Commit d021ed31 authored by Mohammadreza Naghibzadeh's avatar Mohammadreza Naghibzadeh
Browse files

Improve locally signal precision for LP analysis to preserve LSP accuracy in low-Q SCE path

parent 2ab72551

lib_enc/ivas_core_pre_proc_front_fx.c

+29 −8
Original line number Diff line number Diff line
@@ -356,11 +356,7 @@ void pre_proc_front_ivas_fx( 
    /* Take into account resampling memory for Q_min, and 1 bit headroom for resampling overshoot. */

    IF( NE_32( input_Fs, INT_FS_12k8 ) )

    {

#ifdef FIX_BASOP_2517_CLICK_IN_OMASA_LTV

        Q_min = s_min( Q_min, add( st->mem_q, norm_arr( st->mem_decim_fx_q_inp, 2 * L_FILT_MAX ) ) );

#else

        Q_min = sub( s_min( Q_min, add( st->mem_q, norm_arr( st->mem_decim_fx_q_inp, 2 * L_FILT_MAX ) ) ), Q1 );

#endif

    }

#endif

    /* Limit Q_min to avoid rescale larger than 15 against Q-1 */
@@ -495,11 +491,7 @@ void pre_proc_front_ivas_fx( 
    {

        new_inp_out_size = modify_Fs_fx( signal_in_fx, input_frame, input_Fs, new_inp_12k8_fx, INT_FS_12k8, st->mem_decim_fx_q_inp, ( st->max_bwidth == NB ), &Q_new_inp, &mem_decim_size ); /* st->q_inp */

#ifdef NONBE_FIX_ISSUE_2206

#ifdef FIX_BASOP_2517_CLICK_IN_OMASA_LTV

        Scale_sig( new_inp_12k8_fx, new_inp_out_size, negate( Q_new_inp ) ); /* scaling back to st->q_inp*/

#else

        scale_sig( new_inp_12k8_fx, new_inp_out_size, negate( Q_new_inp ) ); /* scaling back to st->q_inp*/

#endif

#else

        Scale_sig( new_inp_12k8_fx, new_inp_out_size, negate( Q_new_inp ) ); /* scaling back to st->q_inp*/

        st->mem_q = st->q_inp;
@@ -1161,7 +1153,36 @@ void pre_proc_front_ivas_fx( 
        move16();

    }



#ifdef FIX_BASOP_2517_CLICK_IN_OMASA_LTV

    Word16 inp_local[L_INP_12k8];

    Word16 offset = (Word16) ( inp_12k8_fx - old_inp_12k8_fx );

    Word16 norm_inp = norm_arr( old_inp_12k8_fx, L_INP_12k8 );

    Word16 Q_local;



    IF( GT_16( norm_inp, 0 ) )

    {

        Copy_Scale_sig( old_inp_12k8_fx, inp_local, L_INP_12k8, norm_inp );

        Q_local = add( *Q_new, norm_inp );

        analy_lp_fx( inp_local + offset, L_FRAME, L_look, ener_fx, A_fx, epsP_h, epsP_l, lsp_new_fx, lsp_mid_fx, st->lsp_old1_fx, alw_pitch_lag_12k8, alw_voicing_fx, INT_FS_12k8, element_mode, i, Q_local, Q_r );

        IF( ener_fx != NULL )

        {

            Word16 ener_shift = shl( norm_inp, 1 );

            IF( ener_shift > 0 )

            {

                ener_fx[0] = L_shr_sat( ener_fx[0], ener_shift );

                move32();

            }

        }

        Q_r[0] = sub( Q_r[0], shl( norm_inp, 1 ) );

        move16();

    }

    ELSE

    {

        analy_lp_fx( inp_12k8_fx, L_FRAME, L_look, ener_fx, A_fx, epsP_h, epsP_l, lsp_new_fx, lsp_mid_fx, st->lsp_old1_fx, alw_pitch_lag_12k8, alw_voicing_fx, INT_FS_12k8, element_mode, i, *Q_new, Q_r );

    }

#else

    analy_lp_fx( inp_12k8_fx, L_FRAME, L_look, ener_fx, A_fx, epsP_h, epsP_l, lsp_new_fx, lsp_mid_fx, st->lsp_old1_fx, alw_pitch_lag_12k8, alw_voicing_fx, INT_FS_12k8, element_mode, i, *Q_new, Q_r );

#endif



    FOR( Word16 idx = 0; idx < M + 1; idx++ )

    {