dsp_sub.h
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上传日期：2021-12-16
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- /*
- 2.4 kbps MELP Proposed Federal Standard speech coder
- version 1.2
- Copyright (c) 1996, Texas Instruments, Inc.
- Texas Instruments has intellectual property rights on the MELP
- algorithm. The Texas Instruments contact for licensing issues for
- commercial and non-government use is William Gordon, Director,
- Government Contracts, Texas Instruments Incorporated, Semiconductor
- Group (phone 972 480 7442).
- */
- /*
- dsp_sub.h: include file
-
- */
- /* External function definitions */
- void autocorr(float input[], float r[], int order, int npts);
- void envelope(float input[], float prev_in, float output[], int npts);
- void fill(float output[], float fillval, int npts);
- void interp_array(float prev[],float curr[],float out[],float ifact,int size);
- float median(float input[], int npts);
- void pack_code(int code,unsigned int **p_ch_beg,int *p_ch_bit,int numbits,int size);
- float peakiness(float input[], int npts);
- void polflt(float input[], float coeff[], float output[], int order,int npts);
- void quant_u(float *p_data, int *p_index, float qmin, float qmax, int nlev);
- void quant_u_dec(int index, float *p_data,float qmin, float qmax, int nlev);
- void rand_num(float output[],float amplitude, int npts);
- int unpack_code(unsigned int **p_ch_beg,int *p_ch_bit,int *p_code,int numbits,int wsize,unsigned int erase_mask);
- void window(float input[], float win_cof[], float output[], int npts);
- void zerflt(float input[], float coeff[], float output[], int order,int npts);
- int readbl(float input[], FILE *fp_in, int size);
- void writebl(float output[], FILE *fp_out, int size);
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