1、 IEC 61937-10 Edition 2.0 2017-07 INTERNATIONAL STANDARD Digital audio interface for non-linear PCM encoded audio bitstreams applying IEC 60958 Part 10:Non-linear PCM bitstreams according to the MPEG-4 audio lossless coding(ALS)format IEC 61937-10:2017-07(en)THIS PUBLICATION IS COPYRIGHT PROTECTED C
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10、webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:csciec.ch.IEC 61937-10 Edition 2.0 2017-07 INTERNATIONAL STANDARD Digital audio interface for non-linear PCM encoded audio bitstreams applying IEC 60958
11、Part 10:Non-linear PCM bitstreams according to the MPEG-4 audio lossless coding(ALS)format INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.160.30;35.240.99 ISBN 978-2-8322-4560-6 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publicati
12、on from an authorized distributor.2 IEC 61937-10:2017 IEC 2017 CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Terms,definitions,abbreviated terms and conventions.5 3.1 Terms and definitions.5 3.2 Abbreviated terms.7 3.3 Presentation convention.7 4 Mapping of the audio bitstream onto IEC 61
13、937.7 4.1 General.7 4.2 MPEG-4 ALS burst-info.7 5 Format of MPEG-4 ALS data-bursts.8 5.1 General.8 5.2 Audio data-bursts.9 5.2.1 Data-burst for MPEG-4 ALS.9 5.2.2 Latency of MPEG-4 ALS decoding.10 5.2.3 Data-burst for MPEG-4 ALS in LATM/LOAS.12 Annex A(informative)Effect of repetition period of data
14、-burst and IEC 60958 frame rate on frame period for the MPEG-4 ALS bitstreams.13 Annex B(normative)Burst payload format for MPEG-4 ALS.14 Annex C(normative)Values for ALSSpecificConfig in the MPEG-4 ALS burst payload format.15 Annex D(informative)Example use case of the ALS simple profile in LATM/LO
15、AS.17 Figure 1 MPEG-4 ALS data-burst.9 Figure 2 Latency of MPEG-4 ALS decoding.11 Figure 3 The MPEG-4 ALS burst-payload.11 Figure 4 MPEG-4 ALS burst-payload with LATM/LOAS header.12 Figure B.1 MPEG-4 ALS burst-payload.14 Table 1 Fields of burst-info (data-type bits 0-4=23,data-type bits 5-6=0/data-t
16、ype bits 0-4=25,data-type bits 5-6=2).8 Table 2 Sampling frequency,multiplier,and IEC 60958 frame rate.10 Table A.1 MPEG-4 ALS payload and frame repetition:some examples.13 Table C.1 Recommended values for the ALSSpecificConfig in the MPEG-4 ALS burst-payload.15 Table D.1 MPEG-4 ALS simple profile,maximum payload size and frame repetition:some examples.17 IEC 61937-10:2017 IEC 2017 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ DIGITAL AUDIO INTERFACE FOR NON-LINEAR PCM ENCODED AUDIO BITSTREAMS A
