Content for TS 46.042 Word version: 18.0.0
5 Functional description
5.1 Overview and principles of operation
5.2 Algorithm description
6 Computational description overview
6.1 VAD modules
6.2 Pseudo-floating point arithmetic
A VAD performance
B Simplified block filtering operation
C Pole frequency calculation
$ Change History
5 Functional description p. 7
5.1 Overview and principles of operation p. 8
5.2 Algorithm description p. 8
5.2.1 Adaptive filtering and energy computation p. 9
5.2.2 ACF averaging p. 9
5.2.3 Predictor values computation p. 10
5.2.4 Spectral comparison p. 10
5.2.5 Information tone detection p. 11
5.2.6 Threshold adaptation p. 11
5.2.7 VAD decision p. 14
5.2.8 VAD hangover addition p. 14
5.2.9 Periodicity detection p. 14
6 Computational description overview p. 15
6.1 VAD modules p. 15
6.2 Pseudo-floating point arithmetic p. 15
A VAD performance p. 17
B Simplified block filtering operation p. 18
C Pole frequency calculation p. 19
$ Change History p. 20
