aacenc_tns.c File Reference

AAC encoder temporal noise shaping. More...

#include "libavutil/libm.h"
#include "aacenc.h"
#include "aacenc_tns.h"
#include "aactab.h"
#include "aacenc_utils.h"
#include "aacenc_quantization.h"

Macros
#define	TNS_Q_BITS   4
#define	TNS_Q_BITS_IS8   4
#define	TNS_ENABLE_COEF_COMPRESSION
#define	TNS_GAIN_THRESHOLD_LOW   1.4f
#define	TNS_GAIN_THRESHOLD_HIGH   1.16f*TNS_GAIN_THRESHOLD_LOW

Functions
void	ff_aac_encode_tns_info (AACEncContext *s, SingleChannelElement *sce)
	Encode TNS data. More...
void	ff_aac_apply_tns (AACEncContext *s, SingleChannelElement *sce)
void	ff_aac_search_for_tns (AACEncContext *s, SingleChannelElement *sce)

Detailed Description

AAC encoder temporal noise shaping.

Author

Rostislav Pehlivanov ( atomnuker gmail com )

Function Documentation

ff_aac_encode_tns_info()

void ff_aac_encode_tns_info	(	AACEncContext *	s,
		SingleChannelElement *	sce
	)

Encode TNS data.

Coefficient compression is simply not lossless as it should be on any decoder tested and as such is not active.