Imagine Selenio X100, Инструкция по установке и эксплуатации

Страница: 90 / 178

Selenio X100
Installation and Operation Manual
78
Overwrite Embedding
When you select Overwrite embedding, the X100 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 problems, activate the ADS Clean feature in the Audio
Embedding > Embedding 1 > Control .
When you attempt Overwrite embedding and there is no previous audio (as in
Figure 3-27 ), it returns an error because there is nothing to overwrite.
Figure 3-27 Overwrite Embedding Mode When There is No Pre-existing Audio
Figure shows how overwrite embedding appears in the ancillary data space when there is
ancillary data but no pre-existing group 1 audio.
Figure 3-28 Overwrite Embedding Mode Failure
Figure 3-29 shows how overwrite embedding appears in the ancillary data space when
there is pre-existing Group 1 audio. This operation is successful.
Figure 3-29 Overwrite Embedding Mode When There is Group 1 Audio in the
Group 1 Space
ADS before embedding
EAV
EAV
ADS after attempting to embed group 1
Result : Error is returned
EAV
ADS before embedding
A B
ADS after attempting to embed group 1
EAV
A B
Error is returned
Other
Ancillary Data
Other
Ancillary Data
Other
Ancillary Data
Other
Ancillary Data
Result :
ADS after embedding group 1
EAV
ADS before embedding
EAV Pre-existing Group 1
(with overwrite group specified as Group 1)
Group 1