Audio dynamic range compression characteristics based on an interpolating polynomial

Author

Wei, Shugang ; Shimizu, Kensuke

Author_Institution

Dept. of Comput. Sci., Gunma Univ., Japan

fYear

2004

fDate

20-23 June 2004

Firstpage

133

Lastpage

136

Abstract

An audio signal level compressor is presented, in this paper, which is based on the approximation algorithm using an interpolating polynomial. To implement a compression characteristic in a digital audio system, a power calculation with fractional numbers is required and it is difficult to be performed directly in a digital signal processing system. We introduce a polynomial expression to approximate the power operation then the gain calculation is easily performed with a number of additions, multiplications and a division. Newton´s interpolation formula is used to calculate the compression characteristics in a very short time.

Keywords

Newton method; audio signal processing; audio systems; interpolation; polynomial approximation; Newton interpolation formula; approximation algorithm; audio dynamic range compression characteristics; audio signal level compressor; digital audio system; digital signal processing system; polynomial approximation; power calculation; Audio recording; Audio systems; Circuits; Compressors; Computer science; Control systems; Dynamic range; Nonlinear distortion; Performance gain; Polynomials;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. NEWCAS 2004. The 2nd Annual IEEE Northeast Workshop on

Print_ISBN

0-7803-8322-2

Type

conf

DOI

10.1109/NEWCAS.2004.1359040

Filename

1359040