org.xiph.speex
Class NbDecoder
- Codebook, Decoder
Narrowband Speex Decoder
- Jim Lawrence, helloNetwork.com
- Marc Gimpel, Wimba S.A. (mgimpel@horizonwimba.com)
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 |
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 |
int | decode(Bits bits, float[] out) - Decode the given input bits.
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int | decodeLost(float[] out) - Decode when packets are lost.
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void | decodeStereo(float[] data, int frameSize) - Decode the given bits to stereo.
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boolean | getPerceptualEnhancement() - Returns whether perceptual enhancement is enabled or disabled.
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void | init(int frameSize, int subframeSize, int lpcSize, int bufSize) - Initialise
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void | setPerceptualEnhancement(boolean enhanced) - Enables or disables perceptual enhancement.
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count_lost
private int count_lost
enhanced
protected boolean enhanced
innov2
private float[] innov2
last_ol_gain
private float last_ol_gain
Tail of the buffer
last_pitch
private int last_pitch
last_pitch_gain
private float last_pitch_gain
Pitch of last correctly decoded frame
pitch_gain_buf
private float[] pitch_gain_buf
Pitch gain of last correctly decoded frame
pitch_gain_buf_idx
private int pitch_gain_buf_idx
Pitch gain of last decoded frames
random
protected Random random
NbDecoder
public NbDecoder()
Constructor
decode
public int decode(Bits bits,
float[] out)
throws StreamCorruptedException
Decode the given input bits.
- decode in interface Decoder
bits
- - Speex bits buffer.out
- - the decoded mono audio frame.
- 1 if a terminator was found, 0 if not.
decodeLost
public int decodeLost(float[] out)
Decode when packets are lost.
out
- - the generated mono audio frame.
decodeStereo
public void decodeStereo(float[] data,
int frameSize)
Decode the given bits to stereo.
- decodeStereo in interface Decoder
data
- - float array of size 2*frameSize, that contains the mono
audio samples in the first half. When the function has completed, the
array will contain the interlaced stereo audio samples.frameSize
- - the size of a frame of mono audio samples.
getPerceptualEnhancement
public boolean getPerceptualEnhancement()
Returns whether perceptual enhancement is enabled or disabled.
- getPerceptualEnhancement in interface Decoder
- whether perceptual enhancement is enabled or disabled.
init
public void init(int frameSize,
int subframeSize,
int lpcSize,
int bufSize)
Initialise
- init in interface NbCodec
frameSize
- subframeSize
- lpcSize
- bufSize
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setPerceptualEnhancement
public void setPerceptualEnhancement(boolean enhanced)
Enables or disables perceptual enhancement.
- setPerceptualEnhancement in interface Decoder
Copyright © 1999-2004 Wimba S.A. All Rights Reserved.