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How is a multiligual object encoded in an AAC stream?
encai
post Mar 19 2002, 03:45
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I have read a draft of iso13818-7, and have no idea about it.
any reply will be appreciated.
thanks.
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encai
post Mar 19 2002, 10:09
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QUOTE
Originally posted by encai
I have read a draft of iso13818-7, and have no idea about it.
any reply will be appreciated.
thanks.


woo... Nobody answers...
What I want to ask is about dual mono object.
will a dual mono object will be encoded as two SCE,
or one CPE, or one SCE with one CCE?

SCE ---- single_channel_element
CPE ---- channel_pair_element
CCE ---- coupling_channel_element.

regards
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Ivan Dimkovic
post Mar 19 2002, 12:42
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The best thing is to encode dual mono as two separate SCE, or in some circumstances as one CPE - but with disabled M/S, IS and other joint channel tools.

CCE is used for multichannel encoding.
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menno
post Mar 19 2002, 17:20
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The multilingual part is encoded using a coupling channel, which are mixed in a normal channel (SCE or both channels of a CPE). This means that you can for example encode 10 CCE's in 10 different languages and chose which one to mix into the audio channel. Hence, you'll have a multi language audio.
But from your second post I guess that that is not really your question. Dual mono can be encoded using a CPE with common_window = 0, this assures that both channels are encoded completely seperate, but the decoder will know that the channels belong together.

Menno
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