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M00044019

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ETS 300 581-4 : 20001

EUROPEAN DIGITAL CELLULAR TELECOMMUNICATIONS SYSTEM - HALF RATE SPEECH - COMFORT NOISE ASPECTS FOR THE HALF RATE SPEECH TRAFFIC CHANNELS

European Telecommunications Standards Institute

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Table of Contents

Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
  3.1 Definitions
  3.2 Symbols
4 General
5 Functions on the transmit (TX) side
  5.1 Background acoustic noise evaluation
  5.2 Modification of the speech encoding algorithm
      during SID frame generation
  5.3 SID-frame encoding
6 Functions on the receive (RX) side
  6.1 Averaging of the GS parameters
  6.2 Comfort noise generation and updating
7 Computational details
History

Abstract

Provides the detailed requirements for the correct operation of the background acoustic noise evaluation, noise parameter encoding/decoding and comfort noise generation in GSM Mobile Stations (MS)s and Base Station Systems (BSS)s during Discontinuous Transmission (DTX) on half rate speech traffic channels.

General Product Information

Document Type Standard
Status Current
Publisher European Telecommunications Standards Institute
Committee SMG 2