Table of Contents

Foreword
1 Scope
2 Normative references
3 Definitions and abbreviations
  3.1 Definitions
  3.2 Abbreviations
4 Speech encoder
  4.1 Encoder homing function
  4.2 Speech importance function
  4.3 Comfort noise function
  4.4 Frame stealing function
  4.5 Test mode functions
  4.6 Encryption interface
5 Speech decoder
  5.1 Encryption interface
  5.2 Decoder homing function
  5.3 Missing frame generation
  5.4 Missing frame substitution
  5.5 Test mode functions
6 Signalling Data Block Format
Annex A (informative): Implementation of optional
        features
  A.1 Speech importance calculation
  A.2 Voice Activity Detection (VAD)
  A.3 Discontinuous Transmission (DTX)
  A.4 CNF computation
  A.5 Missing Frame Generation (MFG)
  A.6 Setting BFI
  A.7 U-plane frame stealing
  A.8 Receiver muting
  A.9 Response to U-plane signalling
History

Abstract

Describes all the functions associated with the TETRA speech codec, excepted the specification of the codec by itself which is entirely defined in ETS 300 395-2 [2].

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TETRA
Supersedes	PRETS 300 395-3 : 1996