Copyrighted material licensed to BR Demo by Thomson Reuters ( - 8 - TR62712@IEC:2011(E) Table3-AudiocodecforPRODUCT-D Compressionformat Referred standard PRODUCT-D AC-3 ATSC A/52B 2.3 File format As a file format, MXF(Material eXchangeFormat)defined as SMPTE Estandard isadopted 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 (Scientific), Inc., Pattern-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 otherhand,OP-Atom is used for wrapping g video and audio in individual files to facilitate contents editing. , subscriptions.techstreet.com, downloaded on Nov-28-2014 by James Madison. No further reproduction or distribution is permitted. Uncontrolled when print NOTE MXF standards are under revision in SMPTE and, in parallel, also under study for standardization in the IEC TC1oo/TA6 working group. Since it is confirmed that the MxF specification has been adopted for various 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. Table4-MXFbasedPRODUCTlist File format Referred standard SMPTE ST 377-1, PRODUCT-A SMPTE ST 378, PRODUCT-F MXF OP-1a SMPTE ST 379-2, SMPTE ST 380, PRODUCT-H SMPTE ST 381, etc SMPTE ST 377-1, PRODUCT-C SMPTE ST 379-2, SMPTE ST 381, MXF OP-Atom SMPTE ST 382, PRODUCT-E SMPTE ST 383. SMPTE ST 390, etc NOTE E SMPTE 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/lECstandardwhichcanbereferredtoasanormativereference Table5-Fileformat ofPRODUCT-B andPRODUCT-G File format Referred standard PRODUCT-B ISO/IEC 14496-12 MP4 ISO/IEC 14496-14 PRODUCT-G The file formats listed in Table 6 are not defined in any standards' bodies. PRODUCT-B and ed TR62712@IEC:2011(E) -9 Although both specifications are not standardized, they are generally disclosed and support varioustypesofcodecandmetadata. These file formats are widely supported in the IT industry and considered to ensure compatibility with this type of equipment. In addition, it is known that QuickTime file format is the basis for the MP4 fie format. Table6-Fileformat of PRODUCT-BandPRODUCT-G File format Referred standard Reuters PRODUCT-B AVI Type2 not standardized PRODUCT-G PRODUCT-G QuickTime not standardized As listed inTable7,PRODUCT-Dadopts MPEG-2TS(Transport Stream)as a container of contents.Although MPEG-2TS specification is defined in ISO/IEC 13818-1, actually MPEG-2 Ts is not a file wrapper but a streamdefinition. Table7-Fileformat of PRODUCT-D File format Referred standard PRODUCT-D MPEG-2 TS file ISO/IEC 13818-1 2.4 Metadata on Metadata is classified as technical metadata and descriptive metadata. The technical metadata is essential data in order to play back video and audio essences. The descriptive metadata provides additional information of the shooting contents. There are two types of encoding of metadata, the determined data specification defined in each supported file format and the proprietary data specification depending on each manufacturer's PRODUcT The technical metadata is defined in each fileformat specification such as MxF or MP4.Since each PRODUCT supports technical information (in case of MXF,defined as the MXF Structural metadata) required to play back video and audio e