[hts-users:01056] Re: Excitation Generation

[Keiichi Tokuda <tokuda@xxxxxxxxxxxx>]

From: Tamer Fares <tamerfares@xxxxxxxxxxx>
Subject: [hts-users:01054] Re: Excitation Generation
Date: Mon, 10 Dec 2007 07:04:05 +0000
Message-ID: <BAY111-W28190999DEAEB565234F57C36B0@xxxxxxx>

> in the HTS After the speech parameter generation of the log(f0), it is used to be the input to the Excitation generation b4 to be input to the MLSA
>  
> I'am wondering what is the role of the excitation generation?
> is the log(f0) is transformed to another form b4 to be input to the MLSA?

pulse train and white noise for voiced and unvoiced segments,
respectively.

This is a very basic question about speech signal modeling.  You
should refer to a text book.  Almost all text books about speech
signal processing explain this point.  For exmple, see Figure
6.15 in the following text book:

  Spoken Language Processing
  - A Guide to Theory, Algorithm, and System Development
  X. Huang, A. Acero, H.-W. Hon
  Prentice Hall, 2001
  ISBN: 0-13-022616-5

I do recommend you to read one of speech signal processing text
books.  It is the shorter way than asking many basic questions
on the mailing list.

regards,
Keiichi Tokuda
tokuda@xxxxxxxxxxxx
http://www.sp.nitech.ac.jp/~tokuda/