BOLT CTS CallFriend CallHome Egyptian Arabic Audio

<h3>Introduction</h3>
<p>BOLT CTS CALLFRIEND CALLHOME Egyptian Arabic Audio (LDC2025S09) was developed by the Linguistic Data Consortium (LDC) and consists of approximately 116 hours of speech from 274 unscripted telephone conversations between native speakers of the Arabic dialect spoken in Egypt.</p>
<p>The DARPA BOLT (Broad Operational Language Translation) program developed machine translation and information retrieval for less formal genres, focusing particularly on user-generated content. LDC supported the BOLT program by collecting informal data sources -- discussion forums, conversational telephone speech, text messaging and chat -- in Chinese, Egyptian Arabic and English. The material in this release represents the unannotated Egyptian Arabic source conversational telephone speech. The telephone data was subseqently transcribed, translated, and annotated for various tasks in the BOLT program including word alignment, treebanking, and co-reference.</p>
<p>CALLFRIEND and CALLHOME were collections of multilingual telephone speech conducted by LDC in support of language identification and speech identification technology development.</p>
<h3>Data</h3>
<p>Many of the recordings in this corpus (82 calls, approximately 30%) are publicly released for the first time. The remainder (192 recordings, approximately 70%) were previously published in various CALLFRIEND, CALLHOME and HUB5 Arabic datasets.</p>
<p>All calls originated in North America and were placed to locations overseas. Most participants called family members or close friends. Participants spoke on topics of their choice. Conversations lasted up to 30 minutes. Completed calls passed through a human auditing process to verify that the target language was spoken by the participants, to check the quality of the recordings, and to record information about dialect, noise and distortion.</p>
<p>The data is divided into training, development, and evaluation partitions as follows:</p>
<table border="1" summary="data volume">
<tbody>
<tr>
<td>Partition</td>
<td>Audio Files</td>
<td>Total Hours</td>
</tr>
<tr>
<td>train</td>
<td>203</td>
<td>89.16</td>
</tr>
<tr>
<td>dev</td>
<td>16</td>
<td>5.58</td>
</tr>
<tr>
<td>eval</td>
<td>55</td>
<td>21.58</td>
</tr>
<tr>
<td>total</td>
<td>274</td>
<td>116.32</td>
</tr>
</tbody>
</table>
<p>Audio files are presented in FLAC-compressed MS-WAV/RIFF format; they are two-channel, 16-bit sample data (converted from original mu-law samples) at 8000 samples/second. The audio is contained in two interleaved channels per file representing the two independently recorded sides of the telephone conversation.</p>
<h3>Acknowledgement</h3>
<p>This material is based upon work supported by the Defense Advanced Research Projects Agency (DARPA) under Contract No. HR0011-11-C-0145. The content does not necessarily reflect the position or the policy of the Government, and no official endorsement should be inferred.</p>
<h3>Updates</h3>
<p>No updates at this time.</p>