Manual Pages for UNIX Operating System command usage for man mlib_SignalLPC2Cepstral_F32

mediaLib Library Functions     mlib_SignalLPC2Cepstral_F32(3MLIB)



NAME
     mlib_SignalLPC2Cepstral_F32  -  convert  linear   prediction
     coefficients to cepstral coefficients

SYNOPSIS
     cc [ flag... ] file... -lmlib [ library... ]
     #include 

     mlib_status mlib_SignalLPC2Cepstral_F32(mlib_f32 *cepst,
          const mlib_f32 *lpc, mlib_f32 gain, mlib_s32 length,
          mlib_s32 order);


DESCRIPTION
     The mlib_SignalLPC2Cepstral_F32() function  converts  linear
     prediction coefficients to cepstral coefficients.


     The  cepstral  coefficients  are  the  coefficients  of  the
     Fourier  transform representation of the log magnitude spec-
     trum.


     The LPC cepstral coefficients  can  be  derived  recursively
     from the LPC coefficients as following.

       c(0) = log(G)

                     m-1  k
       c(m) = a(m) + SUM --- * c(k) * a(m-k), 1 < m < M
                     k=1  m

              m-1  k
       c(m) = SUM --- * c(k) * a(m-k), m > M
              k=1  m



     See Fundamentals of Speech Recognition by  Lawrence  Rabiner
     and Biing-Hwang Juang, Prentice Hall, 1993.

PARAMETERS
     The function takes the following arguments:

     cepst     The cepstral coefficients.


     lpc       The linear prediction coefficients.


     gain      The gain of the LPC model.




SunOS 5.11           Last change: 2 Mar 2007                    1






mediaLib Library Functions     mlib_SignalLPC2Cepstral_F32(3MLIB)



     length    The length of the cepstral coefficients.


     order     The order of the linear prediction filter.


RETURN VALUES
     The function returns MLIB_SUCCESS if  successful.  Otherwise
     it returns MLIB_FAILURE.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     mlib_SignalLPC2Cepstral_S16(3MLIB),
     mlib_SignalLPC2Cepstral_S16_Adp(3MLIB),
     mlib_SignalLPC2Cepstral_F32(3MLIB), attributes(5)


























SunOS 5.11           Last change: 2 Mar 2007                    2