Network Working Group T. Kosonen
Request for Comments: 4723 Nokia
Category: Informational T. White
MMA
December 2006
Network Working Group T. Kosonen
Request for Comments: 4723 Nokia
Category: Informational T. White
MMA
December 2006
Registration of Media Type audio/mobile-xmf
媒体类型音频/移动xmf的注册
Status of This Memo
关于下段备忘
This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.
本备忘录为互联网社区提供信息。它没有规定任何类型的互联网标准。本备忘录的分发不受限制。
Copyright Notice
版权公告
Copyright (C) The IETF Trust (2006).
版权所有（C）IETF信托基金（2006年）。
Abstract
摘要
The MIDI Manufacturers Association (MMA) and the Association of Musical Electronics Industry (AMEI) have produced the Mobile XMF standard, which was developed particularly for mobile MIDI 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. This document registers the media type audio/mobile-xmf.
MIDI制造商协会（MMA）和音乐电子工业协会（AMEI）已经制定了移动XMF标准，该标准是专门为移动MIDI应用程序开发的。移动XMF是一种非常紧凑的媒体类型，为需要MIME注册的音乐下载和消息传递应用程序提供高质量的合成音频内容。本文档注册了媒体类型audio/mobile xmf。
MIDI content is used commonly in the Internet. Typically, 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 (Downloadable Sounds) [2] data.
MIDI内容在互联网上很常用。通常，MIDI数据以标准MIDI文件（SMF）格式存储[8]。此MIME类型注册使用Mobile XMF文件格式封装SP-MIDI[3,4]和Mobile DLS（可下载声音）[2]数据。
The MIDI Manufacturers Association (MMA) and the Association of Musical Electronics Industry (AMEI) have produced the Mobile XMF standard [1], which was developed particularly for mobile MIDI [7] applications.
MIDI制造商协会（MMA）和音乐电子工业协会（AMEI）已经制定了移动XMF标准[1]，该标准是专门为移动MIDI[7]应用开发的。
Type name: audio
类型名称：音频
Subtype name: mobile-xmf
子类型名称：mobile xmf
Required parameters: none
所需参数：无
Optional parameters:
可选参数：
revision: Mobile XMF file type revision ID
修订：移动XMF文件类型修订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.
revision是XMF元文件格式2.00的XmfFileTypeRevisionID字段中的移动XMF文件类型修订ID号。修订版以十六进制编码，采用US-ASCII。
prl: Playback resource list
播放资源列表
prl contains the playback resources included in all Content Description MetaDataItems of the Mobile XMF file. prl contains two-digit hexadecimal numbers representing data bytes from the Content Description Meta Data. Each resource is listed exactly once. A playback resource contains two parts: a prefix and data. prl is a sequence of two-digit hexadecimal numbers encoded in US-ASCII. Thus, prl has an even number of hexadecimal digits.
prl包含包含在移动XMF文件的所有内容描述元数据项中的播放资源。prl包含两位十六进制数，表示内容描述元数据中的数据字节。每个资源只列出一次。回放资源包含两部分：前缀和数据。prl是以US-ASCII编码的两位十六进制数字序列。因此，prl具有偶数个十六进制数字。
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 each with the prefix 00.
示例：如果文件包括回放资源列表，如[00h 01h 00h 02h]和[00h 01h 00h 03h]，则相应的prl为000100003，其中包含回放资源01、02和03，每个资源的前缀为00。
minimum-pr: Minimum playback requirements
最低pr：最低播放要求
minimum-pr contains 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 a sequence of two-digit hexadecimal numbers encoded in US-ASCII. Thus, minimum-prl has an even number of hexadecimal digits.
minimum pr包含与prl中列出的播放资源相对应的所有MIR计数表第一行的最大瞬时资源（MIR）值。仅从同一资源的值中选择最大值。最小prl是以US-ASCII编码的两位十六进制数字序列。因此，最小prl具有偶数个十六进制数字。
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 more important of minimum-pr and total-pr, because it defines the minimum playback requirements.
最低pr要求使用prl，最低pr中的值必须与prl中的资源顺序相同。最小pr在最小pr和总pr中更为重要，因为它定义了最小播放要求。
Example: If the file includes the 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.)
示例：如果文件包含与上述播放资源列表对应的MIR计数表的第一行，例如[02h 00h]和[01h 01h]，则对应的最小pr为02001。（02是2和1中最大的，00是0中最大的，01是1中最大的。）
total-pr: Total playback requirements
总pr：总播放要求
total-pr contains 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 a sequence of two-digit hexadecimal numbers encoded in US-ASCII. Thus, total-pr has an even number of hexadecimal digits.
total pr包含与prl中列出的播放资源相对应的所有MIR计数表最后一行的MIR值。仅从同一资源的值中选择最大值。total pr是以US-ASCII编码的两位十六进制数字序列。因此，总pr具有偶数个十六进制数字。
total-pr requires the use of prl, and the values in total-pr must be in the same order as the resources in prl.
total pr需要使用prl，并且total pr中的值必须与prl中的资源顺序相同。
Example: If the file includes the 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.)
示例：如果文件包含与上述播放资源列表相对应的最后几行MIR计数表，如[05h 02h]和[06h 01h]，则相应的总pr为060201。（06是5和6中最大的，02是2中最大的，01是1中最大的。）
Encoding considerations:
编码注意事项：
mobile-xmf data is binary data and must be encoded for non-binary transport; Base64 [9] is suitable for Email.
移动xmf数据是二进制数据，必须进行编码以进行非二进制传输；Base64[9]适用于电子邮件。
Security considerations:
安全考虑：
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.
许多合成音频作品都拥有相关的知识产权。可以想象，移动xmf内容的权利所有者希望通过应用安全机制来保护他们的权利，这些机制禁止在没有合法获得的许可证的情况下呈现内容。这些机制将在外部应用于此处定义的内容类型；移动xmf内容本身没有内部加密。移动xmf流不包含可执行内容。移动XMF播放器对损坏的移动XMF内容非常健壮，因为移动XMF播放器忽略未识别的内容。prl、最小pr和总pr参数可用于表示移动DLS播放内存需求，以防止播放内存的过度使用。
Interoperability considerations:
互操作性注意事项：
Mobile XMF is a Musical Instrument Digital Interface (MIDI) specification developed by MMA and AMEI. Mobile XMF is based on the XMF Meta File Format Specification v2.00 [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].
Mobile XMF是MMA和AMEI开发的乐器数字接口（MIDI）规范。移动XMF基于XMF元文件格式规范v2.00[5,6]，该规范为音乐的电子分发标准化了元文件格式。移动xmf数据以xmf文件格式存储[5,6]。
Published specification:
已发布的规范：
Mobile XMF Content Format Specification, MMA specification v1.0., RP-42, Los Angeles, CA, USA. 2004.
移动XMF内容格式规范，MMA规范v1.0.，RP-42，美国加利福尼亚州洛杉矶，2004年。
Specification is available from:
http://www.midi.org/about-midi/specshome.shtml
Specification is available from:
http://www.midi.org/about-midi/specshome.shtml
Applications which use this media type:
使用此媒体类型的应用程序：
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.
mobile xmf是一种合成音频格式，用于在各种播放设备（尤其是移动电话、PDA和掌上电脑等便携式设备）上灵活呈现SP-MIDI和移动DLS乐器数据。
Additional information:
其他信息：
Magic number(s):
幻数：
First twelve bytes: \130\115\106\137\062\056\060\060\000\000\000\002
前12个字节：\130\115\106\137\062\056\060\060\000\000\002
File extension(s): mxmf
文件扩展名：mxmf
Macintosh File Type Code(s): mxmf
Macintosh文件类型代码：mxmf
Person & email address to contact for further information:
联系人和电子邮件地址，以获取更多信息：
Timo Kosonen Email: timo.kosonen@nokia.com
Timo Kosonen电子邮件：Timo。kosonen@nokia.com
Intended usage: COMMON
预期用途：普通
Restrictions on usage: none
使用限制：无
Authors:
作者：
Timo Kosonen Email: timo.Kosonen@nokia.com
Timo Kosonen电子邮件：Timo。Kosonen@nokia.com
Tom White Email: twhite@midi.org
Tom White电子邮件：twhite@midi.org
Change controller:
更改控制器：
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
MIDI制造商协会邮箱3173加利福尼亚州拉哈布拉市90632-3173电话（714）736-9774传真（714）736-9775联系人：汤姆·怀特电子邮件：twhite@midi.org
Security considerations are specified in the MIME subtype registration contained in Section 2.
第2节中包含的MIME子类型注册中指定了安全注意事项。
Section 2 of this document registers one MIME subtype.
本文档第2节注册了一个MIME子类型。
[1] Mobile XMF Content Format Specification, MMA specification v1.0., RP-42, Los Angeles, CA, USA. 2004.
[1] 移动XMF内容格式规范，MMA规范v1.0.，RP-42，美国加利福尼亚州洛杉矶，2004年。
[2] Mobile DLS, MMA specification v1.0., RP-41, Los Angeles, CA, USA. 2004.
[2] 移动DLS，MMA规范v1.0.，RP-41，美国加利福尼亚州洛杉矶，2004年。
[3] Scalable Polyphony MIDI Specification. December 2001, RP-034, The MIDI Manufacturers Association, Los Angeles, CA, USA.
[3] 可伸缩复调MIDI规范。2001年12月，RP-034，美国加利福尼亚州洛杉矶MIDI制造商协会。
[4] Scalable Polyphony MIDI Device 5-24 Note Profile for 3GPP, December 2001, RP-035, The MIDI Manufacturers Association, Los Angeles, CA, USA.
[4] 适用于3GPP的可伸缩复调MIDI设备5-24音符配置文件，2001年12月，RP-035，MIDI制造商协会，美国加利福尼亚州洛杉矶。
[5] Specification for XMF Meta File Format, Version 1.00b. The MIDI Manufacturers Association, Los Angeles, CA, USA, 2001.
[5] XMF元文件格式规范，版本1.00b。MIDI制造商协会，美国加利福尼亚州洛杉矶，2001年。
[6] XMF Meta File Format 2.00, RP-043, MIDI Manufacturers Association, Los Angeles, CA, USA, 2004
[6] XMF元文件格式2.00，RP-043，MIDI制造商协会，美国加利福尼亚州洛杉矶，2004年
[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.
[7] MIDI 1.0详细规范，文件版本4.2。1996年2月，在美国加利福尼亚州洛杉矶市MIDI制造商协会的“完整MIDI 1.0详细规范，文档版本96.1”中。
[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.
[8] 标准MIDI文件1.0，在“完整的MIDI 1.0详细规范，文档版本96.1”中。MIDI制造商协会，美国加利福尼亚州洛杉矶。
[9] Josefsson, S., "The Base16, Base32, and Base64 Data Encodings", RFC 4648, October 2006.
[9] Josefsson，S.，“Base16、Base32和Base64数据编码”，RFC4648，2006年10月。
Authors' Addresses
作者地址
Timo Kosonen Nokia P.O. Box 100 33721 Tampere Finland
芬兰坦佩雷Timo Kosonen诺基亚邮政信箱100 33721
Tel: +358 5048 35206
Fax: +358 7180 35899
EMail: timo.kosonen@nokia.com
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 USA
美国加利福尼亚州拉哈布拉市汤姆·怀特MIDI制造商协会邮政信箱3173，邮编90632-3173
Tel: (714) 736-9774 Fax: (714) 736-9775 EMail: twhite@midi.org
电话：（714）736-9774传真：（714）736-9775电子邮件：twhite@midi.org
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完整版权声明
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知识产权
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确认
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