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htk.h
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3  /* Centre for Speech Technology Research */
4  /* University of Edinburgh, UK */
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31  /* */
32  /*************************************************************************/
33  /* */
34  /* Author: Richard Caley (rjc@cstr.ed.ac.uk) */
35  /* Date: Mon Nov 3 1997 */
36  /* -------------------------------------------------------------------- */
37  /* Defines for HTK format. */
38  /* */
39  /*************************************************************************/
40 
41 
42 
43 #ifndef __HTK_H__
44 #define __HTK_H__
45 
46 #define HTK_ENERGY 0x0040
47 #define HTK_NO_E 0x0080
48 #define HTK_DELTA 0x0100
49 #define HTK_AC 0x0200
50 #define HTK_COMP 0x0400
51 #define HTK_ZM 0x0800
52 #define HTK_CRC 0x1000
53 #define HTK_0CEP 0x2000
54 #define HTK_EST_PS 0x4000 // This is a local one and may become illegal
55 #define HTK_MASK 0x003f
56 
57 #define HTK_WAVE 0x0000
58 #define HTK_LPC 0x0001
59 #define HTK_LPCREFC 0x0002
60 #define HTK_LPCCEP 0x0003
61 #define HTK_LPDELCEP 0x0004
62 #define HTK_IREFC 0x0005
63 #define HTK_MFCC 0x0006
64 #define HTK_FBANK 0x0007
65 #define HTK_MELSPEC 0x0008
66 #define HTK_USER 0x0009
67 #define HTK_DISCRETE 0x000A
68 
69 
70 /* 100ns = 10 per us = 10 000 per ms = 10 000 000 per second*/
71 #define HTK_UNITS_PER_SECOND 10000000
72 
73 struct htk_header
74 {
75  int num_samps;
76  int samp_period; /* in 100ns units -design choice of the century*/
77  /* I don't think this is right -- awb, is this an old HTK format ? */
78  short samp_size; /* number of bytes per sample */
79  short samp_type; /* code from 0 to 10 indicating sample kind */
80  /* - see HTK reference manual, or #defs above */
81 };
82 
83 
84 #endif