Beagle Board is here
on Nov 18, 2009 in News BeagleBoard My Beagle Board arrived today from Texas Instruments.  I just ordered a power supply and assorted cables for it from Digi-Key.  So it will stilll be a few days before I try to bring up Linux on it.

Short Time Energy in Octave
on Nov 12, 2009 in Speech digital speech processing math tools signal processing Here is a quick prototype of the short time energy function in GNU Octave for a the speech sample “Mister Meryk”. The plot below shows the average magnitude of the phrase using a window size of 320 samples, calculated every 80 samples. A...

Short Time Energy of Speech Signals
on Nov 9, 2009 in Speech digital speech processing signal processing The short time energy measurement of a speech signal can be used to determine voiced vs. unvoiced speech.  Short time energy can also be used to detect the transition from unvoiced to voiced speech and vice versa.  The energy of voiced speech is mu...

BeagleBoard Project Update
on Nov 9, 2009 in News Time Scale Modification BeagleBoard digital speech processing signal processing My project, Speed Reader, has been approved for the BeagleBoard Sponsored Projects Program.  Now I’ll receive a BeagleBoard to prototype a Speech Timescale Modification application for playing audio books.  I’m one step closer to buildi...

Quick note: Publishing equations on the Web
on Oct 31, 2009 in Tools I’m transcribing my paper notes on short-time measurment of the speech signal and needed a way to insert some equations into my blog post.  I found an easy way to do this is to use GNU TeXmacs to enter the equations which can produce postscrip...

Zooming in on speech
on Oct 28, 2009 in Speech acoustic phonetics digital speech processing signal processing The plot from last time doesn’t reveal much about the nature of speech so I’ve been looking at some smaller bits.  First I isolated the first phrase from the sample speech: “Mister Maryk”: Plot of the phrase "Mister Meryk...

Handling Speech Samples with GNU Octave
on Oct 24, 2009 in Speech The first step is to get some sample speech to work with.  I found this clip on the Web.  The first problem is that all of the speech samples that I could find on the Web were encoded in mp3 format.  Speech processing requires linear encoding.  I...

Algorithm Prototyping: GNU Octave
on Oct 19, 2009 in Speech digital speech processing math tools prototyping tools signal processing Signal processing algorithms are usually prototyped and tested using high level math tools such as MATLAB or Mathcad. These tools use a high level language that closely models actual mathematical equations. Tools like these include many built in ma...

Beagle Board Contest Entry
on Oct 10, 2009 in News The Beagle Board is a low cost single board computer that is ideally suited to prototyping multimedia embedded systems applications.  It is based on the Texas Instruments OMAP3530 application processor.  The TI OMAP 3530 integrates an ARM Cortex RI...

Beagle Board Sponsered Projects Entry
on Oct 10, 2009 in News The Beagle Board is a low cost single board computer that is ideally suited to prototyping multimedia embedded systems applications.  It is based on the Texas Instruments OMAP3530 application processor.  The TI OMAP 3530 integrates an ARM Cortex RI...