A method for operating a data reproduction device enables users to resume reproduction of audio and/or video content across different devices of the same or different type. According to an exemplary embodiment, the method includes steps of receiving first index data from a different data reproduction device wherein the first index data indicates a first position in content in a first format and the content includes at least one of audio and video data, determining a second position in the content in a second format using the first index data, and enabling reproduction of the content in the second format beginning from the second position.