AMR wideband data and definitions. More...

#include <stdint.h>
#include <stddef.h>

Data Structures
struct	AMRWBSubFrame

struct	AMRWBFrame

Macros
#define	LP_ORDER 16
	linear predictive coding filter order

#define	LP_ORDER_16k 20
	lpc filter order at 16kHz

#define	HB_FIR_SIZE 30
	amount of past data needed by HB filters

#define	UPS_FIR_SIZE 12
	upsampling filter size

#define	UPS_MEM_SIZE (2 * UPS_FIR_SIZE)

#define	MIN_ISF_SPACING (128.0 / 32768.0)
	minimum isf gap

#define	PRED_FACTOR (1.0 / 3.0)

#define	MIN_ENERGY -14.0
	initial innovation energy (dB)

#define	ENERGY_MEAN 30.0
	mean innovation energy (dB) in all modes

#define	PREEMPH_FAC 0.68
	factor used to de-emphasize synthesis

#define	DTX_HIST_SIZE 8
	frames kept for comfort noise parameter averaging

#define	DTX_MAX_EMPTY_THRESH 50
	frames without SID update before muting

#define	DTX_ELAPSED_FRAMES_THRESH 30
	frames before a DTX hangover is assumed

#define	DTX_HANG_CONST 7
	DTX hangover length in frames.

#define	ISF_DITH_GAP (448.0 / 32768.0)
	minimum ISF gap used by comfort noise dithering

#define	ISF_DITH_FAC_LOW (256.0 / 32768.0)
	lowest ISF dithering factor

#define	ISF_DITH_FAC_STEP (2.0 / 32768.0)
	ISF dithering factor increment.

#define	CN_DITH_GAIN_FAC (150.0 / 512.0)
	energy dithering factor

#define	CN_LOG_EN_INIT (3500.0 / 512.0)
	initial comfort noise log2 energy

#define	CN_LOG_EN_HIST_INIT ((3500 >> 3) / 128.0)
	initial value of the energy history

#define	CN_LOG_EN_MUTE_STEP (1.0 / 8.0)
	log2 energy decrease per muted frame (-3/8 dB)

#define	CN_NOISE_SEED_INIT 21845
	initial seed of the comfort noise generator

#define	AMRWB_SFR_SIZE 64
	samples per subframe at 12.8 kHz

#define	AMRWB_SFR_SIZE_16k 80
	samples per subframe at 16 kHz

#define	AMRWB_P_DELAY_MAX 231
	maximum pitch delay value

#define	AMRWB_P_DELAY_MIN 34

#define	AMR_BIT(field)
	The index of a frame parameter.

#define	AMR_OF(frame_num, variable)
	The index of a subframe-specific parameter.

Enumerations
enum	Mode { MODE_6k60 = 0 , MODE_8k85 , MODE_12k65 , MODE_14k25 , MODE_15k85 , MODE_18k25 , MODE_19k85 , MODE_23k05 , MODE_23k85 , MODE_SID , SP_LOST = 14 , NO_DATA }

Variables
static const uint16_t	order_MODE_6k60 []

static const uint16_t	order_MODE_8k85 []

static const uint16_t	order_MODE_12k65 []

static const uint16_t	order_MODE_14k25 []

static const uint16_t	order_MODE_15k85 []

static const uint16_t	order_MODE_18k25 []

static const uint16_t	order_MODE_19k85 []

static const uint16_t	order_MODE_23k05 []

static const uint16_t	order_MODE_23k85 []

static const uint16_t *const	amr_bit_orderings_by_mode []
	Reordering array addresses for each mode.

static const int16_t	dico1_isf [256][9]
	Indexed tables for retrieval of quantized ISF vectors in Q15.

static const int16_t	dico2_isf [256][7]

static const int16_t	dico21_isf [64][3]

static const int16_t	dico22_isf [128][3]

static const int16_t	dico23_isf [128][3]

static const int16_t	dico24_isf [32][3]

static const int16_t	dico25_isf [32][4]

static const int16_t	dico21_isf_36b [128][5]

static const int16_t	dico22_isf_36b [128][4]

static const int16_t	dico23_isf_36b [64][7]

static const int16_t	isf_mean [LP_ORDER]
	Means of ISF vectors in Q15.

static const int16_t	isf_init [LP_ORDER]
	Initialization tables for the processed ISF vector in Q15.

static const int16_t	mean_isf_noise [16]
	Means of ISF vectors for background noise in Q15.

static const int16_t	dico1_isf_noise [64][2]
	Indexed tables for retrieval of quantized background noise ISF vectors in Q15 (split-by-5 VQ: 2+3+3+4+4 entries per set of indices)

static const int16_t	dico2_isf_noise [64][3]

static const int16_t	dico3_isf_noise [64][3]

static const int16_t	dico4_isf_noise [32][4]

static const int16_t	dico5_isf_noise [32][4]

static const float	isfp_inter [4] = { 0.45, 0.8, 0.96, 1.0 }
	ISF/ISP interpolation coefficients for each subframe.

static const float	ac_inter [65]
	Coefficients for FIR interpolation of excitation vector at pitch lag resulting the adaptive codebook vector.

static const uint8_t	pulses_nb_per_mode_tr [][4]
	[i][j] is the number of pulses present in track j at mode i

static const int16_t	qua_gain_6b [64][2]
	Tables for decoding quantized gains { pitch (Q14), fixed factor (Q11) }.

static const int16_t	qua_gain_7b [128][2]

static const float	energy_pred_fac [4] = { 0.2, 0.3, 0.4, 0.5 }
	4-tap moving average prediction coefficients in reverse order

static const float	ir_filter_str [64]
	impulse response filter tables converted to float from Q15 used for anti-sparseness processing

static const float	ir_filter_mid [64]

static const float *const	ir_filters_lookup [2]

static const float	hpf_zeros [2] = { -2.0, 1.0 }
	High-pass filters coefficients for 31 Hz and 400 Hz cutoff.

static const float	hpf_31_poles [2] = { -1.978881836, 0.979125977 }

static const float	hpf_31_gain = 0.989501953

static const float	hpf_400_poles [2] = { -1.787109375, 0.864257812 }

static const float	hpf_400_gain = 0.893554687

static const float	upsample_fir [4][24]
	Interpolation coefficients for 5/4 signal upsampling Table from the reference source was reordered for efficiency.

static const uint16_t	qua_hb_gain [16]
	High band quantized gains for 23k85 in Q14.

static const float	bpf_6_7_coef [31]
	High-band post-processing FIR filters coefficients from Q15.

static const float	lpf_7_coef [31]

static const uint16_t	cf_sizes_wb []
	Core frame sizes in each mode.

Detailed Description

AMR wideband data and definitions.

Definition in file amrwbdata.h.

Macro Definition Documentation

◆ LP_ORDER

#define LP_ORDER 16

linear predictive coding filter order

Definition at line 33 of file amrwbdata.h.

Referenced by amrwb_decode_frame(), amrwb_decode_init(), auto_correlation(), cn_dithering(), cn_frame(), decode_isf_noise(), decode_pitch_vector(), dtx_activity_update(), dtx_dec(), extrapolate_isf(), hb_synthesis(), interpolate_isp(), isf_add_mean_and_past(), stability_factor(), subframe_output(), synthesis(), and update_sub_state().

◆ LP_ORDER_16k

#define LP_ORDER_16k 20

lpc filter order at 16kHz

Definition at line 34 of file amrwbdata.h.

Referenced by extrapolate_isf(), hb_synthesis(), subframe_output(), and update_sub_state().

◆ HB_FIR_SIZE

#define HB_FIR_SIZE 30

amount of past data needed by HB filters

Definition at line 35 of file amrwbdata.h.

Referenced by hb_fir_filter().

◆ UPS_FIR_SIZE

#define UPS_FIR_SIZE 12

upsampling filter size

Definition at line 36 of file amrwbdata.h.

Referenced by subframe_output(), and upsample_5_4().

◆ UPS_MEM_SIZE

#define UPS_MEM_SIZE (2 * UPS_FIR_SIZE)

Definition at line 37 of file amrwbdata.h.

Referenced by subframe_output(), update_sub_state(), and upsample_5_4().

◆ MIN_ISF_SPACING

#define MIN_ISF_SPACING (128.0 / 32768.0)

minimum isf gap

Definition at line 39 of file amrwbdata.h.

Referenced by amrwb_decode_frame(), cn_dithering(), cn_frame(), and decode_isf_noise().

◆ PRED_FACTOR

#define PRED_FACTOR (1.0 / 3.0)

Definition at line 40 of file amrwbdata.h.

Referenced by isf_add_mean_and_past().

◆ MIN_ENERGY

#define MIN_ENERGY -14.0

initial innovation energy (dB)

Definition at line 41 of file amrwbdata.h.

◆ ENERGY_MEAN

#define ENERGY_MEAN 30.0

mean innovation energy (dB) in all modes

Definition at line 42 of file amrwbdata.h.

Referenced by amrwb_decode_frame().

◆ PREEMPH_FAC

#define PREEMPH_FAC 0.68

factor used to de-emphasize synthesis

Definition at line 43 of file amrwbdata.h.

Referenced by subframe_output().

◆ DTX_HIST_SIZE

#define DTX_HIST_SIZE 8

frames kept for comfort noise parameter averaging

Definition at line 46 of file amrwbdata.h.

◆ DTX_MAX_EMPTY_THRESH

#define DTX_MAX_EMPTY_THRESH 50

frames without SID update before muting

Definition at line 47 of file amrwbdata.h.

◆ DTX_ELAPSED_FRAMES_THRESH

#define DTX_ELAPSED_FRAMES_THRESH 30

frames before a DTX hangover is assumed

Definition at line 48 of file amrwbdata.h.

◆ DTX_HANG_CONST

#define DTX_HANG_CONST 7

DTX hangover length in frames.

Definition at line 49 of file amrwbdata.h.

◆ ISF_DITH_GAP

#define ISF_DITH_GAP (448.0 / 32768.0)

minimum ISF gap used by comfort noise dithering

Definition at line 50 of file amrwbdata.h.

Referenced by cn_dithering().

◆ ISF_DITH_FAC_LOW

#define ISF_DITH_FAC_LOW (256.0 / 32768.0)

lowest ISF dithering factor

Definition at line 51 of file amrwbdata.h.

Referenced by cn_dithering().

◆ ISF_DITH_FAC_STEP

#define ISF_DITH_FAC_STEP (2.0 / 32768.0)

ISF dithering factor increment.

Definition at line 52 of file amrwbdata.h.

Referenced by cn_dithering().

◆ CN_DITH_GAIN_FAC

#define CN_DITH_GAIN_FAC (150.0 / 512.0)

energy dithering factor

Definition at line 53 of file amrwbdata.h.

Referenced by cn_dithering().

◆ CN_LOG_EN_INIT

#define CN_LOG_EN_INIT (3500.0 / 512.0)

initial comfort noise log2 energy

Definition at line 54 of file amrwbdata.h.

Referenced by amrwb_decode_init().

◆ CN_LOG_EN_HIST_INIT

#define CN_LOG_EN_HIST_INIT ((3500 >> 3) / 128.0)

initial value of the energy history

Definition at line 55 of file amrwbdata.h.

Referenced by amrwb_decode_init().

◆ CN_LOG_EN_MUTE_STEP

#define CN_LOG_EN_MUTE_STEP (1.0 / 8.0)

log2 energy decrease per muted frame (-3/8 dB)

Definition at line 56 of file amrwbdata.h.

Referenced by dtx_dec().

◆ CN_NOISE_SEED_INIT

#define CN_NOISE_SEED_INIT 21845

initial seed of the comfort noise generator

Definition at line 57 of file amrwbdata.h.

Referenced by amrwb_decode_init().

◆ AMRWB_SFR_SIZE

#define AMRWB_SFR_SIZE 64

samples per subframe at 12.8 kHz

Definition at line 59 of file amrwbdata.h.

Referenced by amrwb_decode_frame(), anti_sparseness(), cn_frame(), de_emphasis(), decode_fixed_vector(), decode_pitch_vector(), dtx_activity_update(), dtx_dec(), find_hb_gain(), pitch_enhancer(), pitch_sharpening(), scaled_hb_excitation(), subframe_output(), synthesis(), update_sub_state(), and voice_factor().

◆ AMRWB_SFR_SIZE_16k

#define AMRWB_SFR_SIZE_16k 80

samples per subframe at 16 kHz

Definition at line 60 of file amrwbdata.h.

Referenced by amrwb_decode_frame(), cn_frame(), hb_fir_filter(), hb_synthesis(), scaled_hb_excitation(), subframe_output(), and update_sub_state().

◆ AMRWB_P_DELAY_MAX

#define AMRWB_P_DELAY_MAX 231

maximum pitch delay value

Definition at line 61 of file amrwbdata.h.

Referenced by amrwb_decode_init(), decode_pitch_lag_high(), decode_pitch_lag_low(), and update_sub_state().

◆ AMRWB_P_DELAY_MIN

#define AMRWB_P_DELAY_MIN 34

Definition at line 62 of file amrwbdata.h.

Referenced by decode_pitch_lag_high(), and decode_pitch_lag_low().

◆ AMR_BIT

#define AMR_BIT ( field )

Value:

(offsetof(AMRWBFrame, field))

AMRWBFrame

Definition amrwbdata.h:92

The index of a frame parameter.

Definition at line 99 of file amrwbdata.h.

◆ AMR_OF

#define AMR_OF	(		frame_num,
			variable )

Value:

AMR_BIT(subframe[frame_num].variable)

AMR_BIT

#define AMR_BIT(field)

The index of a frame parameter.

Definition amrnbdata.h:74

The index of a subframe-specific parameter.

Definition at line 101 of file amrwbdata.h.

Enumeration Type Documentation

◆ Mode

enum Mode

Enumerator
MODE_6k60	6.60 kbit/s
MODE_8k85	8.85 kbit/s
MODE_12k65	12.65 kbit/s
MODE_14k25	14.25 kbit/s
MODE_15k85	15.85 kbit/s
MODE_18k25	18.25 kbit/s
MODE_19k85	19.85 kbit/s
MODE_23k05	23.05 kbit/s
MODE_23k85	23.85 kbit/s
MODE_SID	comfort noise frame
SP_LOST	speech lost
NO_DATA	no transmission

Definition at line 65 of file amrwbdata.h.

Variable Documentation

◆ order_MODE_6k60

const uint16_t order_MODE_6k60[]

static

Initial value:

= {
     1,         AMR_BIT(vad),   7,
     8,   AMR_BIT(isp_id[0]),  24,  33,  39,  12,   6,   5,   4,  13,
     8,   AMR_BIT(isp_id[1]),  65,  79,  64,  78,  51,  61,  71,  70,
     7,   AMR_BIT(isp_id[2]),  52,  55,  44,  54,  53,  43,  42,
     7,   AMR_BIT(isp_id[3]),  60,  59,  58,  57,  56,  75,  74,
     6,   AMR_BIT(isp_id[4]),  73,  72,  86,  87,  85,  84,
     8,      AMR_OF(0, adap),  11,  10,   9,   8,  28,  27,  49,  69,
     6, AMR_OF(0, pul_il[0]),  83,  91,  99, 107, 115, 123,
     6, AMR_OF(0, pul_il[1]),  82, 103, 111, 119, 127, 135,
     6,   AMR_OF(0, vq_gain),  38,  23,  34,  19,   3,  15,
     5,      AMR_OF(1, adap),  32,  41,  63,  67,  77,
     6, AMR_OF(1, pul_il[0]),  81,  90,  98, 106, 114, 122,
     6, AMR_OF(1, pul_il[1]),  80, 102, 110, 118, 126, 134,
     6,   AMR_OF(1, vq_gain),  26,  22,  36,  18,   2,  14,
     5,      AMR_OF(2, adap),  45,  40,  50,  48,  68,
     6, AMR_OF(2, pul_il[0]),  95,  89,  97, 105, 113, 121,
     6, AMR_OF(2, pul_il[1]),  94, 101, 109, 117, 125, 133,
     6,   AMR_OF(2, vq_gain),  37,  21,  35,  17,   1,  31,
     5,      AMR_OF(3, adap),  47,  46,  62,  66,  76,
     6, AMR_OF(3, pul_il[0]),  93,  88,  96, 104, 112, 120,
     6, AMR_OF(3, pul_il[1]),  92, 100, 108, 116, 124, 132,
     6,   AMR_OF(3, vq_gain),  25,  20,  29,  16,   0,  30,
     0
}

Definition at line 113 of file amrwbdata.h.

◆ order_MODE_8k85

const uint16_t order_MODE_8k85[]

static

Definition at line 139 of file amrwbdata.h.

◆ order_MODE_12k65

const uint16_t order_MODE_12k65[]

static

Definition at line 175 of file amrwbdata.h.

◆ order_MODE_14k25

const uint16_t order_MODE_14k25[]

static

Definition at line 233 of file amrwbdata.h.

◆ order_MODE_15k85

const uint16_t order_MODE_15k85[]

static

Definition at line 291 of file amrwbdata.h.

◆ order_MODE_18k25

const uint16_t order_MODE_18k25[]

static

Definition at line 349 of file amrwbdata.h.

◆ order_MODE_19k85

const uint16_t order_MODE_19k85[]

static

Definition at line 423 of file amrwbdata.h.

◆ order_MODE_23k05

const uint16_t order_MODE_23k05[]

static

Definition at line 505 of file amrwbdata.h.

◆ order_MODE_23k85

const uint16_t order_MODE_23k85[]

static

Definition at line 595 of file amrwbdata.h.

◆ amr_bit_orderings_by_mode

const uint16_t* const amr_bit_orderings_by_mode[]

static

Initial value:

= {
    order_MODE_6k60,
    order_MODE_8k85,
    order_MODE_12k65,
    order_MODE_14k25,
    order_MODE_15k85,
    order_MODE_18k25,
    order_MODE_19k85,
    order_MODE_23k05,
    order_MODE_23k85
}

Reordering array addresses for each mode.

Definition at line 690 of file amrwbdata.h.

Referenced by amrwb_decode_frame().

◆ dico1_isf

const int16_t dico1_isf[256][9]

static

Indexed tables for retrieval of quantized ISF vectors in Q15.

Definition at line 706 of file amrwbdata.h.

Referenced by decode_isf_indices_36b(), and decode_isf_indices_46b().

◆ dico2_isf

const int16_t dico2_isf[256][7]

static

Definition at line 965 of file amrwbdata.h.

Referenced by decode_isf_indices_36b(), and decode_isf_indices_46b().

◆ dico21_isf

const int16_t dico21_isf[64][3]

static

Definition at line 1224 of file amrwbdata.h.

Referenced by decode_isf_indices_46b().

◆ dico22_isf

const int16_t dico22_isf[128][3]

static

Definition at line 1259 of file amrwbdata.h.

Referenced by decode_isf_indices_46b().

◆ dico23_isf

const int16_t dico23_isf[128][3]

static

Definition at line 1326 of file amrwbdata.h.

Referenced by decode_isf_indices_46b().

◆ dico24_isf

const int16_t dico24_isf[32][3]

static

Initial value:

= {
 {   -79,   -89,    -4}, {  -171,    77,  -211},
 {   160,  -193,    98}, {   120,  -103,   323},
 {    32,   -22,  -129}, {    72,    78,  -268},
 {   182,   -76,   -66}, {   309,    99,  -145},
 {  -229,  -157,   -84}, {  -383,    98,   -71},
 {   -90,  -352,    12}, {  -284,  -178,   178},
 {   -65,  -125,  -166}, {   -87,  -175,  -351},
 {    42,  -198,   -48}, {   154,  -140,  -243},
 {   -77,    18,   108}, {   -39,   355,    91},
 {    87,     8,   155}, {    -4,   158,   239},
 {   128,    95,   -54}, {     7,   246,  -124},
 {   258,    15,    89}, {   206,   216,    98},
 {  -201,     9,    18}, {  -312,   233,   204},
 {   -39,  -174,   155}, {  -144,    -9,   284},
 {   -57,    70,   -69}, {  -157,   187,    18},
 {    54,   -30,    23}, {    24,   135,    55}
}

Definition at line 1393 of file amrwbdata.h.

Referenced by decode_isf_indices_46b().

◆ dico25_isf

const int16_t dico25_isf[32][4]

static

Initial value:

= {
 {   169,   142,  -119,   115}, {   206,   -20,    94,   226},
 {  -106,   313,   -21,    16}, {   -62,   161,    71,   255},
 {   -89,   101,  -185,   125}, {    72,   -30,  -201,   344},
 {  -258,    33,    -8,    81}, {  -104,  -154,    72,   296},
 {   144,   -68,  -268,   -25}, {    81,   -78,   -87,   106},
 {    22,   155,  -186,  -119}, {   -46,   -28,    27,    91},
 {  -114,   -37,  -175,   -33}, {   -94,  -222,  -189,   122},
 {  -132,  -119,  -191,  -270}, {  -172,  -173,    18,   -43},
 {   279,   135,   -42,  -128}, {   187,   -86,   229,  -138},
 {   159,   240,   140,    46}, {    69,    25,   227,    77},
 {    21,   115,    13,     8}, {    68,  -248,   126,    81},
 {  -150,   137,   207,    -9}, {  -154,  -133,   289,    67},
 {   143,   -37,   -86,  -326}, {   180,   -32,    19,   -23},
 {    26,   168,   116,  -233}, {   -32,   -26,   118,   -78},
 {     3,    -8,   -45,  -115}, {    57,  -215,   -54,   -83},
 {  -209,   112,   -22,  -167}, {   -91,  -151,   168,  -262}
}

Definition at line 1412 of file amrwbdata.h.

Referenced by decode_isf_indices_46b().

◆ dico21_isf_36b

const int16_t dico21_isf_36b[128][5]

static

Definition at line 1431 of file amrwbdata.h.

Referenced by decode_isf_indices_36b().

◆ dico22_isf_36b

const int16_t dico22_isf_36b[128][4]

static

Definition at line 1498 of file amrwbdata.h.

Referenced by decode_isf_indices_36b().

◆ dico23_isf_36b

const int16_t dico23_isf_36b[64][7]

static

Definition at line 1565 of file amrwbdata.h.

Referenced by decode_isf_indices_36b().

◆ isf_mean

const int16_t isf_mean[LP_ORDER]

static

Initial value:

= {
   738,  1326,  2336,  3578,  4596,  5662,  6711,  7730,
  8750,  9753, 10705, 11728, 12833, 13971, 15043,  4037
}

Means of ISF vectors in Q15.

Definition at line 1633 of file amrwbdata.h.

Referenced by isf_add_mean_and_past().

◆ isf_init

const int16_t isf_init[LP_ORDER]

static

Initial value:

= {
  1024,  2048,  3072,  4096,  5120,  6144,  7168, 8192,
  9216, 10240, 11264, 12288, 13312, 14336, 15360, 3840
}

Initialization tables for the processed ISF vector in Q15.

Definition at line 1639 of file amrwbdata.h.

Referenced by amrwb_decode_init().

◆ mean_isf_noise

const int16_t mean_isf_noise[16]

static

Initial value:

= {
   478, 1100, 2213, 3267, 4219, 5222, 6198, 7240,
  8229, 9153,10098,11108,12144,13184,14165, 3803
}

Means of ISF vectors for background noise in Q15.

Definition at line 1649 of file amrwbdata.h.

Referenced by decode_isf_noise().

◆ dico1_isf_noise

const int16_t dico1_isf_noise[64][2]

static

Indexed tables for retrieval of quantized background noise ISF vectors in Q15 (split-by-5 VQ: 2+3+3+4+4 entries per set of indices)

Definition at line 1659 of file amrwbdata.h.

Referenced by decode_isf_noise().

◆ dico2_isf_noise

const int16_t dico2_isf_noise[64][3]

static

Definition at line 1726 of file amrwbdata.h.

Referenced by decode_isf_noise().

◆ dico3_isf_noise

const int16_t dico3_isf_noise[64][3]

static

Definition at line 1793 of file amrwbdata.h.

Referenced by decode_isf_noise().

◆ dico4_isf_noise

const int16_t dico4_isf_noise[32][4]

static

Definition at line 1860 of file amrwbdata.h.

Referenced by decode_isf_noise().

◆ dico5_isf_noise

const int16_t dico5_isf_noise[32][4]

static

Definition at line 1895 of file amrwbdata.h.

Referenced by decode_isf_noise().

◆ isfp_inter

const float isfp_inter[4] = { 0.45, 0.8, 0.96, 1.0 }

static

ISF/ISP interpolation coefficients for each subframe.

Definition at line 1931 of file amrwbdata.h.

Referenced by hb_synthesis(), and interpolate_isp().

◆ ac_inter

const float ac_inter[65]

static

Initial value:

= {
     9.400024e-01,
     8.563843e-01,  6.322632e-01,  3.375854e-01,  5.908203e-02,
    -1.310425e-01, -1.994019e-01, -1.585693e-01, -5.633545e-02,
     4.760742e-02,  1.067505e-01,  1.036987e-01,  5.206299e-02,
    -1.519775e-02, -6.372070e-02, -7.366943e-02, -4.650879e-02,
    -9.765625e-04,  3.820801e-02,  5.316162e-02,  4.003906e-02,
     9.338379e-03, -2.166748e-02, -3.778076e-02, -3.320312e-02,
    -1.300049e-02,  1.068115e-02,  2.587891e-02,  2.630615e-02,
     1.379395e-02, -3.662109e-03, -1.678467e-02, -1.983643e-02,
    -1.275635e-02, -5.493164e-04,  1.007080e-02,  1.409912e-02,
     1.068115e-02,  2.624512e-03, -5.371094e-03, -9.338379e-03,
    -8.117676e-03, -3.173828e-03,  2.319336e-03,  5.615234e-03,
     5.554199e-03,  2.868652e-03, -6.103516e-04, -2.990723e-03,
    -3.356934e-03, -2.014160e-03, -1.220703e-04,  1.342773e-03,
     1.708984e-03,  1.159668e-03,  2.441406e-04, -4.272461e-04,
    -6.103516e-04, -4.272461e-04, -1.220703e-04,  6.103516e-05,
     1.220703e-04,  6.103516e-05,  0.000000e+00,  0.000000e+00
}

Coefficients for FIR interpolation of excitation vector at pitch lag resulting the adaptive codebook vector.

Definition at line 1935 of file amrwbdata.h.

Referenced by decode_pitch_vector().

◆ pulses_nb_per_mode_tr

const uint8_t pulses_nb_per_mode_tr[][4]

static

Initial value:

= {
    {1, 1, 0, 0}, {1, 1, 1, 1}, {2, 2, 2, 2},
    {3, 3, 2, 2}, {3, 3, 3, 3}, {4, 4, 4, 4},
    {5, 5, 4, 4}, {6, 6, 6, 6}, {6, 6, 6, 6}
}

[i][j] is the number of pulses present in track j at mode i

Definition at line 1956 of file amrwbdata.h.

Referenced by decode_fixed_vector().

◆ qua_gain_6b

const int16_t qua_gain_6b[64][2]

static

Tables for decoding quantized gains { pitch (Q14), fixed factor (Q11) }.

Definition at line 1963 of file amrwbdata.h.

Referenced by decode_gains().

◆ qua_gain_7b

const int16_t qua_gain_7b[128][2]

static

Definition at line 1998 of file amrwbdata.h.

Referenced by decode_gains().

◆ energy_pred_fac

const float energy_pred_fac[4] = { 0.2, 0.3, 0.4, 0.5 }

static

4-tap moving average prediction coefficients in reverse order

Definition at line 2066 of file amrwbdata.h.

◆ ir_filter_str

const float ir_filter_str[64]

static

Initial value:

= {
     6.159058e-01,  2.958069e-01,  9.979248e-02, -1.048889e-01,
     8.740234e-02, -1.599121e-01,  4.849243e-02, -4.141235e-02,
     1.831055e-02,  1.188049e-01, -4.568481e-02, -2.130127e-02,
     3.671265e-02, -1.601868e-01,  3.659058e-02,  1.639099e-01,
    -4.541016e-02, -2.151489e-02, -8.810425e-02,  6.030273e-02,
     2.740479e-02,  2.200317e-02, -1.182861e-01,  1.289978e-01,
    -1.560059e-01,  1.953125e-01, -3.149414e-02, -1.441956e-01,
     1.249084e-01, -1.328125e-01,  9.780884e-02,  6.500244e-02,
    -6.091309e-02, -5.599976e-02,  8.081055e-02, -5.450439e-02,
    -1.239014e-02,  1.748657e-02,  7.580566e-02, -1.101074e-01,
     9.579468e-02, -4.159546e-02, -7.830811e-02,  1.162109e-01,
    -1.950073e-02, -6.259155e-02, -1.651001e-02,  7.250977e-02,
     1.199951e-01, -1.911011e-01,  4.370117e-02, -1.098938e-01,
     1.492004e-01,  1.129150e-02,  1.730347e-02, -3.549194e-02,
    -8.709717e-02,  5.841064e-02,  1.190186e-03, -7.379150e-02,
     1.054077e-01,  9.078979e-02, -1.227112e-01,  1.047058e-01
}

impulse response filter tables converted to float from Q15 used for anti-sparseness processing

Definition at line 2070 of file amrwbdata.h.

◆ ir_filter_mid

const float ir_filter_mid[64]

static

Initial value:

= {
     7.354126e-01,  3.192139e-01, -1.606140e-01, -2.328491e-02,
     6.250000e-02, -2.828979e-02,  5.349731e-02, -1.014099e-01,
     6.750488e-02,  1.989746e-02, -6.549072e-02,  7.589722e-02,
    -1.080017e-01,  1.253967e-01, -6.430054e-02, -1.141357e-02,
    -1.910400e-02,  1.303101e-01, -1.673889e-01,  6.820679e-02,
     5.670166e-02, -8.450317e-02,  2.270508e-02,  3.479004e-02,
    -2.328491e-02, -4.928589e-02,  1.239014e-01, -1.395874e-01,
     9.100342e-02, -3.549194e-02,  2.230835e-02, -3.350830e-02,
     2.450562e-02,  5.096436e-03, -2.178955e-02,  1.849365e-02,
    -1.708984e-02,  1.950073e-02,  1.312256e-03, -5.389404e-02,
     9.851074e-02, -8.489990e-02,  2.029419e-02,  2.328491e-02,
     7.110596e-03, -6.109619e-02,  3.939819e-02,  5.709839e-02,
    -1.058960e-01,  3.149414e-02,  8.270264e-02, -1.232910e-01,
     1.105957e-01, -1.286011e-01,  1.614990e-01, -1.303101e-01,
     4.769897e-02,  3.295898e-03, -1.770020e-02,  5.010986e-02,
    -7.501221e-02,  2.920532e-02,  1.660156e-02,  7.751465e-02
}

Definition at line 2089 of file amrwbdata.h.

◆ ir_filters_lookup

const float* const ir_filters_lookup[2]

static

Initial value:

= {
    ir_filter_str, ir_filter_mid
}

Definition at line 2108 of file amrwbdata.h.

◆ hpf_zeros

const float hpf_zeros[2] = { -2.0, 1.0 }

static

High-pass filters coefficients for 31 Hz and 400 Hz cutoff.

Definition at line 2113 of file amrwbdata.h.

Referenced by subframe_output().

◆ hpf_31_poles

const float hpf_31_poles[2] = { -1.978881836, 0.979125977 }

static

Definition at line 2114 of file amrwbdata.h.

Referenced by subframe_output().

◆ hpf_31_gain

const float hpf_31_gain = 0.989501953

static

Definition at line 2115 of file amrwbdata.h.

Referenced by subframe_output().

◆ hpf_400_poles

const float hpf_400_poles[2] = { -1.787109375, 0.864257812 }

static

Definition at line 2117 of file amrwbdata.h.

Referenced by subframe_output().

◆ hpf_400_gain

const float hpf_400_gain = 0.893554687

static

Definition at line 2118 of file amrwbdata.h.

Referenced by subframe_output().

◆ upsample_fir

const float upsample_fir[4][24]

static

Initial value:

= {
    { -6.103516e-05,  7.324219e-04, -2.014160e-03,  4.150391e-03,
      -7.263184e-03,  1.165771e-02, -1.776123e-02,  2.624512e-02,
      -3.869629e-02,  5.877686e-02, -9.863281e-02,  2.314453e-01,
       9.348755e-01, -1.523438e-01,  7.861328e-02, -4.937744e-02,
       3.308105e-02, -2.252197e-02,  1.507568e-02, -9.765625e-03,
       5.859375e-03, -3.173828e-03,  1.403809e-03, -3.662109e-04  },
    { -2.441406e-04,  1.464844e-03, -3.784180e-03,  7.568359e-03,
      -1.300049e-02,  2.062988e-02, -3.112793e-02,  4.589844e-02,
      -6.781006e-02,  1.042480e-01, -1.815186e-01,  5.016479e-01,
       7.548828e-01, -2.094727e-01,  1.148071e-01, -7.348633e-02,
       4.956055e-02, -3.369141e-02,  2.246094e-02, -1.434326e-02,
       8.483887e-03, -4.455566e-03,  1.831055e-03, -4.272461e-04  },
    { -4.272461e-04,  1.831055e-03, -4.455566e-03,  8.483887e-03,
      -1.434326e-02,  2.246094e-02, -3.369141e-02,  4.956055e-02,
      -7.348633e-02,  1.148071e-01, -2.094727e-01,  7.548828e-01,
       5.016479e-01, -1.815186e-01,  1.042480e-01, -6.781006e-02,
       4.589844e-02, -3.112793e-02,  2.062988e-02, -1.300049e-02,
       7.568359e-03, -3.784180e-03,  1.464844e-03, -2.441406e-04  },
    { -3.662109e-04,  1.403809e-03, -3.173828e-03,  5.859375e-03,
      -9.765625e-03,  1.507568e-02, -2.252197e-02,  3.308105e-02,
      -4.937744e-02,  7.861328e-02, -1.523438e-01,  9.348755e-01,
       2.314453e-01, -9.863281e-02,  5.877686e-02, -3.869629e-02,
       2.624512e-02, -1.776123e-02,  1.165771e-02, -7.263184e-03,
       4.150391e-03, -2.014160e-03,  7.324219e-04, -6.103516e-05  }
}

Interpolation coefficients for 5/4 signal upsampling Table from the reference source was reordered for efficiency.

Definition at line 2122 of file amrwbdata.h.

Referenced by upsample_5_4().

◆ qua_hb_gain

const uint16_t qua_hb_gain[16]

static

Initial value:

= {
   3624, 4673, 5597, 6479, 7425, 8378, 9324, 10264,
   11210, 12206, 13391, 14844, 16770, 19655, 24289, 32728
}

High band quantized gains for 23k85 in Q14.

Definition at line 2150 of file amrwbdata.h.

Referenced by find_hb_gain().

◆ bpf_6_7_coef

const float bpf_6_7_coef[31]

static

Initial value:

= { 
    -2.441406e-04,  3.585815e-04,  2.441406e-04,
    -2.059937e-04, -2.815248e-03,  8.560180e-03,
    -1.084137e-02,  0.000000e+00,  2.897645e-02,
    -6.774902e-02,  9.421540e-02, -8.380128e-02,
     2.706910e-02,  5.924987e-02, -1.373367e-01,
     1.687469e-01,
    -1.373367e-01,  5.924987e-02,  2.706910e-02,
    -8.380128e-02,  9.421540e-02, -6.774902e-02,
     2.897645e-02,  0.000000e+00, -1.084137e-02,
     8.560180e-03, -2.815248e-03, -2.059937e-04,
     2.441406e-04,  3.585815e-04, -2.441406e-04
}

High-band post-processing FIR filters coefficients from Q15.

Definition at line 2156 of file amrwbdata.h.

Referenced by subframe_output().

◆ lpf_7_coef

const float lpf_7_coef[31]

static

Initial value:

= { 
    -6.408691e-04,  1.434326e-03, -2.716064e-03,
     4.455566e-03, -6.195068e-03,  6.988525e-03,
    -5.401611e-03,  0.000000e+00,  1.022339e-02,
    -2.560425e-02,  4.531860e-02, -6.747437e-02,
     8.944702e-02, -1.080933e-01,  1.206360e-01,
     8.753052e-01,
     1.206360e-01, -1.080933e-01,  8.944702e-02,
    -6.747437e-02,  4.531860e-02, -2.560425e-02,
     1.022339e-02,  0.000000e+00, -5.401611e-03,
     6.988525e-03, -6.195068e-03,  4.455566e-03,
    -2.716064e-03,  1.434326e-03, -6.408691e-04
}

Definition at line 2170 of file amrwbdata.h.

Referenced by subframe_output().

◆ cf_sizes_wb

const uint16_t cf_sizes_wb[]

static

Initial value:

= {
    132, 177, 253, 285, 317, 365, 397, 461, 477,
    40, 0, 0, 0, 0, 0, 0
}

Core frame sizes in each mode.

Definition at line 2185 of file amrwbdata.h.

Referenced by amrwb_decode_frame().

Data Structures

Macros

Enumerations

Variables

Detailed Description

Macro Definition Documentation

◆ LP_ORDER

◆ LP_ORDER_16k

◆ HB_FIR_SIZE

◆ UPS_FIR_SIZE

◆ UPS_MEM_SIZE

◆ MIN_ISF_SPACING

◆ PRED_FACTOR

◆ MIN_ENERGY

◆ ENERGY_MEAN

◆ PREEMPH_FAC

◆ DTX_HIST_SIZE

◆ DTX_MAX_EMPTY_THRESH

◆ DTX_ELAPSED_FRAMES_THRESH

◆ DTX_HANG_CONST

◆ ISF_DITH_GAP

◆ ISF_DITH_FAC_LOW

◆ ISF_DITH_FAC_STEP

◆ CN_DITH_GAIN_FAC

◆ CN_LOG_EN_INIT

◆ CN_LOG_EN_HIST_INIT

◆ CN_LOG_EN_MUTE_STEP

◆ CN_NOISE_SEED_INIT

◆ AMRWB_SFR_SIZE

◆ AMRWB_SFR_SIZE_16k

◆ AMRWB_P_DELAY_MAX

◆ AMRWB_P_DELAY_MIN

◆ AMR_BIT

◆ AMR_OF

Enumeration Type Documentation

◆ Mode

Variable Documentation

◆ order_MODE_6k60

◆ order_MODE_8k85

◆ order_MODE_12k65

◆ order_MODE_14k25

◆ order_MODE_15k85

◆ order_MODE_18k25

◆ order_MODE_19k85

◆ order_MODE_23k05

◆ order_MODE_23k85

◆ amr_bit_orderings_by_mode

◆ dico1_isf

◆ dico2_isf

◆ dico21_isf

◆ dico22_isf

◆ dico23_isf

◆ dico24_isf

◆ dico25_isf

◆ dico21_isf_36b

◆ dico22_isf_36b

◆ dico23_isf_36b

◆ isf_mean

◆ isf_init

◆ mean_isf_noise

◆ dico1_isf_noise

◆ dico2_isf_noise

◆ dico3_isf_noise

◆ dico4_isf_noise

◆ dico5_isf_noise

◆ isfp_inter

◆ ac_inter

◆ pulses_nb_per_mode_tr

◆ qua_gain_6b

◆ qua_gain_7b

◆ energy_pred_fac

◆ ir_filter_str

◆ ir_filter_mid

◆ ir_filters_lookup

◆ hpf_zeros

◆ hpf_31_poles

◆ hpf_31_gain

◆ hpf_400_poles

◆ hpf_400_gain

◆ upsample_fir