Package org.xiph.speex
Class Ltp3Tap
java.lang.Object
org.xiph.speex.Ltp
org.xiph.speex.Ltp3Tap
Long Term Prediction Quantisation and Unquantisation (3Tap)
- Version:
- $Revision: 1.2 $
- Author:
- Jim Lawrence, helloNetwork.com, Marc Gimpel, Wimba S.A. (mgimpel@horizonwimba.com)
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate float[][]
private float[]
private int
private int[]
private int
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprivate float
pitch_gain_search_3tap
(float[] target, float[] ak, float[] awk1, float[] awk2, float[] exc, int es, int pitch, int p, int nsf, Bits bits, float[] exc2, int e2s, float[] r, int[] cdbk_index) Finds the best quantized 3-tap pitch predictor by analysis by synthesis.final int
quant
(float[] target, float[] sw, int sws, float[] ak, float[] awk1, float[] awk2, float[] exc, int es, int start, int end, float pitch_coef, int p, int nsf, Bits bits, float[] exc2, int e2s, float[] r, int complexity) Long Term Prediction Quantification (3Tap).final int
unquant
(float[] exc, int es, int start, float pitch_coef, int nsf, float[] gain_val, Bits bits, int count_lost, int subframe_offset, float last_pitch_gain) Long Term Prediction Unquantification (3Tap).Methods inherited from class org.xiph.speex.Ltp
inner_prod, open_loop_nbest_pitch
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Field Details
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gain
private float[] gain -
gain_cdbk
private int[] gain_cdbk -
gain_bits
private int gain_bits -
pitch_bits
private int pitch_bits -
e
private float[][] e
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Constructor Details
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Ltp3Tap
public Ltp3Tap(int[] gain_cdbk, int gain_bits, int pitch_bits) Constructor- Parameters:
gain_cdbk
-gain_bits
-pitch_bits
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Method Details
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quant
public final int quant(float[] target, float[] sw, int sws, float[] ak, float[] awk1, float[] awk2, float[] exc, int es, int start, int end, float pitch_coef, int p, int nsf, Bits bits, float[] exc2, int e2s, float[] r, int complexity) Long Term Prediction Quantification (3Tap). -
unquant
public final int unquant(float[] exc, int es, int start, float pitch_coef, int nsf, float[] gain_val, Bits bits, int count_lost, int subframe_offset, float last_pitch_gain) Long Term Prediction Unquantification (3Tap).- Specified by:
unquant
in classLtp
- Parameters:
exc
- - Excitationes
- - Excitation offsetstart
- - Smallest pitch value allowedpitch_coef
- - Voicing (pitch) coefficientnsf
- - Number of samples in subframegain_val
-bits
- - Speex bits buffer.count_lost
-subframe_offset
-last_pitch_gain
-- Returns:
- pitch
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pitch_gain_search_3tap
private float pitch_gain_search_3tap(float[] target, float[] ak, float[] awk1, float[] awk2, float[] exc, int es, int pitch, int p, int nsf, Bits bits, float[] exc2, int e2s, float[] r, int[] cdbk_index) Finds the best quantized 3-tap pitch predictor by analysis by synthesis.- Parameters:
target
- Target vectorak
- LPCs for this subframeawk1
- Weighted LPCs #1 for this subframeawk2
- Weighted LPCs #2 for this subframeexc
- Excitationes
-pitch
- Pitch valuep
- Number of LPC coeffsnsf
- Number of samples in subframebits
-exc2
-e2s
-r
-cdbk_index
-- Returns:
- the best quantized 3-tap pitch predictor by analysis by synthesis.
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