Tech-invite 3GPPspace IETFspace

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Content for TS 26.404 Word version: 18.0.0

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3.1 Definitions 3.2 Symbols 3.3 Abbreviations 5.1 SBR tools overview 5.2 Analysis filterbank 5.3 Frequency band tables 5.4 Time / frequency grid generation 5.5 Envelope estimation 5.6 Additional control parameters 5.7 Data quantization 5.8 Envelope and noise floor coding

2 Normative references p. 5

3 Definitions, symbols and abbreviations p. 5

3.1 Definitions p. 5

3.2 Symbols p. 6

3.3 Abbreviations p. 7

4 Outline description p. 7

5 SBR encoder description p. 7

5.1 SBR tools overview p. 7

5.1.1 Enhanced aacPlus sdynchronization without parametric stereo p. 8

5.1.2 Enhanced aacPlus synchronisation with parametric stereo p. 9

5.1.3 SBR encoder modules overview p. 10

5.2 Analysis filterbank p. 12

5.3 Frequency band tables p. 15

5.4 Time / frequency grid generation p. 15

5.4.1 Transient detector p. 15

5.4.2 Frame splitter p. 16

5.4.3 Frame generator p. 17

5.5 Envelope estimation p. 21

5.6 Additional control parameters p. 22

5.6.1 Introduction p. 22

5.6.2 Tonality estimation p. 23

5.6.3 Noise-floor estimation p. 24

5.6.4 Inverse filtering estimation p. 25

5.6.5 Additional sines estimation p. 26

5.7 Data quantization p. 29

5.8 Envelope and noise floor coding p. 30

6 Bitstream p. 32

$ Change history p. 34