With the popularity of media playing devices both in daily life and in the business world, just like traditional documents (text and graphics), there are many formats for media data. With the development of the Internet, media files are often streamed over the Internet. As a result, on top of the encoding and decoding mechanism imposed on the media data, a certain compression and decompression mechanism is also inserted into the packaging of these data.Sound and motion picture information are packaged in different streams. Synchronization between these streams can also be an issue. Datum is well-armed with professional programmers and software programs to handle conversion of multi-media files; synchronize sound and picture; bit rate alteration; compression ratio; change of fidelity; etc.

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