[M4IF Technotes] =?gb2312?B?UmU6IFtNNElGIFRlY2hub3Rlc10gVGVjaG5pY2FsIHF1ZXN0aW9uIGNvbmNlcm5pbmcgQklG

[fano.ge]

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> Hello all,
> 
> I have one more technical question concerning MPEG-4 which I do not find
> immediately an answer to in the MPEG-4 documents I posses.
> 
> Is it correct to say that the BIFS description is stored in a seperate
> elementary stream. This stream is then combined with the other
> elementary streams.
In general,the scene descriptions are encoded as streams called BIFS and OD stre
am,the later contains the Object Descriptors in the scene and through it BIFS can combined with other elementary streams to reconstruct the presentation.
> Would it be possible to send this BIFS-stream in advance through a
> network and then combine the BIFS-stream with the other data on the
> moment of playback. Would this theoretically be possible or can it
> (nowadays) be done in real live applications ?
first the initial BIFS scene is sent as a BIFS-Command ,later other BIFS-Command
s will be sent when the scenes is changing.
> 
> Thank you very much for any answers,
> 
> Boris Rogge

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