TETRA Speech Codec¶

The TETRA speech codec is part of the family of ACELP codecs.

For more information, please check out the following specifications:

• ETSI EN 300 395-1 (General description of speech functions)
• ETSI EN 300 395-2 (TETRA Codec)
• ETSI EN 300 395-3 (Specific operating features)
• ETSI EN 300 395-4 (Codec conformance testing)

Implementations¶

ETSI has published a reference implementation of the codec implemented in C.

It is freely available together with ETSI EN 300 395-2.

In order to obtain it, follow the following procedure:

• go to http://pda.etsi.org/
• enter "en 300 395-2" as search term
• execute the search, there should only be one result in the list
• click on the 'Download' link (top right part of the result table)
• enter your e-mail address in the 'users without an ETSI account' field
• click submit
• click on the folder-like symbol on the bottom left side of the result table (see below)
• you should now have a file called en_30039502v010301p0.zip