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- /*
- *****************************************************************************
- *
- * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
- * R99 Version 3.3.0
- * REL-4 Version 4.1.0
- *
- *****************************************************************************
- *
- * File : cnst.h
- * Purpose : Speech codec constant parameters
- * : (encoder, decoder, and postfilter)
- *
- *****************************************************************************
- */
- #ifndef cnst_h
- #define cnst_h "$Id $"
- #define L_TOTAL 320 /* Total size of speech buffer. */
- #define L_WINDOW 240 /* Window size in LP analysis */
- #define L_FRAME 160 /* Frame size */
- #define L_FRAME_BY2 80 /* Frame size divided by 2 */
- #define L_SUBFR 40 /* Subframe size */
- #define L_CODE 40 /* codevector length */
- #define NB_TRACK 5 /* number of tracks */
- #define STEP 5 /* codebook step size */
- #define NB_TRACK_MR102 4 /* number of tracks mode mr102 */
- #define STEP_MR102 4 /* codebook step size mode mr102 */
- #define M 10 /* Order of LP filter */
- #define MP1 (M+1) /* Order of LP filter + 1 */
- #define LSF_GAP 205 /* Minimum distance between LSF after quan-
- tization; 50 Hz = 205 */
- #define LSP_PRED_FAC_MR122 21299 /* MR122 LSP prediction factor (0.65 Q15) */
- #define AZ_SIZE (4*M+4) /* Size of array of LP filters in 4 subfr.s */
- #define PIT_MIN_MR122 18 /* Minimum pitch lag (MR122 mode) */
- #define PIT_MIN 20 /* Minimum pitch lag (all other modes) */
- #define PIT_MAX 143 /* Maximum pitch lag */
- #define L_INTERPOL (10+1) /* Length of filter for interpolation */
- #define L_INTER_SRCH 4 /* Length of filter for CL LTP search
- interpolation */
-
- #define MU 26214 /* Factor for tilt compensation filter 0.8 */
- #define AGC_FAC 29491 /* Factor for automatic gain control 0.9 */
-
- #define L_NEXT 40 /* Overhead in LP analysis */
- #define SHARPMAX 13017 /* Maximum value of pitch sharpening */
- #define SHARPMIN 0 /* Minimum value of pitch sharpening */
-
-
- #define MAX_PRM_SIZE 57 /* max. num. of params */
- #define MAX_SERIAL_SIZE 244 /* max. num. of serial bits */
-
- #define GP_CLIP 15565 /* Pitch gain clipping = 0.95 */
- #define N_FRAME 7 /* old pitch gains in average calculation */
- #define EHF_MASK 0x0008 /* encoder homing frame pattern */
- #endif
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