Table of Contents
1Introduction
2Scope
3References
4Abbreviations
5Voice-banddataperformance
5.1TestSet-upArchitecture
5.2Impairments
5.3MeasurementProcedures
5.4Transmitandecholevels
5.5Performancemeasurements
5.6Calibration
6Narrow-bandsignalperformance
6.1SystemNo.5inter-registersignalling
6.2R-2Signalling
6.3DTMFSignals
6.4SystemNo.5linesignalling
6.5CircuitContinuityTones
6.6Echocancellerdisablingtone
6.7Distortion,frequencyandlevel
7Codingdelay
7.1Totaldelaymeasurementmethod
8Convergencetime
8.1Encoder/decoderdecorrelation
8.2Encoder/decoderstatemismatch
8.3Attacktime
8.4Measurementmethod
9Facsimileperformance
Bibliography Abstract
Covers methods that can be used for quantifying and characterizing the performance of low-rate digital speech codecs with non-voice signals. The signals used are those employed within the telephone network and consequently the methods are most appropriate for speech codecs intended for network applications.
