SMPTE ST 338-2015 Format for Non-PCM Audio and Data in AES3 - Data Types.pdf

1、 Approved March 27, 2015 Copyright 2015 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Table of Contents Page Foreword 2 Intellectual Property . 2 Introduction. 2 1 Scope 3 2 Conformance Notation 3 3 Normative References 3 4 Data Type

2、s 4 5 Extended Data Types 5 Annex A Bibliography (Informative) 6 SMPTE ST 338:2015 Revision of SMPTE ST 338:2010 SMPTE STANDARD Format for Non-PCM Audio and Data in AES3 Data Types Page 1 of 6 pages SMPTE ST 338:2015 Page 2 of 6 pages Foreword SMPTE (the Society of Motion Picture and Television Engi

3、neers) is an internationally-recognized standards developing organization. Headquartered and incorporated in the United States of America, SMPTE has members in over 80 countries on six continents. SMPTEs Engineering Documents, including Standards, Recommended Practices, and Engineering Guidelines, a

4、re prepared by SMPTEs Technology Committees. Participation in these Committees is open to all with a bona fide interest in their work. SMPTE cooperates closely with other standards-developing organizations, including ISO, IEC and ITU. SMPTE Engineering Documents are drafted in accordance with the ru

5、les given in its Standards Operations Manual. SMPTE ST 338 was prepared by Technology Committee 32NF. Intellectual Property At the time of publication no notice had been received by SMPTE claiming patent rights essential to the implementation of this Engineering Document. However, attention is drawn

6、 to the possibility that some of the elements of this document may be the subject of patent rights. SMPTE shall not be held responsible for identifying any or all such patent rights. Introduction This section is entirely informative and does not form an integral part of this Engineering Document. An

7、 associated standard, SMPTE ST 337, describes general formatting requirements when carrying non-PCM data in an AES3 digital audio bit stream. Data are formatted into data bursts each consisting of a burst_preamble and a burst_payload. The data_type field in the burst_preamble of each data burst defi

8、nes the type of non-PCM data carried within the burst_payload of the data burst. Each data type includes additional formatting requirements not defined in SMPTE ST 337. This standard maps the value of the data_type field to specific data types and references additional standards that contain data ty

9、pe specific formatting requirements and information. No specific formatting information is contained in this standard. Some data types are mapped directly to data_type values. Specific references are included for these data types. SMPTE ST 338:2015 Page 3 of 6 pages 1 Scope This standard describes t

10、he data_type field defined in SMPTE ST 337. This field describes data types that may be carried in an AES3 digital audio interface according to SMPTE ST 337. This standard defines supported data types, but does not cover formatting that may be required for each data type. References are included for

11、 additional standards that describe data type specific formatting requirements. 2 Conformance Notation Normative text is text that describes elements of the design that are indispensable or contains the conformance language keywords: “shall“, “should“, or “may“. Informative text is text that is pote

12、ntially helpful to the user, but not indispensable, and can be removed, changed, or added editorially without affecting interoperability. Informative text does not contain any conformance keywords. All text in this document is, by default, normative, except: the Introduction, any section explicitly

13、labeled as “Informative“ or individual paragraphs that start with “Note:” The keywords “shall“ and “shall not“ indicate requirements strictly to be followed in order to conform to the document and from which no deviation is permitted. The keywords, “should“ and “should not“ indicate that, among seve

14、ral possibilities, one is recommended as particularly suitable, without mentioning or excluding others; or that a certain course of action is preferred but not necessarily required; or that (in the negative form) a certain possibility or course of action is deprecated but not prohibited. The keyword

15、s “may“ and “need not“ indicate courses of action permissible within the limits of the document. The keyword “reserved” indicates a provision that is not defined at this time, shall not be used, and may be defined in the future. The keyword “forbidden” indicates “reserved” and in addition indicates

16、that the provision will never be defined in the future. A conformant implementation according to this document is one that includes all mandatory provisions (“shall“) and, if implemented, all recommended provisions (“should“) as described. A conformant implementation need not implement optional prov

17、isions (“may“) and need not implement them as described. Unless otherwise specified, the order of precedence of the types of normative information in this document shall be as follows: Normative prose shall be the authoritative definition; Tables shall be next; then formal languages; then figures; a

18、nd then any other language forms. 3 Normative References There are no normative references. SMPTE ST 338:2015 Page 4 of 6 pages 4 Data Types Table 1 defines the data_type field described in SMPTE ST 337. See IEC 61937-2 for IEC-specific references. Table 1 Data Type Field data_type value Data type (

19、Common Industry Format Name) SMPTE Defining Document (informative) IEC 61937-2 allocation (informative) 0 Null data ST 339 Same data 1 AC-3 data (audio) ST 340 Same data 2 Time stamp data ST 339 Reserved for SMPTE 3 Pause data ST 339 Same data 4 MPEG-1 Layer I (audio) data ST 2041-1 Same data 5 MPEG

20、-1 Layer II or III (audio) data or MPEG-2 Layer 1, II, or III (audio) data without extension ST 2041-1 Same data 6 MPEG-2 Layer I, II, or III (audio) data with extension ST 2041-1 Same data 7 MPEG 2 AAC in ADTS ST 2041-2 MPEG 2 AAC 8 Reserved for compatibility with IEC MPEG-2 Layer I (audio) data lo

21、w-sampling frequency 9 Reserved for compatibility with IEC MPEG-2 Layer II (audio) data low-sampling frequency 10 MPEG-4 AAC data in ADTS or LATM/LOAS ST 2041-2 MPEG-2 Layer III (audio) data low-sampling frequency 11 MPEG-4 HE-AAC data in ADTS or LATM/LOAS ST 2041-2 DTS type I 12 Reserved for compat

22、ibility with IEC DTS type II 13 Reserved for compatibility with IEC DTS type III 14 Reserved for compatibility with IEC ATRAC 15 Reserved for compatibility with IEC ATRAC 2/3 16 Enhan Enhanced AC-3 audio data (professional applications) ST 340 ATRAC -X 17 Reserved for compatibility with IEC DTS type

23、 IV 18 Reserved for compatibility with IEC WMA professional 19 Reserved for compatibility with IEC MPEG-2 AAC low sampling frequency 20 Reserved for compatibility with IEC MPEG-4 AAC 21 Reserved for compatibility with IEC Enhanced AC-3 / Reserved (depends on IEC 61937-2 sub data-type) 22 Reserved fo

24、r compatibility with IEC MAT / Reserved (depends on IEC 61937-2 sub data-type) SMPTE ST 338:2015 Page 5 of 6 pages data_type value Data type (Common Industry Format Name) SMPTE Defining Document (informative) IEC 61937-2 allocation (informative) 23 Reserved for compatibility with IEC MPEG-4 ALS, AAC

25、, and DRA 24 Reserved Reserved 25 Reserved Reserved 26 Utility data type (V sync) ST 339 Reserved 27 SMPTE KLV data ST 355 Reserved for SMPTE 28 Dolby E (audio) data RDD 33 Reserved for SMPTE 29 Captioning data ST 341 Reserved for SMPTE 30 User defined data ST 339 Reserved for SMPTE 31 Data Type in

26、Extended Code Space ST 337 Same function 5 Extended Data Types SMPTE ST 337 makes provision for identification of additional data types when all of the codes in Table 1 have been allocated. This information is conveyed in burst preamble Pe as extended_data_type. The values of Pe shall be as defined

27、in Table 2. Note: SMPTE ST 337 defines the range of Pe as 0x0000 to 0xFFFF. When working in 20 bit or 24 bit mode, this requires that the additional higher significance bits are set to 0. Table 2 Extended Data Types data_type value (hexadecimal) Data type (Common Industry Format Name) SMPTE Defining

28、 Document 0x0000 0x4E1E Reserved by SMPTE for future allocation 0x4E1F Forbidden (to avoid false Pb sync triggering) 0x4E20 0xF871 Reserved by SMPTE for future allocation 0xF872 Forbidden (to avoid false Pa sync triggering) 0xF873 0xFFFF Reserved by SMPTE for future allocation SMPTE ST 338:2015 Page

29、 6 of 6 pages Annex A Bibliography (Informative) SMPTE ST 337:2015, Format for Non-PCM Audio and Data in an AES3 Serial Digital Audio Interface SMPTE ST 339:2015, Format for Non-PCM Audio and Data in AES3 Generic Data Types SMPTE ST 340:2015, Format for Non-PCM Audio and Data in AES3 ATSC A/52 Digit

30、al Audio Compression Standard for AC-3 and Enhanced AC-3 Data Types SMPTE ST 341:2000, Television Format for Non-PCM Audio and Data in AES3 Captioning Data Type SMPTE ST 2041-1:2010, Format for Non-PCM Audio in AES3 MPEG Layer I, II and III Audio SMPTE ST 2041-2:2010, Format for Non-PCM Audio in AES

31、3 MPEG-2 AAC and HE AAC Audio in ADTS SMPTE ST 2041-3:2010, Format for Non-PCM Audio and Data in AES3 MPEG-4 AAC and HE AAC Compressed Digital Audio in ADTS and LATM / LOAS Wrappers SMPTE RDD 33, Format for Non-PCM Audio and Data in AES3 Dolby-E Data Type IEC 61937-2 (2007-5), Digital Audio Interface for Non-Linear PCM Encoded Audio Bitstreams Applying IEC 60958 Part 2: Burst-info