ISO IEC 23003-3 AMD 1 CORR 1-2015 Information technology - MPEG audio technologies - Part 3 Unified speech and audio coding - Amendment 1 Conformance Technical .pdf

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1、 INTERNATIONAL STANDARD ISO/IEC 23003-3:2012/Amd.1:2014 TECHNICAL CORRIGENDUM 1 Published 2015-07-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION LECTROTECHNIQUE INTERNATIONALEInformation technology M

2、PEG audio technologiest Part 3: Unified speech and audio coding AMENDMENT 1: Conformance TECHNICAL CORRIGENDUM 1 Technologies de linformation Technologies audio MPEG Partie 3: Discours unifi et codage audio AMENDEMENT 1: Conformit RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to ISO/IEC 23003-3:2

3、012/Amd.1:2014 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. Replace the conformance test sequences in the electronic attachment to Amd.1 with the contents of the electronic attach

4、ment of this document. The updated and new conformance test sequences associated with this corrigendum are also made available by adding / updating the conformance test sequences on the FTP server: ftp:/mpaudconfftp.iis.fraunhofer.de/mpegDusac-conformance/ ICS 35.040 Ref. No. ISO/IEC 23003-3:2012/Am

5、d.1:2014/Cor.1:2015(E) ISO/IEC 2015 All rights reserved Published in Switzerland ISO/IEC 23003-3:2012/Amd.1:2014/Cor.1:2015(E) 2 ISO/IEC 2015 All rights reservedIn 8.4.4.2.2 replace: window_shape no restrictions apply with: window_shape A compliant bitstream shall set window_shape to 0 if the next b

6、lock is encoded in LPD coding mode. However, decoders are required to handle both window_shapes for all transitions. In at the end of 8.5.1 add: Some conformance test sequences that are defined in the USAC Conformance testing clause are not present on the conformance repository. Owing to the very un

7、usual combination of tested parameters in certain conformance test conditions these files exhibit digital clipping and have therefore been excluded from the collection of conformance test sequences. In 8.5.2.2.2 replace: For test cases that combine the FD window switching test condition Win with oth

8、er test conditions (e.g. WinNf), the window sequences listed in Table 158 are run through a first time using sine (window_shape 0) and a second time using KBD (window_shape 1). This set of window sequences and window_shapes is then repeated for the remainder of the bitstream. With: For test cases th

9、at combine the FD window switching test condition Win with other test conditions (e.g. WinNf), the window sequences listed in Table 158 are run through a first time using using KBD (window_shape 1) and a second time using sine (window_shape 0). This set of window sequences and window_shapes is then repeated for the remainder of the bitstream.