Subject: [codec] discussion topics pt 2

From: Michael Knappe <[email-masked]>
Date: Fri, 9 Jul 2010 09:11:13 -0700

Everyone,

Below is a raw list of open tracker item titles, taken from

http://trac.tools.ietf.org/wg/codec/trac/report/1

Please take some time and review each entry on the tracker to get a contextual view of where current discussion is on various topics. Some tracker items should be closed as either an obvious non-requirement or out of scope to the charter, and some need further clarification and discussion before any consensus can be derived – we’ll do some cleanup once everyone has had a few days to review where we are.

Cheers,

Mike

2. Please identify Requirements non-ambiguous and give them priorities
3. Conferencing: Support of binaural audio?
4. Remove the word "wideband" from the WG title. [MEK] It appears consensus was leaning towards ‘Internet Interactive Audio Codec’ in place of the current ‘Internet Wideband Audio Codec’
7. Providing DTMF Testing Tools and Samples
8. Sample rates?
9. Joint stereo/channel coding?
10. Multi-channel frame ordering?
12. bit-exact vs. bit-compatible?
13. reference use-cases and topologies
14. VAD and CNG?
15. Efficiently combine pre-encoded audio
17. Feedback and control loop?  [MEK] this was a rate control discussion
18. Frame Sizes?
19. How large is the frame size depended delay / the serialization delay / frame size depended processing delay?
20. Computational complexity?
21. Supporting Wireless Links? [MEK] a non-requirement?
22. Memory Usage?
23. Impact of packet headers and header compression
24. Negotiation of codec parameters?
25. Supported audio contents [MEK] this is a discussion of how general purpose the codec should be in terms of supporting voice, music, etc. We may want to further refine this question to be: will ALL variants / sample rates of the codec support general audio content, or will it be ok for some variants to be content-optimized?
26. Comparing the CODEC to other codecs...
27. Testing Impact of IP on Codec Performance
28. Layered bit-stream
29. Packet loss concealment?
30. Self-awareness [MEK] this is a quality-feedback loop discussion, similar to item 17.
31. Requirements of high-density VoIP gateways (and low cost VoIP phone)?
32. Playout/Dejittering Buffer
34. Speech Quality Aspects in emergency calls