The IESG has approved the following document: - 'Registration of media type audio/mobile-xmf ' <draft-kosonen-mobile-xmf-mediatype-01.txt> as an Informational RFC This document has been reviewed in the IETF but is not the product of an IETF Working Group. The IESG contact person is Ted Hardie. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-kosonen-mobile-xmf-mediatype-01.txt Technical Summary 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. Working Group Summary This document is an individual submission. Protocol Quality Ietf-types reviewed this document. Note to RFC Editor OLD 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. NEW 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. The same resource is listed only 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. 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. OLD 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. 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.) NEW 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 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.) OLD 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.) NEW 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 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.) _______________________________________________ IETF-Announce@ietf.org https://www1.ietf.org/mailman/listinfo/ietf-announce
