- RF64
RF64 is a BWF-compatible multichannel file format enabling file sizes to exceed 4 Gbyte. It has been specified by the
European Broadcasting Union .The file format is designed to meet the requirements for multichannel sound in broadcasting and audioarchiving. It is based on the Microsoft RIFF/WAVE format and Wave Format Extensible for multichannelparameters. Additions are made to the basic specification to allow for more than 4 Gbyte file sizes whenneeded. The format is transparent to the BWF and all its supplements and chunks.
A maximum of 18 surround channels, stereo downmix channel and bitstream signals with non-PCM coded datacan also be stored in the file format. RF64 can be used in the entire programme chain from capture to editingand play out and for short or long term archiving of multichannel files.
The RF64 file format should fulfil the longer-term need for multichannel sound in broadcasting and archiving.The required effort for software implementers is very small. The changes that will be needed to updateexisting systems will be reasonable in cost.
An RF64 file with a bext chunk becomes an MBWF-file. The terms ‘RF64’ and ‘MBWF’ can then be consideredsynonymous.
ee also
*BWF, Broadcast Wave Format
*WAV References
* [http://www.ebu.ch/CMSimages/en/tec_doc_t3306-2007_tcm6-42570.pdf?display=EN EBU Tech 3306 - RF64: An Extended File Format for Audio] (The RF64 specification)
* [http://www.ebu.ch/CMSimages/en/tec_text_r111-2007_tcm6-12769.pdf EBU Recommendation R111-2007 - Multichannel use of the BWF audio file format (MBWF)]
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