IEC TR 62712-2011 Professional tape-less camera recorder《专业无磁带摄影机》.pdf

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1、 IEC/TR 62712 Edition 1.0 2011-10 TECHNICAL REPORT Professional tape-less camera recorder IEC/TR 62712:2011(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2011 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in

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9、you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC/TR 62712 Edition 1.0 2011-10 TECHNICAL REPORT Professional tape-less camera recorder INTERNA

10、TIONAL ELECTROTECHNICAL COMMISSION T ICS 33.160.40 PRICE CODE ISBN 978-2-88912-764-1 Registered trademark of the International Electrotechnical Commission 2 TR 62712 IEC:2011(E) CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope . 6 2 Result of product survey . 6 2.1 General . 6 2.2 Codec . 6 2.2.1 Vide

11、o codec 6 2.2.2 Audio codec 7 2.3 File format . 8 2.4 Metadata . 9 2.5 Recording media . 10 2.6 Interface 11 3 Guideline for standardization 12 3.1 Summary of current issues 12 3.2 Proposed guideline for standardization 12 3.2.1 Product based standardization. 12 3.2.2 Essence technology based standa

12、rdization . 12 4 Conclusion . 14 Annex A PRODUCT list 15 Bibliography 23 Table 1 Video codec 7 Table 2 Audio codec 7 Table 3 Audio codec for PRODUCT-D 8 Table 4 MXF based PRODUCT list 8 Table 5 File format of PRODUCT-B and PRODUCT-G . 8 Table 6 File format of PRODUCT-B and PRODUCT-G . 9 Table 7 File

13、 format of PRODUCT-D . 9 Table 8 Metadata specification examples of MXF based camera recorder 10 Table 9 Proprietary recording media 10 Table 10 Non proprietary recording media . 11 Table 11 Interface specification-1 11 Table 12 Interface specification-2 11 Table 13 PRODUCT list based on MXF and oth

14、er related technologies 13 TR 62712 IEC:2011(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PROFESSIONAL TAPE-LESS CAMERA RECORDER FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IE

15、C National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

16、 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-

17、governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of

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23、amage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses 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

24、of the referenced publications is indispensable for the correct application of this publication. 9) Attention 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 ri

25、ghts. The main task of IEC technical committees is to prepare International Standards. However, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “stat

26、e of the art“. IEC 62712, which is a technical report, has been prepared by technical area 6: Storage media, data structures, equipment and systems, of IEC technical committee 100: Audio, video and multimedia systems and equipment. The text of this technical report is based on the following document

27、s: Enquiry draft Report on voting 100/1781/DTR 100/1839/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. 4 TR 62712 IEC:2011(E) This publication has been drafted in accordance with the ISO/IEC Directives,

28、Part 2. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced b

29、y a revised edition, or amended. TR 62712 IEC:2011(E) 5 INTRODUCTION During the last few years, various types of tape-less camera recorders with different formats have emerged to the broadcast and professional video market. It is desirable to ensure interoperability and to establish its operation. T

30、he stage 0 project “Professional tape-less camera recorder” was established to meet these requirements and the purpose of this project was to study the possibility of standardization of this type of products in the current market. The initial step of study was to understand the current status of the

31、 products in the market. (Performance comparison is out of the scope of this Technical Report.) This Technical Report was created as a summary of the project and includes the result of the product survey along with the possibility of standardization. Although the investigation is limited to the prod

32、ucts in the market, it does not obstruct or exclude standardization of future products. 6 TR 62712 IEC:2011(E) PROFESSIONAL TAPE-LESS CAMERA RECORDER 1 Scope This Technical Report summarizes the results of the study on products and market status of professional tape-less camera recorders. This repor

33、t also includes the guideline on the possibilities of standardizations for professional tape-less camera recorders, including the following components: codec; file format; metadata; recording media; interface. NOTE 1 Each professional tape-less camera recorder used for the product survey is defined

34、as “PRODUCT”. NOTE 2 Since each PRODUCT is also defined as a “product series” of each manufacturer, PRODUCT may include two or more models with different product specifications. NOTE 3 Some of the names described in this report represent a trademark or registered trademark of the respective companie

35、s. However, symbols such as TM and are omitted in this report. NOTE 4 The interface specifications investigated in this project were limited to a file transfer or compressed bit stream transfer since this report is focusing on a file-based specification. NOTE 5 The detail specification of each PRODU

36、CT is shown in Annex A. 2 Result of product survey 2.1 General In this report, eight types of PRODUCTs for investigation are listed, based on the information given by camera recorder manufacturers. 2.2 Codec 2.2.1 Video codec Each PRODUCT uses efficient video compression formats such as MPEG-2, MPEG

37、-4 AVC/H.264, JPEG2000 and DV. Since these specifications are defined as international standards of ISO/IEC, they can be referred to as a normative reference. The video compression format of PRODUCT-C is defined as SMPTE standard and is also defined as an IEC standard for digital VTR format. It can

38、therefore also be referred to as a normative reference. Since all the compression formats listed in Table 1 are a well-known codec scheme and widely supported in industry, compatibility is ensured with equipment other than camera recorders. TR 62712 IEC:2011(E) 7 Table 1 Video codec Compression form

39、at Referred standard PRODUCT-A MPEG-2 HD ISO/IEC 13818-2 PRODUCT-B PRODUCT-E PRODUCT-F PRODUCT-G PRODUCT-H PRODUCT-A MPEG-2 SD ISO/IEC 13818-2 PRODUCT-E PRODUCT-F PRODUCT-C MPEG-4 AVC / H.264 ISO/IEC 14496-10 PRODUCT-D PRODUCT-F JPEG2000 ISO/IEC 15444-1 PRODUCT-A DV IEC 61834-2 PRODUCT-B PRODUCT-F P

40、RODUCT-G PRODUCT-C DV Based 100Mbps SMPTE ST 370 (IEC 62447-2) DV Based 50Mbps SMPTE ST 314 (IEC 62071-2) 2.2.2 Audio codec It is characterized that almost all PRODUCTs listed in Table 2 use uncompressed linear PCM audio for audio codec. Altough a linear PCM specification is not defined in any publi

41、shed standard, linear PCM is also widely supported in many products and compatibility is ensured as well as video codec. Table 2 Audio codec Compression format Referred standard PRODUCT-A Linear PCM - PRODUCT-B PRODUCT-C PRODUCT-E PRODUCT-F PRODUCT-G PRODUCT-H As listed in Table 3, PRODUCT-D uses AC

42、-3 format defined in the ATSC standard which cannot be referred to as a normative reference. 8 TR 62712 IEC:2011(E) Table 3 Audio codec for PRODUCT-D Compression format Referred standard PRODUCT-D AC-3 ATSC A/52B 2.3 File format As a file format, MXF (Material eXchange Format) defined as SMPTE stand

43、ard is adopted in the PRODUCT listed in Table 4. In order to ensure operational compatibility, several kinds of Operational Patterns are defined in the MXF specification. It is characterized that the camera recorders supporting MXF adopt OP-1a (Operational Pattern-1a) or OP-Atom (Operational Pattern

44、-Atom). In case of shooting materials by a camera recorder, since each taken material is wrapped in an individual clip as file, complex operational patterns are not required. OP-1a is used for wrapping video and audio to a single file to facilitate contents exchange. On the other hand, OP-Atom is us

45、ed for wrapping video and audio in individual files to facilitate contents editing. NOTE MXF standards are under revision in SMPTE and, in parallel, also under study for standardization in the IEC TC100/TA6 working group. Since it is confirmed that the MXF specification has been adopted for various

46、types of PRODUCTs, it would be significant to standardize MXF as an IEC standard in order to ensure compatibility among different types of equipment. Therefore, it is desirable to start studying standardization in IEC when primary MXF revision projects in SMPTE finish the revision work. Table 4 MXF

47、based PRODUCT list File format Referred standard PRODUCT-A MXF OP-1a SMPTE ST 377-1, SMPTE ST 378, SMPTE ST 379-2, SMPTE ST 380, SMPTE ST 381, etc PRODUCT-F PRODUCT-H PRODUCT-C MXF OP-Atom SMPTE ST 377-1, SMPTE ST 379-2, SMPTE ST 381, SMPTE ST 382, SMPTE ST 383, SMPTE ST 390, etc PRODUCT-E NOTE SMPT

48、E 377-1/379-2 is a revision of 377M-2004/379-1 that supersedes the previous 377M-2004/379-1. Existing equipment in the market may still reference the older version. As listed in Table 5, PRODUCT-B and PRODUCT-G adopt the MP4 file format defined as ISO/IEC standard which can be referred to as a norma

49、tive reference. Table 5 File format of PRODUCT-B and PRODUCT-G File format Referred standard PRODUCT-B MP4 ISO/IEC 14496-12 ISO/IEC 14496-14 PRODUCT-G The file formats listed in Table 6 are not defined in any standards bodies. PRODUCT-B and PRODUCT-G adopt AVI Type 2 file format and PRODUCT-G adopts QuickTime file format. TR 62712 IEC:2011(E) 9 Although both specifications are not standardized, they are generally disclosed and support vari