| Basic Info | |
|---|---|
| Media Type | audio |
| subtype | vnd.nokia.mobile-xmf |
| Registered? | Yes |
| See also | Nokia Corporation |
| Extensions | |
Tags: (none)
File Formats: (none)
(last updated 2004-03-08) Name : Nokia Corporation Email : [email protected] MIME media type name : Audio MIME subtype name : Vendor Tree - vnd.nokia.mobile-xmf Required parameters : none Optional Parameters: prl: 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. 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-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 "020001". (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 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.) 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: binary 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 vnd.nokia.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. 6 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 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. Applications which use this media: 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. Magic number(s): Bytes1-12: \\130\\115\\106\\137\\062\\056\\060\\060\\000\\000\\000\\002 File extension(s): mxmf Macintosh File Type Code(s): mxmf Object Identifier(s): none Intented usage: Limited Use MIME type used to signal on the device which sw modules shall be activated for the rendering of the media content specified by the MIME type. Upper sw layer in the device routes the content to correct target modules based on the MIME type. General comment: Updated information to previously granted MIME type vnd.nokia.mobile-xmf Contact name: Nokia Contact email: [email protected] Author: [Created 2003 October 09]