webrtc/modules/audio_processing/ns/defines.h

/*
 *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_DEFINES_H_
#define WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_DEFINES_H_

//#define PROCESS_FLOW_0    // Use the traditional method.
//#define PROCESS_FLOW_1    // Use traditional with DD estimate of prior SNR.
#define PROCESS_FLOW_2    // Use the new method of speech/noise classification.

#define BLOCKL_MAX          160 // max processing block length: 160
#define ANAL_BLOCKL_MAX     256 // max analysis block length: 256
#define HALF_ANAL_BLOCKL    129 // half max analysis block length + 1

#define QUANTILE            (float)0.25

#define SIMULT              3
#define END_STARTUP_LONG    200
#define END_STARTUP_SHORT   50
#define FACTOR              (float)40.0
#define WIDTH               (float)0.01

#define SMOOTH              (float)0.75 // filter smoothing
// Length of fft work arrays.
#define IP_LENGTH (ANAL_BLOCKL_MAX >> 1) // must be at least ceil(2 + sqrt(ANAL_BLOCKL_MAX/2))
#define W_LENGTH (ANAL_BLOCKL_MAX >> 1)

//PARAMETERS FOR NEW METHOD
#define DD_PR_SNR           (float)0.98 // DD update of prior SNR
#define LRT_TAVG            (float)0.50 // tavg parameter for LRT (previously 0.90)
#define SPECT_FL_TAVG       (float)0.30 // tavg parameter for spectral flatness measure
#define SPECT_DIFF_TAVG     (float)0.30 // tavg parameter for spectral difference measure
#define PRIOR_UPDATE        (float)0.10 // update parameter of prior model
#define NOISE_UPDATE        (float)0.90 // update parameter for noise
#define SPEECH_UPDATE       (float)0.99 // update parameter when likely speech
#define WIDTH_PR_MAP        (float)4.0  // width parameter in sigmoid map for prior model
#define LRT_FEATURE_THR     (float)0.5  // default threshold for LRT feature
#define SF_FEATURE_THR      (float)0.5  // default threshold for Spectral Flatness feature
#define SD_FEATURE_THR      (float)0.5  // default threshold for Spectral Difference feature
#define PROB_RANGE          (float)0.20 // probability threshold for noise state in
                                        // speech/noise likelihood
#define HIST_PAR_EST         1000       // histogram size for estimation of parameters
#define GAMMA_PAUSE         (float)0.05 // update for conservative noise estimate
//
#define B_LIM               (float)0.5  // threshold in final energy gain factor calculation
#endif // WEBRTC_MODULES_AUDIO_PROCESSING_NS_MAIN_SOURCE_DEFINES_H_