CONTENTS

1 Scope
2 References
3 Terms and definitions
4 Abbreviations and acronyms
5 Interaction aspects of signal processing network equipment
5.1 Interaction aspects of echo suppressors
5.2 Interaction aspects of echo cancellers
5.2.1 Interaction of echo cancellers with facsimile transmission
5.2.2 Interaction of echo cancellers with modems
5.2.3 Interaction between echo cancellers (tandemed echo cancellers)
5.2.4 Interaction of echo cancellers with CME
5.2.5 Interaction with non-linearities and time variant signal processing techniques
5.2.6 PCM offset
5.3 Interaction aspects of voice enhancement devices
5.3.1 Interaction aspects between Voice Enhancement Devices (VEDs), mobile applications and mobile networks
5.4 Interaction aspects of automatic level control
5.5 Interaction aspects of circuit multiplication equipment
5.5.1 Interaction aspects of circuit multiplication equipment related to speech quality effects
5.5.2 Synchronous reset in CME
5.6 Interaction aspects of acoustic echo controllers
5.6.1 Scope
5.6.2 Rin path speech coding
5.6.3 Soutpath speech coding
5.6.4 Interworking of AECs with network echo cancellers
5.6.5 Interworking of AECs with CME
5.7 Interaction aspects of voice gateways
5.7.1 Level offset
5.7.2 Backround noise
5.7.3 Tandem signal coding
5.7.4 Tandeming of voice gateways
5.7.5 Low bit rate coding and other non-linear effects
5.7.6 Voiceband data signals, signalling tones, facsimile traffic, call-processing tones, speech
5.7.7 Interaction aspects of 3rd generation wireless networks related to speech quality effects
Appendix I Tandem-Free Operation (TFO)
I.1 Introduction
I.2 Essence of the current standards