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

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

public class Silk_NLSF_stabilize
extends Object

NLSF stabilizer: - Moves NLSFs further apart if they are too close - Moves NLSFs away from borders if they are too close - High effort to achieve a modification with minimum Euclidean distance to input vector - Output are sorted NLSF coefficients

Author:

Jing Dai, Dingxin Xu

Field Summary

(package private) static int

MAX_LOOPS Constant Definitions.

Constructor Summary

Silk_NLSF_stabilize()

Method Summary

(package private) static void	SKP_Silk_NLSF_stabilize_multi(int[] NLSF_Q15, int[] NDeltaMin_Q15, int N, int L) NLSF stabilizer, over multiple input column data vectors.
(package private) static void	SKP_Silk_NLSF_stabilize(int[] NLSF_Q15, int NLSF_Q15_offset, int[] NDeltaMin_Q15, int L) NLSF stabilizer, for a single input data vector.

Methods inherited from class java.lang.Object

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

Field Detail

MAX_LOOPS

static final int MAX_LOOPS

Constant Definitions.

See Also:

Constant Field Values

Constructor Detail

Silk_NLSF_stabilize

public Silk_NLSF_stabilize()

Method Detail

SKP_Silk_NLSF_stabilize

static void SKP_Silk_NLSF_stabilize(int[] NLSF_Q15,
                                    int NLSF_Q15_offset,
                                    int[] NDeltaMin_Q15,
                                    int L)

NLSF stabilizer, for a single input data vector.

Parameters:

NLSF_Q15 - Unstable/stabilized normalized LSF vector in Q15 [L].

NLSF_Q15_offset - offset of valid data.

NDeltaMin_Q15 - Normalized delta min vector in Q15, NDeltaMin_Q15[L] must be >= 1 [L+1].

L - Number of NLSF parameters in the input vector.

SKP_Silk_NLSF_stabilize_multi

static void SKP_Silk_NLSF_stabilize_multi(int[] NLSF_Q15,
                                          int[] NDeltaMin_Q15,
                                          int N,
                                          int L)

NLSF stabilizer, over multiple input column data vectors.

Parameters:

NLSF_Q15 - Unstable/stabilized normalized LSF vectors in Q15 [LxN].

NDeltaMin_Q15 - Normalized delta min vector in Q15, NDeltaMin_Q15[L] must be >= 1 [L+1].

N - Number of input vectors to be stabilized.

L - NLSF vector dimension.