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AES-X162 Initiation
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[page updated 2007-12-17]
This project was proposed by Mark Yonge, chair of working group SC-02-08. It was approved under our rules by Subcommittee SC-02 and assigned to the SC-02-08 Working Group on Audio-File Transfer and Exchange.
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TITLE
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AES-X162, Amendment to AES31-2, File-size extension using the "RF64" technique
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SCOPE
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This amendment to AES31-2 provides a method of extending audio files beyond the limits set by the RIFF Wave format. It uses the "RF64" technique to permit 64-bit file addressing to accommodate longer recording times and multiple channels in a single file.
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OUTPUT INTENT
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Amendment to standard
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RATIONALE
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The methodology is based on three assumptions:
The current AES31-2 is based on RIFF Wave files which have a maximum file-size limit of 2 GB (or 1 GB, depending on computer operating-system implementation). The RF64 technique will permit arbitrarily large file sizes while maintaining backward compatibility for files smaller that, say, 1 GB. This technique has been adopted by the EBU and is in active use.
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WHO BENEFITS?
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All users of recorded digital audio in file format.
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WHY AES?
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AES members have the necessary expertise, and already publishes the parent AES31-2 standard.
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(C) 2009, Audio Engineering Society, Inc.
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