Content for TS 46.032 Word version: 18.0.0
5 Functional description
6 Computational details
7 Digital test sequences
A -
B Test sequences
$ Change History
5 Functional description p. 7
5.1 Overview and principles of operation p. 7
5.2 Algorithm description p. 7
5.2.1 Adaptive filtering and energy computation p. 9
5.2.2 ACF averaging p. 9
5.2.3 Predictor values computation p. 9
5.2.4 Spectral comparison p. 10
5.2.5 Periodicity detection p. 10
5.2.6 Information tone detection p. 11
5.2.7 Threshold adaptation p. 12
5.2.8 VAD decision p. 15
5.2.9 VAD hangover addition p. 15
6 Computational details p. 15
6.1 Adaptive filtering and energy computation p. 17
6.2 ACF averaging p. 18
6.3 Predictor values computation p. 18
6.3.1 Schur recursion to compute reflection coefficients p. 19
6.3.2 Step-up procedure to obtain the aav1[0..8] p. 19
6.3.3 Computation of the rav1[0..8] p. 20
6.4 Spectral comparison p. 20
6.5 Periodicity detection p. 21
6.6 Threshold adaptation p. 21
6.7 VAD decision p. 23
6.8 VAD hangover addition p. 23
6.9 Periodicity updating p. 24
6.10 Tone detection p. 24
7 Digital test sequences p. 27
7.1 Test configuration p. 27
7.2 Test sequences p. 28
A - p. 29
A.1 Simplified block filtering operation p. 29
A.2 Description of digital test sequences p. 29
A.2.1 Test sequences p. 29
A.2.2 File format description p. 31
A.3 VAD performance p. 33
A.4 Pole frequency calculation p. 34
B (Normative) Test sequences p. 35
$ Change History p. 36
