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Versions: (draft-kosonen-mobile-xmf-mimetype) 00 01 RFC 4723

Internet-Draft                                              T. Kosonen
draft-kosonen-mobile-xmf-mediatype-01.txt                        Nokia
Obsoletes: draft-kosonen-mobile-xmf-mediatype-00.txt          T. White
Expires: 3 November 2006                                           MMA
                                                            2 May 2006


               Registration of media type audio/mobile-xmf


Status of this Memo

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   This document is an individual submission to the IETF.  Comments
   should be directed to the authors.

Abstract

   The MIDI Manufacturers Association (MMA) and the Association of Music
   Electronics industry (AMEI) have produced the Mobile XMF standard
   [1].  The Mobile XMF standard has been developed particularly for
   mobile MIDI [7] applications.  Mobile XMF is a very compact media
   type providing high quality synthetic audio content for music
   downloading and messaging applications that require MIME
   registration.







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1.  Introduction

   MIDI content is used commonly in the Internet.  Commonly, MIDI data
   is stored in the Standard MIDI File (SMF) format [8].  This MIME type
   registration uses the Mobile XMF file format for the encapsulation of
   SP-MIDI [3,4] and Mobile DLS [2] data.

2.  Registration of audio/mobile-xmf

   Type name: audio

   Subtype name: mobile-xmf

   Required parameters: none

   Optional parameters:

      revision: Mobile XMF file type revision ID

         revision is the Mobile XMF file type revision ID number from
         the XmfFileTypeRevisionID field of the XMF Meta File format
         2.00.  revision is encoded in hex in US-ASCII.

      prl: Playback resource list

         prl is a string (inside double quotation marks "") containing
         the playback resources included in all Content Description
         MetaDataItems of the Mobile XMF file.  The string contains two
         digit hexadecimal numbers representing data bytes from the
         Content Description Meta Data.  The same resource is listed
         only once.  A playback resource contains two parts: a prefix
         and data.  prl is encoded in two-digit hex numbers concatenated
         in a US-ASCII string.

         Example: If the file includes Playback Resource Lists such as
         [00h 01h 00h 02h] and [00h 01h 00h 03h], the corresponding prl
         is "000100020003" containing playback resources 01, 02, and 03
         with the prefix 00.

      minimum-pr: Minimum playback requirements

         minimum-pr is a string containing the Maximum Instantaneous
         Resource (MIR) values from the first row of all MIR Count
         Tables corresponding to the playback resources listed in prl.
         Only the largest value from the values of the same resource is
         chosen.  minimum-prl is encoded in two-digit hex numbers
         concatenated in a US-ASCII string.




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         minimum-pr requires the use of prl and the values in minimum-pr
         must be in the same order as the resources in prl.  minimum-pr
         is the most important of minimum-pr and total-pr, because it
         defines the minimum playback requirements.

         Example: If the file includes first rows of MIR Count Tables
         such as [02h 00h] and [01h 01h] corresponding to the above
         Playback Resource Lists, the corresponding minimum-pr is
         "020001".  (02 is the largest of 2 and 1, 00 is the largest of
         0, and 01 is the largest of 1.)

      total-pr: Total playback requirements

         total-pr is a string containing the MIR values from the last
         row of all MIR Count Tables corresponding to the playback
         resources listed in prl.  Only the largest value from the
         values of the same resource is chosen.  total-pr is encoded in
         two-digit hex numbers concatenated in a US-ASCII string.

         total-pr requires the use of prl and the values in total-pr
         must be in the same order as the resources in prl.

         Example: If the file includes last rows of MIR Count Tables
         such as [05h 02h] and [06h 01h] corresponding to the above
         Playback Resource Lists, the corresponding total-pr is
         "060201".  (06 is the largest of 5 and 6, 02 is the largest of
         2, and 01 is the largest of 1.)

   Encoding considerations:

      mobile-xmf data is binary data and must be encoded for non-binary
      transport; Base64 is suitable for Email.

   Security considerations:

      Many synthetic audio compositions have associated intellectual
      property rights.  It is conceivable that the rights owners of
      mobile-xmf content will want to protect their rights by applying
      security mechanisms that prohibit the rendering of the content
      without a legally acquired license to do so.  These mechanisms
      would be applied externally to the Content-Type defined here;
      mobile-xmf content itself is not encrypted internally.  mobile-xmf
      streams do not contain executable content.  Mobile XMF players are
      robust against corrupted mobile-xmf content, because Mobile XMF
      players ignore unidentified content.  prl, minimum-pr, and total-
      pr parameters can be used to represent Mobile DLS playback memory
      requirements for protecting against the excessive usage of
      playback memory.



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   Interoperability considerations:

      Mobile XMF is a Musical Instrument Digital Interface (MIDI)
      specification developed by MMA and AMEI.  mobile-xmf is based on
      the XMF 2.00 specification [5,6], which standardizes a meta file
      format for the electronic distribution of music.  mobile-xmf data
      is stored in XMF file format [5,6].


   Published specification:

      Mobile XMF Content Format Specification, MMA specification
        v1.0., RP-42, Los Angeles, CA, USA.  2004.

      Specification is available from:
         http://www.midi.org/about-midi/specshome.shtml

   Applications which use this media type:

      mobile-xmf is a synthetic audio format for the flexible
      presentation of SP-MIDI and Mobile DLS instrument data on a wide
      range of playback devices, particularly portable appliances such
      as mobile phones, PDAs, and palmtop computers.

   Additional information:

      Magic number(s):

         First twelve bytes:
         \130\115\106\137\062\056\060\060\000\000\000\002

      File extension(s): mxmf

      Macintosh File Type Code(s): mxmf

   Person & email address to contact for further information:

      Timo Kosonen
      Email: timo.kosonen@nokia.com

   Intended usage: COMMON

   Restrictions on usage: none








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   Authors:

      Timo Kosonen
      Email: timo.Kosonen@nokia.com

      Tom White
      Email: twhite@midi.org

   Change controller:

      MIDI Manufacturers Association
      P.O. Box 3173
      La Habra CA
      90632-3173
      Tel (714) 736-9774
      Fax (714) 736-9775
      Point of contact:
      Tom White
      Email: twhite@midi.org

3.  Security Considerations

   Security considerations are specified in the MIME subtype
   registration contained in Section 2.

4.  IANA Considerations

   Section 2 of this document registers one MIME subtype.

5.  Authors' Addresses

   Timo Kosonen
   Nokia
   P.O. Box 100
   33721 Tampere
   Finland
   Tel: +358 5048 35206
   Fax: +358 7180 35899

   Email: timo.kosonen@nokia.com

   Tom White
   MIDI Manufacturers Association
   P.O. Box 3173
   La Habra CA
   90632-3173
   Tel (714) 736-9774
   Fax (714) 736-9775

   Email: twhite@midi.org

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6.  References

6.1  Normative references:

      1 Mobile XMF Content Format Specification, MMA specification
        v1.0., RP-42, Los Angeles, CA, USA.  2004.
      2 Mobile DLS, MMA specification v1.0., RP-41, Los Angeles, CA,
        USA.  2004.
      3 Scalable Polyphony MIDI Specification.  December 2001, RP-034,
        The MIDI Manufacturers Association, Los Angeles, CA, USA.
      4 Scalable Polyphony MIDI Device 5-24 Note Profile for 3GPP,
        December 2001, RP-035, The MIDI Manufacturers Association, Los
        Angeles, CA, USA.
      5 Specification for XMF Meta File Format, Version 1.00b.  The MIDI
        Manufacturers Association, Los Angeles, CA, USA, 2001.
      6 XMF Meta File Format 2.00, RP-043, MIDI Manufacturers
        Association, Los Angeles, CA, USA, 2004
      7 MIDI 1.0 Detailed Specification, Document Version 4.2.  February
        1996, In 'The Complete MIDI 1.0 Detailed Specification, Document
        Version 96.1.'  The MIDI Manufacturers Association., Los
        Angeles, CA, USA.
      8 Standard MIDI Files 1.0, In 'The Complete MIDI 1.0 Detailed
        Specification, Document Version 96.1.'  The MIDI Manufacturers
        Association., Los Angeles, CA, USA.
      9 Josefsson, S., Ed., "The Base16, Base32, and Base64 Data
        Encodings", RFC 3548, July 2003.

7.  IPR Disclosure Acknowledgement

   The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
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   made any independent effort to identify any such rights.  Information
   on the procedures with respect to rights in RFC documents can be
   found in BCP 78 and BCP 79.

   Copies of IPR disclosures made to the IETF Secretariat and any
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   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at
   http://www.ietf.org/ipr.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement



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   this standard.  Please address the information to the IETF at ietf-
   ipr@ietf.org.

8.  Copyright notice

   Copyright (C) The Internet Society (2006).  This document is subject
   to the rights, licenses and restrictions contained in BCP 78, and
   except as set forth therein, the authors retain all their rights.

   This document and the information contained herein are provided on an
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   ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
   INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
   INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
   WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.



































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