gusucode.com > 信号处理工具箱 - signal源码程序 > signal\signal\signal\rc2is.m
function inv_sin = rc2is(k) %RC2IS Convert reflection coefficients to inverse sine parameters. % INV_SIN = RC2IS(K) returns the inverse sine parameters corresponding % to the reflection coefficients, K. % % See also IS2RC, RC2POLY, RC2AC, RC2LAR. % Reference: J.R. Deller, J.G. Proakis, J.H.L. Hansen, "Discrete-Time % Processing of Speech Signals", Prentice Hall, Section 7.4.5. % % Author(s): A. Ramasubramanian % Copyright (c) 1988-98 by The MathWorks, Inc. % $Revision: 1.1 $ $Date: 1998/07/24 16:12:13 $ if ~isreal(k), error('Inverse sine parameters not defined for complex reflection coefficients.'); end if max(abs(k)) >= 1, error('All reflection coefficients should have magnitude less than unity.'); end inv_sin = (2/pi)*asin(k); % [EOF] rc2is.m