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<!DOCTYPE html>
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<title>TCAS-II 2013 paper by Callegari and Bizzarri — PyDSM 0.14.0.0 documentation</title>
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<div class="section" id="tcas-ii-2013-paper-by-callegari-and-bizzarri">
<h1>TCAS-II 2013 paper by Callegari and Bizzarri<a class="headerlink" href="#tcas-ii-2013-paper-by-callegari-and-bizzarri" title="Permalink to this headline">¶</a></h1>
<p>This section illustrates how to replicate the results presented in the
paper <a class="reference internal" href="#cal13b" id="id1"><span>[Cal13b]</span></a></p>
<dl class="citation">
<dt class="label" id="cal13b"><span class="brackets"><a class="fn-backref" href="#id1">Cal13b</a></span></dt>
<dd><p>Sergio Callegari, Federico Bizzarri <em>“Noise Weighting in the
Design of ΔΣ Modulators (with a Psychoacoustic Coder as an
Example),”</em> IEEE Transactions on Circuits and Systems - Part II:
Express Briefs, Vol. 60, N. 11, pp. 756-760. Nov. 2013. DOI:
<a class="reference external" href="http://dx.doi.org/10.1109/TCSII.2013.2281892">10.1109/TCSII.2013.2281892</a>. Pre-print
available on <a class="reference external" href="http://arxiv.org/abs/1309.6151">arXiv</a>.</p>
</dd>
</dl>
<p>To this aim, some sample code is provided in the directory
<code class="docutils literal notranslate"><span class="pre">Examples/TCAS2-2013</span></code>.</p>
<p>The research paper provides 4 examples, in Sections IV-a to V-e.</p>
<div class="section" id="example-in-section-iv-a">
<h2>Example in section IV-a<a class="headerlink" href="#example-in-section-iv-a" title="Permalink to this headline">¶</a></h2>
<p>This example refers to the design of a Digital ΔΣ modulator for low
pass signals with a mere specification of the signal bandwith (which
is specified as a fraction of the modulator sample frequency via the
oversampling ratio).</p>
<p>The corresponding code is provided in the file <code class="docutils literal notranslate"><span class="pre">demo_lp_brickwall.py</span></code>. Once
PyDSM and all its pre-requisites are installed, this can be started
directly by opening a shell (command prompt) and typing:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">demo_lp_brickwall</span><span class="o">.</span><span class="n">py</span>
</pre></div>
</div>
<p>Alternatively, the script can be opened in Spyder and launched from
there.</p>
<p>The code runs, showing some intermediate output from the
optimizer. Then it provides the graphical output that is delivered in
Figure 2 in the TCAS-II paper.</p>
<p>The proposed example code is not particularly elegant, but should be
rather easy to read, also thanks to the many comments.</p>
</div>
<div class="section" id="example-in-section-iv-b">
<h2>Example in section IV-b<a class="headerlink" href="#example-in-section-iv-b" title="Permalink to this headline">¶</a></h2>
<p>This example refers to the design of a multiband Digital ΔΣ modulator.</p>
<p>The corresponding code is provided in the file
<code class="docutils literal notranslate"><span class="pre">demo_multiband_brickwall.py</span></code>. Once PyDSM and all its pre-requisites
are installed, this can be started directly by opening a shell
(command prompt) and typing:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">demo_multiband_brickwall</span><span class="o">.</span><span class="n">py</span>
</pre></div>
</div>
<p>Alternatively, the script can be opened in Spyder and launched from
there.</p>
<p>The code runs, showing some intermediate output from the
optimizer. Then it provides the graphical output that is delivered in
Figure 3 in the TCAS-II paper.</p>
<p>The proposed example code is not particularly
elegant, but should be rather easy to read, also thanks to the many
comments.</p>
</div>
<div class="section" id="example-in-section-iv-c">
<h2>Example in section IV-c<a class="headerlink" href="#example-in-section-iv-c" title="Permalink to this headline">¶</a></h2>
<p>This example refers to the design of a Digital ΔΣ modulator that is
followed by a non ideal filter in charge of removing the quantization
noise.</p>
<p>The corresponding code is provided in the file
<code class="docutils literal notranslate"><span class="pre">demo_lp_filter.py</span></code>. Once PyDSM and all its pre-requisites are
installed, this can be started directly by opening a shell (command
prompt) and typing:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">demo_lp_filter</span><span class="o">.</span><span class="n">py</span>
</pre></div>
</div>
<p>Alternatively, the script can be opened in Spyder and launched from
there.</p>
<p>The code runs, showing some intermediate output from the
optimizer. Then it provides the graphical output that is delivered in
Figure 5 in the TCAS-II paper.</p>
<p>The proposed example code is not particularly elegant, but should be
rather easy to read, also thanks to the many comments.</p>
</div>
<div class="section" id="example-in-section-iv-d">
<h2>Example in section IV-d<a class="headerlink" href="#example-in-section-iv-d" title="Permalink to this headline">¶</a></h2>
<p>This example refers to the design of a Digital ΔΣ modulator for low-pass
signal that is capable of delivering a reduced quantization noise close to
dc.</p>
<p>The corresponding code is provided in the file
<code class="docutils literal notranslate"><span class="pre">demo_lp_low_dc_noise.py</span></code>. Once PyDSM and all its pre-requisites are
installed, this can be started directly by opening a shell (command
prompt) and typing:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">demo_lp_low_dc_noise</span><span class="o">.</span><span class="n">py</span>
</pre></div>
</div>
<p>Alternatively, the script can be opened in Spyder and launched from
there.</p>
<p>The code runs, showing some intermediate output from the
optimizer. Then it provides the graphical output that is delivered in
Figure 6 in the TCAS-II paper.</p>
<p>The proposed example code is not particularly elegant, but should be
rather easy to read, also thanks to the many comments.</p>
</div>
<div class="section" id="example-in-section-iv-e">
<h2>Example in section IV-e<a class="headerlink" href="#example-in-section-iv-e" title="Permalink to this headline">¶</a></h2>
<p>This example refers to the design of a Digital ΔΣ modulator for audio
signals capable of shaping the in-band quantization noise according to
a psychoacoustic weighting function, so that it is minimally audible.</p>
<p>The corresponding code is provided in the file
<code class="docutils literal notranslate"><span class="pre">demo_psychoacoustic.py</span></code>. Once PyDSM and all its pre-requisites are
installed, this can be started directly by opening a shell (command
prompt) and typing:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python</span> <span class="n">demo_psychoacoustic</span><span class="o">.</span><span class="n">py</span>
</pre></div>
</div>
<p>Alternatively, the script can be opened in Spyder and launched from
there.</p>
<p>The code runs, showing some intermediate output from the
optimizer. Then it provides the graphical output that is delivered in
Figure 7 in the TCAS-II paper.</p>
<p>The proposed example code is not particularly elegant, but should be
rather easy to read, also thanks to the many comments.</p>
</div>
</div>
</div>
</div>
</div>
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<h3>Table of Contents</h3>
<ul class="current">
<li class="toctree-l1"><a class="reference internal" href="intro.html">Introduction</a></li>
<li class="toctree-l1"><a class="reference internal" href="getting-started.html">Getting Started</a></li>
<li class="toctree-l1"><a class="reference internal" href="reference.html">Reference guide</a></li>
<li class="toctree-l1 current"><a class="reference internal" href="replicate-results.html">How to replicate the results in some recent scientific papers</a><ul class="current">
<li class="toctree-l2"><a class="reference internal" href="replicate-icecs-2013.html">ICECS 2013 paper by Callegari</a></li>
<li class="toctree-l2 current"><a class="current reference internal" href="#">TCAS-II 2013 paper by Callegari and Bizzarri</a></li>
<li class="toctree-l2"><a class="reference internal" href="replicate-tcas1-2013.html">TCAS-I 2013 paper by Callegari and Bizzarri</a></li>
<li class="toctree-l2"><a class="reference internal" href="replicate-icecs-2012.html">ICECS 2012 paper by Callegari and Bizzarri</a></li>
</ul>
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<li class="toctree-l1"><a class="reference internal" href="more-references.html">References not provided inline in this manual</a></li>
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