Patent ID: 8639088

Claim:
An end device of collecting content playback information of a user, the end device comprising: a storage to store content and a table including playback history information of the content in a predetermined local storage address, the playback history information including at least a playback count; a control unit to retrieve content, selected by the user, from the storage, to load a storage address of the selected content, and to transmit the storage address to a decoder; and wherein the decoder is configured to store the storage address in the table, to change at least a playback count of respective playback information of the selected content, and to decode the selected content based on the storage address, wherein the end device downloads the content by synchronizing with a personal media station, in which a program configured to collect playback history information of contents is installed according to a permission of the user, and wherein the end device transmits the playback history information of the content from the storage to the personal media station which updates a content usage history for the end device based in part on the playback history information transmitted.