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<p>not simply stored and reconstructed.  But the fidelity of a theoretical reconstruction (via the <a href="page.php?w=Whittaker-Shannon_interpolation_formula">Whittaker-Shannon interpolation formula</a>) is a customary measure of the effectiveness of sampling.</p>

<p><big> Historical usage </big></p>
<p>Historically the term aliasing evolved from radio engineering because of the action of <a href="page.php?w=superheterodyne_receiver">superheterodyne receiver</a>s. When the receiver shifts multiple signals down to lower frequencies, from <a href="page.php?w=Radio_frequency">RF</a></p><p>
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