[AVT] new MWPP I-D ...

[John Lazzaro <lazzaro@CS.Berkeley.EDU>]

Hi everyone,

	Just submitted the -05.txt draft for MWPP:

http://www.cs.berkeley.edu/~lazzaro/sa/pubs/txt/current-mwpp.txt

	The change log is 3 pages long, so I won't summarize the
additions here. The road ahead for MWPP:

  [1] Write the first draft of the BCP for sending and receiving
      MWPP RTP streams, hopefully in time for the Atlanta deadline
      (although this may be an optimistic schedule). Should this
      be an individual submission, or an WG item?

  [2] Revisit a few "big ticket" requests folks have made for 
      features in MWPP, that I've deferred for further research:

        -- The MWPP "recovery journal" is true to its name: it's
           a shallow, sketchy history for recovery, not the deep
           complete history of the recent past that classical
           redundancy schemes (RFC 2198, RFC 2733) offer. It may
           make sense to incorporate optional deep redundancy in
           the recovery journal, for efficiency reasons and to
           simplify streaming server design (Herbie Robinson).

        -- An "immediate execution" option -- a way to send MIDI 
           commands that truly have no timestamp, but instead have
           an "execute as soon as delivered" semantics relative to
           other timestampped commands. This is not possible to do by 
           manipulating timestamps in a single MWPP stream, because
           timestamps must be monotonically increasing, in order to
           simplify life for the recovery journal system. The current
           solution is two synchronized streams, the normal stream and
           an "emergency" stream whose timestamps lag (Martijn Sipkema).

   [3] Combine the "big ticket" decisions with received comments
       on -05.txt and bugfixes found during the BCP draft writing,
       to write (potentially) the first candidate for Last Call.

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John Lazzaro -- Research Specialist -- CS Division -- EECS -- UC Berkeley
lazzaro [at] cs [dot] berkeley [dot] edu     www.cs.berkeley.edu/~lazzaro
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