Patent ID: 7843772

Claim:
A content use system, including: a recording apparatus configured to store a first content data; and a portable reproducing apparatus configured to reproduce a second content data, wherein the recording apparatus comprises: storage means for storing the first content data; reproduction history information acquisition means for acquiring reproduction history information about a reproduction period of the second content data from the portable reproducing apparatus; content data extraction means for extracting the first content data in accordance with the reproduction period of the second content data; and content data transfer means for transferring the first content data to the portable reproducing apparatus, and wherein the portable reproducing apparatus comprises: content data acquisition means for acquiring the first content data from the recording apparatus; reproduction history information generation means for generating a reproduction start time of the second content data in accordance with a time at which a reproduction of the second content data is started and for generating a reproduction stop time of the second content data in accordance with a time at which the reproduction of the second content data is stopped; and reproduction history information transfer means for transferring the reproduction history information about the reproduction period of the second content data to the recording apparatus, the reproduction period of the second content data being a period extending from the reproduction start time of the second content data to the reproduction stop time of the second content data.