Commit f6fb2f2c authored by Jan Kiene's avatar Jan Kiene
Browse files

add fix for MDCT-Stereo PLC fadeout with TD concealment

parent b6635fa9

lib_com/ivas_cnst.h

+3 −0
Original line number Diff line number Diff line
@@ -885,6 +885,9 @@ enum fea_names 
#define MDCT_ST_PLC_FADEOUT_MIN_NOISE_NRG       0.001f

#define MDCT_ST_PLC_FADEOUT_MAX_CONC_FRAME      2 * FRAMES_PER_SEC

#define MDCT_ST_PLC_FADEOUT_TO_ZERO_LEN         20

#ifdef FIX_MDCT_ST_PLC_FADEOUT_DELAY

#define MDCT_ST_PLC_FADEOUT_DELAY_4_LSP_FADE    3

#endif



typedef enum {

    EQUAL_CORES,

lib_com/options.h

+1 −0
Original line number Diff line number Diff line
@@ -213,6 +213,7 @@ 
#define FIX_DTX_428                                     /* FhG: fix for issue 428, crash with DTX and bitrate switching */



#define FIX_STEREO_474                                  /* FhG fix for issue 574, crash with SBA to stereo output at 512 kbps */

#define FIX_MDCT_ST_PLC_FADEOUT_DELAY



/* ################## End DEVELOPMENT switches ######################### */

/* clang-format on */

lib_dec/er_dec_tcx.c

+20 −1
Original line number Diff line number Diff line
@@ -551,20 +551,39 @@ void con_tcx( 
    mvr2r( synth - M, buf, M );

    mvr2r( buf, mem_syn, M );





    if ( A_cng != NULL )

    {

#ifdef FIX_MDCT_ST_PLC_FADEOUT_DELAY

        float alpha_delayed;



        alpha_delayed = 1.0f;

        if (st->nbLostCmpt > MDCT_ST_PLC_FADEOUT_DELAY_4_LSP_FADE)

        {

            alpha_delayed = Damping_fact( st->core_ext_mode, st->nbLostCmpt - MDCT_ST_PLC_FADEOUT_DELAY_4_LSP_FADE, st->last_good, st->stab_fac, &( st->lp_gainp ), ACELP_CORE );

        }



        if ( st->plcBackgroundNoiseUpdated && alpha_delayed != 1.0f )

#else

        if ( st->plcBackgroundNoiseUpdated && alpha != 1.0f )

#endif

        {

            float lsp_local[M], lsp_fade[M], alpha_inv;



#ifdef FIX_MDCT_ST_PLC_FADEOUT_DELAY

            alpha_inv = 1.0f - alpha_delayed;

#else

            alpha_inv = 1.0f - alpha;

#endif



            a2lsp_stab( A_local, lsp_local, lsp_local );



            for ( i = 0; i < M; i++ )

            {

#ifdef FIX_MDCT_ST_PLC_FADEOUT_DELAY

                lsp_fade[i] = alpha_delayed * lsp_local[i] + alpha_inv * st->lspold_cng[i];

#else

                lsp_fade[i] = alpha * lsp_local[i] + alpha_inv * st->lspold_cng[i];

#endif

            }



            lsp2a_stab( lsp_fade, A_local, M );