/// <summary>
/// Build wideband submodes.
/// </summary>
/// <returns>the wideband submodes.</returns>
protected static internal SubMode[] BuildWbSubModes()
{
// Initialize Long Term Predictions
HighLspQuant highLU = new HighLspQuant();
// Initialize Codebook Searches
SplitShapeSearch ssCbHighLbrSearch = new SplitShapeSearch(40, 10, 4, NSpeex.Codebook_Constants.hexc_10_32_table, 5, 0);
SplitShapeSearch ssCbHighSearch = new SplitShapeSearch(40, 8, 5, NSpeex.Codebook_Constants.hexc_table, 7, 1);
// Initialize wide-band modes
SubMode[] wbSubModes = new SubMode[SB_SUBMODES];
wbSubModes[1] = new SubMode(0, 0, 1, 0, highLU, null, null, .75f, .75f, -1, 36);
wbSubModes[2] = new SubMode(0, 0, 1, 0, highLU, null, ssCbHighLbrSearch, .85f, .6f, -1, 112);
wbSubModes[3] = new SubMode(0, 0, 1, 0, highLU, null, ssCbHighSearch, .75f, .7f, -1, 192);
wbSubModes[4] = new SubMode(0, 0, 1, 1, highLU, null, ssCbHighSearch, .75f, .75f, -1, 352);
return(wbSubModes);
}
/// <summary>
/// Build narrowband submodes
/// </summary>
/// <returns></returns>
protected static SubMode[] buildNbSubModes()
{
/* Initialize Long Term Predictions */
Ltp3Tap ltpNb = new Ltp3Tap(Codebook.gain_cdbk_nb, 7, 7);
Ltp3Tap ltpVlbr = new Ltp3Tap(Codebook.gain_cdbk_lbr, 5, 0);
Ltp3Tap ltpLbr = new Ltp3Tap(Codebook.gain_cdbk_lbr, 5, 7);
Ltp3Tap ltpMed = new Ltp3Tap(Codebook.gain_cdbk_lbr, 5, 7);
LtpForcedPitch ltpFP = new LtpForcedPitch();
/* Initialize Codebook Searches */
NoiseSearch noiseSearch = new NoiseSearch();
SplitShapeSearch ssNbVlbrSearch = new SplitShapeSearch(40, 10, 4, Codebook.exc_10_16_table, 4, 0);
SplitShapeSearch ssNbLbrSearch = new SplitShapeSearch(40, 10, 4, Codebook.exc_10_32_table, 5, 0);
SplitShapeSearch ssNbSearch = new SplitShapeSearch(40, 5, 8, Codebook.exc_5_64_table, 6, 0);
SplitShapeSearch ssNbMedSearch = new SplitShapeSearch(40, 8, 5, Codebook.exc_8_128_table, 7, 0);
SplitShapeSearch ssSbSearch = new SplitShapeSearch(40, 5, 8, Codebook.exc_5_256_table, 8, 0);
SplitShapeSearch ssNbUlbrSearch = new SplitShapeSearch(40, 20, 2, Codebook.exc_20_32_table, 5, 0);
/* Initialize Line Spectral Pair Quantizers */
NbLspQuant nbLspQuant = new NbLspQuant();
LbrLspQuant lbrLspQuant = new LbrLspQuant();
/* Initialize narrow-band modes */
SubMode[] nbSubModes = new SubMode[NB_SUBMODES];
/* 2150 bps "vocoder-like" mode for comfort noise */
nbSubModes[1] = new SubMode(0, 1, 0, 0, lbrLspQuant, ltpFP, noiseSearch, .7f, .7f, -1, 43);
/* 5.95 kbps very low bit-rate mode */
nbSubModes[2] = new SubMode(0, 0, 0, 0, lbrLspQuant, ltpVlbr, ssNbVlbrSearch, 0.7f, 0.5f, .55f, 119);
/* 8 kbps low bit-rate mode */
nbSubModes[3] = new SubMode(-1, 0, 1, 0, lbrLspQuant, ltpLbr, ssNbLbrSearch, 0.7f, 0.55f, .45f, 160);
/* 11 kbps medium bit-rate mode */
nbSubModes[4] = new SubMode(-1, 0, 1, 0, lbrLspQuant, ltpMed, ssNbMedSearch, 0.7f, 0.63f, .35f, 220);
/* 15 kbps high bit-rate mode */
nbSubModes[5] = new SubMode(-1, 0, 3, 0, nbLspQuant, ltpNb, ssNbSearch, 0.7f, 0.65f, .25f, 300);
/* 18.2 high bit-rate mode */
nbSubModes[6] = new SubMode(-1, 0, 3, 0, nbLspQuant, ltpNb, ssSbSearch, 0.68f, 0.65f, .1f, 364);
/* 24.6 kbps high bit-rate mode */
nbSubModes[7] = new SubMode(-1, 0, 3, 1, nbLspQuant, ltpNb, ssNbSearch, 0.65f, 0.65f, -1, 492);
/* 3.95 kbps very low bit-rate mode */
nbSubModes[8] = new SubMode(0, 1, 0, 0, lbrLspQuant, ltpFP, ssNbUlbrSearch, .7f, .5f, .65f, 79);
/* Return the Narrowband SubModes*/
return(nbSubModes);
}
