AES53
Encyclopedia
AES53 is a standard first published in October 2006 by the Audio Engineering Society
Audio Engineering Society
Established in 1948, the Audio Engineering Society draws its membership from amongst engineers, scientists, other individuals with an interest or involvement in the professional audio industry. The membership largely comprises engineers developing devices or products for audio, and persons working...

  that specifies how the timing markers specified in AES47
AES47
AES47 describes a standardised method for packing AES3 professional digital audio streams over Asynchronous Transfer Mode networks. The AES47 method is published by the International Electrotechnical Commission as IEC 62365.-Introduction:...

 may be used to associate an absolute time-stamp with individual audio samples. AES47
AES47
AES47 describes a standardised method for packing AES3 professional digital audio streams over Asynchronous Transfer Mode networks. The AES47 method is published by the International Electrotechnical Commission as IEC 62365.-Introduction:...

 specifies a format for the transmission of digital audio over asynchronous transfer mode
Asynchronous Transfer Mode
Asynchronous Transfer Mode is a standard switching technique designed to unify telecommunication and computer networks. It uses asynchronous time-division multiplexing, and it encodes data into small, fixed-sized cells. This differs from approaches such as the Internet Protocol or Ethernet that...

 (ATM) networks. A recommendation is made to refer these timestamps to the SMPTE epoch which in turn provides a reference to UTC and GPS time. It thus provides a way of aligning streams from disparate sources, including synchronizing audio to video, and also allows the total delay across a network to be controlled when the transit time of individual cells is unknown. This is most effective in systems where the audio is aligned with an absolute time reference such as GPS, but can also be used with a local reference.

This standard may be studied by downloading a copy of the latest version from the AES standards web site as AES53-2006.
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