PRETS 300 395-2-1995 Radio Equipment and Systems (RES); Trans-European Trunked Radio (TETRA); Speech Codec for Full-Rate Traffic Channel; Part 2: TETRA Codec
This ETS contains the full specification of the speech codec for use in the Trans-European Trunked Radio (TETRA) system. Clause 4 provides a complete description of the full rate speech source encoder and decoder@ whilst clause 5 describes the speech channel encoder@ and clause 6 the speech channel decoder. Clause 7 describes the codec performance@ including the minimum required speech channel decoder performance. Finally@ clause 8 introduces the bit exact description of the codec. This description is given as an ANSI C code@ fixed point@ bit exact. The whole C code corresponding to the TETRA codec is given in computer files attached to this ETS@ and are an integral part of this ETS. In addition to these clauses@ five informative annexes are provided. Annex A describes a possible implementation of the speech channel decoding function. Annex B provides comprehensive indexes of all the routines and files included in the C code associated with this ETS. Annex C lists informative references relevant to the speech codec. Annex D describes the actual quality@ performance and complexity aspects of the codec. Annex E reports detailed results from codec characterisation listening and complexity tests. Annex F contains instructions for the use of the attached diskette.
PRETS 300 395-2-1995 history
1997PRETS 300 395-2-1997 Terrestrial Trunked Radio (TETRA); Speech Codec for Full-Rate Traffic Channel; Part 2: TETRA Codec (Second Edition)
1996PRETS 300 395-2-1996 Radio Equipment and Systems (RES); Trans-European Trunked Radio (TETRA); Speech Codec for Full-Rate Traffic Channel; Part 2: TETRA Codec
1995PRETS 300 395-2-1995 Radio Equipment and Systems (RES); Trans-European Trunked Radio (TETRA); Speech Codec for Full-Rate Traffic Channel; Part 2: TETRA Codec