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AES3-2009 (r2019): AES standard for digital audio engineering - Serial transmission format for two-channel linearly represented digital audio data

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AES3-2009 (r2019): AES standard for digital audio engineering - Serial transmission format for two-channel linearly represented digital audio data
Printing Date: 2015-01-09
Publication History: Pub. 1985; Rev. 1992; Am.1 1997; Am.2 1998; Am.3 1999; Am.4 1999; Rev. 2003; Am.5 2008; Am.6 2008; Rev. 2009; Reaffirmed 2014; Reaffirmed 2019
Abstract: AES3 provides for the serial digital transmission of two channels of periodically sampled and uniformly quantized audio signals on various media. This revision comprises four parts - also available separately - and includes all amendments prior to 2009.

Part 1 specifies the semantics of the audio data, including the "validity" flag. It also specifies the sampling frequency by reference to AES5, AES recommended practice for professional digital audio - Preferred sampling frequencies for applications employing pulse-code modulation.

Part 2 specifies the information transmitted with the audio data: principally the "channel status" but also user data and the use of the auxiliary bits to carry a co-ordination signal.

Part 3 specifies the framing and channel coding for transmission on a unidirectional point-to-point physical link. The specified format minimizes the direct-current (DC) component on the transmission line, facilitates clock recovery from the data stream, and makes the interface insensitive to the polarity of connections.

Part 4 specifies the physical signals that convey the bit stream specified in Part 3. The current version covers electrical signals on twisted-pair and co-axial cables. Other media, including fibre optic, are under consideration.

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