• Source: Broadcast Wave Format

Broadcast Wave Format (BWF) is an extension of the popular Microsoft WAV audio format and is the recording format of most file-based non-linear digital recorders used for motion picture, radio and television production. It was first specified by the European Broadcasting Union in 1997, and updated in 2001 and 2003. It has been accepted as the ITU recommendation ITU-R BS.1352-3, Annex 1.
The purpose of this file format is the addition of metadata to facilitate the seamless exchange of sound data between different computer platforms and applications. It specifies the format of metadata, allowing audio processing elements to identify themselves, document their activities, and supports timecode to enable synchronization with other recordings. This metadata is stored as extension chunks in a standard digital audio WAV file.
BWF is the recommended format for digitizing sound files by the International Association of Sound and Audiovisual Archives.
Files conforming to the Broadcast Wave specification have names ending with the filename extension .WAV.




Details


In addition to the common WAVE chunks, the following extension chunks can appear in a Broadcast Wave file:

Original Bext chunk (Broadcast Extension - 'bext')
iXML chunk ('iXML')
Quality chunk ('qlty')
MPEG audio extension chunk ('mext')
Peak Envelope chunk ('levl')
link chunk ('link')
axml chunk ('axml')
Since the only difference between a BWF and a "normal" WAV is the extended information in the file header (Bext-Chunk, Coding-History, etc...), a BWF does not require a special player for playback.
Unfortunately, this compatibility also preserves the filesize limitation that WAV files have (4 GB of audio data per data chunk).
In order to be able to store audio which would exceed this limit, 2 different chunks exist allowing the audio material to be spread across several files: cont & link (see list above)
Since there is no official naming convention for these subsequent files, and it is still desirable to see at a glance which ones belong to a continuous piece of audio, a lot of programs apply a numbering scheme to the file suffix: .wav, .w01, .w02, ..., .wNN.
Each of those segments is a regular Wave/BWF file, but players that are aware of the continue/link chunk will treat all segments as one single, long piece of audio when opening the first segment ".wav".
As an extension, RF64 is a BWF-compatible multichannel file format enabling file sizes to exceed 4 GB that has been specified in 2006.
The axml (additional XML) chunk allows users to incorporate data compliant with the XML format with the audio; the chunk may contain data fragments from one or more schema.
In August 2012, the European Broadcasting Union published a specification for embedding International Standard Recording Code (ISRC) in the axml chunk of the Broadcast Wave Format.
BWF is specified for use in MXF by SMPTE standard 382. BWF is specified for use in AES31.




See also


RF64, A BWF-compatible multichannel file format enabling file sizes to exceed 4 GB
WAV
MXF, Material eXchange Format
Advanced Authoring Format




References






External links


EBU Tech 3285-s1 - Specification of the Broadcast Wave Format (BWF) - Supplement 1, MPEG Audio - first edition (1997)
EBU Tech 3285 - Specification of the Broadcast Wave Format (BWF) - Version 1 - second edition (2001)
EBU Tech 3285-s2 - Specification of the Broadcast Wave Format (BWF) - Supplement 2, Capturing Report - first edition (2001)
EBU Tech 3285-s3 - Specification of the Broadcast Wave Format (BWF) - Supplement 3, Peak Envelope Chunk - first edition (2001)
EBU Tech 3285-s4 - Specification of the Broadcast Wave Format (BWF) - Supplement 4, Link Chunk - first edition (2003)
EBU Tech 3285-s5 - Specification of the Broadcast Wave Format (BWF) - Supplement 5, Chunk - first edition (2003)
EBU Tech 3352 - The Carriage of Identifiers in the Broadcast Wave Format (BWF) (2012 Recommendation)
EBU Tech 3285-s6 - Specification of the Broadcast Wave Format (BWF) - Supplement 6, Dolby Metadata - Chunk - first edition (2009)

Kata Kunci Pencarian:

• Format berkas audio
• Ateez
• WhatsApp
• Haha (entertainer)
• Daftar stasiun radio di California
• Lee Min-ho (pemeran)
• Miami Vice
• USA for Indonesia
• The Big Bang Theory
• Daftar stasiun radio di Alaska
• Broadcast Wave Format
• Broadcast Exchange Format
• WAV
• Audio file format
• Advanced Authoring Format
• Material Exchange Format
• Resource Interchange File Format
• List of file formats
• RF64
• Hits Radio South Wales