Class NbEncoder

Field Summary
static int[]	NB_QUALITY_MAP The Narrowband Quality map indicates which narrowband submode to use for the given narrowband quality setting
protected float	abr_count
protected float	abr_drift Relative quality that will be needed by VBR
protected float	abr_drift2
protected int	abr_enabled 1 for enabling VAD, 0 otherwise
private float[]	autocorr 2nd temporary buffer
private int	bounded_pitch
private float[]	buf2 Temporary (Hanning) window
private float[]	bw_lpc1 Interpolated LPCs
private float[]	bw_lpc2 LPCs after bandwidth expansion by gamma1 for perceptual weighting
protected int	complexity
private int	dtx_count State of the VBR data
private float[]	exc2Buf 1-element memory for pre-emphasis
private int	exc2Idx "Pitch enhanced" excitation
private float[]	innov2 Number of consecutive DTX frames
private float[]	interp_lpc Interpolated LSPs
private float[]	interp_lsp LSPs for previous frame
private float[]	lagWindow auto-correlation
private float[]	lsp Window applied to auto-correlation
private float[]	mem_exc Filter memory for perceptually-weighted signal (whole frame)
private float[]	mem_sw Reflection coefficients
private float[]	mem_sw_whole Filter memory for perceptually-weighted signal
private float[]	old_lsp LSPs for current frame
private int[]	pitch Next frame should not rely on previous frames for pitch
private float	pre_mem2
private float[]	rc LPCs after bandwidth expansion by gamma2 for perceptual weighting
protected float	relative_quality Quality setting for VBR encoding
protected int	sampling_rate
protected int	submodeSelect
private float[]	swBuf "Pitch enhanced" excitation
private int	swIdx Weighted signal buffer
protected int	vad_enabled 1 for enabling VBR, 0 otherwise
private Vbr	vbr Filter memory for excitation (whole frame)
protected int	vbr_enabled Complexity setting (0-10 from least complex to most complex)
protected float	vbr_quality ABR setting (in bps), 0 if off
private float[]	window Start of weighted signal frame

Fields inherited from class org.xiph.speex.NbCodec

NB_FRAME_SIZE, NB_SUBMODES, NB_SUBMODE_BITS, VERY_SMALL, awk1, awk2, awk3, bufSize, dtx_enabled, excBuf, excIdx, exc_gain_quant_scal1, exc_gain_quant_scal3, filters, first, frameSize, frmBuf, frmIdx, gamma1, gamma2, innov, interp_qlpc, interp_qlsp, lag_factor, lpc, lpcSize, lpc_floor, m_lsp, max_pitch, mem_sp, min_pitch, nbSubframes, old_qlsp, pi_gain, pre_mem, preemph, qlsp, subframeSize, submodeID, submodes, voc_m1, voc_m2, voc_mean, voc_offset, windowSize

Fields inherited from interface org.xiph.speex.Codebook

NB_CDBK_SIZE, NB_CDBK_SIZE_HIGH1, NB_CDBK_SIZE_HIGH2, NB_CDBK_SIZE_LOW1, NB_CDBK_SIZE_LOW2, cdbk_nb, cdbk_nb_high1, cdbk_nb_high2, cdbk_nb_low1, cdbk_nb_low2, exc_10_16_table, exc_10_32_table, exc_20_32_table, exc_5_256_table, exc_5_64_table, exc_8_128_table, gain_cdbk_lbr, gain_cdbk_nb, h0, h1, hexc_10_32_table, hexc_table, high_lsp_cdbk, high_lsp_cdbk2

Method Summary
int	encode(Bits bits, float[] in) Encode the given input signal.
int	getAbr() Returns the Average Bit Rate used (0 if ABR is not turned on).
int	getBitRate() Gets the bitrate.
int	getComplexity() Returns the algorthmic complexity.
int	getEncodedFrameSize() Returns the size in bits of an audio frame encoded with the current mode.
int	getLookAhead() Return LookAhead.
int	getMode() Returns the encoding submode currently in use.
float	getRelativeQuality() Returns the relative quality.
int	getSamplingRate() Returns the sampling rate.
boolean	getVad() Returns whether or not we are using Voice Activity Detection encoding.
boolean	getVbr() Returns whether or not we are using Variable Bit Rate encoding.
float	getVbrQuality() Returns the Varible Bit Rate Quality.
void	init(int frameSize, int subframeSize, int lpcSize, int bufSize) Initialisation
void	setAbr(int abr) Sets the Average Bit Rate.
void	setBitRate(int bitrate) Sets the bitrate.
void	setComplexity(int complexity) Sets the algorthmic complexity.
void	setDtx(boolean dtx) Sets whether or not to use Discontinuous Transmission encoding.
void	setMode(int mode) Sets the encoding submode.
void	setQuality(int quality) Sets the Quality
void	setSamplingRate(int rate) Sets the sampling rate.
void	setVad(boolean vad) Sets whether or not to use Voice Activity Detection encoding.
void	setVbr(boolean vbr) Sets whether or not to use Variable Bit Rate encoding.
void	setVbrQuality(float quality) Sets the Varible Bit Rate Quality.

Methods inherited from class org.xiph.speex.NbCodec

buildNbSubModes, getDtx, getExc, getFrameSize, getInnov, getPiGain, init, nbinit

Field Details

Method Details