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multimedia object transfer protocol (MOT)

The Multimedia Object Transfer Protocol (MOT) standardized by the European Telecommunications Standards Institute (ETSI) is a protocol for file transfer with which multimedia data is transmitted to the recipients in broadcast mode without a return channel. Due to the unidirectional operation, the MOT protocol has various mechanisms and additional information with which the display of the transmitted files at the receiver can be controlled and the data stock can be managed.

The frame structure of the MOT protocol, in whose header general and special attributes concerning the objects are transferred, is correspondingly complex. The general information, which is stored in the header core, concerns among other things the file format and the file size. The special information is entered in the header extension and concerns the compression method and special information about the file type. Error protection procedures with cyclic block checking(CRC) reduce possible transmission errors. The files themselves are segmented, and the individual file segments can be transmitted repeatedly.

Structure of the MOT data frame

Structure of the MOT data frame

The MOT protocol is used for the transmission of multimedia objects in digital audio broadcasting( DAB), namely for DAB data services that have no relation to the program, the so-called Non-Program Associated Data( NPAD). And here specifically for the transmission of traffic information for digital traffic radio( TMC) and for the TPEG service, Transport Protocol Exchange Group (TPEG).

Informations:
Englisch: multimedia object transfer protocol - MOT
Updated at: 07.05.2013
#Words: 219
Links: European telecommunications standards institute (ETSI), protocol, file transfer (FT), multimedia (MM), data
Translations: DE
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