Patent ID: 7730505

Claim:
A stream reproducing device comprising: a detection unit that is arranged towards a plurality of viewers and that is operable to detect a presence of any of the plurality of viewers and operable to output a result of the detection; a person detecting unit operable to detect and distinguish each individual viewer of the plurality of viewers from any other viewer of the plurality of viewers based on the output of said detection unit; a viewing information generating unit operable to generate viewing information with respect to each individual viewer of the plurality of viewers based on a result of the detecting and distinguishing of said person detecting unit; and a reproduction control unit operable to be supplied with a stream and operable to control a reproduction of the stream in order to output the reproduction of the stream, wherein the generated viewing information, with respect to each individual viewer of the plurality of viewers, is related to a time stamp of the stream, such that the generated viewing information, with respect to each respective individual viewer of the plurality of viewers, indicates a non-viewed period during which each respective individual viewer of the plurality of viewers has not viewed the reproduction of the stream, and wherein, when viewers are detected to be present in front of the stream reproducing device, the non-viewed period is determined, collectively for the viewers detected to be present, according to a logical product and/or a logical sum of each non-viewed period of the viewers detected to be present.