Author: superdump
Date: Tue Sep 11 16:38:39 2007
New Revision: 1339
Log:
Clarify data array comments
Modified:
amr/amrdata.h
Modified: amr/amrdata.h
==============================================================================
--- amr/amrdata.h (original)
+++ amr/amrdata.h Tue Sep 11 16:38:39 2007
@@ -1124,7 +1124,7 @@ static const int16_t lsf_5_5[64][4] = {
{ 334, 475, 1095, 821}, { 864, 524, 843, 497}, { 714, 711, 788,
750}, { 1076, 714, 1204, 753}
};
-// interpolation filter for adaptive (pitch) codebook routines
+// b60 FIR filter coefficients (based on Hamming windowed sinc function)
static const int16_t inter6[61] = {
29443, 28346, 25207, 20449, 14701, 8693, 3143, -1352,
-4402, -5865, -5850, -4673, -2783, -672, 1211, 2536,
@@ -1139,7 +1139,7 @@ static const int16_t inter6[61] = {
// track start positions for fixed codebook routines
static const uint8_t track_position[16] = { 0, 2, 0, 3, 0, 2, 0, 3, 1, 3, 2,
4, 1, 4, 1, 4 };
-// gray decoding table for fixed codebook routines
+// 3-bit Gray code to binary lookup table
static const uint8_t dgray[8] = { 0, 1, 3, 2, 5, 6, 4, 7 };
// pitch gain tables
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