net.java.sip.communicator.impl.neomedia.codec.audio.silk
Class Silk_resampler_private_ARMA4

java.lang.Object
  net.java.sip.communicator.impl.neomedia.codec.audio.silk.Silk_resampler_private_ARMA4

public class Silk_resampler_private_ARMA4
extends Object

Fourth order ARMA filter. Internally operates as two biquad filters in sequence. Coeffients are stored in a packed format: { B1_Q14[1], B2_Q14[1], -A1_Q14[1], -A1_Q14[2], -A2_Q14[1], -A2_Q14[2], gain_Q16 } where it is assumed that B*_Q14[0], B*_Q14[2], A*_Q14[0] are all 16384.

Author:

Jing Dai, Dingxin Xu

Constructor Summary

Silk_resampler_private_ARMA4()

Method Summary

(package private) static void

SKP_Silk_resampler_private_ARMA4(int[] S, int S_offset, short[] out, int out_offset, short[] in, int in_offset, short[] Coef, int Coef_offset, int len)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Silk_resampler_private_ARMA4

public Silk_resampler_private_ARMA4()

Method Detail

SKP_Silk_resampler_private_ARMA4

static void SKP_Silk_resampler_private_ARMA4(int[] S,
                                             int S_offset,
                                             short[] out,
                                             int out_offset,
                                             short[] in,
                                             int in_offset,
                                             short[] Coef,
                                             int Coef_offset,
                                             int len)

Parameters:

S - State vector [ 4 ].

S_offset - offset of valid data.

out - Output signal.

out_offset - offset of valid data.

in - Input signal.

in_offset - offset of valid data.

Coef - ARMA coefficients [ 7 ].

Coef_offset - offset of valid data.

len - Signal length.