SMPTE 299M-2004

This standard defines the mapping of 24-bit AES digital audio data and associated control information into the ancillary data space of a serial digital video conforming to SMPTE 292M. The audio data are derived from AES3, hereafter referred to as AES audio. The AES audio data may contain linear PCM audio or non-PCM data formatted according to SMPTE 337M. 1.2 Audio sampled at a clock frequency of 48 kHz locked (synchronous) to video, is the preferred implementation for intrastudio applications. As an option, this standard supports AES audio at synchronous or asynchronous sampling rates from 32 kHz to 48 kHz. 1.3 Audio channels are transmitted in groups of four, up to a maximum of 16 audio channels. Each group is identified by a unique ancillary data ID. 1.4 Audio data packets are multiplexed (embedded) into the horizontal ancillary data space of the Cb/Cr data stream, and audio control packets are multiplexed into the horizontal ancillary data space of the Y data stream.