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1 /*
2  * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
3  * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
4  * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
5  */
6 
7 /* $Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/table.c,v 1.1 1992/10/28 00:15:50 jutta Exp $ */
8 
9 /*  Most of these tables are inlined at their point of use.
10  */
11 
12 /*  4.4 TABLES USED IN THE FIXED POINT IMPLEMENTATION OF THE RPE-LTP
13  *      CODER AND DECODER
14  *
15  *	(Most of them inlined, so watch out.)
16  */
17 
18 #define	GSM_TABLE_C
19 #include "private.h"
20 #include	"gsm.h"
21 
22 /*  Table 4.1  Quantization of the Log.-Area Ratios
23  */
24 /* i 		     1      2      3        4      5      6        7       8 */
25 word gsm_A[8]   = {20480, 20480, 20480,  20480,  13964,  15360,   8534,  9036};
26 word gsm_B[8]   = {    0,     0,  2048,  -2560,     94,  -1792,   -341, -1144};
27 word gsm_MIC[8] = { -32,   -32,   -16,    -16,     -8,     -8,     -4,    -4 };
28 word gsm_MAC[8] = {  31,    31,    15,     15,      7,      7,      3,     3 };
29 
30 
31 /*  Table 4.2  Tabulation  of 1/A[1..8]
32  */
33 word gsm_INVA[8]={ 13107, 13107,  13107, 13107,  19223, 17476,  31454, 29708 };
34 
35 
36 /*   Table 4.3a  Decision level of the LTP gain quantizer
37  */
38 /*  bc		      0	        1	  2	     3			*/
39 word gsm_DLB[4] = {  6554,    16384,	26214,	   32767	};
40 
41 
42 /*   Table 4.3b   Quantization levels of the LTP gain quantizer
43  */
44 /* bc		      0          1        2          3			*/
45 word gsm_QLB[4] = {  3277,    11469,	21299,	   32767	};
46 
47 
48 /*   Table 4.4	 Coefficients of the weighting filter
49  */
50 /* i		    0      1   2    3   4      5      6     7   8   9    10  */
51 word gsm_H[11] = {-134, -374, 0, 2054, 5741, 8192, 5741, 2054, 0, -374, -134 };
52 
53 
54 /*   Table 4.5 	 Normalized inverse mantissa used to compute xM/xmax
55  */
56 /* i		 	0        1    2      3      4      5     6      7   */
57 word gsm_NRFAC[8] = { 29128, 26215, 23832, 21846, 20165, 18725, 17476, 16384 };
58 
59 
60 /*   Table 4.6	 Normalized direct mantissa used to compute xM/xmax
61  */
62 /* i                  0      1       2      3      4      5      6      7   */
63 word gsm_FAC[8]	= { 18431, 20479, 22527, 24575, 26623, 28671, 30719, 32767 };
64