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    發(fā)布日期: 2021-05-08
  • 語言: 其他
  • 標(biāo)簽: G.729??語音壓縮??C++??

資源簡介

G.729的實現(xiàn)代碼。 G.729是利用共扼結(jié)構(gòu)-代數(shù)激勵編碼線性預(yù)測(CS-ACELP)以 8 bit/s 進(jìn)行語音編碼

資源截圖

代碼片段和文件信息

/*************************************************************************/
/*???????????????????????????????????????????????????????????????????????*/
/*????????????????????????????LD-CELP??G.728?????????????????????????????*/
/*???????????????????????????????????????????????????????????????????????*/
/*????Low-Delay?Code?Excitation?Linear?Prediction?speech?compression.????*/
/*???????????????????????????????????????????????????????????????????????*/
/*?????????????????Copyright:?Analog?Devices?Inc.?1993?????????????????*/
/*???????????????????????????????????????????????????????????????????????*/
/*?????????????????????????Author:?Alex?Zatsman.?????????????????????????*/
/*???????????????????????????????????????????????????????????????????????*/
/*??This?program?was?written?mostly?for?testing??Analog?Devices‘?g21k?C??*/
/*??compiler?for?the??ADSP21000?architecture??family.?While?the?program??*/
/*??works??on??Sparc?and?ADSP21020?it??has??NOT??been??tested?with?the??*/
/*??official?test?data?from?CCITT/ITU.???????????????????????????????????*/
/*???????????????????????????????????????????????????????????????????????*/
/*??The?program??is???distributed?as??is??WITHOUT?ANY?WARRANTY?EITHER??*/
/*??EXPLICIT?OR?IMPLIED.?????????????????????????????????????????????????*/
/*???????????????????????????????????????????????????????????????????????*/
/*************************************************************************/

#include?“common.h“
#include?“fast.h“
#include?“parm.h“
#include?“data.h“
#include?“prototyp.h“

static?int?sf_levdur?(real[]?real?LPC_MEM?[]);
static?int?levdur?(real[]?real?LPC_MEM?[]?int);
static?void?hybwin(int?lpsize?int?framesize?int?nrsize
????real?old_input[]?real?new_input[]?real?output[]
????real?WIN_MEM?window[]?real?rec[]??real?decay);
static?void?bw_expand2(real?input[]
???????real?COEFF_MEM?z_out[]?real?COEFF_MEM?p_out[]
???????int?order?real?z_vec[]?real?p_vec[]);
static?void?bw_expand1(real?input[]?real?COEFF_MEM?p_out[]
int?order?real?p_vec[]);

/**********************************?Adapter?for?Perceptual?Weighting?Filter?*/

static?real?
????pwf_z_vec[LPCW+1] /*?Arrays?for?band?widening:?zeros?and*/
????pwf_p_vec[LPCW+1] /*?poles?*/
????pwf_old_input[LPCW+NFRSZ+NONRW]
????pwf_rec[LPCW+1]; /*?Recursive?Part?*/
????

void
pwf_adapter?(real?input[]
?????real?COEFF_MEM?z_out[]?/*?zero?coefficients?*/
?????real?COEFF_MEM?p_out[])?/*?pole?coefficients?*/
{
????static?real
acorr[LPCW+1] /*?autocorrelation?coefficients?*/
lpcoeff[LPCW+1];
????static?real?LPC_MEM
temp[LPCW+1];

????hybwin(LPCW /*?lpsize?*/
???NFRSZ /*?framesize?*/
???NONRW /*?nrsize?--?nonrecursive?size?*/
???pwf_old_input
???input
???acorr
???hw_percw
???pwf_rec
???0.5);
????if?(levdur(acorr?temp?LPCW))
RCOPY(temp?lpcoeff?LPCW+1);
????bw_expand2?(lpcoeff?z_out?p_out?LPCW
pwf_z_vec?pwf_p_vec);
}

?void
init_pwf_adapter?(real?COEFF_MEM?z_co[]?real?COEFF_MEM?p_co[])
{
????real?zv?=?1.0?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????6964??1993-07-21?05:00??G.729\G729(LD-CELP)\020_hdr.asm

?????文件???????2829??1993-08-12?00:50??G.729\G729(LD-CELP)\21kflags.h

?????文件??????10492??1993-08-14?04:32??G.729\G729(LD-CELP)\adapters.c

?????文件???????2969??1993-08-14?04:34??G.729\G729(LD-CELP)\cbindex.asm

?????文件???????1538??1993-08-13?03:37??G.729\G729(LD-CELP)\cbindex.h

?????文件???????5269??2002-08-07?11:45??G.729\G729(LD-CELP)\ccelp\ccelp.dsp

?????文件????????533??2002-08-07?11:42??G.729\G729(LD-CELP)\ccelp\ccelp.dsw

?????文件?????123904??2007-06-02?13:50??G.729\G729(LD-CELP)\ccelp\ccelp.ncb

?????文件??????69632??2007-06-02?13:50??G.729\G729(LD-CELP)\ccelp\ccelp.opt

?????文件???????6209??1993-08-14?04:33??G.729\G729(LD-CELP)\cmain.c

?????文件???????6480??1993-08-14?04:33??G.729\G729(LD-CELP)\codebook.c

?????文件???????3843??1993-08-13?23:06??G.729\G729(LD-CELP)\common.h

?????文件??????14791??1993-08-14?04:33??G.729\G729(LD-CELP)\data.c

?????文件???????1340??1993-08-13?05:05??G.729\G729(LD-CELP)\data.h

?????文件???????5444??1993-08-14?04:33??G.729\G729(LD-CELP)\dmain.c

?????文件????????791??1993-07-21?01:45??G.729\G729(LD-CELP)\ez.ach

?????文件???????4730??1993-08-14?04:33??G.729\G729(LD-CELP)\ezplay.c

?????文件???????2956??1993-07-23?20:07??G.729\G729(LD-CELP)\fast.h

?????文件???????6910??1993-08-14?04:33??G.729\G729(LD-CELP)\filters.c

?????文件???????6745??1993-08-14?04:34??G.729\G729(LD-CELP)\fio21k.asm

?????文件???????2053??1993-08-14?04:33??G.729\G729(LD-CELP)\global.c

?????文件???????4024??1993-08-14?04:34??G.729\G729(LD-CELP)\io-sparc.c

?????文件???????2370??1994-05-07?01:13??G.729\G729(LD-CELP)\Makefile

?????文件???????1243??1993-07-17?07:45??G.729\G729(LD-CELP)\parm.h

?????文件??????12087??1993-08-14?04:34??G.729\G729(LD-CELP)\postfil.c

?????文件???????1677??1993-08-13?04:38??G.729\G729(LD-CELP)\prototyp.h

?????文件????????108??1993-08-14?03:09??G.729\G729(LD-CELP)\qsize.h

?????文件???????3359??1994-05-07?01:12??G.729\G729(LD-CELP)\README

?????文件???????2649??2004-11-24?17:40??G.729\G729A_Eval\EasyG729A.h

?????文件???????4514??2004-11-24?17:47??G.729\G729A_Eval\EasyG729A_decoder.c

............此處省略26個文件信息

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