AMR Post processing functions

Functions
static float	tilt_factor (float *lpc_n, float *lpc_d)
	Get the tilt factor of a formant filter from its transfer function.
static void	postfilter (AMRContext *p, float *lpc, float *buf_out)
	Perform adaptive post-filtering to enhance the quality of the speech.

---

Function Documentation

static void postfilter	(	AMRContext *	p,
		float *	lpc,
		float *	buf_out
	)		[static]

Perform adaptive post-filtering to enhance the quality of the speech.

See section 6.2.1.

Parameters:

p	pointer to the AMRContext
lpc	interpolated LP coefficients for this subframe
buf_out	output of the filter

Definition at line 906 of file amrnbdec.c.

Referenced by amrnb_decode_frame().

static float tilt_factor	(	float *	lpc_n,
		float *	lpc_d
	)		[static]

Get the tilt factor of a formant filter from its transfer function.

Parameters:

lpc_n	LP_FILTER_ORDER coefficients of the numerator
lpc_d	LP_FILTER_ORDER coefficients of the denominator

Definition at line 877 of file amrnbdec.c.

Referenced by postfilter().