Tech-invite3GPPspaceIETFspace
21222324252627282931323334353637384‑5x

Content for  TS 26.445  Word version:  18.0.0

Top   Top   Up   Prev   Next
1…   2…   5…   5.2…   5.4…   6…   7…

 

5  Functional description of the encoderp. 25

5.1  Common processingp. 25

5.1.1  High-pass Filteringp. 25

5.1.2  Complex low-delay filter bank analysisp. 25

5.1.3  Sample rate conversion to 12.8 kHzp. 27

5.1.4  Pre-emphasisp. 29

5.1.5  Spectral analysisp. 30

5.1.6  Bandwidth detectionp. 32

5.1.7  Bandwidth decisionp. 34

5.1.8  Time-domain transient detectionp. 37

5.1.9  Linear prediction analysisp. 38

5.1.10  Open-loop pitch analysisp. 43

5.1.11  Background noise energy estimationp. 52

5.1.12  Signal activity detectionp. 68

5.1.13  Coding mode determinationp. 90

5.1.13.1  Unvoiced signal classificationp. 91

5.1.13.2  Stable voiced signal classificationp. 96

5.1.13.3  Signal classification for FECp. 96

5.1.13.4  Transient signal classificationp. 99

5.1.13.5  Modification of coding mode in special casesp. 100

5.1.13.6  Speech/music classificationp. 101

5.1.14  Coder technology selectionp. 120


Up   Top   ToC