Design and implementation of XMT-A to/from MP4 converter for interactive DMB data service

The digital multimedia broadcasting (DMB) adopted the MPEG-4 standard as the AV standard. And the development of DMB and MPEG-4 led to the necessity of the various contents. In MPEG-4, two types of file format such as MPEG-4 file format (MP4) and extensible MPEG-4 textual format (XMT) which are the format to express the contents are defined for the composition of objects. Each format has its advantages and disadvantages. To supplement these pros and cons, the conversion from one to the other format is used. Converting from one to the other is the essential element for efficient authoring, streaming and management of multimedia contents based on MPEG-4. Therefore, implementing a converter is the one of the most important things to handle the contents efficiently. In this paper, the design and implementation of XMT-A to/from MP4 converter which supports the AVC file format are presented for interactive DMB services.