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TS 26.077SA4
Minimum Performance Requirements for Noise Suppresser –
Application to the Adaptive Multi-Rate (AMR) Speech Encoder

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Rapporteur:  Mr. Usai, Paolino

This TS specifies recommended minimum performance requirements for noise suppression algorithms intended for application in conjunction with the AMR speech encoder. This TS is for guidance purposes. Noise Suppression is intended to enhance the speech signal corrupted by acoustic noise at the input to the AMR speech encoder.

full Table of Contents for  TS 26.077  Word version:   15.0.0

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1  ScopeWord-p. 7
2  References
3  Definitions and abbreviationsWord-p. 8
4  Description of Noise Suppression applied to AMR
5  Requirements to be assessed by Objective Means
6  Requirements to be assessed by subjective tests
7  Performance Objectives assessed by Objective Measures
8  Interaction with supplementary servicesWord-p. 12
9  Interaction with Alternate and Followed by services
10  Interaction with other speech services
11  Interaction with DTMF and other signalling tonesWord-p. 13
12  Interaction with Lawful InterceptUp
13  Interaction with TFO
A  Method for generating Objective Performance MeasuresWord-p. 14
B (Normative)  Methodology for Measuring Subjective SNR Improvement for CCR ExperimentsWord-p. 20
C (Normative)  Test Plan for Checking Conformance to RequirementsWord-p. 21
C.1  Introduction
C.2  Document Structure
C.3  References, Conventions, and ContactsWord-p. 22
C.4  Key Acronyms
C.5  Roles and ResponsibilitiesWord-p. 23
C.6  Information relevant to all Experiments
C.7  Experiment 1: Degradation in Clean Speech (Pair Comparison Test)
C.8  Experiments 2a, 2b & 2c: No degradation of Speech and no Undesirable Effects in Residual Noise in Conditions with Background Noise (ACR)Word-p. 32
C.9  Experiments 3a & 3b: Performances in Background Noise Conditions (Mod-CCR)Word-p. 37
C.10  Experiments 4: Influence of Input Level, Voice Activity Detection and Discontinuous Transmission (CCR)Word-p. 42
C.11  Instructions to subjects and data collection
C.12  Processing Tables
C.13  Presentation OrdersWord-p. 49
D  Change historyWord-p. 50

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