This the GSM Enhanced Full Rate Codec C language source code, very good.

全速率语音\AGC.C
..........\AUTOCORR.C
..........\AZ_LSP.C
..........\BASICOP2.C
..........\BASIC_OP.H
..........\BITS2PRM.C
..........\C1035PF.C
..........\CNST.H
..........\CODEC.H
..........\CODER.C
..........\CODER.RSP
..........\COD_12K2.C
..........\CONVOLVE.C
..........\COPY.C
..........\COUNT.C
..........\COUNT.H
..........\D1035PF.C
..........\DECODER.C
..........\DECODER.RSP
..........\DEC_12K2.C
..........\DEC_LAG6.C
..........\DTX.C
..........\DTX.H
..........\D_GAINS.C
..........\D_HOMING.C
..........\D_HOMING.H
..........\D_PLSF_5.C
..........\ED_IFACE.C
..........\ENC_LAG6.C
..........\E_HOMING.C
..........\E_HOMING.H
..........\GAINS_TB.H
..........\GRID.TAB
..........\G_CODE.C
..........\G_PITCH.C
..........\INTER_6.C
..........\INT_LPC.C
..........\INV_SQRT.C
..........\INV_SQRT.TAB
..........\LAG_WIND.C
..........\LAG_WIND.TAB
..........\LEVINSON.C
..........\LOG2.C
..........\LOG2.TAB
..........\LSP_AZ.C
..........\LSP_LSF.C
..........\LSP_LSF.TAB
..........\MAKEFILE.GCC
..........\MAKEFILE.HP
..........\MAKEFILE.PC
..........\MAKEFILE.SUN
..........\N_PROC.C
..........\N_STACK.H
..........\OPER_32B.C
..........\OPER_32B.H
..........\PITCH_F6.C
..........\PITCH_OL.C
..........\POW2.C
..........\POW2.TAB
..........\PRED_LT6.C
..........\PREEMPH.C
..........\PRE_PROC.C
..........\PRM2BITS.C
..........\PSTFILT2.C
..........\Q_GAINS.C
..........\Q_PLSF_5.C
..........\Q_PLSF_5.TAB
..........\README.TXT
..........\REORDER.C
..........\RESIDU.C
..........\SET_ZERO.C
..........\SIG_PROC.H
..........\SPCH_DOS.COD
..........\SPCH_DOS.DEC
..........\SPCH_DOS.INP
..........\SPCH_DOS.OUT
..........\SPCH_UNX.COD
..........\SPCH_UNX.DEC
..........\SPCH_UNX.INP
..........\SPCH_UNX.OUT
..........\SYN_FILT.C
..........\TS_DOS.BAT
..........\TS_UNX.BAT
..........\TYPEDEF.H
..........\VAD.C
..........\VAD.H
..........\WEIGHT_A.C
..........\WINDOW2.TAB
全速率语音

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