I have been selected as the General Area Review Team (Gen-ART) reviewer
for this draft (for background on Gen-ART, please see
http://www.alvestrand.no/ietf/gen/art/gen-art-FAQ.html).
Please resolve these comments along with any other Last Call comments
you may receive.
Document: draft-ietf-avt-rtp-jpeg2000-18.txt
Reviewer: Brian Carpenter
Review Date: 2008-03-03
IETF LC End Date: 2008-03-15
IESG Telechat date: (if known)
Summary: Almost ready.
Comments:
Is [11] really only an informative reference?
" * Priority importance of the packet using methods described in
RFC XXXX [11].
* Main header recovery using methods described in RFC XXXX [11].
Additional usage of the payload header is described in RFC XXXX
[11]. "
" mh_id (Main Header Identification) : 3 bits
Main header identification value. This is used for JPEG 2000 main
header recovery.
For implementations following only this specification, the sender
SHOULD set this value to 0 and the receiver SHOULD ignore this
field on processing.
Additional usage of this header is described in further detail in
supplmental RFC draft: RTP Payload format for JPEG 2000:
Extensions for Scalability and Main Header Recovery. Please
consult RFC XXXX [11] "
These look like technical dependencies to me, especially the main header
recovery, since we also find "If the main header is lost, the image cannot
be decoded." Even though this is an optional feature, it is still a
normative dependency.
" 6. Security Consideration
...
Note that the appropriate mechanism to provide security to RTP and
payloads following this memo may vary. It is dependent on the
application, the transport, and the signalling protocol employed.
Therefore a single mechanism is not sufficient, although if suitable
the usage of SRTP [4] is recommended. Other mechanism that may be
used are IPsec [12] and TLS [13] (RTP over TCP), but also other
alternatives may exist. "
I think this needs to be clearer with respect to the BCP 61 (RFC 3365)
requirement. What is the required minimum security?
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