Commit 1ed28515 authored by Sandesh Venkatesh's avatar Sandesh Venkatesh
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Fix for 3GPP issue 1202: BASOP encoder ParamISM: strong timbre differences in the noise track 

Link #1202
parent 92cf2e11

lib_enc/ivas_ism_param_enc.c

+5 −5
Original line number Diff line number Diff line
@@ -307,7 +307,7 @@ void ivas_param_ism_stereo_dmx_fx( 
            /* Smoothing */

            cardioid_left[i] = add( mult( 24576 /* 0.75f in Q15 */, cardioid_left[i] ), mult( 8192 /* 0.25f in Q15 */, last_cardioid_left ) ); // Q14

            move16();

            grad = mult( sub( cardioid_left[i], last_cardioid_left ), shl( one_by_input_frame, 1 ) /* 2.0f / (float) input_frame*/ ); /* Q14 */ /* for the right cardioid, multiply with -1 */

            Word32 grad_32 = L_mult( sub( cardioid_left[i], last_cardioid_left ), shl( one_by_input_frame, 1 ) /* 2.0f / (float) input_frame*/ ); /* Q14+Q16 = Q30 */ /* for the right cardioid, multiply with -1 */

            /* Cardioids sum up to 1 */

            cardioid_right[i] = sub( ONE_IN_Q14 /* 1.0f in Q14 */, cardioid_left[i] ); /* corresponds to: alpha + ( 1 - alpha ) * cosf( tmp + tmp_1 ); */

            move16();
@@ -316,12 +316,12 @@ void ivas_param_ism_stereo_dmx_fx( 
            {

                tmp = data[i][j];

                move32();

                tmp = W_extract_l( W_shr( W_mult_32_16( tmp, add( last_cardioid_left, mult0( j, grad ) ) ), 15 ) ); /* Qx DMX Left */

                tmp = W_extract_l( W_shr( W_mult_32_32( tmp, L_add( last_cardioid_left, L_shr( Mpy_32_32( L_shl( j, 22 ), grad_32 ), 7 ) ) ), 15 ) ); /* Qx DMX Left */

                stereo_dmx[0][j] = L_add( stereo_dmx[0][j], tmp );                                                                                    /* Qx DMX Left */

                move32();

                tmp = data[i][j];

                move32();

                tmp = W_extract_l( W_shr( W_mult_32_16( tmp, add( last_cardioid_right, negate( mult0( j, grad ) ) ) ), 15 ) ); /* Qx DMX Right */

                tmp = W_extract_l( W_shr( W_mult_32_32( tmp, L_add( last_cardioid_right, L_shr( L_negate( Mpy_32_32( L_shl( j, 22 ), grad_32 ) ), 7 ) ) ), 15 ) ); /* Qx DMX Right */

                stereo_dmx[1][j] = L_add( stereo_dmx[1][j], tmp );                                                                                                 /* Qx DMX Right */

                move32();

                ene_data = W_add( ene_data, W_mult_32_32( data[i][j], data[i][j] ) ); /* 2 * Qx + 1 energy of all objects combined */