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