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RTP Payload Format for the TETRA Audio Codec
https://datatracker.ietf.org/doc/draft-ietf-payload-tetra/01/
The TETRA codec is designed for compressing 30ms of audio speech data into 137 bits. The TETRA codec is designed in such a way that on the air interface two of these 30ms samples are transported together (sub- block 1 and sub-block 2).
EN 300 395-1 - V1.2.1 - Terrestrial Trunked Radio …
https://www.etsi.org/deliver/etsi_en/300300_300399/30039501/01.02.01_60/en_30039501v010201p.pdf
audio parts are provided only for the convenience of the reader, but are not further defined in the TETRA standard. Therefore, the audio input and output to and from the TETRA speech CODEC is specified as 16 bit linear Pulse Code Modulated (PCM). In most of the operational configurations, the speech CODEC will be associated to an encryption unit.
Tetra-decoder
https://kelseywlodarczyk92.wixsite.com/lacteruvil/post/tetra-decoder
The bit rate of the TETRA codec is 4,567 kbps and it makes use of the ACELP paradigm .... Dec 8, 2017 — SDR# also decodes RDS signals from broadcast FM. ... Telive is a program that can be used to decode TETRA digital voice signals.. The TETRA codec is designed for compressing 30ms of audio speech data into ...
TS 100 392-3-6 - V1.1.1 - Terrestrial Trunked Radio …
https://www.etsi.org/deliver/etsi_ts/100300_100399/1003920306/01.01.01_60/ts_1003920306v010101p.pdf
TETRA voice codec encoded audio (speech) is mapped into First Speech Transport Encoding format (FSTE) used for voice signal transmission between SwMIs, see figure 1. The TETRA speech encoding is defined in ETS 300 395-2 [1] and the G.704 framing is defined in ITU-T Recommendation G.704. B1 B2 B7 B3 B4 1 timeslot = 8 bits (64 kbit/s circuit)
RTP Payload Format for the TETRA Audio Codec
https://datatracker.ietf.org/doc/draft-ietf-payload-tetra/
This document specifies a Real-time Transport Protocol (RTP) payload format for TETRA encoded speech signals. The payload format is designed to be able to interoperate with …
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