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From: Charulatha Kalluri on 8 Jul 2010 16:04 Hi Soukaina, fdesign.parameq captures the specification of a parametric equalizer filter. Once you specify your design parameters - such as filter order, center frequency, bandwidth, and reference gain - you can use the command 'design' to design a filter that matches these specifications. Here's a demo that illustrates parametric equalizer filter design: http://www.mathworks.com/products/filterdesign/demos.html?file=/products/demos/shipping/filterdesign/parameqdemo.html As for 'signalblks.MultimediaFileReader', this is a System object that can read data from a multimedia file, in groups of samples, or frames. You can use object properties to specify which file to read from, how many samples are contained in a frame, and several other properties. In the vuvuzela demo, we read from a WAV file 'vuvuzela.wav' and the frame size was set to 1024 samples/frame. Detailed information on this object can be found here: http://www.mathworks.com/access/helpdesk/help/toolbox/dspblks/ref/signalblks.multimediafilereaderclass.html Hope this helps, Charu "Soukaina BENAMAR" <soukainabenamar5(a)hotmail.com> wrote in message <i155ge$dbm$1(a)fred.mathworks.com>... > hello > I don't understand the role of functions such as : fdesign.parameq, also signalblks.MultimediaFileReade!!! > > "Steven Lord" <slord(a)mathworks.com> wrote in message <i154d7$rd$1(a)fred.mathworks.com>... > > > > "Soukaina BENAMAR" <soukainabenamar5(a)hotmail.com> wrote in message > > news:i14qgr$dju$1(a)fred.mathworks.com... > > > Bonjour, Pourriez vous m'expliquer ce Programme ( sur tous les commandes) > > > Merci d'avance > > > > *snip* > > > > First, please do not copy a file from the File Exchange into your posting. > > Just include a link to the file. > > > > http://www.mathworks.com/matlabcentral/fileexchange/28068-vuvuzela-filtering-with-parametric-equalizers-using-system-objects > > > > or perhaps: > > > > http://www.mathworks.com/matlabcentral/fileexchange/27912-vuvuzela-sound-denoising-algorithm > > > > Second, the comments in the code explain in general what each section of the > > code does; if you still need further help understanding a specific section, > > take a look at the help text and/or documentation for the function or > > functions you don't understand. For example, to learn what the SIN function > > does, you would execute one or both of the following commands at the MATLAB > > prompt: > > > > help sin > > > > doc sin > > > > After reading through the comments in the code, the help text, and the > > documentation if you have a SPECIFIC question about what the code is doing, > > then go ahead and ask that SPECIFIC question here. > > > > -- > > Steve Lord > > slord(a)mathworks.com > > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ > > To contact Technical Support use the Contact Us link on > > http://www.mathworks.com > >
From: Soukaina BENAMAR on 9 Jul 2010 03:52 Hello Charulatha, thank you for your hep... i still have some problems when i try to evaluate the selection in matlab this message appear: ??? Undefined variable 'signalblks' or class 'signalblks.MultimediaFileReader'. ^_^
From: Charulatha Kalluri on 9 Jul 2010 11:20
Hi, It appears that you do not have the Signal Processing Blockset installed. This product is required in order to use System objects. Hth, Charu "Soukaina BENAMAR" <soukainabenamar5(a)hotmail.com> wrote in message <i16kf5$8n8$1(a)fred.mathworks.com>... > Hello Charulatha, > > thank you for your hep... i still have some problems when i try to evaluate the selection in matlab this message appear: > ??? Undefined variable 'signalblks' or class 'signalblks.MultimediaFileReader'. > ^_^ |