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AES31-2-Am1-2008: Amendment 1 to AES31-2 - Audio-file transfer and exchange - Part 2: File Format for Transferring Digital Audio Data Between Systems of Different Type and Manufacture - Extended file format for audio to exceed 4 GByte

Printing Date: 2009-02-16

Publication History: Published 2008; Superseded 2012

Abstract: The 32-bit address space of a Wave file limits its maximum size to 4 GB. Some practical computer systems may impose a lower limit of 2 GB. This is not a significant obstacle for mono files at basic rate sampling frequencies, but the limitation becomes increasingly significant as the number of channels in the file is increased or when double- or quadruple-rate sampling frequencies are used. The Extended Broadcast Wave Format (BWF-E) file format described in this amendment is designed to be a compatible extension of the Broadcast Wave Format (BWF) already defined in AES31-2. It extends the maximum size capabilities of the RIFF/WAVE format by increasing its address space to 64 bits where necessary. BWF-E is also designed to be mutually compatible with the EBU T3306 "RF64" extended format.

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