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<title>Synthesis of the NTF of Delta Sigma modulators (pydsm.NTFdesign) — PyDSM 0.14.0.0 documentation</title>
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<span class="target" id="module-pydsm.NTFdesign"></span><div class="section" id="synthesis-of-the-ntf-of-delta-sigma-modulators-pydsm-ntfdesign">
<h1>Synthesis of the NTF of Delta Sigma modulators (<a class="reference internal" href="#module-pydsm.NTFdesign" title="pydsm.NTFdesign"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign</span></code></a>)<a class="headerlink" href="#synthesis-of-the-ntf-of-delta-sigma-modulators-pydsm-ntfdesign" title="Permalink to this headline">¶</a></h1>
<p>This module provides some strategies for the design of the Noise
Transfer Function of ΔΣ modulators. There are both functions that are
specific to PyDSM and entry points to functions in the delsig module
of PyDSM (<a class="reference internal" href="pydsm.delsig.html#module-pydsm.delsig" title="pydsm.delsig"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.delsig</span></code></a>).</p>
<div class="section" id="key-functions">
<h2>Key functions<a class="headerlink" href="#key-functions" title="Permalink to this headline">¶</a></h2>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_schreier">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_schreier</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_schreier" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.delsig.ntf_schreier.html#pydsm.NTFdesign.delsig.ntf_schreier" title="pydsm.NTFdesign.delsig.ntf_schreier"><code class="xref py py-func docutils literal notranslate"><span class="pre">delsig.ntf_schreier()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_chebyshev">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_chebyshev</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_chebyshev" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.delsig.ntf_chebyshev.html#pydsm.NTFdesign.delsig.ntf_chebyshev" title="pydsm.NTFdesign.delsig.ntf_chebyshev"><code class="xref py py-func docutils literal notranslate"><span class="pre">delsig.ntf_chebyshev()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_clans">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_clans</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_clans" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.delsig.ntf_clans.html#pydsm.NTFdesign.delsig.ntf_clans" title="pydsm.NTFdesign.delsig.ntf_clans"><code class="xref py py-func docutils literal notranslate"><span class="pre">delsig.ntf_clans()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_fir_weighting">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_fir_weighting</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_fir_weighting" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.weighting.ntf_fir_weighting.html#pydsm.NTFdesign.weighting.ntf_fir_weighting" title="pydsm.NTFdesign.weighting.ntf_fir_weighting"><code class="xref py py-func docutils literal notranslate"><span class="pre">weighting.ntf_fir_weighting()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_hybrid_weighting">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_hybrid_weighting</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_hybrid_weighting" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.weighting.ntf_hybrid_weighting.html#pydsm.NTFdesign.weighting.ntf_hybrid_weighting" title="pydsm.NTFdesign.weighting.ntf_hybrid_weighting"><code class="xref py py-func docutils literal notranslate"><span class="pre">weighting.ntf_hybrid_weighting()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_fir_minmax">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_fir_minmax</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_fir_minmax" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.minmax.ntf_fir_minmax.html#pydsm.NTFdesign.minmax.ntf_fir_minmax" title="pydsm.NTFdesign.minmax.ntf_fir_minmax"><code class="xref py py-func docutils literal notranslate"><span class="pre">minmax.ntf_fir_minmax()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_dunn">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_dunn</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_dunn" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.psychoacoustic.ntf_dunn.html#pydsm.NTFdesign.psychoacoustic.ntf_dunn" title="pydsm.NTFdesign.psychoacoustic.ntf_dunn"><code class="xref py py-func docutils literal notranslate"><span class="pre">psychoacoustic.ntf_dunn()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.ntf_fir_audio_weighting">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_fir_audio_weighting</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.ntf_fir_audio_weighting" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.psychoacoustic.ntf_fir_audio_weighting.html#pydsm.NTFdesign.psychoacoustic.ntf_fir_audio_weighting" title="pydsm.NTFdesign.psychoacoustic.ntf_fir_audio_weighting"><code class="xref py py-func docutils literal notranslate"><span class="pre">psychoacoustic.ntf_fir_audio_weighting()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.mult_weightings">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">mult_weightings</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.mult_weightings" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.weighting.mult_weightings.html#pydsm.NTFdesign.weighting.mult_weightings" title="pydsm.NTFdesign.weighting.mult_weightings"><code class="xref py py-func docutils literal notranslate"><span class="pre">weighting.mult_weightings()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt id="pydsm.NTFdesign.quantization_noise_gain">
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">quantization_noise_gain</code><span class="sig-paren">(</span><span class="sig-paren">)</span><a class="headerlink" href="#pydsm.NTFdesign.quantization_noise_gain" title="Permalink to this definition">¶</a></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.merit_factors.quantization_noise_gain.html#pydsm.NTFdesign.merit_factors.quantization_noise_gain" title="pydsm.NTFdesign.merit_factors.quantization_noise_gain"><code class="xref py py-func docutils literal notranslate"><span class="pre">merit_factors.quantization_noise_gain()</span></code></a></p>
</dd></dl>
<dl class="function">
<dt>
<code class="sig-prename descclassname">pydsm.NTFdesign.</code><code class="sig-name descname">ntf_fir_minmax</code><span class="sig-paren">(</span><span class="sig-paren">)</span></dt>
<dd><p>shorthand for <a class="reference internal" href="generated/pydsm.NTFdesign.minmax.ntf_fir_minmax.html#pydsm.NTFdesign.minmax.ntf_fir_minmax" title="pydsm.NTFdesign.minmax.ntf_fir_minmax"><code class="xref py py-func docutils literal notranslate"><span class="pre">minmax.ntf_fir_minmax()</span></code></a></p>
</dd></dl>
</div>
<div class="section" id="submodules">
<h2>Submodules<a class="headerlink" href="#submodules" title="Permalink to this headline">¶</a></h2>
<dl class="simple">
<dt><a class="reference internal" href="pydsm.NTFdesign.delsig.html#module-pydsm.NTFdesign.delsig" title="pydsm.NTFdesign.delsig"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.delsig</span></code></a></dt><dd><p>NTF synthesis functions equivalent to those in <a class="reference internal" href="pydsm.delsig.html#module-pydsm.delsig" title="pydsm.delsig"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.delsig</span></code></a>.</p>
</dd>
<dt><a class="reference internal" href="pydsm.NTFdesign.weighting.html#module-pydsm.NTFdesign.weighting" title="pydsm.NTFdesign.weighting"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.weighting</span></code></a></dt><dd><p>NTF synthesis techniques that take as their input either a weighting
function (indicating the cost of quantization noise power versus frequency)
or a specification of the filter in charge of removing the quantization
noise.</p>
</dd>
<dt><a class="reference internal" href="pydsm.NTFdesign.minmax.html#module-pydsm.NTFdesign.minmax" title="pydsm.NTFdesign.minmax"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.minmax</span></code></a></dt><dd><p>NTF synthesis techniques based on a minmax approach.</p>
</dd>
<dt><a class="reference internal" href="pydsm.NTFdesign.psychoacoustic.html#module-pydsm.NTFdesign.psychoacoustic" title="pydsm.NTFdesign.psychoacoustic"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.psychoacoustic</span></code></a></dt><dd><p>NTF synthesis techniques for audio modulators that result in a noise shaping
that take into account psychoacoustics.</p>
</dd>
<dt><a class="reference internal" href="pydsm.NTFdesign.merit_factors.html#module-pydsm.NTFdesign.merit_factors" title="pydsm.NTFdesign.merit_factors"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.merit_factors</span></code></a></dt><dd><p>Functions for determining merit factors about NTFs.</p>
</dd>
<dt><a class="reference internal" href="pydsm.NTFdesign.helpers.html#module-pydsm.NTFdesign.helpers" title="pydsm.NTFdesign.helpers"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.helpers</span></code></a></dt><dd><p>Helper functions</p>
</dd>
</dl>
</div>
<div class="section" id="legacy-submodule">
<h2>Legacy submodule<a class="headerlink" href="#legacy-submodule" title="Permalink to this headline">¶</a></h2>
<dl class="simple">
<dt><a class="reference internal" href="pydsm.NTFdesign.legacy.html#module-pydsm.NTFdesign.legacy" title="pydsm.NTFdesign.legacy"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.legacy</span></code></a></dt><dd><p>Functions that are now superseded but that are worth keeping around for
reproducing published results</p>
</dd>
</dl>
</div>
<div class="section" id="deprecated-submodules">
<h2>Deprecated submodules<a class="headerlink" href="#deprecated-submodules" title="Permalink to this headline">¶</a></h2>
<dl class="simple">
<dt><a class="reference internal" href="pydsm.NTFdesign.filter_based.html#module-pydsm.NTFdesign.filter_based" title="pydsm.NTFdesign.filter_based"><code class="xref py py-mod docutils literal notranslate"><span class="pre">pydsm.NTFdesign.filter_based</span></code></a></dt><dd><p>Alternate entry points for some functions.</p>
</dd>
</dl>
</div>
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<h3>Table of Contents</h3>
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<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 current"><a class="reference internal" href="reference.html">Reference guide</a><ul class="current">
<li class="toctree-l2 current"><a class="reference internal" href="reference.html#main-modules">Main modules</a></li>
<li class="toctree-l2"><a class="reference internal" href="reference.html#utility-modules">Utility modules</a></li>
<li class="toctree-l2"><a class="reference internal" href="reference.html#error-handling">Error handling</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="replicate-results.html">How to replicate the results in some recent scientific papers</a></li>
<li class="toctree-l1"><a class="reference internal" href="license.html">License</a></li>
<li class="toctree-l1"><a class="reference internal" href="included_code.html">Code included in PyDSM</a></li>
<li class="toctree-l1"><a class="reference internal" href="more-references.html">References not provided inline in this manual</a></li>
<li class="toctree-l1"><a class="reference internal" href="changelog.html">Changelog</a></li>
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