To SIP & SDP experts,
Iam having some doubts in RFC4566 (i.e
SDP)could you please explain them briefly
RFC 4566 PAGE 14
Hierarchical or layered encoding schemes are data streams where the encoding
from a single media source is split into a number of layers.
As per my understanding the above line says that (Trade off between
bandwidth and quality )
Ex : I have a media file of 1 GB size .If I use layered encoding that 1 GB
media file could be made into 700k size with some loss of date or 500k
size or 1GB only as per users choice?
Such layered encodings are normally transmitted in multiple multicast groups
to allow multicast pruning
How would I know which layer is mapped to which multicast address (and size
of each layer)?..
I think this issue is addressed by the protocol above SDP (i.e in SIP or
SAP)?.. Could anyone plz let me know .How and where this issue is addressed
Thanks and Regards,
Avinash Koneru
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