Internet DRAFT - draft-hamalainen-mobile-xmf-mimetype
draft-hamalainen-mobile-xmf-mimetype
M. Hamalainen
Internet Draft Nokia
Document: draft-hamalainen-mobile-xmf-mimetype-00.txt T. White
MMA
Expires: December 2004 July 2004
Registration of MIME media type audio/mobile-xmf
Status of this Memo
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Abstract
MIDI Manufacturers Association (MMA) and Association of Music
Electronics industry (AMEI) have recently produced the Mobile XMF
standard [1]. The Mobile XMF standard has been developed in
particularly for mobile MIDI [6] applications. Mobile XMF
information is a very compact media type providing high quality
synthetic audio content for music downloading and messaging
applications that require MIME registration.
Hamalainen & White [Page 1]
Mobile XMF MIME July, 2004
1 Introduction
MIDI content is commonly used in the Internet. Commonly MIDI
information is stored in the Standard MIDI File (SMF) format [7].
The present 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
MIME media type name: audio
MIME subtype name: mobile-xmf
Required parameters: none
Optional parameters:
prl
prl is a string (inside double quotation marks ææ
ÆÆ) 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. If the file includes Playback Resource Lists such as [00h
01h 00h 02h] and [00h 01h 00h 03h], the corresponding prl is
ææ000100020003ÆÆ containing playback resources 01, 02, and 03
with the prefix 00.
minimum-pr
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. 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
ææ020001ÆÆ. (02 is the largest of 2 and 1, 00 is the largest of
0, and 01 is the largest of 1.) 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.
total-pr
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. If the file includes last rows
Hamalainen & White July 2004 [Page 2]
Mobile XMF MIME July, 2004
of MIR Count Tables such as [05h 02h] and [06h 01h]
corresponding to the above Playback Resource Lists, the
corresponding total-pr is ææ060201ÆÆ. (06 is the largest of 5 and
6, 02 is the largest of 2, and 01 is the largest of 1.) total-
pr requires the use of prl and the values in total-pr must be
in the same order as the resources in prl.
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 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.
Interoperability considerations:
Mobile XMF is a Musical Instrument Digital Interface (MIDI)
specification developed by MMA and AMEI. mobile-xmf is based on
the XMF 1.0 specification [5] which standardizes a meta file
format for the electronic distribution of music. mobile-xmf
data is stored in XMF file format [5].
Published specification:
There are no previous RFC documents on audio/mobile-xmf.
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.
Hamalainen & White July 2004 [Page 3]
Mobile XMF MIME July, 2004
6 MIDI 1.0 Detailed Specification, Document Version 4.2.
February 1996, In æThe Complete MIDI 1.0 Detailed
Specification, Document Version 96.1.Æ The MIDI
Manufacturers Association., Los Angeles, CA, USA.
7 Standard MIDI Files 1.0, In æThe Complete MIDI 1.0
Detailed Specification, Document Version 96.1.Æ The MIDI
Manufacturers Association., Los Angeles, CA, USA.
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
Intended usage: COMMON
3 IANA Considerations
Section 2 of this document registers one MIME subtype.
4 Security Considerations
Security considerations are specified in the MIME subtype
registration contained in Section 2.
5 Authors' Addresses
Matti Hamalainen
Nokia
P.O. Box 100 (Visiokatu 1)
FIN-33721 Tampere, Finland
Tel: +358 7180 35789
Fax: +358 7180 35899
Email: matti.s.hamalainen@nokia.com
Hamalainen & White July 2004 [Page 4]
Mobile XMF MIME July, 2004
Tom White,
MIDI Manufacturers Association
P.O. Box 3173
La Habra CA
90632-3173
Tel (714) 736-9774
Fax (714) 736-9775
Email: mma@midi.org
Author/Change controller:
Matti Hamalainen
Nokia
P.O. Box 100 (Visiokatu 1)
FIN-33721 Tampere, Finland
Tel: +358 7180 35789
Fax: +358 7180 35899
matti.s.hamalainen@nokia.com
6 Copyright notice
Copyright (C) The Internet Society (2004). 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 "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION
HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET
SOCIETY AND THE INTERNET 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.
Hamalainen & White July 2004 [Page 5]
