1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_NSX_DEFINES_H_ 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_NSX_DEFINES_H_ 13 14 #define ANAL_BLOCKL_MAX 256 /* Max analysis block length */ 15 #define HALF_ANAL_BLOCKL 129 /* Half max analysis block length + 1 */ 16 #define NUM_HIGH_BANDS_MAX 2 /* Max number of high bands */ 17 #define SIMULT 3 18 #define END_STARTUP_LONG 200 19 #define END_STARTUP_SHORT 50 20 #define FACTOR_Q16 2621440 /* 40 in Q16 */ 21 #define FACTOR_Q7 5120 /* 40 in Q7 */ 22 #define FACTOR_Q7_STARTUP 1024 /* 8 in Q7 */ 23 #define WIDTH_Q8 3 /* 0.01 in Q8 (or 25 ) */ 24 25 /* PARAMETERS FOR NEW METHOD */ 26 #define DD_PR_SNR_Q11 2007 /* ~= Q11(0.98) DD update of prior SNR */ 27 #define ONE_MINUS_DD_PR_SNR_Q11 41 /* DD update of prior SNR */ 28 #define SPECT_FLAT_TAVG_Q14 4915 /* (0.30) tavg parameter for spectral flatness measure */ 29 #define SPECT_DIFF_TAVG_Q8 77 /* (0.30) tavg parameter for spectral flatness measure */ 30 #define PRIOR_UPDATE_Q14 1638 /* Q14(0.1) Update parameter of prior model */ 31 #define NOISE_UPDATE_Q8 26 /* 26 ~= Q8(0.1) Update parameter for noise */ 32 33 /* Probability threshold for noise state in speech/noise likelihood. */ 34 #define ONE_MINUS_PROB_RANGE_Q8 205 /* 205 ~= Q8(0.8) */ 35 #define HIST_PAR_EST 1000 /* Histogram size for estimation of parameters */ 36 37 /* FEATURE EXTRACTION CONFIG */ 38 /* Bin size of histogram */ 39 #define BIN_SIZE_LRT 10 40 /* Scale parameters: multiply dominant peaks of the histograms by scale factor to obtain. */ 41 /* Thresholds for prior model */ 42 #define FACTOR_1_LRT_DIFF 6 /* For LRT and spectral difference (5 times bigger) */ 43 /* For spectral_flatness: used when noise is flatter than speech (10 times bigger). */ 44 #define FACTOR_2_FLAT_Q10 922 45 /* Peak limit for spectral flatness (varies between 0 and 1) */ 46 #define THRES_PEAK_FLAT 24 /* * 2 * BIN_SIZE_FLAT_FX */ 47 /* Limit on spacing of two highest peaks in histogram: spacing determined by bin size. */ 48 #define LIM_PEAK_SPACE_FLAT_DIFF 4 /* * 2 * BIN_SIZE_DIFF_FX */ 49 /* Limit on relevance of second peak */ 50 #define LIM_PEAK_WEIGHT_FLAT_DIFF 2 51 #define THRES_FLUCT_LRT 10240 /* = 20 * inst->modelUpdate; fluctuation limit of LRT feat. */ 52 /* Limit on the max and min values for the feature thresholds */ 53 #define MAX_FLAT_Q10 38912 /* * 2 * BIN_SIZE_FLAT_FX */ 54 #define MIN_FLAT_Q10 4096 /* * 2 * BIN_SIZE_FLAT_FX */ 55 #define MAX_DIFF 100 /* * 2 * BIN_SIZE_DIFF_FX */ 56 #define MIN_DIFF 16 /* * 2 * BIN_SIZE_DIFF_FX */ 57 /* Criteria of weight of histogram peak to accept/reject feature */ 58 #define THRES_WEIGHT_FLAT_DIFF 154 /*(int)(0.3*(inst->modelUpdate)) for flatness and difference */ 59 60 #define STAT_UPDATES 9 /* Update every 512 = 1 << 9 block */ 61 #define ONE_MINUS_GAMMA_PAUSE_Q8 13 /* ~= Q8(0.05) Update for conservative noise estimate */ 62 #define GAMMA_NOISE_TRANS_AND_SPEECH_Q8 3 /* ~= Q8(0.01) Update for transition and noise region */ 63 64 #endif /* WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_NSX_DEFINES_H_ */ 65