net.java.sip.communicator.impl.neomedia.codec.audio.g729
Class DecLd8k

java.lang.Object
  net.java.sip.communicator.impl.neomedia.codec.audio.g729.Ld8k
      net.java.sip.communicator.impl.neomedia.codec.audio.g729.DecLd8k

 class DecLd8k
extends Ld8k

Functions init_decod_ld8k and decod_ld8k.

 Decoder constant parameters (defined in "ld8k.h")
   L_FRAME     : Frame size.
   L_SUBFR     : Sub-frame size.
   M           : LPC order.
   MP1         : LPC order+1
   PIT_MIN     : Minimum pitch lag.
   PIT_MAX     : Maximum pitch lag.
   L_INTERPOL  : Length of filter for interpolation
   PRM_SIZE    : Size of vector containing analysis parameters
 

Author:

Lubomir Marinov (translation of ITU-T C source code to Java)

Field Summary

Fields inherited from class net.java.sip.communicator.impl.neomedia.codec.audio.g729.Ld8k

AGC_FAC, AGC_FAC1, ALPHA, BETA, BIT_0, BIT_1, CONST12, DIM_RR, F_UP_PST, FIR_SIZE_ANA, FIR_SIZE_SYN, FLT_MAX_G729, FLT_MIN_G729, GAIN_PIT_MAX, GAMMA_G, GAMMA1_0, GAMMA1_1, GAMMA1_PST, GAMMA2_0_H, GAMMA2_0_L, GAMMA2_1, GAMMA2_PST, GAMMA3_MINUS, GAMMA3_PLUS, GAP1, GAP2, GAP3, GP0999, GPCLIP, GPCLIP2, GRID_POINTS, INV_COEF, INV_L_SUBFR, L_FRAME, L_INTER10, L_INTER4, L_INTERPOL, L_LIMIT, L_NEXT, L_SUBFR, L_SUBFRP1, L_TOTAL, L_WINDOW, LH_UP_L, LH_UP_S, LH2_L, LH2_L_P1, LH2_S, LONG_H_ST, M, M_LIMIT, MA_NP, MAX_TIME, MEAN_ENER, MEM_RES2, MIN_GPLT, MODE, MP1, MSIZE, NB_POS, NC, NC0, NC0_B, NC1, NC1_B, NCAN1, NCAN2, NCODE1, NCODE1_B, NCODE2, NCODE2_B, PI, PI04, PI92, PIT_MAX, PIT_MIN, PRM_SIZE, SERIAL_SIZE, SHARPMAX, SHARPMIN, SIZ_RES2, SIZ_TAB_HUP_L, SIZ_TAB_HUP_S, SIZ_Y_UP, SIZE_WORD, STEP, SYNC_WORD, THRESCRIT, THRESH_ERR, THRESH_H1, THRESH_H2, THRESH_L1, THRESH_L2, THRESHFCB, THRESHPIT, UP_SAMP

Constructor Summary

DecLd8k()

Method Summary

(package private) int	decod_ld8k(int[] parm, int voicing, float[] synth, int synth_offset, float[] A_t) Decoder
(package private) void	init_decod_ld8k() Initialization of variables for the decoder section.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DecLd8k

DecLd8k()

Method Detail

init_decod_ld8k

void init_decod_ld8k()

Initialization of variables for the decoder section.

decod_ld8k

int decod_ld8k(int[] parm,
               int voicing,
               float[] synth,
               int synth_offset,
               float[] A_t)

Decoder

Parameters:

parm - input : synthesis parameters (parm[0] = bfi)

voicing - input : voicing decision from previous frame

synth - output: synthesized speech

synth_offset - input : synthesized speech offset

A_t - output: two sets of A(z) coefficients length=2*MP1

Returns:

output: integer delay of first subframe