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来自「speech signal process tools」· 代码 · 共 199 行

LPCSYNT(1-ESPS)                             ENTROPIC RESEARCH LAB



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     lpcsynt - perform pitch-synchronous synthesis  from  FEA_ANA
     files

SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
     llllppppccccssssyyyynnnntttt [ ----xxxx ] [ ----PPPP _p_a_r_a_m__f_i_l_e ] [ ----rrrr _r_a_n_g_e ] [ ----pppp  _r_a_n_g_e  ]
     _i_n_p_u_t__f_e_a _o_u_t_p_u_t__s_d

DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
     This program must be used with files with a format  such  as
     that  created  by _l_p_c_a_n_a(1-ESPS).  Consider use of _l_p__s_y_n(1-
     ESPS). While still supported, _l_p_c_a_n_a(1-ESPS) and _l_p_c_s_y_n_t(1 -
     ESPS) should be considered obsolescent.

     _L_p_c_s_y_n_t  takes  as  input  an  ESPS  FEA_ANA(5 - ESPS)  file
     (_i_n_p_u_t__f_e_a)   containing   analysis   information,  performs
     pitch-synchronous synthesis,  and  outputs  the  synthesized
     speech  to an ESPS FEA_SD(5-ESPS) file _o_u_t_p_u_t__s_d. The output
     file is written in short format.

     If "-" is specified as the input file name,  standard  input
     is  used; if "-" is specified as the output file name, stan-
     dard output is used.

OOOOPPPPTTTTIIIIOOOONNNNSSSS
     The following options are supported:

     ----xxxx    This option is specified for printing  debugging  mes-
          sage in the standard error.

     ----PPPP _p_a_r_a_m__f_i_l_e
          uses the parameter  file  _p_a_r_a_m__f_i_l_e  rather  than  the
          default which is _p_a_r_a_m_s.

     ----pppp _r_a_n_g_e
          Selects a subrange of points to be  synthesized,  where
          the  start  and  end points are defined with respect to
          the original SD file that is the source  of  the  input
          FEA_ANA  file.  The range is specified using the format
          _s_t_a_r_t-_e_n_d or _s_t_a_r_t:_e_n_d or _s_t_a_r_t:+_n_a_n.  Either _s_t_a_r_t  or
          _e_n_d may be omitted, in which case the omitted parameter
          defaults respectively to the start or end of the  input
          FEA_ANA file.

     ----rrrr _r_a_n_g_e
          rrrr is a synonym for pppp.

EEEESSSSPPPPSSSS PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRRSSSS
     The values of parameters obtained from  the  parameter  file
     are printed if the environment variable ESPS_VERBOSE is 3 or
     greater.  The default value is 3.




        Copyright Entropic Research Laboratory, Inc. 1G1        1






LPCSYNT(1-ESPS)                             ENTROPIC RESEARCH LAB



     The following parameters are read from the params file:

     _p_o_s_t__f_i_l_t__n_u_m - _f_l_o_a_t

          A three element vector specifying the  numerator  of  a
          pole-zero  post  processing  filter.   If no values are
          specified in the parameter file, the vector  [1.,  -1.,
          0] is used.


     _p_o_s_t__f_i_l_t__d_e_n - _f_l_o_a_t

          A three element vector specifying the denominator of  a
          pole-zero  post  processing  filter.   If no values are
          specified in the parameter file, the vector [1., -.875,
          0.] is used.

EEEESSSSPPPPSSSS CCCCOOOOMMMMMMMMOOOONNNN
     ESPS Common is not processed.

EEEESSSSPPPPSSSS HHHHEEEEAAAADDDDEEEERRRRSSSS
     The following parameters are read from  the  header  of  the
     input  FEA_ANA  file:  _s_t_a_r_t,  _n_a_n,  _n_o_m_i_n_a_l__f_r_a_m_e__s_i_z_e, _a_n_d
     _s_r_c__s_f.

     _S_y_n_t writes the following header items in the output  FEA_SD
     file:   _s_y_n_t__o_r_d_e_r  (int),  _s_y_n_t__m_e_t_h_o_d (coded), _s_y_n_t__i_n_t_e_r_p
     (coded),  _s_y_n_t__p_w_r  (coded),  _v__e_x_c_i_t__m_e_t_h_o_d  (coded),   and
     _u_v__e_x_c_i_t__m_e_t_h_o_d (coded).

     Also, _s_r_c__s_f is copied from the input  header  and  used  as
     _r_e_c_o_r_d__f_r_e_q in the output FEA_SD file.

     In addition, the generic header item _s_t_a_r_t__t_i_m_e  (type  DOU-
     BLE)  is  written  in  the output file. The value written is
     computed by taking the _s_t_a_r_t__t_i_m_e value from the  header  of
     the  input  file  (or  zero,  if  such a header item doesn't
     exist) and adding to it the offset time (from the  beginning
     of  the original sampled data file) of the first point writ-
     ten by _l_p_c_s_y_n_t (1-ESPS).

CCCCOOOOMMMMMMMMEEEENNNNTTTTSSSS
     The synthesizer implementation is  very  simple.   A  single
     impulse  is  used  as the excitation function for each pitch
     pulse in the case of voiced speech.  A gaussian white  noise
     sequence  is  used as the excitation function when the frame
     is unvoiced.  Linear interpolation is  performed  (for  each
     pulse) on the reflection coefficients, prior to synthesis.

SSSSEEEEEEEE AAAALLLLSSSSOOOO
     lpcana (1-ESPS), ESPS(5-ESPS), FEA_ANA(5-ESPS),
     FEA_SD(5-ESPS).



        Copyright Entropic Research Laboratory, Inc. 2G2        2






LPCSYNT(1-ESPS)                             ENTROPIC RESEARCH LAB



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     None known.

AAAAUUUUTTTTHHHHOOOORRRR
     S. Shankar Narayan. Slight mods  by  John  Shore.  ESPS  3.0
     modification by David Burton

















































        Copyright Entropic Research Laboratory, Inc. 3G3        3