| /external/libvorbis/lib/ |
| lpc.h | 13 function: LPC low level routines
14 last mod: $Id: lpc.h 16037 2009-05-26 21:10:58Z xiphmont $
23 /* simple linear scale LPC code */
24 extern float vorbis_lpc_from_data(float *data,float *lpc,int n,int m);
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| lpc.c | 13 function: LPC low level routines
14 last mod: $Id: lpc.c 16227 2009-07-08 06:58:46Z xiphmont $
18 /* Some of these routines (autocorrelator, LPC coefficient estimator)
51 #include "lpc.h"
55 /* Autocorrelation LPC coeff generation algorithm invented by
59 Output: m lpc coefficients, excitation energy */
63 double *lpc=alloca(sizeof(*lpc)*(m)); local
76 /* Generate lpc coefficients from autocorr values */
86 memset(lpc+i,0,(m-i)*sizeof(*lpc))
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| lsp.h | 22 extern int vorbis_lpc_to_lsp(float *lpc,float *lsp,int m);
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| Makefile.am | 10 lpc.c analysis.c synthesis.c psy.c info.c \
14 envelope.h lpc.h lsp.h codebook.h misc.h psy.h\
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| /external/speex/libspeex/ |
| lpc.c | 56 #include "lpc.h"
62 /* LPC analysis
74 spx_coef_t *lpc, /* out: [0...p-1] LPC coefficients */
86 lpc[i] = 0;
95 rr = SUB32(rr,MULT16_16(lpc[j],ac[i - j]));
101 /* Update LPC coefficients and total error */
102 lpc[i] = r;
105 spx_word16_t tmp = lpc[j];
106 lpc[j] = MAC16_16_P13(lpc[j],r,lpc[i-1-j])
[all...] |
| lpc.h | 3 @file lpc.h
4 @brief Functions for LPC (Linear Prediction Coefficients) analysis
47 spx_coef_t * lpc, /* [0...p-1] LPC coefficients */
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| nb_celp.h | 56 int windowSize; /**< Analysis (LPC) window length */
57 int lpcSize; /**< LPC order */
76 spx_word16_t lpc_floor; /**< Noise floor multiplier for A[0] in LPC analysis*/
93 spx_word32_t *pi_gain; /**< Gain of LPC filter at theta=pi (fe/2) */
130 int lpcSize; /**< LPC order */
144 spx_word32_t *pi_gain; /**< Gain of LPC filter at theta=pi (fe/2) */
161 int lpc_enh_enabled; /**< 1 when LPC enhancer is on, 0 otherwise */
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| filters.h | 68 /* Apply bandwidth expansion on LPC coef */
81 spx_coef_t *ak, /*LPC filter coefs*/
82 int p, /*LPC order*/
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| /frameworks/av/media/libstagefright/codecs/amrwbenc/src/ |
| weight_a.c | 20 * Description:Weighting of LPC coefficients *
29 Word16 a[], /* (i) Q12 : a[m+1] LPC coefficients */
30 Word16 ap[], /* (o) Q12 : Spectral expanded LPC coefficients */
32 Word16 m /* (i) : LPC order. */
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| /external/chromium_org/third_party/opus/src/silk/float/ |
| LPC_analysis_filter_FLP.c | 36 /* LPC analysis filter */
42 /* 16th order LPC analysis filter, does not write first 16 samples */
44 silk_float r_LPC[], /* O LPC residual signal */
45 const silk_float PredCoef[], /* I LPC coefficients */
80 /* 12th order LPC analysis filter, does not write first 12 samples */
82 silk_float r_LPC[], /* O LPC residual signal */
83 const silk_float PredCoef[], /* I LPC coefficients */
114 /* 10th order LPC analysis filter, does not write first 10 samples */
116 silk_float r_LPC[], /* O LPC residual signal */
117 const silk_float PredCoef[], /* I LPC coefficients *
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| main_FLP.h | 104 const silk_float *pitch_res, /* I LPC residual from pitch analysis */
135 /* Find LPC and LTP coefficients */
144 /* LPC analysis */
157 const silk_float r_lpc[], /* I LPC residual */
185 const opus_int LPC_order /* I LPC order */
188 /* 16th order LPC analysis filter */
190 silk_float r_LPC[], /* O LPC residual signal */
191 const silk_float PredCoef[], /* I LPC coefficients */
194 const opus_int Order /* I LPC order */
276 const silk_float *pAR, /* I LPC coefficients [ LPC_order ] *
[all...] |
| LPC_inv_pred_gain_FLP.c | 37 /* compute inverse of LPC prediction gain, and */
38 /* test if LPC coefficients are stable (all poles within unit circle) */
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| /external/webrtc/src/modules/audio_coding/codecs/isac/main/source/ |
| entropy_coding.h | 79 /* decode & dequantize LPC Coef */
88 /* quantize & code LPC Coef */
98 * Encode LPC parameters, given as A-polynomial, of upper-band. The encoding
100 * For the upper-band, we compute and encode LPC of some sub-frames, LPC of
102 * function performs the interpolation and returns the LPC of all sub-frames.
116 * - interpolLPCCoeff : Decoded and interpolated LPC (A-polynomial)
120 * (k + 1) * N, each vector starts with the LPC gain
121 * of the corresponding sub-frame. The LPC gains
136 * Decode LPC coefficients and interpolate to get the coefficients fo al
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| encode_lpc_swb.h | 15 * encode LPC parameters (Shape & gain) of the upper band.
190 * Transform the LPC gain to log domain then remove the mean value.
193 * -lpcGain : pointer to LPC Gain, expecting 6 LPC gains
205 * Decorrelate LPC gains. There are 6 LPC Gains per frame. This is like
209 * -data : LPC gain in log-domain with mean removed.
225 * -lpcGain : uncorrelated LPC gains.
274 * -lpcGain : LPC gain in log-domain & mean removed
277 * -lpcGain : LPC gain in normal domain
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| lpc_gain_swb_tables.c | 14 * This file defines tables used for entropy coding of LPC Gain
29 * LPC gains.
37 * Number of reconstruction points of quantizers for LPC Gains.
53 * The following 6 vectors define CDF of 6 decorrelated LPC
117 * An array of pointers to CDFs of decorrelated LPC Gains
127 * A matrix to decorrellate LPC gains of subframes.
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| /external/chromium_org/third_party/opus/src/celt/ |
| celt_lpc.c | 38 opus_val16 *_lpc, /* out: [0...p-1] LPC coefficients */
47 opus_val32 lpc[LPC_ORDER]; local
49 float *lpc = _lpc; local
53 lpc[i] = 0;
60 rr += MULT32_32_Q31(lpc[j],ac[i - j]);
63 /* Update LPC coefficients and total error */
64 lpc[i] = SHR32(r,3);
68 tmp1 = lpc[j];
69 tmp2 = lpc[i-1-j];
70 lpc[j] = tmp1 + MULT32_32_Q31(r,tmp2)
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| pitch.c | 153 opus_val16 lpc[4], mem[5]={0,0,0,0,0}; local
202 _celt_lpc(lpc, ac, 4);
206 lpc[i] = MULT16_16_Q15(lpc[i], tmp);
209 lpc2[0] = lpc[0] + QCONST16(.8f,SIG_SHIFT);
210 lpc2[1] = lpc[1] + MULT16_16_Q15(c1,lpc[0]);
211 lpc2[2] = lpc[2] + MULT16_16_Q15(c1,lpc[1]);
212 lpc2[3] = lpc[3] + MULT16_16_Q15(c1,lpc[2])
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| /external/chromium_org/third_party/opus/src/silk/fixed/ |
| residual_energy_FIX.c | 45 const opus_int LPC_order /* I LPC order */
58 /* Filter input to create the LPC residual for each frame half, and measure subframe energies */
62 /* Calculate half frame LPC residual signal including preceding samples */
65 /* Point to first subframe of the just calculated LPC residual signal */
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| /external/flac/libFLAC/ |
| Android.mk | 13 lpc.c \
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| /external/libvorbis/ |
| Android.mk | 18 lib/lpc.c \
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| /external/webrtc/src/modules/audio_coding/codecs/isac/fix/source/ |
| entropy_coding.h | 37 /* decode & dequantize LPC Coef */
49 /* quantize & code LPC Coef */
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| /external/chromium_org/third_party/opus/src/silk/ |
| define.h | 98 /* Order of LPC used in find pitch */
101 /* Length of LPC window used in find pitch */
110 /* Maximum length of LPC window used in noise shape analysis */
132 /* Maximum numbers of iterations used to stabilize an LPC vector */
149 /* Max LPC order of noise shaping filters */
174 #define MAX_MATRIX_SIZE MAX_LPC_ORDER /* Max of LPC Order and LTP order */
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| PLC.c | 49 opus_int16 frame[] /* O LPC residual signal */
157 /* Save LPC coeficients */
171 opus_int16 frame[] /* O LPC residual signal */
235 /* LPC concealment. Apply BWE to previous LPC */
238 /* Preload LPC coeficients to array on stack. Gives small performance gain */
253 /* Reduce random noise for unvoiced frames with high LPC gain */
298 /* Generate LPC excitation */
319 /* LPC synthesis filtering */
323 /* Copy LPC state *
[all...] |
| process_NLSFs.c | 90 /* Convert quantized NLSFs back to LPC coefficients */
98 /* Convert back to LPC coefficients */
102 /* Copy LPC coefficients for first half from second half */
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| PLC.h | 39 #define LOG2_INV_LPC_GAIN_HIGH_THRES 3 /* 2^3 = 8 dB LPC gain */
40 #define LOG2_INV_LPC_GAIN_LOW_THRES 8 /* 2^8 = 24 dB LPC gain */
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