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Speech Codec » History » Version 3

laforge, 02/19/2016 10:52 PM
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h1. TETRA Speech Codec
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The TETRA speech codec is part of the family of ACELP codecs.
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For more information, please check out the following specifications:
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* ETSI EN 300 395-1 (General description of speech functions)
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* ETSI EN 300 395-2 (TETRA Codec)
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* ETSI EN 300 395-3 (Specific operating features)
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* ETSI EN 300 395-4 (Codec conformance testing)
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h2. Implementations
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ETSI has published a reference implementation of the codec implemented in C.
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It is freely available together with ETSI EN 300 395-2.
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In order to obtain it, follow the following procedure:
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* go to http://pda.etsi.org/
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* enter "en 300 395-2" as search term
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* execute the search, there should only be one result in the list
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* click on the 'Download' link (top right part of the result table)
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* enter your e-mail address in the 'users without an ETSI account' field
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* click submit
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* click on the folder-like symbol on the bottom left side of the result table (see below)
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* you should now have a file called _en_30039502v010301p0.zip_
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[[Image(etsi_codec_download.png, 75%)]]
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