Commit b7437cd5 authored by Sandesh Venkatesh's avatar Sandesh Venkatesh
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Fix for 3GPP issue 1348: Increased noise level in BASOP decoder for... 

Fix for 3GPP issue 1348: Increased noise level in BASOP decoder for band-limited input from float encoder

Link #1348
parent a43b5c15

lib_dec/dec_tcx_fx.c

+2 −2
Original line number Diff line number Diff line
@@ -2636,10 +2636,10 @@ void IMDCT_ivas_fx( 
    {

        Word32 fac;

        // fac = shl_sat( mult_r( extract_h( L_shr_sat( hTcxDec->conceal_eof_gain32, sub( 1, hTcxDec->conceal_eof_gain_e ) ) ), st->last_concealed_gain_syn_deemph ), 1 );

        fac = Mpy_32_16_1( hTcxDec->conceal_eof_gain32, st->last_concealed_gain_syn_deemph ); // q = 31 - hTcxDec->conceal_eof_gain_e

        fac = Mpy_32_16_1( hTcxDec->conceal_eof_gain32, st->last_concealed_gain_syn_deemph ); // q = 31 - hTcxDec->conceal_eof_gain_e - last_concealed_gain_syn_deemph_e

        FOR( Word16 ind = 0; ind < overlap; ind++ )

        {

            old_syn_overl_fx[ind] = extract_l( L_shl_sat( Mpy_32_32( old_syn_overl_fx[ind], fac ), hTcxDec->conceal_eof_gain_e ) ); // Q(-2)

            old_syn_overl_fx[ind] = extract_h( L_shl_sat( Mpy_32_16_1( fac, old_syn_overl_fx[ind] ), add( hTcxDec->conceal_eof_gain_e, st->last_concealed_gain_syn_deemph_e ) ) ); // Q(-2)

            move16();

        }

    }

lib_dec/ivas_mdct_core_dec_fx.c

+3 −1
Original line number Diff line number Diff line
@@ -1623,6 +1623,8 @@ void ivas_mdct_core_tns_ns_fx( 
            }

            q_2 = q_x;

            move16();

            Word16 length2 = length;

            move16();

            sns_shape_spectrum_fx( x_fx[ch][k], &q_x, st->hTcxCfg->psychParamsCurrent, sns_int_scf_fx, q_sns_int_scf, st->hTcxCfg->psychParamsCurrent->nBins, &length );

            IF( LT_16( q_2, add( q_x, 1 ) ) ) /*scaling to q_2*/

            {
@@ -1632,7 +1634,7 @@ void ivas_mdct_core_tns_ns_fx( 
            }

            ELSE /*scaling to q_x+1*/

            {

                Scale_sig32( &x_fx[ch][k][0] + length, sub( L_spec[ch], length ), sub( add( q_x, 1 ), q_2 ) );

                Scale_sig32( &x_fx[ch][k][0] + length, sub( length2, length ), sub( add( q_x, 1 ), q_2 ) );

                q_x = add( q_x, 1 );

            }

            x_e[ch][k] = sub( 31, q_x );