Audio Embedding Errors; Input Audio Rate - Imagine communications Selenio 6800 Installation And Operation Manual

Chapter 3: Operation

Audio Embedding Errors

Input Audio Rate

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Table 3-3 describes Group (1 - 4) Append Embedding Error and
Group (1 - 4) Overwrite Embed Error audio embedding errors (also
see page 56).
Table 3-3. Audio Embedding Error Descriptions
Error Description
Group (1 - 4) Occurs if the embedder is set to Append mode for a
Append particular audio group, but that audio group already exists
Embedding in the incoming SDI signal
Error In this case, the embedder will not embed another audio
data and control packet of the same audio group, as this
will result in incorrect audio sample distribution.
Group (1 - 4) Occurs if the embedder is set to Overwrite mode for a
Overwrite particular audio group, but that audio group does not exist
Embed Error in the incoming SDI signal
To avoid embedding errors, follow these guidelines:
• Set the embedding mode to Auto. If the group is present, it will be
overwritten; if it is not present, it will be appended. The overwrite
and append errors are actually warnings that the desired operation is
not being performed.
• In SD-SDI mode do not overwrite embedded groups of 20-bit audio
samples with groups of 24-bit audio samples. The required
extended data packet information appended to that group may
overwrite a pre-existing audio group. For 24-bit audio embedding,
use the ADS Clean feature provided.
When embedding audio in PCM mode (Audio Ch [1 - 16] Format =
PCM or Audio Ch [1 - 16] Format = Auto and Audio Ch [1 - 16]
Format Feedback = PCM), the input audio sample rate may be from
32 kHz to 96 kHz. This input audio will be sample rate converted to 48
kHz prior to embedding in the HD video signal; as well, the embedder
will indicate 48 kHz in the "Rate" word of the audio control packet for
each embedded audio group.
HMX6800+BC8 Installation and Operation Manual