ref: 17683ebefd7e806b16645ee4db1aec9cbdcde960
parent: 75e9c8607dbe82320d347804747972a8e47f7669
author: Jean-Marc Valin <[email protected]>
date: Mon Feb 18 16:45:19 EST 2008
minor change to critical bands definitions (nothing to see here)
--- a/libcelt/modes.c
+++ b/libcelt/modes.c
@@ -54,16 +54,17 @@
#define PBANDS 8
#define MIN_BINS 4
-/* Defining 25 critical bands for the full 0-20 kHz audio bandwidth */
+/* Defining 25 critical bands for the full 0-20 kHz audio bandwidth
+ Taken from http://ccrma.stanford.edu/~jos/bbt/Bark_Frequency_Scale.html */
#define BARK_BANDS 25
const celt_int16_t bark_freq[BARK_BANDS+1] = {- 0, 101, 200, 301, 405,
- 516, 635, 766, 912, 1077,
- 1263, 1476, 1720, 2003, 2333,
- 2721, 3184, 3742, 4428, 5285,
- 6376, 7791, 9662, 12181, 15624,
- 20397};
-
+ 0, 100, 200, 300, 400,
+ 510, 630, 770, 920, 1080,
+ 1270, 1480, 1720, 2000, 2320,
+ 2700, 3150, 3700, 4400, 5300,
+ 6400, 7700, 9500, 12000, 15500,
+ 20000};
+
const celt_int16_t pitch_freq[PBANDS+1] ={0, 345, 689, 1034, 1378, 2067, 3273, 5340, 6374};/* This allocation table is per critical band. When creating a mode, the bits get added together