improve prediction formula for HO-DirAC case (723654a6) · Commits · IVAS Codec Public Collaboration / IVAS Codec

lib_com/ivas_spar_com.c

+47 −42

Original line number	Diff line number	Diff line
		@@ -1915,9 +1915,22 @@ void ivas_get_spar_md_from_dirac(
		{
		w1 = ratio[band] * ratio[band];
		w2 = ( 1.0f - ratio[band] ) * ( 1.0f - ratio[band] );

		for ( i = 0; i < num_ch; i++ )
		{
		for ( j = 0; j < num_ch; j++ )
		{
		cov_real_dirac[i][j][band] = en_ratio_fac * ( w1 * response_avg[i] * response_avg[j] + w2 * response_avg2[i] * response_avg2[j] );
		if ( i == j )
		{
		cov_real_dirac[i][j][band] += diffuseness[band];
		}
		}
		}
		}
		else
		#endif

		{
		for ( i = 0; i < num_ch; i++ )
		{
		for ( j = 0; j < num_ch; j++ )
		@@ -1975,14 +1988,6 @@ void ivas_get_spar_md_from_dirac(
		}
		else
		{
		#ifdef HODIRAC_PRED
		if ( hodirac )
		{
		cov_real_dirac[i][j][band] = en_ratio_fac * ( w1 * response_avg[i] * response_avg[j] + w2 * response_avg2[i] * response_avg2[j] );
		}
		else
		#endif
		{
		cov_real_dirac[i][j][band] = en_ratio_fac * response_avg[i] * response_avg[j];
		}
		}