Ub*1.0/(1<<QSTEP_MANTISSA_BITS))/(1<<(-nShift));
	
	return fBStep;




	return fBStep;

}

void CQuantizerStd::CalTileL2Norm(CTileBlkWTData *pTileBlkWTData)
{
	const double *lpSysWFilter=0,*hpSysWFilter=0;
    int nLenHalfSysWFilter;

	WFilter eWFilter=pTileBlkWTData->GetWFilter();
	
	switch (eWFilter)
	{
	case INT53:
		lpSysWFilter=lpSysWFilter_INT53;
		hpSysWFilter=hpSysWFilter_INT53;
		nLenHalfSysWFilter=nLenINT53HalfSysWFilter;
		break;
	case FLOAT97:
        lpSysWFilter=lpSysWFilter_FLOAT97;
		hpSysWFilter=hpSysWFilter_FLOAT97;
		nLenHalfSysWFilter=nLenFLOAT97HalfSysWFilter;
		break;
	default:
		{
			printf("WFilter type unknown!\n");
			exit(0);
		}

	}

	double *pfHp=new double[nLenHalfSysWFilter+1];
	double *pfLp=new double[nLenHalfSysWFilter+1];
	double *pfHpCov=0,*pfLpCov=0;
	int i;
	for (i=0;i<nLenHalfSysWFilter+1;i++)
	{
		*(pfHp+i)=*(lpSysWFilter+i);
		*(pfLp+i)=*(hp