Patent ID: 8050539
Filing Date: 2011-11-01
Classification: G11B,H04N

Abstract:
1. A data recording apparatus, comprising: a key frame detection unit configured to detect randomly-accessible key frames from encoded video data; a control data generation unit configured to generate reproduction controlling data, wherein the reproduction controlling data that includes (a) time stamp information relating to reproduction time locations of the randomly-accessible key frames and (b) file offset information indicating data locations in the encoded video data at which the randomly-accessible key frames are positioned and excludes (c) time stamp information of non-randomly accessible frames and (d) offset information of the non-randomly accessible frames; and a file generation unit configured to generate the file that contains said video data and said reproduction controlling data generated by said control data generation unit, wherein the reproduction controlling data is positioned in an area which is within the file and ignored by a reproduction apparatus that does not understand the reproduction controlling data.