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<!DOCTYPE html>
<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Demo</title>
</head>
<body>
<h2>
<center>Enhancing Monotonicity for Robust Autoregressive Transformer TTS<center>
</center></center></h2>
<h3>
<center>Xiangyu Liang, Zhiyong Wu, Runnan Li, Yanqing Liu, Sheng Zhao, Helen Meng</center>
</h3>
<h3>
<center>Audio demos</center>
</h3>
<h3>
<p>Abstract<p>
</h3>
<p>The Text-to-Speech (TTS) field has benefited a lot from the development of sequence-to-sequence modeling methods in recent years. An up-to-date Transformer based TTS method manifests good synthesis performance with superiority in parallelism compared to the recurrent neural network (RNN) family methods by avoiding the recurrent process. However, naive multi-head attention mechanism is hard to handle cases that contain identical elements regardless their positions in the sequence. Different from neural machine translation (NMT) tasks where Transformer was first applied to, strong monotonic constraint of alignment between encoder and decoder exists in the TTS task. To explicitly bring in this information, we developed two methods to enhance monotonicity for encoder-decoder part multihead attention, which are 1) GMM attention guided multi-head attention and 2) Stepwise monotonic attention tuned multi-head attention. Experiments show that both methods could vastly reduce bad cases caused by the lack of monotonicity in original Transformer TTS. The later one could offer a more accurate alignment within only several tune epochs. We believe our method could be applied to other fields that possess monotonic property but suffer from defective alignment problems by adopting the Transformer architecture.</p>
<h3>Robustness: LJSpeech (Griffin Lim)</h3>
<table style="width:100%">
<tbody><tr>
<th></th>
<th>Ground truth</th>
<th>Baseline</th>
<th>GMM guided</th>
<th>SMA tuned(soft)</th>
<th>SMA tuned(hard)</th>
</tr>
<p>0.LJ049-0027: Presidents have made it clear, however, that they did not favor this or any other arrangement which interferes with the <font color="#FF0000">privacy of the</font> President and his guests.</p>
<tr>
<th>Audios</th>
<th>
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</th>
</tr>
</tbody></table>
<table style="width:100%">
<tbody>
<p>1.LJ049-0177: and Robert I. Bouck, who was in charge of the Protective Research Section of the Secret Service, <font color="#FF0000">believed that the accumulation</font> of the facts known to the FBI</p>
<tr>
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</th>
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</tbody></table>
<table style="width:100%">
<tbody>
<tr>
<p>2.LJ050-0061: (b) who have made threats of bodily harm against officials or employees of Federal, state or local government<font color="#FF0000"> or officials of a foreign</font> government,</p>
<th>Audios</th>
<th>
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</tbody></table>
<table style="width:100%">
<tbody>
<tr>
<p>3.LJ050-0263: it will continue to rely in many respects upon the greater <font color="#FF0000">resources</font> of the Office <font color="#FF0000">of Science</font> and Technology and other agencies.</p>
<th>Audios</th>
<th>
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</th>
</tr>
</tbody></table>
<h3>Robustness: Out of domain (WaveNet)</h3>
<table style="width:100%">
<tbody><tr>
<th></th>
<th>Baseline</th>
<th>GMM guided</th>
<th>SMA tuned(soft)</th>
<th>SMA tuned(hard)</th>
</tr>
<tr>
<p>and which thus helps to restrain the actions of individuals within due bounds. Justice in <font color="#FF0000">this sense of</font> the term is of critical importance,</p>
<th>Audios</th>
<th>
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</tbody></table>
<table style="width:100%">
<tr>
<p>Such cases, however, are not very frequent; and in every part of Europe twenty workmen serve under <font color="#FF0000">a master for one</font> that is <font color="#FF0000">independent</font>, </p>
<th>Audios</th>
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</tbody></table>
<table style="width:100%">
<tr>
<p>and argued that it could make companies less competitive—despite the disclosure obligations that had been <font color="#FF0000">enacted in</font> Europe and Canada.</p>
<th>Audios</th>
<th>
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</tr>
</tbody></table>
</table>
<h3>Naturalness: Out of domain (WaveNet)</h3>
<table style="width:100%">
<tbody><tr>
<th></th>
<th>Baseline</th>
<th>GMM guided</th>
<th>SMA tuned(soft)</th>
<th>SMA tuned(hard)</th>
</tr>
<tr>
<p>However, melting ice is now thought to be the main reason for rising sea levels. Most glaciers in temperate regions of the world are retreating. </p>
<th>Audios</th>
<th>
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</tbody></table>
<table style="width:100%">
<tr>
<p>And even before that, the Romans ruled, which in their turn came from all over the intercontinental empire.</p>
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</tbody></table>
</table>
<table style="width:100%">
<tr>
<p>Gine Wang-Reese, vice president of political and public affairs at Equinor, wrote to the SEC. </p>
<th>Audios</th>
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<table style="width:100%">
<tr>
<p>The chief executive of the company’s Washington, D.C.-based lobbying arm, Francois Badoual, </p>
<th>Audios</th>
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</tbody></table>
</table>
</body></html>