Multimedia mail meeting notes
RFC 807

Document Type RFC - Unknown (February 1982; No errata)
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Network Working Group                                          J. Postel
Request for Comments:  807                                           ISI
                                                         9 February 1982

                     Multimedia Mail Meeting Notes

Introduction

   A meeting was held at USC Information Sciences Institute on the 12th
   of January 1982 to discuss multimedia mail issues and experiments.
   The list of attendees is at the end of this memo.

Overview:

   This meeting was called to discuss common interests in multi-media
   computer mail experiments, and to agree on some specific initial
   experiments.

Review of Status:

   Review current status of multimedia efforts at CMU, ISI, MIT, COMSAT,
   BBN, UCL, SRI.

   CMU

      Using PERQ, Quip for fax, LPCM vocoder from LL, will get NEC board
      (3 chips) to replace vocoder.  Will have a stand alone voice I/O
      device that operates at 2400 baud (not packetized). Not working on
      IP/TCP.  Will use the IP and TCP from the BBN project. Already
      using the BBN Jericho developed Pascal IP and CFTP. Interested in
      word recognition of LPC digitized voice data. Planning to package
      a synthesiser, an analyzer, and a pitch tracker on one board.

   ISI

      Using TOPS20 (code in BLISS10), and starting to use PERQ (code in
      Pascal), RAPICOM 450 for fax.  Main interest is in the data
      structuring and message transport protocols.

   MIT

      Using Apollos, will program in MDL.  Use of Apollos still limited
      due to (1) MDL not completely implemented, (2) network interface
      not yet available (waiting on multibus  to then interface to
      Ethernet). Will get NEC CCITT fax machine. Looking into VAX+BBN
      BitGraph for future.  Main work to date in  design for sharing
      message data in a conceptualy centralized filing system.  Emphasis

Postel                                                          [Page 1]



Multi-Media Mail Meeting Notes                           9 February 1982

      on efficient storage and manipulation of multirecipient messages,
      enclosures, citations, etc.

   COMSAT

      Using small 11s, Rapicom 450 and 500 fax machines, also have some
      LPC vocoders.  Substantial work has been done on encoding and
      decoding both Rapicom 450 and CCITT T.4 fax data, and also on
      manipulation of bitmap data (See RFC 803).

   BBN

      Using Jericho (code in Pascal). Will be building a prototype
      system with the aim of investigating problems of data distribution
      and privacy.  Trying to produce portable software currently in
      Pascal but may switch to ADA in the distant future.  Have IP and
      CFTP running, working on TCP. CFTP is a file transfer built
      directly on IP.

   UCL

      Using LSI-11, Rapicom 450 fax machine, Grinell bitmap display.
      May get PERQs (produced by ICL) in future.  Have done quite a lot
      of work on encoding/decoding for the Rapicom 450, and in bitmap
      manipulations (e.g., cleanup of noise, scaling, cut and paste).
      Interests in the relation of other types of display protocols to
      multimedia effort e.g., VIDEOTEXT and TELETEXT.

   SRI

      There are three multimedia mail projects at SRI,sponsored by DCEC,
      ARPA, and NAVELEX.  SRI is a subcontractor (with Sytek and DTI) to
      SDC in the DCEC program to produce protocol specifications for the
      DoD.  SRI has written service specifications for a mail system
      similar to RFC759+767 with security features added.  The ARPA
      project is studying the issues involved in a multimedia mail
      architecture based on RFC759+767, including negotiations,
      envelopes, and multilevel security.  The NAVELEX project is
      investigating user interfaces for command and control
      workstations, including natural language access to a data base.
      The plan is to use RFC759+767 data structures to communicate text
      and graphics, implemented on Foonly F-5s running Tenex with
      Foo-Vision displays.  The current choice for the graphics protocol
      is Bisbey's GL2.

Postel                                                          [Page 2]



Multi-Media Mail Meeting Notes                           9 February 1982

Discussion:

   Coding/Decoding Algorithm:

      We agree to use the encoding specified in the CCITT T.4
      recommendation for the exchange of black and white bitmap data.

   New Equipment:

      It is reported that soon NEC will have CCITT T.4 Group 3 Fax
      machines for about $15K.

   NBS Mail Standard:

      The possibility that the NBS Mail Format Standard is a workable
      alternative to the RFC759+767 protocol is to be studied.  What is
      the relationship between these standards?  Do we have comment on
      the NBS Standard to submit to NBS?

   Equipment Variations:

      What happens if the receiver does not have equipment capable of
      protraying some of the data (e.g., dosen't have a  LPC vocoder)?
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