ETSI TS 126 404 V8.0.0 (2009-01).PDF

ETSI TS 126 404 V8.0.0 (2009-01) Technical Specification Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); LTE; General audio codec audio processing functions; Enhanced aacPlus general audio codec; Encoder specification; Spectral Band Replication (SBR) part (3GPP TS 26.404 version 8.0.0 Release 8) ETSI ETSI TS 126 404 V8.0.0 (2009-01) 1 3GPP TS 26.404 version 8.0.0 Release 8 Reference RTS/TSGS-0426404v800 Keywords GSM, LTE, UMTS ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2009. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 126 404 V8.0.0 (2009-01) 2 3GPP TS 26.404 version 8.0.0 Release 8 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. ETSI ETSI TS 126 404 V8.0.0 (2009-01) 3 3GPP TS 26.404 version 8.0.0 Release 8 Contents Intellectual Property Rights.2 Foreword.2 Foreword.4 1 Scope.5 2 Normative references .5 3 Definitions, symbols and abbreviations .5 3.1 Definitions.5 3.2 Symbols.6 3.3 Abbreviations.7 4 Outline description.7 5 SBR encoder description.7 5.1 SBR tools overview.7 5.1.1 Enhanced aacPlus sdynchronization without parametric stereo.8 5.1.2 Enhanced aacPlus synchronisation with parametric stereo.9 5.1.3 SBR encoder modules overview.10 5.2 Analysis filterbank .12 5.3 Frequency band tables.15 5.4 Time / frequency grid generation.15 5.4.1 Transient detector .15 5.4.2 Frame splitter.16 5.4.3 Frame generator.17 5.5 Envelope estimation.21 5.6 Additional control parameters.22 5.6.1 Introduction.22 5.6.2 Tonality estimation.23 5.6.3 Noise-floor estimation .24 5.6.4 Inverse filtering estimation.25 5.6.5 Additional sines estimation.26 5.7 Data quantization.29 5.8 Envelope and noise floor coding.30 6 Bitstream.32 Annex A (informative): Change history.34 History.35 ETSI ETSI TS 126 404 V8.0.0 (2009-01) 4 3GPP TS 26.404 version 8.0.0 Release 8 Foreword The present document describes the detailed mapping of the general audio service employing the aacPlus general audio codec within the 3GPP system. The contents