1、 INTERNATIONAL STANDARD IEC 61937-5Second edition 2006-01Digital audio Interface for non-linear PCM encoded audio bistreams applying IEC 60958 Part 5: Non-linear PCM bitstreams according to the DTS (Digital Theater Systems) format(s) Reference number IEC 61937-5:2006(E) Publication numbering As from
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8、: +41 22 919 03 00 INTERNATIONAL STANDARD IEC 61937-5Second edition 2006-01Digital audio Interface for non-linear PCM encoded audio bistreams applying IEC 60958 Part 5: Non-linear PCM bitstreams according to the DTS (Digital Theater Systems) format(s) IEC 2006 Copyright - all rights reserved No part
9、 of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, Switzerland Te
10、lephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch P For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission 2 61937-5 IEC:2006(E) CONTENTS FOREWORD.3 1 Scope.5 2 Normative references .5 3
11、Terms, definitions, abbreviations and presentation convention .5 3.1 Terms and definitions .5 3.2 Abbreviations 5 3.3 Presentation convention6 4 Mapping of the audio bitstream on to IEC 61937-1 .6 4.1 DTS burst-info.6 5 Format of DTS data-bursts .6 5.1 General .6 5.2 Pause data-burst.6 5.3 Audio dat
12、a-bursts 7 Annex A (informative) Effect of repetition period of data burst and Fs on frame period and maximum data rate in DTS type IV.14 Bibliography15 Table 1 Fields of burst-info 6 Table 2 Repetition period of the pause data-bursts 7 Table 3 Data-type-dependent when DTS type I .7 Table 4 Data-typ
13、e-dependent when DTS type II 9 Table 5 Data-type-dependent when DTS type III .10 Table 6 Data-type-dependent when DTS type IV.12 Table A.1 DTS type IV payload and frame repetition: some examples14 61937-5 IEC:2006(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ DIGITAL AUDIO INTERFACE FOR NON-LINEA
14、R PCM ENCODED AUDIO BITSTREAMS APPLYING IEC 60958 Part 5: Non-linear PCM bitstreams according to the DTS (Digital Theater Systems) format(s) FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical commit
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23、xpenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) A
24、ttention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61937-5 has been prepared by Technical Area 4: Digital system interf
25、aces and protocols, of IEC technical committee 100: Audio, video and multimedia systems and equipment. This second edition cancels and replaces the first edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with r
26、espect to the previous edition. a) References to the company name Digital Theater Systems have been changed to DTS which is consistent with the official change of the company name. 4 61937-5 IEC:2006(E) b) DTS type IV has been added to Table 1 and 5.3.4 describing type IV has been added. c) Annex A,
27、 which provides examples of the use of the repetition period parameter introduced in subclause 5.3.4, has been added. The text of this standard is based on the following documents: CDV Report on voting 100/974/CDV 100/1055/RVC Full information on the voting for the approval of this standard can be f
28、ound in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. IEC 61937 consists of the following parts, under the general title Digital audio Interface for non-linear PCM encoded audio bitstreams applying IEC 60958: P
29、art 1: General Part 2: Burst-info Part 3: Non-linear PCM bitstreams according to the AC-3 format Part 4: Non-linear PCM bistreams according to the MPEG audio formats Part 5: Non-linear PCM bitstreams according to the DTS (Digital Theater Systems) format(s) Part 6: Non-linear PCM bitstreams according
30、 to the ATRAC, ATRAC2/3 and ATRAC-X formats Part 8: Non-linear PCM bitstreams according to the Windows Media Audio Professional 1The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore
31、.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. 1To be published. 61937-5 IEC:2006(E) 5 DIGITAL AUDIO INTERFACE FO
32、R NON-LINEAR PCM ENCODED AUDIO BITSTREAMS APPLYING IEC 60958 Part 5: Non-linear PCM bitstreams according to the (Digital Theater Systems) DTS format(s) 1 Scope This part of IEC 61937 describes audio bitstreams encoded according to the Digital Theater Systems (DTS) format data-types I, II, III, and I
33、V. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60958-1, Digital au
34、dio interface Part 1: General IEC 60958-3, Digital audio interface Part 3: Consumer applications IEC 60958-4, Digital audio interface Part 4: Professional applications IEC 61937-1, Digital audio Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 Part 1: General IEC 61937-2, Dig
35、ital audio Interface for non-linear PCM encoded audio bitstreams applying IEC 60958 Part 2: Burst Information 3 Terms, definitions, abbreviations and presentation convention For the purposes of this document, the following terms, definitions, abbreviations and presentation convention apply. 3.1 Defi
36、nitions 3.1.1 latency delay time of an external audio decoder to decode a DTS data-burst, defined as the sum of two values of the receiving delay time and the decoding delay time 3.2 Abbreviations IEC International Electrotechnical Commission ISO/IEC MPEG The Moving Pictures Expert Group, a joint co
37、mmittee of ISO and IEC 6 61937-5 IEC:2006(E) 3.3 Presentation convention F872h Value F872 in hexadecimal format 4 Mapping of the audio bitstream on to IEC 61937-1 The coding of the bitstream and data-burst is in accordance with IEC 61937-1 and 61937-2. 4.1 DTS burst-info The 16-bit burst-info contai
38、ns information about the data which will be found in the data-burst. Table 1 Fields of burst-info Bits of Pc Value Contents Reference point R Repetition period of data-burst in IEC 60958 frames 0-4 Data-type 0-10 According to IEC 61937 11 DTS type I Bit 0 of Pa 512 12 DTS type II Bit 0 of Pa 1 024 1
39、3 DTS type III Bit 0 of Pa 2 048 14-16 According to IEC 61937 17 DTS type IV Dependent on bits 8-10 14-31 According to IEC 61937 Bit 0 of Pa 5, 6 Reserved 7 According to IEC 61937 8-10 Reserved for DTS types I, II and III For the repetition period for DTS type IV, see Table 6 11, 12 Reserved 13-15 A
40、ccording to IEC 61937 5 Format of DTS data-bursts This clause specifies the audio data-bursts DTS type I, DTS type II, DTS type III and DTS type IV. Specific properties such as reference points, repetition period, the method of filling stream gaps, and decoding latency are specified for each data-ty
41、pe. 5.1 General The decoding latency (or delay), indicated for the data-types, should be used by the transmitter to schedule data-bursts as necessary to establish synchronization between picture and decoded audio. 5.2 Pause data-burst Pause data-burst for DTS type I, DTS type II, DTS type III and DT
42、S type IV is given in Table 2. 61937-5 IEC:2006(E) 7 Table 2 Repetition period of the pause data-bursts Repetition period of pause data-burst Data-type of audio data-burst Mandatory Recommended DTS type I - 3 IEC 60958 frames DTS type II - 3 IEC 60958 frames DTS type III - 3 IEC 60958 frames DTS typ
43、e IV - 3 IEC 60958 frames 5.3 Audio data-bursts 5.3.1 DTS type I The DTS bitstream consists of sequences of DTS frames. The data-type of a DTS data-burst type I is 0Bh. The data-burst is headed with a burst-preamble, followed by the burst-payload, and stuffed with stuffing bits. The burst-payload of
44、 each data-burst of DTS type I data shall contain one complete DTS-frame and represents 512 samples for each encoded channel. NOTE 1 The length of the DTS type I data-burst depends on the encoded bit rate (which determines the DTS- frame length). NOTE 2 The reference to the specification for the DTS
45、 bitstream, representing 512 samples of encoded audio per frame, is given in the bibliography. Bit 0 of Pa DTS frame DTS type I burst_payload Pd Pa Pb Pc DTS frame Repetition period of the burst Stuffing Bit 0 of Pa Regular rate of the DTS frames DTS type I burst_payload Pd Pa Pb Pc IEC 2671/05 Figu
46、re 1 DTS type I data-burst The data-type-dependent information for DTS type I is given in Table 3. Table 3 Data-type-dependent when DTS type I Bits of Pc LSBMSB Value Contents 8-12 00h Reserved, shall be set to 0 The reference point of a DTS type I data-burst is bit 0 of Pa and occurs exactly once e
47、very 512 sampling periods. The data-burst containing DTS type I frames occurs at a regular rate, with the reference point of each DTS type I data-burst beginning 512 IEC 60958 frames after the reference point of the preceding DTS type I data-burst (of the same bit-stream-number). It is recommended t
48、hat pause data-bursts be used to fill stream gaps in the DTS type I bitstream, as described in IEC 61937, and that pause data-bursts be transmitted with a repetition period of 3 IEC 60958 frames, except when other repetition periods are necessary to fill the precise stream gap length (which may not
49、be a multiple of 3 IEC 60958 frames), or to meet the requirement on burst spacing (see IEC 61937). 8 61937-5 IEC:2006(E) When a stream gap in a DTS type I stream is filled by a sequence of pause data-bursts, the Pa of the first pause data-burst shall be located 512 sampling periods following the Pa of the previous DTS type I frame. It is recommended that the sequence(s) of pause data-bursts which fil
