From 6e5dbe7267fc5790ff48225623be2ed9abd575c9 Mon Sep 17 00:00:00 2001 From: Rostislav Pehlivanov Date: Tue, 8 Dec 2015 13:21:41 +0000 Subject: [PATCH] aacenc_tns: use 4 bits for short windows With only 7 coefficients per short window at most the extra precision makes a difference and seems to reduce crackling and stddev even further. Signed-off-by: Rostislav Pehlivanov --- libavcodec/aacenc_tns.c | 2 +- tests/fate/aac.mak | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/aacenc_tns.c b/libavcodec/aacenc_tns.c index 84f5d09693..9ac9ed912e 100644 --- a/libavcodec/aacenc_tns.c +++ b/libavcodec/aacenc_tns.c @@ -35,7 +35,7 @@ #define TNS_Q_BITS 4 /* Coefficient resolution in short windows */ -#define TNS_Q_BITS_IS8 3 +#define TNS_Q_BITS_IS8 4 /* We really need the bits we save here elsewhere */ #define TNS_ENABLE_COEF_COMPRESSION diff --git a/tests/fate/aac.mak b/tests/fate/aac.mak index d658751726..816fbf066f 100644 --- a/tests/fate/aac.mak +++ b/tests/fate/aac.mak @@ -182,7 +182,7 @@ fate-aac-tns-encode: CMD = enc_dec_pcm adts wav s16le $(TARGET_SAMPLES)/audio-re fate-aac-tns-encode: CMP = stddev fate-aac-tns-encode: REF = $(SAMPLES)/audio-reference/luckynight_2ch_44kHz_s16.wav fate-aac-tns-encode: CMP_SHIFT = -4096 -fate-aac-tns-encode: CMP_TARGET = 818 +fate-aac-tns-encode: CMP_TARGET = 817 fate-aac-tns-encode: FUZZ = 6 fate-aac-tns-encode: SIZE_TOLERANCE = 3560