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<!-- www.ecodis.de/exhale/release.htm - created by Christian R. Helmrich - Copyright (c) 2018-2020 Christian R. Helmrich, project ecodis. All rights reserved. -->
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<h1><br><span class="pink">exhale</span> - <span class="pink">e</span>codis e<span class="pink">x</span>tended <span class="pink">h</span>igh-efficiency <span class="pink">a</span>nd <span class="pink">l</span>ow-complexity <span class="pink">e</span>ncoder<br><span class="gray"><sup><br>Software Release Notes, Version History, Known Issues, Upcoming Feature Roadmap</sup></span><br><br></h1>
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<h3>&nbsp; &nbsp;The version of this distribution of the &laquo;exhale&raquo; software release is <b>1.0.3</b> (official pub&shy;lic minor release) from April 2020. Please check <a href="http://www.ecodis.de">www.ecodis.de</a> regularly for new versions of this software. A summary of each version up to this release, a list of known issues with this release, and a roadmap of additional functionality are provided below.</h3>
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<h3><br><b>Chronological Version History</b></h3>
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<h3>&nbsp; &nbsp;Version <b>1.0.3 <span class="gray">&nbsp;Apr. 2020, this release</span></b></h3>
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<li><h3>extended basic joint-stereo coding functionality for mid/high rates, minor bugfixes</h3></li>
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<h3>&nbsp; &nbsp;Version <b>1.0.2 <span class="gray">&nbsp;Mar. 2020</span></b></h3>
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<ul>
<li><h3>added basic low/mid-rate joint-stereo coding functionality, bugfixes, and speedups</h3></li>
<li><h3>exhaleApp: support for input sampling rates of up to 48000 Hz with CVBR mode 2</h3></li>
<li><h3>exhaleLib: frame adaptive joint-stereo preprocessing and coding (CVBR mode &lt;5)</h3></li>
<li><h3>exhaleLib: accelerated R/D opt. coding, stability and quality fixes (issues 2 and 3)</h3></li>
</ul>
<h3>&nbsp; &nbsp;Version <b>1.0.1 <span class="gray">&nbsp;Feb. 2020</span></b></h3>
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<ul>
<li><h3>improved low-bitrate coding efficiency and support for MPEG-D loudness metadata</h3></li>
<li><h3>exhaleApp: increased MP4 file versatility (issue 1) and calculation of loudness info</h3></li>
<li><h3>exhaleLib: backward compatible API extension to support writing of loudness info</h3></li>
<li><h3>exhaleLib: extended R/D optimized coding, improved short-transform quantization</h3></li>
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<h3>&nbsp; &nbsp;Version <b>1.0.0 <span class="gray">&nbsp;Jan. 2020</span></b></h3>
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<li><h3>compilation fixes and executable printout changes for Linux and MacOS&trade; platform</h3></li>
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<li><h3>exhaleApp: fixed reading of WAVE files including metadata after the &laquo;data&raquo; chunk</h3></li>
<li><h3>exhaleLib: some tuning of transform and noise level detection for transient signals</h3></li>
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<li><h3>exhaleLib: support for export as DLL on Microsoft Windows&trade; (not tested, though)</h3></li>
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<h3>&nbsp; &nbsp;Version <b>1.0RC <span class="gray">Dec. 2019</span></b></h3>
<ul>
<li><h3>initial release for testing with only basic channel-independent coding functionality</h3></li>
<li><h3>only support for Microsoft Windows&trade; (32-bit and 64-bit) platform provided so far.</h3></li>
</ul>
<h3><br><b>Known Issues with This Release</b></h3>
<h3>&nbsp; &nbsp;If you notice an issue with this release <b>not</b> mentioned below, please contact ecodis or a contributor with the details (configuration, input file) needed to reproduce the issue.</h3>
<ul>
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<li><h3>exhaleLib: Coding of stereo or multichannel input occasionally leads to suboptimal audio quality because the joint-channel coding functionality provided by ISO/IEC <a href="https://www.iso.org/standard/76385.html">23003-3</a> has not been fully implemented. See the functionality roadmap below.</h3></li>
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<li><h3>exhaleApp: Only basic WAVE input file reading functionality has been implemen&shy;ted. Specifically, 8-bit WAVE input is assumed to contain an even number of audio samples, and the Broadcast and Extensible WAVE file formats are not supported.</h3></li>
</ul>
<h3><br><b>Roadmap of Upcoming Features</b></h3>
<h3>&nbsp; &nbsp;If you are in need of an additional library or application feature <b>not</b> mentioned below, please contact ecodis or a contributor with a request, and we will see what we can do.</h3>
<ul>
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<li><h3>support for coding with a core coder frame length of 768 samples, no version plan</h3></li>
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<li><h3>exhaleLib: completed integration of predictive joint-channel coding, version 1.0.4</h3></li>
<li><h3>exhaleLib: quality tuning and bug fixing for low-rate stereo coding, version 1.0.4</h3></li>
<li><h3>exhaleLib: finalization of support for 3.0 &#x2013; 5.1 multichannel coding, version 1.0.5</h3></li>
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<li><h3>exhaleLib: speed-ups and further quality tuning for critical signals, version 1.0.5.</h3></li>
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<h3><br></h3>
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<h4><span class="gray">Written by C. R. Helmrich for exhale 1.0.3, Apr. 2020. Available at www.ecodis.de/exhale/release.htm.</span><br><br></h4>
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<p><br>&nbsp; &nbsp;<img src="../src/app/exhaleApp.ico" alt="exhale" title="exhale" height="48" width="48"></p>
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