FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/inter_36.tab @ 452:6e595f7d40e2
CHANGES: document changes for the upcoming release
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 10 May 2024 03:45:47 +0000 |
parents | 838ed426bb76 |
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1 /* |
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2 ******************************************************************************** |
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3 * |
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4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 |
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5 * R99 Version 3.3.0 |
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6 * REL-4 Version 4.1.0 |
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7 * |
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8 ******************************************************************************** |
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9 * |
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10 * File : inter_36.tab |
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11 * Purpose : Tables for interpolating the normalized correlation |
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12 * with 1/3 or 1/6 resolution. |
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13 * $Id $ |
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14 * |
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15 ******************************************************************************** |
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16 */ |
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17 #define FIR_SIZE (UP_SAMP_MAX*L_INTER_SRCH+1) |
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18 |
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19 /* 1/6 resolution interpolation filter (-3 dB at 3600 Hz) */ |
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20 /* Note: The IS641 (7.4) 1/3 resolution filter is simply a subsampled |
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21 version of the 1/6 resolution filter, i.e. it uses |
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22 every second coefficient: |
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23 |
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24 inter_3[k] = inter_6[2*k], 0 <= k <= 3*L_INTER_SRCH |
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25 */ |
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26 |
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27 static const Word16 inter_6[FIR_SIZE] = |
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28 { |
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29 29519, |
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30 28316, 24906, 19838, 13896, 7945, 2755, |
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31 -1127, -3459, -4304, -3969, -2899, -1561, |
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32 -336, 534, 970, 1023, 823, 516, |
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33 220, 0, -131, -194, -215, 0 |
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34 }; |