public class A2NLSF
extends Object
Conversion between prediction filter coefficients and NLSFs.
Requires the order to be an even number.
A piecewise linear approximation maps LSF <-> cos(LSF).
Therefore the result is not accurate NLSFs, but the two.
function are accurate inverses of each other.
- Author:
- Jing Dai, Dingxin Xu