MPEG-7

MPEG-7 is a multimedia content description standard. It was standardized in ISO/IEC 15938 (Multimedia content description interface).^[1][2][3][4] This description will be associated with the content itself, to allow fast and efficient searching for material that is of interest to the user. MPEG-7 is formally called Multimedia Content Description Interface. Thus, it is not a standard which deals with the actual encoding of moving pictures and audio, like MPEG-1, MPEG-2 and MPEG-4. It uses XML to store metadata, and can be attached to timecode in order to tag particular events, or synchronise lyrics to a song, for example.

It was designed to standardize:

• a set of Description Schemes (“DS”) and Descriptors (“D”)
• a language to specify these schemes, called the Description Definition Language (“DDL”)
• a scheme for coding the description

The combination of MPEG-4 and MPEG-7 has been sometimes referred to as MPEG-47.^[5]

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