IEC 62942-2019 pdf free.File format for professional transfer and exchange of digital audio data.
This document specifies a file format for interchanging audio data between compliantequipment. lt is primarily intended for audio applications in professional recording, production,post-production, and archiving.
lt is derived from the AES31-2[2] but is also compatible with variant specifications includingEBU Tech 3285 [3] to [10],ITU-R BR.1352-3-2007 [11] to [14], and the Japan Post ProductionAssociation’s BWF-J [15].
This document contains the specification of the broadcast audio extension chunk and its usewith PCM-coded audio data.Basic information on the RIFF format and how it can be extendedto other types of audio data is given in Annex E.Details of the PCM WAVE format are alsogiven in Annex A.
An optional extended format,BWF-E，supports 64-bit addressing to permit file sizes greaterthan 4 GB.
2Normative references
The following documents are referred to in the text in such a way that some or all of theircontent constitutes requirements of this document. For dated references,only the editioncited applies.For undated references, the latest edition of the referenced document (includingany amendments) applies.
ISO/IEC 10646:2017,Information technology – Universal Coded Character Set (ucs)
ISO 8601,Data elements and interchange formats – Information interchangeRepresentation of dates and times
SMPTE ST 330-2011; SMPTE standard for television – Unique Material Identifier (UMID)
INTERNET ENGINEERING TASK FORCE (IETF).RFC 3629:UTF-8,a transformation formatof lSO 10646 [online].Edited by F.Yergeau. November 2003 [viewed 2019-11-26]. Availableat https://www.rfc-editor.org/rfc/rfc3629.txt.
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISo and lEC maintain terminological databases for use in standardization at the followingaddresses:
IEC Electropedia: available at http://www.electropedia.org/
ISO Online browsing platform: available at http://www.iso.org/obp
4.6 Channel usage Audio files are typically mono (1-channel) or stereo (2-channel). For multi-channel usage inBroadcast Wave format files, see Annex D.
4.7File size The 32-bit address space of a WAVE file limits its maximum size to 4 GB.Some practicalcomputer systems may impose a lower limit of 2 GB.For larger file sizes,Annex F describesan extended file format,BWF-E.IEC 62942 pdf download.