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Summary: Nested | Field | Method | Constr | Detail: Nested | Field | Method | Constr |
java.lang.Object
org.xiph.speex.NbCodec
org.xiph.speex.NbEncoder
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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 | |
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Methods inherited from class org.xiph.speex.NbCodec | |
buildNbSubModes , getDtx , getExc , getFrameSize , getInnov , getPiGain , init , nbinit |
public static final 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
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
public int encode(Bits bits, float[] in)
Encode the given input signal.
- Parameters:
bits
- - Speex bits buffer.in
- - the raw mono audio frame to encode.
- Returns:
- return 1 if successful.
public int getAbr()
Returns the Average Bit Rate used (0 if ABR is not turned on).
- Returns:
- the Average Bit Rate used (0 if ABR is not turned on).
public int getBitRate()
Gets the bitrate.
- Specified by:
- getBitRate in interface Encoder
- Returns:
- the bitrate.
public int getComplexity()
Returns the algorthmic complexity.
- Specified by:
- getComplexity in interface Encoder
- Returns:
- the algorthmic complexity.
public int getEncodedFrameSize()
Returns the size in bits of an audio frame encoded with the current mode.
- Specified by:
- getEncodedFrameSize in interface Encoder
- Returns:
- the size in bits of an audio frame encoded with the current mode.
public int getLookAhead()
Return LookAhead.
- Specified by:
- getLookAhead in interface Encoder
- Returns:
- LookAhead.
public int getMode()
Returns the encoding submode currently in use.
- Returns:
- the encoding submode currently in use.
public float getRelativeQuality()
Returns the relative quality.
- Specified by:
- getRelativeQuality in interface Encoder
- Returns:
- the relative quality.
public int getSamplingRate()
Returns the sampling rate.
- Specified by:
- getSamplingRate in interface Encoder
- Returns:
- the sampling rate.
public boolean getVad()
Returns whether or not we are using Voice Activity Detection encoding.
- Returns:
- whether or not we are using Voice Activity Detection encoding.
public boolean getVbr()
Returns whether or not we are using Variable Bit Rate encoding.
- Returns:
- whether or not we are using Variable Bit Rate encoding.
public float getVbrQuality()
Returns the Varible Bit Rate Quality.
- Specified by:
- getVbrQuality in interface Encoder
- Returns:
- the Varible Bit Rate Quality.
public void init(int frameSize, int subframeSize, int lpcSize, int bufSize)
Initialisation
- Parameters:
frameSize
-subframeSize
-lpcSize
-bufSize
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public void setAbr(int abr)
Sets the Average Bit Rate.
- Parameters:
abr
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public void setBitRate(int bitrate)
Sets the bitrate.
- Specified by:
- setBitRate in interface Encoder
- Parameters:
bitrate
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public void setComplexity(int complexity)
Sets the algorthmic complexity.
- Specified by:
- setComplexity in interface Encoder
- Parameters:
complexity
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public void setDtx(boolean dtx)
Sets whether or not to use Discontinuous Transmission encoding.
- Parameters:
dtx
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public void setMode(int mode)
Sets the encoding submode.
- Parameters:
mode
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public void setQuality(int quality)
Sets the Quality
- Specified by:
- setQuality in interface Encoder
- Parameters:
quality
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public void setSamplingRate(int rate)
Sets the sampling rate.
- Specified by:
- setSamplingRate in interface Encoder
- Parameters:
rate
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public void setVad(boolean vad)
Sets whether or not to use Voice Activity Detection encoding.
- Parameters:
vad
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public void setVbr(boolean vbr)
Sets whether or not to use Variable Bit Rate encoding.
- Parameters:
vbr
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public void setVbrQuality(float quality)
Sets the Varible Bit Rate Quality.
- Specified by:
- setVbrQuality in interface Encoder
- Parameters:
quality
-