1 /* 2 * Copyright (c) 2011 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_DEFINES_H_ 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_DEFINES_H_ 13 14 //#define PROCESS_FLOW_0 // Use the traditional method. 15 //#define PROCESS_FLOW_1 // Use traditional with DD estimate of prior SNR. 16 #define PROCESS_FLOW_2 // Use the new method of speech/noise classification. 17 18 #define BLOCKL_MAX 160 // max processing block length: 160 19 #define ANAL_BLOCKL_MAX 256 // max analysis block length: 256 20 #define HALF_ANAL_BLOCKL 129 // half max analysis block length + 1 21 22 #define QUANTILE (float)0.25 23 24 #define SIMULT 3 25 #define END_STARTUP_LONG 200 26 #define END_STARTUP_SHORT 50 27 #define FACTOR (float)40.0 28 #define WIDTH (float)0.01 29 30 #define SMOOTH (float)0.75 // filter smoothing 31 // Length of fft work arrays. 32 #define IP_LENGTH (ANAL_BLOCKL_MAX >> 1) // must be at least ceil(2 + sqrt(ANAL_BLOCKL_MAX/2)) 33 #define W_LENGTH (ANAL_BLOCKL_MAX >> 1) 34 35 //PARAMETERS FOR NEW METHOD 36 #define DD_PR_SNR (float)0.98 // DD update of prior SNR 37 #define LRT_TAVG (float)0.50 // tavg parameter for LRT (previously 0.90) 38 #define SPECT_FL_TAVG (float)0.30 // tavg parameter for spectral flatness measure 39 #define SPECT_DIFF_TAVG (float)0.30 // tavg parameter for spectral difference measure 40 #define PRIOR_UPDATE (float)0.10 // update parameter of prior model 41 #define NOISE_UPDATE (float)0.90 // update parameter for noise 42 #define SPEECH_UPDATE (float)0.99 // update parameter when likely speech 43 #define WIDTH_PR_MAP (float)4.0 // width parameter in sigmoid map for prior model 44 #define LRT_FEATURE_THR (float)0.5 // default threshold for LRT feature 45 #define SF_FEATURE_THR (float)0.5 // default threshold for Spectral Flatness feature 46 #define SD_FEATURE_THR (float)0.5 // default threshold for Spectral Difference feature 47 #define PROB_RANGE (float)0.20 // probability threshold for noise state in 48 // speech/noise likelihood 49 #define HIST_PAR_EST 1000 // histogram size for estimation of parameters 50 #define GAMMA_PAUSE (float)0.05 // update for conservative noise estimate 51 // 52 #define B_LIM (float)0.5 // threshold in final energy gain factor calculation 53 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_DEFINES_H_ 54