Cobalt Digital COMPASS 9322 HD_SD De-Embedder - Manual (Page 19)

9323G-OM (V4.6) 9323 GROUP PRODUCT MANUAL 1-15
Introduction
932X Functional Description
Zero-Delay Audio Embedding
In cases where additional delay must be avoided, it may be desirable to embed
AES with minimum latency. Using zero-delay embedding, the video can then
be delayed by one frame to account for any remaining audio delay. In this
manner, any delay between video and audio can be cleanly contained and
managed within one frame period.
When zero-delay audio embedding is enabled for a given AES pair, the pair is
directly embedded into its corresponding group (for example, AES Pair 1 into
embedded channels 1 and 2; AES Pair 2 into embedded channels 3 and 4, and
so on) with the normal frame sync audio delay being bypassed.
This function overrides the audio routing system (for example if AES Pair 1 is
selected, then the controls to route AES Pair 1 into other embedded channels
will not apply). Gain and polarity control is not available when this option is
selected. Zero-delay audio embedding is set to Off by default.
Low-Latency AES Passthrough
This function is similar to zero-delay audio embedding. If low-latency AES
passthrough is selected for a given input pair, it causes the corresponding
AES output pair to act as a bit-for-bit copy of the corresponding AES input
pair. This control overrides the normal audio routing and delay. Gain and
polarity control is not available when this option is selected. Passthrough is
set to Off by default.
Dolby ® Decoding Option (+DEC)
Note: Although the +DEC Dolby ® decoder-equipped cards can provide Dolby ® Digi-
tal™ (AC-3) decoding, discussion and examples here describe only Dolby ® E
decoding.
When Dolby ® E or Dolby ® Digital™ is present on a discrete AES pair or an
embedded audio pair, the decoder produces up to 10 decoded channels
(according to the Dolby
® sub-format received from the metadata). All
resulting channels are available as inputs to the audio router.