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[5]ºÂÈí²ã£¬Ðì½ð¸¦.»ùÓÚDSPоƬµÄMELPÉùÂëÆ÷µÄË㷨ʵÏÖ[J].΢¼ÆËã»úÐÅÏ¢£¬2006£»[6]ÈÎÀöÏ㣬ÂíÊç·Ò£¬Àî·½»Û.TMS220600ϵÁÐDSPµÄÔ­ÀíÓëÓ¦ÓÃ[M]£®±±¾©£ºµç×Ó¹¤Òµ³ö°æÉ磬2000£»[7]±±¾©ºÏÖÚ´ïµç×Ó¼¼ÊõÓÐÏÞ¹«Ë¾±àÖø.SEED-DTKϵÁÐʵÑéÊÖ²á.±±¾©ºÏÖÚ´ïµç×Ó¼¼ÊõÓÐÏÞ¹«Ë¾³ö°æ£¬2007¡£Ö лÔÚÕâ´Î¿Î³ÌÉè¼Æ¹ý³ÌÖУ¬ÎÒÒª¸Ðлÿһ¸ö°ïÖú¹ýÎÒµÄÈË¡£±¾ÂÛÎÄÊÇÔÚÁõÀÏʦµÄϤÐÄÖ¸µ¼ÏÂÍê³ÉµÄ£¬ÁõÀÏʦ¶ÔÎÒµÄÂÛÎÄÌá³öÁ˺ܶ౦¹óµÄÒâ¼û£¬°ïÖúÎÒ¿ªÍØÑо¿Ë¼Â·£¬¾«Ðĵ㲦¡¢ÈȳÀ¹ÄÀø¡£Í¬Ê±£¬ÁõÀÏʦԨ²©µÄѧʶ¡¢ÑϽ÷µÄÖÎѧ̬¶ÈÒ²ÁîÎÒÊ®·Ö¾´Å壬ÊÇÎÒÒÔºóѧϰºÍ¹¤×÷µÄ°ñÑù¡£ÔÚÕû¸öÉè¼Æ¹ý³ÌÖÐÎÒ¶®µÃÁËÐí¶à¶«Î÷£¬Ò²ÅàÑøÁËÎÒ¶ÀÁ¢¹¤×÷µÄÄÜÁ¦£¬Ê÷Á¢Á˶Ô×Ô¼º¹¤×÷ÄÜÁ¦µÄÐÅÐÄ£¬ÏàÐÅ»á¶Ô½ñºóµÄѧϰ¹¤×÷Éú»îÓзdz£ÖØÒªµÄÓ°Ï죬ͬʱ£¬Ò²ÈÃÎÒÖªµÀÁËÄÇЩ»ù´¡ÖªÊ¶µÄÖØÒªÐÔ¡£±¾ÂÛÎĵÄ˳ÀûÍê³É£¬Àë²»¿ªÎÒÃÇÀÏʦϤÐĽ̵¼¡¢Í¬Ñ§ºÍÅóÓѵĹØÐĺͰïÖú¡£×ÜÖ®£¬¸Ðлÿһλ¹ØÐĹýÎÒ£¬°®»¤¹ýÎÒµÄÈË¡£×îºó£¬ÔٴθÐл¸÷λÀÏʦ¸÷λͬѧµÄ°ïÖúºÍÖ§³Ö£¬ÖÔÐĵØллÄãÃÇ£¡¸½ ¼Դ´úÂëÈçÏ£º#include void iirbcf(ifilt,band,ns,n,f1,f2,f3,f4,db,b,a) double b[],a[],f1,f2,f3,f4,db;/* TMS320VC5416³õʼ»¯*/SWWSR=0x7fff;/³ÌÐò¡¢Êý¾Ý¡¢I/O¿Õ¼ä SWCR=0x0001;/µÈ´ýÖÜÆÚΪ7¡Á2=14 BSCR=0x8006;/°´32KW·ÖÇø£¬HD[7:0]£¬D[15:0]Hold CLKMD=PLL_DIV_INIT; Waitloop(0x0400); CLKMD=PLL_LOCK_INIT_X(5); Waitloop(0x0400); PMST=0x0168;/ÖжÏÏòÁ¿±í¶¨Î»ÔÚ0X100£¬MP/MC=1 OVLY=1 DROM=1;/* TLV320AIC23³õʼ»¯*/Unsigned int codec_buf[9]={OX1e00£¬OXOc00£¬OxO81a OxOaO4£¬OxOe01£¬0x1020£¬0x1021£¬0x0117£¬OxO5f9}; Port_sub_address=(unsigned int*)MCBSP_SPSA_ADDR(1); Port_sub_index_reg=(unsigned int*)MCBSP_SPAD_ADDR(1); *Port_sub_address=MCBSP_SPCR2_SUBADDR; For(i=O;i<9;i++){ While(!(*Port_sub_index_reg&(MASK_BIT(XRDY)))); Set_codec_cs_low(); MCBSP1_DXR1=codec_buf[i]; While(!(*Port_sub_index_reg&(MASK_BIT(XRDY)))); Set_codec_cs_high();}int ifilt,band,ns,n; {int k; double omega,lamda,epslon,f1,fh; double d[5],c[5]; void chebyi(),chebyii(),bwtf(); double coshl(),warp(),bpsub(),omin(); void fblt(); if((band==1)||(band==4)) fl=f1; if((band==2)||(band==3)) fl=f2; if(band<=3) fh=f3; if(band==4) fh=f4; if(ifilt<3) { switch(band) { case1: case2: { omega=warp(f2)/warp(f1); break; } case3: { omega=omin(bpsub(warp(f1),fh,fl),bpsub(warp(f4),fh,fl)); break; } case4: {omega=omin(1.0/bpsub(warp(f2),fh,fl),1.0/bpsub(warp(f3),fh,fl));} } lamda=pow(10.0,(db/20.0)); epslon=lamda/cosh(2*ns*coshl(omega)); } for(k=0;k{ switch(ifilt) { case1: { chebyi(2*ns,k,4,epslon,d,c); break; } case2: { chebyii(2*ns,k,4,omega,lamda,d,c); break; } case3: { bwtf(2*ns,k,4,d,c); break; } } fblt(d,c,n,band,fl,fh,&b[k*(n+1)+0],&a[(n+1)+0]); } } static double coshl(x) double x; { double z; z=log(x+sqrt(x*x-1.0)); return(z); } static double warp(f) double f; { double pi,z; pi=4.0*atan(1.0); z=tan(pi*f); return(z); } static double bpsub(om,fh,fl) double om,fh,fl; { double z; z=(om*om-warp(fh)*warp(fl))/((warp(fh)-warp(fl))*om); return(z); } static double omin(om1,om2) double om1,om2; { double z,z1,z2; z1=fabs(om1); z2=fabs(om2); z=(z1return(z); } static void bwtf(ln,k,n,d,c) int ln,k,n; double d[],c[]; { int i; double pi,tmp; pi=4.0*atan(1.0); d[0]=1.0; c[0]=1.0; for(i=1;i<=n;i++) { d[i]=0.0; c[i]=0.0; } tmp=(k+1)-(ln+1.0)/2.0; if(tmp==0,0) {c[1]=1.0;} else { c[1]=-2.0*cos((2*(k+1)+ln-1)*pi/(2*ln)); c[2]=1.0; } } static void chebyi(ln,k,n,ep,d,c) double d[],c[],ep; int ln,k,n; {int i; double pi,gam,omega,sigma; pi=4.0*atan(1.0); gam=pow(((1.0+sqrt(1.0+ep*ep))/ep),1.0/ln); sigma=0.5*(1.0/gam-gam)*sin((2*(k+1)-1)*pi/(2*ln)); omega=0.5*(1.0/gam+gam)*cos((2*(k+1)-1)*pi/(2*ln)); for(i=0;i<=n;i++) {d[i]=0.0; c[i]=0.0; } if(((ln%2)==1)&&((k+1)==(ln+1)/2)) { d[0]=-sigma; c[0]=d[0]; c[1]=1.0; } else { c[0]=sigma*sigma+omega*omega; c[1]=-2.0*sigma; c[2]=1.0; d[0]=c[0]; if(((ln%2)==0)&&(k==0)) d[0]=d[0]/sqrt(1.0+ep*ep); } } static void chebyii(ln,k,n,ws,att,d,c) double d[],c[],ws,att; int ln,k,n; { int i; double pi,gam,alpha,beta,sigma,omega,scln,scld; pi=4.0*atan(1.0); gam=pow((att+sqrt(att*att-1.0)),1.0/ln); alpha=0.5*(1.0/gam-gam)*sin((2*(k+1)-1)*pi/(2*ln)); beta=0.5*(1.0/gam+gam)*cos((2*(k+1)-1)*pi/(2*ln)); sigma=ws*alpha/(alpha*alpha+beta*beta); omega=-1.0*ws*beta/(alpha*alpha+beta*beta); for(i=0;i<=n;i++) { d[i]=0.0; c[i]=0.0; } if(((ln%2)==1)&&((k+1)==(ln+1)/2)) { d[0]=-1.0*sigma; c[0]=d[0]; c[1]=1.0; } else { scln=sigma*sigma+omega*omega;scld=pow((ws/cos((2*(k+1)-1)*pi/(2*ln))),2); d[0]=scln*scld; d[2]=scln; c[0]=d[0]; c[1]=-2.0*sigma*scld; c[2]=scld; } } #inlcude static void fblt(d,c,n,band,fln,fhn,b,a) int n,band; double fln,fhn,d[],d[],b[],a[]; { int i,k,m,n1,n2,ls; double pi,w,w0,w1,w2,tmp ,tmpd,tmpc,*work; double combin(); void bilinear(); pi=4.0*atan(1.0); w1=tan(pi*fln); for(i=n;i>=0;i--) { if((c[i]!=0.0)||(d[i]!=0.0)) break; } m=i; switch(band) { case1: case2: { n2=m; n1=n2+1; if(band==2) { for(i=0;i<=m/2;i++) { tmp=d[i]; d[i]=d[m-i]; d[m-i]=tmp; tmp=c[i]; c[i]c[m-i]; c[m-i]=tmp; } } for(i=0;i<=m;i++) { d[i]=d[i]/pow(w1,i); c[i]=c[i]/pow(w1,i); } break; } case3: case4: { n2=2*m; n1=n2+1; work=malloc(n1*n1*sizeof(double)); w2=tan(pi*fhn); w=w2-w1; w0=w1*w2; if(band==4) { for(i=0;i<=m/2;i++) { tmp=d[i]; d[i]=d[m-i]; d[m-i]=tmp; tmp=c[i]; c[i]=c[m-i]; c[m-i]=tmp; } } for(i=0;i<=n2;i++) { work[0*n1+i]=0.0; work[1*n1+i]=0.0; } for(i=0;i<=m;i++) { tmpd=d[i]*pow(w,(m-i)); tmpc=c[i]*pow(w,(m-i)); for(k=0;k<=i;k++) { ls=m+i-2*k; tmp=combin(i,i)/(combin(k,k)*combin(i-k,i-k)); work[0*n1+ls]+=tmpd*pow(w0,k)*tmp; work[1*n1+ls]+=tmpc*pow(w0,k)*tmp; } } for(i=0;i<=n2;i++) { d[i]=work[0*n1+i]; c[i]=work[1*n1+i]; } free(work); } } bilinear(d,c,b,a,n); } static double combin(i1,i2) int i1,i2; { int i; double s; s=1.0; if(i2==0) return(s); for(i=i1;i>(i1-i2);i--) {s*=i;} return(s); } static void bilinear(d,c,b,a,n) int n; double d[],c[],b[],a[]; { int i,j,n1; double sum,atmp,scale,*temp; n1=n+1; temp=malloc(n1*n1*sizeof(double)); for(j=0;j<=n;j++) {temp[j*n1+0]=1.0;} sum=1.0; for(i=1;i<=n;i++) { sum=sum*(double)(n-i+1)/(double)i; temp[0*n1+i]=sum; } for(i=1;i<=n;i++) for(j=1;j<=n;j++) { temp[j*n1+i]=temp[(j-1)*n1+i]-temp[j*n1+i-1]-temp[(j-1)*n1+i-1]; } for(i=n;i>=0;i--) { b[i]=0.0; atmp=0.0; for(j=0;j<=n;j++) { b[i]=b[i]+temp[j*n1+i]*d[j]; atmp=atmp+temp[j*n1+i]*c[j]; } scale=atmp; if(i!=0) a[i]=atmp; } for(i=0;i<=n;i++) { b[i]=b[i]/scale; a[i]=a[i]/scale; } a[0]=1.0; free(temp); } "
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