Embedder - De-Embedder / Mux - De-Mux

Standard SMPTE 299M, up to 16 channels of digital audio signals (eight AES-3 streams), 24bit, can be inserted into the SDI bitstream. The 16 channels are allocated in four groups of four audio channels. Each group consists of two AES-3 channels (four audio channels).

Embedder: inputs matrixed and embedded
into 8 AES-3 streams (16x audio)
De-Embedder: channels extracted
from 8 AES-3 streams (16x audio)

example for typical audio transport on an SDI video stream, signals can be extracted repeatedly

example for possible insertion and extraction of audio channels in one SDI video stream,
embedded audio can be used for independent transport ('hopping' on and off)