Patent ID: 7561779

Claim:
A data processor comprising: a receiving section that receives a data stream including data representing first primary video having a first picture rate and data representing first auxiliary video to be presented synchronously with the first primary video; and a converting section for converting the data representing the first primary video and the first auxiliary video into data representing synthetic video having a second picture rate, which is different from the first picture rate, wherein the data stream includes timing information defining respective times to present the first primary video and the first auxiliary video, and wherein, in converting the first primary video data and the first auxiliary video data of a film material into NTSC- or PAL-compliant synthetic video data, the converting section associates second auxiliary video, having the same contents as the first auxiliary video on a picture of the first primary video, with a plurality of pictures of second primary video, corresponding to the picture of the first primary video, thereby generating synthetic video composed of the second primary video and the second auxiliary video.