1mlib_SignalLPC2Cepstral_F32m(e3dMiLaILBi)b Library Fumnlcitbi_oSnisgnalLPC2Cepstral_F32(3MLIB)
2
3
4

NAME

6       mlib_SignalLPC2Cepstral_F32 - convert linear prediction coefficients to
7       cepstral coefficients
8

SYNOPSIS

10       cc [ flag... ] file... -lmlib [ library... ]
11       #include <mlib.h>
12
13       mlib_status mlib_SignalLPC2Cepstral_F32(mlib_f32 *cepst,
14            const mlib_f32 *lpc, mlib_f32 gain, mlib_s32 length,
15            mlib_s32 order);
16
17

DESCRIPTION

19       The mlib_SignalLPC2Cepstral_F32() function converts  linear  prediction
20       coefficients to cepstral coefficients.
21
22
23       The cepstral coefficients are the coefficients of the Fourier transform
24       representation of the log magnitude spectrum.
25
26
27       The LPC cepstral coefficients can be derived recursively from  the  LPC
28       coefficients as following.
29
30         c(0) = log(G)
31
32                       m-1  k
33         c(m) = a(m) + SUM --- * c(k) * a(m-k), 1 ≤ m ≤ M
34                       k=1  m
35
36                m-1  k
37         c(m) = SUM --- * c(k) * a(m-k), m > M
38                k=1  m
39
40
41
42       See  Fundamentals  of Speech Recognition by Lawrence Rabiner and Biing-
43       Hwang Juang, Prentice Hall, 1993.
44

PARAMETERS

46       The function takes the following arguments:
47
48       cepst     The cepstral coefficients.
49
50
51       lpc       The linear prediction coefficients.
52
53
54       gain      The gain of the LPC model.
55
56
57       length    The length of the cepstral coefficients.
58
59
60       order     The order of the linear prediction filter.
61
62

RETURN VALUES

64       The function returns MLIB_SUCCESS if successful. Otherwise  it  returns
65       MLIB_FAILURE.
66

ATTRIBUTES

68       See attributes(5) for descriptions of the following attributes:
69
70
71
72
73       ┌─────────────────────────────┬─────────────────────────────┐
74       │      ATTRIBUTE TYPE         │      ATTRIBUTE VALUE        │
75       ├─────────────────────────────┼─────────────────────────────┤
76       │Interface Stability          │Committed                    │
77       ├─────────────────────────────┼─────────────────────────────┤
78       │MT-Level                     │MT-Safe                      │
79       └─────────────────────────────┴─────────────────────────────┘
80

SEE ALSO

82       mlib_SignalLPC2Cepstral_S16(3MLIB),                 mlib_SignalLPC2Cep‐
83       stral_S16_Adp(3MLIB), mlib_SignalLPC2Cepstral_F32(3MLIB), attributes(5)
84
85
86
87SunOS 5.11                        2 Mar 2007mlib_SignalLPC2Cepstral_F32(3MLIB)
Impressum