* Technical Summary
This document describes an RTP payload format for transporting
Enhanced AC-3 (E-AC-3) encoded audio data. E-AC-3 is a high
quality, multichannel audio coding format and is an extension of the AC-3
audio coding format, which is used in US HDTV, DVD, cable and
satellite television and other media. E-AC-3 is an optional audio
format in US and world-wide digital television and high definition
DVD formats. The RTP payload format as presented in this document
includes support for data fragmentation.
* Working Group Summary
This is a straight forward RTP payload format, similar to previous
formats. It has been reviewed by the AVT working group, and is not
controversial.
* Protocol Quality
This document was reviewed in detail by Colin Perkins and Magnus
Westerlund.
Note to RFC Editor
In section 7 please replace
Old:
E-AC-3 encoders may use a range of bit rates to encode audio data, so
it is possible to adapt network bandwidth by adjusting the encoder
bit rate in real time or by having multiple copies of content encoded
at different bit rates. Additionally, packing more frames in each
RTP payload can reduce the number of packets sent and hence the
overhead from IP/UDP/RTP headers, at the expense of increased delay
and reduced error robustness against packet losses.
New:
Because it is possible to vary the bit rate used by an E-AC-3 encoder,
it is possible to use a variety of techniques to adapt to network
bandwidth.
IESG Note
(none)