Inside IMA ADPCM

By Tim Kientzle

Dr. Dobb's Journal November 1997

static const int _stepSizeTable[89] = {
   7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34,
   37, 41, 45, 50, 55, 60, 66, 73, 80, 88, 97, 107, 118, 130, 143,
   157, 173, 190, 209, 230, 253, 279, 307, 337, 371, 408, 449, 494,
   544, 598, 658, 724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552,
   1707, 1878, 2066, 2272, 2499, 2749, 3024, 3327, 3660, 4026,
   4428, 4871, 5358, 5894, 6484, 7132, 7845, 8630, 9493, 10442,
   11487, 12635, 13899, 15289, 16818, 18500, 20350, 22385, 24623,
   27086, 29794, 32767
};

Example 1: IMA ADPCM step size table.

Back to Article


Copyright © 1997, Dr. Dobb's Journal