hi over there, What I know about it is that the energy is the fft of the filtered signal power 2 and you might divide this by the number of samples. But if you have the coder I guess you have a decoder ???? or you can find one maybe on sourceforge.org hope it helps 17/01/03 08:43:52, <> a rit: > > > "Yidan Zhou <>" > <>, > > De: <> > Date: Thu, 16 Jan 2003 23:43:52 -0800 (PST) > Sujet:Re: [speechcoding] questions about G.723.1 and G.729 > > Hi all > > As we know in the channel vocoder each segment of input speech is analyzed > using a bank of band pass filters called the analysis filters > The energy at the output of the each filter is estimate at fixed intervals > and transmitted to the receiver. > > what is that energy and how to quantify that ?? > > please if anybody know about basic fundametal of this please reply soon > > with regards > > "Yidan Zhou <>" <> > wrote:Hello all, > After I went through the standard document of G.723.1 and G.729, > there are several technical terms I don't understand. > 1. In G.723.1, what is the combinatorial coding for transmitting > the pulse location? > 2. In G.729, Why a low-pass filter can act as a tilt compensation > filter? > 3. In G.729, a bandwidth expansion is applied before the levinson > durbin. It is said that expansion is used for white noise > correction. Then what's the meaning of white-noise correction? > Anyone knows the answers to these question, please do me a favor. > Thanks in advance! > > Best regards, > > Yidan Zhou > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of > this message will receive your answer. You need to do a "reply all" if you > want your answer to be distributed to the entire group. > > _____________________________________ > About this discussion group: > > To Join: > > To Post: > > To Leave: > > Archives: http://www.yahoogroups.com/group/speechcoding > > Other DSP-Related Groups: http://www.dsprelated.com > HGTV Dream Home Giveaway > _____________________________________ > Note: If you do a simple "reply" with your email client, only the author of > this message will receive your answer. You need to do a "reply all" if you > want your answer to be distributed to the entire group. > > _____________________________________ > About this discussion group: > > To Join: > > To Post: > > To Leave: > > Archives: http://www.yahoogroups.com/group/speechcoding > > Other DSP-Related Groups: http://www.dsprelated.com > |