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AAC/SBR encoder improvements
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* AAC-Encoder

  - AAC-ELD core encoder audio quality tuning. Update tuning tables, configure
    bitreservoir size and adapt afterburner iteration value.
     Modified file(s):
        libAACenc/src/aacenc.h
        libAACenc/src/aacenc_lib.cpp
        libAACenc/src/adj_thr.cpp
        libAACenc/src/adj_thr.h
        libAACenc/src/adj_thr_data.h
        libAACenc/src/bandwidth.cpp
        libAACenc/src/pnsparam.cpp
        libAACenc/src/qc_main.cpp

   - Introduze dead zone quantizer for ELD to improve audio quality at certain
     configurations.
     Modified file(s):
        libAACenc/src/aacenc_lib.cpp
        libAACenc/src/adj_thr.cpp
        libAACenc/src/adj_thr.h
        libAACenc/src/qc_data.h
        libAACenc/src/qc_main.cpp
        libAACenc/src/quantize.cpp
        libAACenc/src/quantize.h
        libAACenc/src/sf_estim.cpp
        libAACenc/src/sf_estim.h

   - Revise TNS module to improve ELD audio quality.
   - Use new window function and separate prediction gain according TNS filters.
   - Add missing memory initilization to TNS configuration.
     Modified file(s):
        libAACenc/src/aacenc_lib.cpp
        libAACenc/src/aacenc_tns.cpp
        libAACenc/src/aacenc_tns.h
        libAACenc/src/psy_main.cpp
        libAACenc/src/tns_func.h

* SBR-Encoder

   - Revise frequency resolution calculation and handle differently depending
     on number of envelopes and split frames decision.
   - Add and adjust ELD SBR tuning tables.
     Modified file(s):
        libSBRenc/include/sbr_encoder.h
        libSBRenc/src/bit_sbr.h
        libSBRenc/src/env_est.cpp
        libSBRenc/src/fram_gen.cpp
        libSBRenc/src/fram_gen.h
        libSBRenc/src/mh_det.cpp
        libSBRenc/src/sbr_def.h
        libSBRenc/src/sbr_encoder.cpp
        libSBRenc/src/sbr_rom.cpp
        libSBRenc/src/tran_det.cpp

   - Replace ELD transient detector with fast implementation.
     Modified file(s):
        libSBRenc/src/env_est.cpp
        libSBRenc/src/env_est.h
        libSBRenc/src/fram_gen.cpp
        libSBRenc/src/sbr_def.h
        libSBRenc/src/sbr_encoder.cpp
        libSBRenc/src/tran_det.cpp
        libSBRenc/src/tran_det.h

* FDK-Library
   - Introduce generic compare function in tools library.
     Modified file(s):
        libFDK/include/fixpoint_math.h
        libFDK/src/FDK_core.cpp

* SBR-Encoder

  -  Revise ELD frame splitter to improve bit distribution.
     Modified file(s):
        libSBRenc/include/sbr_encoder.h
        libSBRenc/src/bit_sbr.h
        libSBRenc/src/env_est.cpp
        libSBRenc/src/fram_gen.cpp
        libSBRenc/src/fram_gen.h
        libSBRenc/src/sbr_encoder.cpp
        libSBRenc/src/tran_det.cpp
        libSBRenc/src/tran_det.h

   - Configure amplitude resolution according the tonality of the audio signal.
     Modified file(s):
        libSBRenc/include/sbr_encoder.h
        libSBRenc/src/bit_sbr.h
        libSBRenc/src/env_est.cpp
        libSBRenc/src/nf_est.cpp
        libSBRenc/src/nf_est.h
        libSBRenc/src/sbr_def.h
        libSBRenc/src/sbr_encoder.cpp
        libSBRenc/src/ton_corr.cpp
        libSBRenc/src/ton_corr.h
        libSBRenc/src/tran_det.cpp
        libSBRenc/src/tran_det.h

Change-Id: Ie0672b989a06ee63b50240616b8d1d4b790b6cb2
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@jmtrivi
jmtrivi committed Apr 8, 2016
1 parent 4834f01 commit 46ba367
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Showing 35 changed files with 1,206 additions and 327 deletions.
5 changes: 5 additions & 0 deletions libAACenc/src/aacenc.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,11 @@ amm-info@iis.fraunhofer.de

#include "sbr_encoder.h"

#define BITRES_MAX_LD 4000
#define BITRES_MIN_LD 500
#define BITRATE_MAX_LD 70000 /* Max assumed bitrate for bitres calculation */
#define BITRATE_MIN_LD 12000 /* Min assumed bitrate for bitres calculation */

#ifdef __cplusplus
extern "C" {
#endif
Expand Down
15 changes: 10 additions & 5 deletions libAACenc/src/aacenc_lib.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -98,7 +98,7 @@ amm-info@iis.fraunhofer.de
/* Encoder library info */
#define AACENCODER_LIB_VL0 3
#define AACENCODER_LIB_VL1 4
#define AACENCODER_LIB_VL2 19
#define AACENCODER_LIB_VL2 22
#define AACENCODER_LIB_TITLE "AAC Encoder"
#ifdef __ANDROID__
#define AACENCODER_LIB_BUILD_DATE ""
Expand Down Expand Up @@ -813,11 +813,16 @@ AACENC_ERROR FDKaacEnc_AdjustEncSettings(HANDLE_AACENCODER hAacEncoder,
switch ( hAacConfig->audioObjectType ) {
case AOT_ER_AAC_LD:
case AOT_ER_AAC_ELD:
if (config->userBitrateMode==8) {
hAacConfig->bitrateMode = 0;
}
if (config->userBitrateMode==0) {
hAacConfig->bitreservoir = 100*config->nChannels; /* default, reduced bitreservoir */
/* bitreservoir = (maxBitRes-minBitRes)/(maxBitRate-minBitrate)*(bitRate-minBitrate)+minBitRes; */
if ( isLowDelay(hAacConfig->audioObjectType) ) {
INT bitreservoir;
INT brPerChannel = hAacConfig->bitRate/hAacConfig->nChannels;
brPerChannel = fMin(BITRATE_MAX_LD, fMax(BITRATE_MIN_LD, brPerChannel));
FIXP_DBL slope = fDivNorm((brPerChannel-BITRATE_MIN_LD), BITRATE_MAX_LD-BITRATE_MIN_LD); /* calc slope for interpolation */
bitreservoir = fMultI(slope, (INT)(BITRES_MAX_LD-BITRES_MIN_LD)) + BITRES_MIN_LD; /* interpolate */
hAacConfig->bitreservoir = bitreservoir & ~7; /* align to bytes */
}
}
if (hAacConfig->bitrateMode!=0) {
return AACENC_INVALID_CONFIG;
Expand Down
102 changes: 47 additions & 55 deletions libAACenc/src/aacenc_tns.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
/* -----------------------------------------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
All rights reserved.
1. INTRODUCTION
Expand Down Expand Up @@ -95,13 +95,7 @@ amm-info@iis.fraunhofer.de
#include "aacEnc_rom.h"
#include "aacenc_tns.h"

enum {
HIFILT = 0, /* index of higher filter */
LOFILT = 1 /* index of lower filter */
};


#define FILTER_DIRECTION 0
#define FILTER_DIRECTION 0 /* 0 = up, 1 = down */

static const FIXP_DBL acfWindowLong[12+3+1] = {
0x7fffffff,0x7fb80000,0x7ee00000,0x7d780000,0x7b800000,0x78f80000,0x75e00000,0x72380000,
Expand All @@ -112,20 +106,6 @@ static const FIXP_DBL acfWindowShort[4+3+1] = {
0x7fffffff,0x7e000000,0x78000000,0x6e000000,0x60000000,0x4e000000,0x38000000,0x1e000000
};


typedef struct {
INT filterEnabled[MAX_NUM_OF_FILTERS];
INT threshOn[MAX_NUM_OF_FILTERS]; /* min. prediction gain for using tns TABUL*/
INT filterStartFreq[MAX_NUM_OF_FILTERS]; /* lowest freq for lpc TABUL*/
INT tnsLimitOrder[MAX_NUM_OF_FILTERS]; /* Limit for TNS order TABUL*/
INT tnsFilterDirection[MAX_NUM_OF_FILTERS]; /* Filtering direction, 0=up, 1=down TABUL */
INT acfSplit[MAX_NUM_OF_FILTERS];
FIXP_DBL tnsTimeResolution[MAX_NUM_OF_FILTERS]; /* TNS max. time resolution TABUL. Should be fract but MSVC won't compile then */
INT seperateFiltersAllowed;

} TNS_PARAMETER_TABULATED;


typedef struct{
INT bitRateFrom[2]; /* noneSbr=0, useSbr=1 */
INT bitRateTo[2]; /* noneSbr=0, useSbr=1 */
Expand Down Expand Up @@ -373,6 +353,7 @@ AAC_ENCODER_ERROR FDKaacEnc_InitTnsConfiguration(INT bitRate,
INT channels,
INT blockType,
INT granuleLength,
INT isLowDelay,
INT ldSbrPresent,
TNS_CONFIG *tC,
PSY_CONFIGURATION *pC,
Expand All @@ -385,6 +366,8 @@ AAC_ENCODER_ERROR FDKaacEnc_InitTnsConfiguration(INT bitRate,
if (channels <= 0)
return (AAC_ENCODER_ERROR)1;

tC->isLowDelay = isLowDelay;

/* initialize TNS filter flag, order, and coefficient resolution (in bits per coeff) */
tC->tnsActive = (active) ? TRUE : FALSE;
tC->maxOrder = (blockType == SHORT_WINDOW) ? 5 : 12; /* maximum: 7, 20 */
Expand Down Expand Up @@ -450,27 +433,14 @@ AAC_ENCODER_ERROR FDKaacEnc_InitTnsConfiguration(INT bitRate,
const TNS_PARAMETER_TABULATED* pCfg = FDKaacEnc_GetTnsParam(bitRate, channels, ldSbrPresent);

if ( pCfg != NULL ) {

FDKmemcpy(&(tC->confTab), pCfg, sizeof(tC->confTab));

tC->lpcStartBand[HIFILT] = FDKaacEnc_FreqToBandWithRounding(pCfg->filterStartFreq[HIFILT], sampleRate, pC->sfbCnt, pC->sfbOffset);
tC->lpcStartLine[HIFILT] = pC->sfbOffset[tC->lpcStartBand[HIFILT]];
tC->lpcStartBand[LOFILT] = FDKaacEnc_FreqToBandWithRounding(pCfg->filterStartFreq[LOFILT], sampleRate, pC->sfbCnt, pC->sfbOffset);
tC->lpcStartLine[LOFILT] = pC->sfbOffset[tC->lpcStartBand[LOFILT]];

tC->confTab.threshOn[HIFILT] = pCfg->threshOn[HIFILT];
tC->confTab.threshOn[LOFILT] = pCfg->threshOn[LOFILT];

tC->confTab.tnsLimitOrder[HIFILT] = pCfg->tnsLimitOrder[HIFILT];
tC->confTab.tnsLimitOrder[LOFILT] = pCfg->tnsLimitOrder[LOFILT];

tC->confTab.tnsFilterDirection[HIFILT] = pCfg->tnsFilterDirection[HIFILT];
tC->confTab.tnsFilterDirection[LOFILT] = pCfg->tnsFilterDirection[LOFILT];

tC->confTab.acfSplit[HIFILT] = pCfg->acfSplit[HIFILT];
tC->confTab.acfSplit[LOFILT] = pCfg->acfSplit[LOFILT];

tC->confTab.filterEnabled[HIFILT] = pCfg->filterEnabled[HIFILT];
tC->confTab.filterEnabled[LOFILT] = pCfg->filterEnabled[LOFILT];
tC->confTab.seperateFiltersAllowed = pCfg->seperateFiltersAllowed;

FDKaacEnc_CalcGaussWindow(tC->acfWindow[HIFILT], tC->maxOrder+1, sampleRate, granuleLength, pCfg->tnsTimeResolution[HIFILT], TNS_TIMERES_SCALE);
FDKaacEnc_CalcGaussWindow(tC->acfWindow[LOFILT], tC->maxOrder+1, sampleRate, granuleLength, pCfg->tnsTimeResolution[LOFILT], TNS_TIMERES_SCALE);
}
Expand Down Expand Up @@ -614,6 +584,7 @@ static inline FIXP_DBL FDKaacEnc_AutoCorrNormFac(

static void FDKaacEnc_MergedAutoCorrelation(
const FIXP_DBL *spectrum,
const INT isLowDelay,
const FIXP_DBL acfWindow[MAX_NUM_OF_FILTERS][TNS_MAX_ORDER+3+1],
const INT lpcStartLine[MAX_NUM_OF_FILTERS],
const INT lpcStopLine,
Expand All @@ -633,6 +604,8 @@ static void FDKaacEnc_MergedAutoCorrelation(
FDKmemclear(&_rxx1[0], sizeof(FIXP_DBL)*(maxOrder+1));
FDKmemclear(&_rxx2[0], sizeof(FIXP_DBL)*(maxOrder+1));

idx0 = idx1 = idx2 = idx3 = idx4 = 0;

/* MDCT line indices separating the 1st, 2nd, 3rd, and 4th analysis quarters */
if ( (acfSplit[LOFILT]==-1) || (acfSplit[HIFILT]==-1) ) {
/* autocorrelation function for 1st, 2nd, 3rd, and 4th quarter of the spectrum */
Expand Down Expand Up @@ -676,17 +649,27 @@ static void FDKaacEnc_MergedAutoCorrelation(
/* compute energy normalization factors, i. e. 1/energy (saves some divisions) */
if (rxx1_0 != FL2FXCONST_DBL(0.f))
{
INT sc_fac1 = -1;
FIXP_DBL fac1 = FDKaacEnc_AutoCorrNormFac(rxx1_0, ((-2*sc1)+nsc1), &sc_fac1);
_rxx1[0] = scaleValue(fMult(rxx1_0,fac1),sc_fac1);
INT sc_fac1 = -1;
FIXP_DBL fac1 = FDKaacEnc_AutoCorrNormFac(rxx1_0, ((-2*sc1)+nsc1), &sc_fac1);
_rxx1[0] = scaleValue(fMult(rxx1_0,fac1),sc_fac1);

if (isLowDelay)
{
for (lag = 1; lag <= maxOrder; lag++) {
/* compute energy-normalized and windowed autocorrelation values at this lag */
FIXP_DBL x1 = FDKaacEnc_CalcAutoCorrValue(pSpectrum, idx0, idx1, lag, nsc1);
_rxx1[lag] = fMult(scaleValue(fMult(x1,fac1),sc_fac1), acfWindow[LOFILT][lag]);
}
}
else
{
for (lag = 1; lag <= maxOrder; lag++) {
if ((3 * lag) <= maxOrder + 3) {
FIXP_DBL x1 = FDKaacEnc_CalcAutoCorrValue(pSpectrum, idx0, idx1, lag, nsc1);
_rxx1[lag] = fMult(scaleValue(fMult(x1,fac1),sc_fac1), acfWindow[LOFILT][3*lag]);
}
}
}
}

/* auto corr over upper 3/4 of spectrum */
Expand Down Expand Up @@ -762,8 +745,12 @@ INT FDKaacEnc_TnsDetect(
: &tnsData->dataRaw.Long.subBlockInfo;

tnsData->filtersMerged = FALSE;
tsbi->tnsActive = FALSE;
tsbi->predictionGain = 1000;

tsbi->tnsActive[HIFILT] = FALSE;
tsbi->predictionGain[HIFILT] = 1000;
tsbi->tnsActive[LOFILT] = FALSE;
tsbi->predictionGain[LOFILT] = 1000;

tnsInfo->numOfFilters[subBlockNumber] = 0;
tnsInfo->coefRes[subBlockNumber] = tC->coefRes;
for (i = 0; i < tC->maxOrder; i++) {
Expand All @@ -779,6 +766,7 @@ INT FDKaacEnc_TnsDetect(

FDKaacEnc_MergedAutoCorrelation(
spectrum,
tC->isLowDelay,
tC->acfWindow,
tC->lpcStartLine,
tC->lpcStopLine,
Expand All @@ -788,7 +776,7 @@ INT FDKaacEnc_TnsDetect(
rxx2);

/* compute higher TNS filter in lattice (ParCor) form with LeRoux-Gueguen algorithm */
tsbi->predictionGain = FDKaacEnc_AutoToParcor(rxx2, parcor_tmp, tC->confTab.tnsLimitOrder[HIFILT]);
tsbi->predictionGain[HIFILT] = FDKaacEnc_AutoToParcor(rxx2, parcor_tmp, tC->confTab.tnsLimitOrder[HIFILT]);

/* non-linear quantization of TNS lattice coefficients with given resolution */
FDKaacEnc_Parcor2Index(
Expand All @@ -815,9 +803,9 @@ INT FDKaacEnc_TnsDetect(
tnsInfo->length[subBlockNumber][HIFILT] = sfbCnt - tC->lpcStartBand[HIFILT];

/* disable TNS if predictionGain is less than 3dB or sumSqrCoef is too small */
if ((tsbi->predictionGain > tC->confTab.threshOn[HIFILT]) || (sumSqrCoef > (tC->confTab.tnsLimitOrder[HIFILT]/2 + 2)))
if ((tsbi->predictionGain[HIFILT] > tC->confTab.threshOn[HIFILT]) || (sumSqrCoef > (tC->confTab.tnsLimitOrder[HIFILT]/2 + 2)))
{
tsbi->tnsActive = TRUE;
tsbi->tnsActive[HIFILT] = TRUE;
tnsInfo->numOfFilters[subBlockNumber]++;

/* compute second filter for lower quarter; only allowed for long windows! */
Expand Down Expand Up @@ -857,6 +845,7 @@ INT FDKaacEnc_TnsDetect(
|| ( (sumSqrCoef > 9) && (sumSqrCoef < 22 * tC->confTab.tnsLimitOrder[LOFILT]) ) )
{
/* compare lower to upper filter; if they are very similar, merge them */
tsbi->tnsActive[LOFILT] = TRUE;
sumSqrCoef = 0;
for (i = 0; i < tC->confTab.tnsLimitOrder[LOFILT]; i++) {
sumSqrCoef += FDKabs(tnsInfo->coef[subBlockNumber][HIFILT][i] - tnsInfo->coef[subBlockNumber][LOFILT][i]);
Expand Down Expand Up @@ -884,6 +873,8 @@ INT FDKaacEnc_TnsDetect(
tnsInfo->numOfFilters[subBlockNumber]++;
}
} /* filter lower part */
tsbi->predictionGain[LOFILT]=predGain;

} /* second filter allowed */
} /* if predictionGain > 1437 ... */
} /* maxOrder > 0 && tnsActive */
Expand Down Expand Up @@ -944,7 +935,7 @@ void FDKaacEnc_TnsSync(
INT doSync = 1, absDiffSum = 0;

/* if TNS is active in at least one channel, check if ParCor coefficients of higher filter are similar */
if (pSbInfoDestW->tnsActive || pSbInfoSrcW->tnsActive) {
if (pSbInfoDestW->tnsActive[HIFILT] || pSbInfoSrcW->tnsActive[HIFILT]) {
for (i = 0; i < tC->maxOrder; i++) {
absDiff = FDKabs(tnsInfoDest->coef[w][HIFILT][i] - tnsInfoSrc->coef[w][HIFILT][i]);
absDiffSum += absDiff;
Expand All @@ -957,12 +948,12 @@ void FDKaacEnc_TnsSync(

if (doSync) {
/* if no significant difference was detected, synchronize coefficient sets */
if (pSbInfoSrcW->tnsActive) {
if (pSbInfoSrcW->tnsActive[HIFILT]) {
/* no dest filter, or more dest than source filters: use one dest filter */
if ((!pSbInfoDestW->tnsActive) ||
((pSbInfoDestW->tnsActive) && (tnsInfoDest->numOfFilters[w] > tnsInfoSrc->numOfFilters[w])))
if ((!pSbInfoDestW->tnsActive[HIFILT]) ||
((pSbInfoDestW->tnsActive[HIFILT]) && (tnsInfoDest->numOfFilters[w] > tnsInfoSrc->numOfFilters[w])))
{
pSbInfoDestW->tnsActive = tnsInfoDest->numOfFilters[w] = 1;
pSbInfoDestW->tnsActive[HIFILT] = tnsInfoDest->numOfFilters[w] = 1;
}
tnsDataDest->filtersMerged = tnsDataSrc->filtersMerged;
tnsInfoDest->order [w][HIFILT] = tnsInfoSrc->order [w][HIFILT];
Expand All @@ -975,7 +966,7 @@ void FDKaacEnc_TnsSync(
}
}
else
pSbInfoDestW->tnsActive = tnsInfoDest->numOfFilters[w] = 0;
pSbInfoDestW->tnsActive[HIFILT] = tnsInfoDest->numOfFilters[w] = 0;
}
}

Expand Down Expand Up @@ -1012,8 +1003,8 @@ INT FDKaacEnc_TnsEncode(
{
INT i, startLine, stopLine;

if ( ( (blockType == SHORT_WINDOW) && (!tnsData->dataRaw.Short.subBlockInfo[subBlockNumber].tnsActive) )
|| ( (blockType != SHORT_WINDOW) && (!tnsData->dataRaw.Long.subBlockInfo.tnsActive) ) )
if ( ( (blockType == SHORT_WINDOW) && (!tnsData->dataRaw.Short.subBlockInfo[subBlockNumber].tnsActive[HIFILT]) )
|| ( (blockType != SHORT_WINDOW) && (!tnsData->dataRaw.Long.subBlockInfo.tnsActive[HIFILT]) ) )
{
return 1;
}
Expand Down Expand Up @@ -1129,8 +1120,9 @@ static INT FDKaacEnc_AutoToParcor(
FIXP_DBL *RESTRICT workBuffer = parcorWorkBuffer;
const FIXP_DBL autoCorr_0 = input[0];

FDKmemclear(reflCoeff,numOfCoeff*sizeof(FIXP_DBL));

if((FIXP_DBL)input[0] == FL2FXCONST_DBL(0.0)) {
FDKmemclear(reflCoeff,numOfCoeff*sizeof(FIXP_DBL));
return(predictionGain);
}

Expand Down
30 changes: 17 additions & 13 deletions libAACenc/src/aacenc_tns.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
/* -----------------------------------------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
All rights reserved.
1. INTRODUCTION
Expand Down Expand Up @@ -117,21 +117,25 @@ amm-info@iis.fraunhofer.de

#define MAX_NUM_OF_FILTERS 2

#define HIFILT 0 /* index of higher filter */
#define LOFILT 1 /* index of lower filter */

typedef struct{ /*stuff that is tabulated dependent on bitrate etc. */
INT filterEnabled[MAX_NUM_OF_FILTERS];
INT threshOn[MAX_NUM_OF_FILTERS]; /* min. prediction gain for using tns TABUL*/
INT tnsLimitOrder[MAX_NUM_OF_FILTERS]; /* Limit for TNS order TABUL*/
INT tnsFilterDirection[MAX_NUM_OF_FILTERS]; /* Filtering direction, 0=up, 1=down TABUL */
INT acfSplit[MAX_NUM_OF_FILTERS];
INT seperateFiltersAllowed;

}TNS_CONFIG_TABULATED;

typedef struct{ /* stuff that is tabulated dependent on bitrate etc. */
INT filterEnabled[MAX_NUM_OF_FILTERS];
INT threshOn[MAX_NUM_OF_FILTERS]; /* min. prediction gain for using tns TABUL*/
INT filterStartFreq[MAX_NUM_OF_FILTERS]; /* lowest freq for lpc TABUL*/
INT tnsLimitOrder[MAX_NUM_OF_FILTERS]; /* Limit for TNS order TABUL*/
INT tnsFilterDirection[MAX_NUM_OF_FILTERS]; /* Filtering direction, 0=up, 1=down TABUL */
INT acfSplit[MAX_NUM_OF_FILTERS];
FIXP_DBL tnsTimeResolution[MAX_NUM_OF_FILTERS]; /* TNS max. time resolution TABUL. Should be fract but MSVC won't compile then */
INT seperateFiltersAllowed;
} TNS_PARAMETER_TABULATED;


typedef struct { /*assigned at InitTime*/
TNS_CONFIG_TABULATED confTab;
TNS_PARAMETER_TABULATED confTab;
INT isLowDelay;
INT tnsActive;
INT maxOrder; /* max. order of tns filter */
INT coefRes;
Expand All @@ -148,8 +152,8 @@ typedef struct { /*assigned at InitTime*/


typedef struct {
INT tnsActive;
INT predictionGain;
INT tnsActive[MAX_NUM_OF_FILTERS];
INT predictionGain[MAX_NUM_OF_FILTERS];
} TNS_SUBBLOCK_INFO;

typedef struct{ /*changed at runTime*/
Expand Down
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