Imagine communications Selenio 6800 SFS6803+OP+SFS+, Инструкция по установке и эксплуатации

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Chapter 3
Operation
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Figure 3-5 Append Embedding Mode, Adding Group 2 Following Group 1
An audio group cannot be divided. In Append embedding, the audio group is always added
following the last block in the ADS. If there is not enough room to append the audio group
following the last block of auxiliary data or audio in the ADS, the attempt results in an error,
as shown in
Figure 3-6 .
Figure 3-6 Append Embedding Mode Returns Error When Auxiliary Data Exists in all Audio
Groups
Overwrite Embedding
When you select Overwrite embedding, the module attempts to overwrite any existing
audio data and control packets of the same group number with the new audio data. This
setting is valid only if the audio group to be embedded already exists. If the new sample
distribution does not exactly match the existing audio data packet sample distribution, the
embedder marks some audio data packets for deletion (DID word is set to 180h).
Note: To avoid sample distribution issues, activate the ADS Clean feature (see ADS Clean
Parameter on page 43).
When you attempt Overwrite embedding and there is no previous audio (as in Figure 3-7 ),
it returns an error because there is nothing to overwrite.
Figure 3-7 Overwrite Embedding Mode When There is No Pre-existing Audio
ADS before embedding
EAV
Group 2
ADS after embedding group 1
Group 1
EAV
Group 2
ADS before embedding
EAV
Other
auxillary
data
Other
auxillary
data
Other
auxillary
data
ADS after attempting to embed group 1
EAV
Result: Error is returned
Other
auxillary
data
Other
auxillary
data
Other
auxillary
data
ADS before embedding
EAV
EAV
ADS after attempting to embed group 1
Result: Error is returned