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
2、 any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional righ
3、ts to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction rservs. Sauf indication contraire, aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun pro
4、cd, lectronique ou mcanique, y compris la photocopie et les microfilms, sans laccord crit de la CEI ou du Comit national de la CEI du pays du demandeur. Si vous avez des questions sur le copyright de la CEI ou si vous dsirez obtenir des droits supplmentaires sur cette publication, utilisez les coord
5、onnes ci-aprs ou contactez le Comit national de la CEI de votre pays de rsidence. IEC Central Office 3, rue de Varemb CH-1211 Geneva 20 Switzerland Email: inmailiec.ch Web: www.iec.ch About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please ma
6、ke sure that you have the latest edition, a corrigenda or an amendment might have been published. Catalogue of IEC publications: www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,). It also gives information on
7、projects, withdrawn and replaced publications. IEC Just Published: www.iec.ch/online_news/justpub Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available on-line and also by email. Electropedia: www.electropedia.org The worlds leadin
8、g online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabulary online. Customer Service Centre: www.iec.ch/webstore/custserv If
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
18、IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are ac
19、cepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote internat
20、ional uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the
21、latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users s
22、hould ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other d
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
