| http://www.w3.org/ns/prov#value | - The communications between the components 3 and 2 are performed trough the PCM. At this time, the component 3 is assumed to have the function of converting the MP3 sound source into the PCM sound source, and it is determined that the components 2 and 4 communicate voice data in the MD format. [0091] Thus, for example, the path from the component 1 such as a CD player, etc. to the component 4 such
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