net.java.sip.communicator.impl.media.codec.audio.g729
Class Decoder

java.lang.Object
  net.java.sip.communicator.impl.media.codec.audio.g729.Ld8k
      net.java.sip.communicator.impl.media.codec.audio.g729.Decoder

 class Decoder
extends Ld8k

Main program of the G.729 8.0 kbit/s decoder. Usage : decoder bitstream_file synth_file.

Author:

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

Field Summary

Fields inherited from class net.java.sip.communicator.impl.media.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

Decoder()
Initialization of decoder

Method Summary

static void	main(String[] args) Main decoder routine Usage :Decoder bitstream_file outputspeech_file Format for bitstream_file: One (2-byte) synchronization word One (2-byte) size word, 80 words (2-byte) containing 80 bits.
(package private) void	process(short[] serial, short[] sp16) Process SERIAL_SIZE short of speech.

Methods inherited from class java.lang.Object

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

Constructor Detail

Decoder

Decoder()

Initialization of decoder

Method Detail

main

public static void main(String[] args)
                 throws IOException

Main decoder routine Usage :Decoder bitstream_file outputspeech_file Format for bitstream_file: One (2-byte) synchronization word One (2-byte) size word, 80 words (2-byte) containing 80 bits. Format for outputspeech_file: Synthesis is written to a binary file of 16 bits data.

Parameters:

args - bitstream_file outputspeech_file

Throws:

IOException

process

void process(short[] serial,
             short[] sp16)

Process SERIAL_SIZE short of speech.

Parameters:

serial - input : serial array encoded in bits_ld8k

sp16 - output : speech short array