fix for BWD and transients under BWD_COUNT_FIX (6f3c26e1) · Commits · IVAS Codec Public Collaboration / IVAS Codec

lib_com/options.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -157,7 +157,7 @@
		#endif
		//#define DISABLE_BWD_MCT /* FhG: Disable bandwidth detection for MCT*/
		#define FIX_MDCT_STEREO_BWD_TCX10 /* FhG: enables bw detection also for TCX10 frames */

		#define BWD_COUNT_FIX /* FhG/Dolby: fix for issue of reacting to sudden transiensts in SBA/MCT modes */

		/* ################## End DEVELOPMENT switches ######################### */
		/* clang-format on */

lib_com/prot.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -3828,8 +3828,13 @@ void bw_detect(
		const float signal_in[], /* i : input signal */
		float spectrum, / i : MDCT spectrum */
		const float enerBuffer / i : energy buffer */
		#ifdef BWD_COUNT_FIX
		,
		const int16_t mct_on /* i : flag MCT mode */
		#endif
		);


		void set_bw(
		const int16_t element_mode, /* i : element mode */
		const int32_t element_brate, /* i : element bitrate */

lib_enc/amr_wb_enc.c

100644 → 100755

+6 −1

Original line number	Diff line number	Diff line
		@@ -342,7 +342,12 @@ void amr_wb_enc(
		* WB, SWB and FB bandwidth detector
		----------------------------------------------------------------/

		bw_detect( st, st->input, NULL, NULL );
		bw_detect( st, st->input, NULL, NULL
		#ifdef BWD_COUNT_FIX
		,
		0
		#endif
		);

		/* in AMR_WB IO, limit the maximum band-width to WB */
		if ( st->bwidth > WB )

lib_enc/bw_detect.c

100644 → 100755

+80 −19

Original line number	Diff line number	Diff line
		@@ -57,6 +57,9 @@

		#define BWD_COUNT_MAX 100
		#define BWD_COUNT_WIDER_BW 10
		#ifdef BWD_COUNT_FIX
		#define BWD_COUNT_WIDER_BW_MDCT 0
		#endif

		#define CLDFB_ENER_OFFSET 1.6f

		@@ -71,6 +74,10 @@ void bw_detect(
		const float signal_in[], /* i : input signal */
		float spectrum, / i : MDCT spectrum */
		const float enerBuffer / i : energy buffer */
		#ifdef BWD_COUNT_FIX
		,
		const int16_t mct_on /* i : flag MCT mode */
		#endif
		)
		{
		int16_t i, j, k, bw_max, bin_width, n_bins;
		@@ -396,6 +403,57 @@ void bw_detect(
		---------------------------------------------------------------------/

		/* switching to a higher BW */
		#ifdef BWD_COUNT_FIX
		if ( st->element_mode == IVAS_CPE_MDCT && ( st->element_brate > IVAS_64k \|\| mct_on ) )
		{
		if ( st->last_input_bwidth == NB )
		{
		if ( st->count_WB > BWD_COUNT_WIDER_BW_MDCT )
		{
		st->input_bwidth = WB;
		st->count_WB = BWD_COUNT_MAX;

		if ( st->count_SWB > BWD_COUNT_WIDER_BW_MDCT )
		{
		st->input_bwidth = SWB;
		st->count_SWB = BWD_COUNT_MAX;

		if ( st->count_FB > BWD_COUNT_WIDER_BW_MDCT )
		{
		st->input_bwidth = FB;
		st->count_FB = BWD_COUNT_MAX;
		}
		}
		}
		}

		if ( st->last_input_bwidth == WB && st->input_Fs > 16000 )
		{
		if ( st->count_SWB > BWD_COUNT_WIDER_BW_MDCT )
		{
		st->input_bwidth = SWB;
		st->count_SWB = BWD_COUNT_MAX;

		if ( st->count_FB > BWD_COUNT_WIDER_BW_MDCT )
		{
		st->input_bwidth = FB;
		st->count_FB = BWD_COUNT_MAX;
		}
		}
		}

		if ( st->last_input_bwidth == SWB && st->input_Fs > 32000 )
		{
		if ( st->count_FB > BWD_COUNT_WIDER_BW_MDCT )
		{
		st->input_bwidth = FB;
		st->count_FB = BWD_COUNT_MAX;
		}
		}
		}
		else
		{
		#endif
		if ( st->last_input_bwidth == NB )
		{
		if ( st->count_WB > BWD_COUNT_WIDER_BW )
		@@ -440,6 +498,9 @@ void bw_detect(
		st->count_FB = BWD_COUNT_MAX;
		}
		}
		#ifdef BWD_COUNT_FIX
		}
		#endif

		/* switching to a lower BW */
		if ( st->last_input_bwidth == FB )

lib_enc/ivas_core_pre_proc_front.c

100644 → 100755

+6 −1

Original line number	Diff line number	Diff line
		@@ -486,7 +486,12 @@ ivas_error pre_proc_front_ivas(

		if ( st->idchan == 0 && element_mode != IVAS_CPE_MDCT )
		{
		bw_detect( st, st->input, NULL, enerBuffer );
		bw_detect( st, st->input, NULL, enerBuffer
		#ifdef BWD_COUNT_FIX
		,
		0
		#endif
		);
		}

		if ( element_mode != IVAS_CPE_MDCT ) /* in MDCT stereo, set_bw_stereo() is used instead */

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