Package org.xiph.speex
Class NbEncoder
- java.lang.Object
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- org.xiph.speex.NbCodec
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- org.xiph.speex.NbEncoder
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Field Summary
Fields Modifier and Type Field Description protected float
abr_count
protected float
abr_drift
Relative quality that will be needed by VBRprotected float
abr_drift2
protected int
abr_enabled
1 for enabling VAD, 0 otherwiseprivate float[]
autocorr
2nd temporary bufferprivate int
bounded_pitch
private float[]
buf2
Temporary (Hanning) windowprivate float[]
bw_lpc1
Interpolated LPCsprivate float[]
bw_lpc2
LPCs after bandwidth expansion by gamma1 for perceptual weightingprotected int
complexity
private int
dtx_count
State of the VBR dataprivate float[]
exc2Buf
1-element memory for pre-emphasisprivate int
exc2Idx
"Pitch enhanced" excitationprivate float[]
innov2
Number of consecutive DTX framesprivate float[]
interp_lpc
Interpolated LSPsprivate float[]
interp_lsp
LSPs for previous frameprivate float[]
lagWindow
auto-correlationprivate float[]
lsp
Window applied to auto-correlationprivate float[]
mem_exc
Filter memory for perceptually-weighted signal (whole frame)private float[]
mem_sw
Reflection coefficientsprivate float[]
mem_sw_whole
Filter memory for perceptually-weighted signalstatic int[]
NB_QUALITY_MAP
The Narrowband Quality map indicates which narrowband submode to use for the given narrowband quality settingprivate float[]
old_lsp
LSPs for current frameprivate int[]
pitch
Next frame should not rely on previous frames for pitchprivate float
pre_mem2
private float[]
rc
LPCs after bandwidth expansion by gamma2 for perceptual weightingprotected float
relative_quality
Quality setting for VBR encodingprotected int
sampling_rate
protected int
submodeSelect
private float[]
swBuf
"Pitch enhanced" excitationprivate int
swIdx
Weighted signal bufferprotected int
vad_enabled
1 for enabling VBR, 0 otherwiseprivate 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 offprivate float[]
window
Start of weighted signal frame-
Fields inherited from class org.xiph.speex.NbCodec
awk1, awk2, awk3, bufSize, dtx_enabled, exc_gain_quant_scal1, exc_gain_quant_scal3, excBuf, excIdx, filters, first, frameSize, frmBuf, frmIdx, gamma1, gamma2, innov, interp_qlpc, interp_qlsp, lag_factor, lpc, lpc_floor, lpcSize, m_lsp, max_pitch, mem_sp, min_pitch, NB_FRAME_SIZE, NB_SUBMODE_BITS, NB_SUBMODES, nbSubframes, old_qlsp, pi_gain, pre_mem, preemph, qlsp, subframeSize, submodeID, submodes, VERY_SMALL, voc_m1, voc_m2, voc_mean, voc_offset, windowSize
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Fields inherited from interface org.xiph.speex.Codebook
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, NB_CDBK_SIZE, NB_CDBK_SIZE_HIGH1, NB_CDBK_SIZE_HIGH2, NB_CDBK_SIZE_LOW1, NB_CDBK_SIZE_LOW2
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Constructor Summary
Constructors Constructor Description NbEncoder()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description 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)
Initialisationvoid
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 Qualityvoid
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
getDtx, getExc, getFrameSize, getInnov, getPiGain, nbinit
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Field Detail
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NB_QUALITY_MAP
public static final int[] NB_QUALITY_MAP
The Narrowband Quality map indicates which narrowband submode to use for the given narrowband quality setting
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bounded_pitch
private int bounded_pitch
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pitch
private int[] pitch
Next frame should not rely on previous frames for pitch
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pre_mem2
private float pre_mem2
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exc2Buf
private float[] exc2Buf
1-element memory for pre-emphasis
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exc2Idx
private int exc2Idx
"Pitch enhanced" excitation
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swBuf
private float[] swBuf
"Pitch enhanced" excitation
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swIdx
private int swIdx
Weighted signal buffer
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window
private float[] window
Start of weighted signal frame
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buf2
private float[] buf2
Temporary (Hanning) window
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autocorr
private float[] autocorr
2nd temporary buffer
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lagWindow
private float[] lagWindow
auto-correlation
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lsp
private float[] lsp
Window applied to auto-correlation
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old_lsp
private float[] old_lsp
LSPs for current frame
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interp_lsp
private float[] interp_lsp
LSPs for previous frame
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interp_lpc
private float[] interp_lpc
Interpolated LSPs
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bw_lpc1
private float[] bw_lpc1
Interpolated LPCs
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bw_lpc2
private float[] bw_lpc2
LPCs after bandwidth expansion by gamma1 for perceptual weighting
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rc
private float[] rc
LPCs after bandwidth expansion by gamma2 for perceptual weighting
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mem_sw
private float[] mem_sw
Reflection coefficients
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mem_sw_whole
private float[] mem_sw_whole
Filter memory for perceptually-weighted signal
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mem_exc
private float[] mem_exc
Filter memory for perceptually-weighted signal (whole frame)
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vbr
private Vbr vbr
Filter memory for excitation (whole frame)
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dtx_count
private int dtx_count
State of the VBR data
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innov2
private float[] innov2
Number of consecutive DTX frames
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complexity
protected int complexity
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vbr_enabled
protected int vbr_enabled
Complexity setting (0-10 from least complex to most complex)
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vad_enabled
protected int vad_enabled
1 for enabling VBR, 0 otherwise
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abr_enabled
protected int abr_enabled
1 for enabling VAD, 0 otherwise
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vbr_quality
protected float vbr_quality
ABR setting (in bps), 0 if off
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relative_quality
protected float relative_quality
Quality setting for VBR encoding
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abr_drift
protected float abr_drift
Relative quality that will be needed by VBR
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abr_drift2
protected float abr_drift2
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abr_count
protected float abr_count
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sampling_rate
protected int sampling_rate
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submodeSelect
protected int submodeSelect
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Method Detail
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init
public void init(int frameSize, int subframeSize, int lpcSize, int bufSize)
Initialisation
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encode
public int encode(Bits bits, float[] in)
Encode the given input signal.
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getEncodedFrameSize
public int getEncodedFrameSize()
Returns the size in bits of an audio frame encoded with the current mode.- Specified by:
getEncodedFrameSize
in interfaceEncoder
- Returns:
- the size in bits of an audio frame encoded with the current mode.
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setQuality
public void setQuality(int quality)
Sets the Quality- Specified by:
setQuality
in interfaceEncoder
- Parameters:
quality
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getBitRate
public int getBitRate()
Gets the bitrate.- Specified by:
getBitRate
in interfaceEncoder
- Returns:
- the bitrate.
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setMode
public void setMode(int mode)
Sets the encoding submode.
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getMode
public int getMode()
Returns the encoding submode currently in use.
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setBitRate
public void setBitRate(int bitrate)
Sets the bitrate.- Specified by:
setBitRate
in interfaceEncoder
- Parameters:
bitrate
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setVbr
public void setVbr(boolean vbr)
Sets whether or not to use Variable Bit Rate encoding.
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getVbr
public boolean getVbr()
Returns whether or not we are using Variable Bit Rate encoding.
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setVad
public void setVad(boolean vad)
Sets whether or not to use Voice Activity Detection encoding.
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getVad
public boolean getVad()
Returns whether or not we are using Voice Activity Detection encoding.
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setDtx
public void setDtx(boolean dtx)
Sets whether or not to use Discontinuous Transmission encoding.
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getAbr
public int getAbr()
Returns the Average Bit Rate used (0 if ABR is not turned on).
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setAbr
public void setAbr(int abr)
Sets the Average Bit Rate.
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setVbrQuality
public void setVbrQuality(float quality)
Sets the Varible Bit Rate Quality.- Specified by:
setVbrQuality
in interfaceEncoder
- Parameters:
quality
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getVbrQuality
public float getVbrQuality()
Returns the Varible Bit Rate Quality.- Specified by:
getVbrQuality
in interfaceEncoder
- Returns:
- the Varible Bit Rate Quality.
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setComplexity
public void setComplexity(int complexity)
Sets the algorthmic complexity.- Specified by:
setComplexity
in interfaceEncoder
- Parameters:
complexity
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getComplexity
public int getComplexity()
Returns the algorthmic complexity.- Specified by:
getComplexity
in interfaceEncoder
- Returns:
- the algorthmic complexity.
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setSamplingRate
public void setSamplingRate(int rate)
Sets the sampling rate.- Specified by:
setSamplingRate
in interfaceEncoder
- Parameters:
rate
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getSamplingRate
public int getSamplingRate()
Returns the sampling rate.- Specified by:
getSamplingRate
in interfaceEncoder
- Returns:
- the sampling rate.
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getLookAhead
public int getLookAhead()
Return LookAhead.- Specified by:
getLookAhead
in interfaceEncoder
- Returns:
- LookAhead.
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getRelativeQuality
public float getRelativeQuality()
Returns the relative quality.- Specified by:
getRelativeQuality
in interfaceEncoder
- Returns:
- the relative quality.
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