UART; USB; audio applications; audio processing algorithms; exponential function; exponentiation unit; fast exponentiation; floating-point arithmetic; floating-point audio DSP controller; interface blocks; single-cycle floating-point unit; Application software; Communication system control; Decoding; Digital audio players; Digital signal processing; Digital signal processing chips; Floating-point arithmetic; Signal processing algorithms; Streaming media; Universal Serial Bus;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1206082
