Patent ID: 7912340

Claim:
A data processing apparatus comprising: a reader for reading data recorded on a non-linear accessible recording medium having recorded thereon video data including high rate video data and low rate video data for the same material, wherein a data volume of low rate video data read per unit time is larger than that of the high rate video data; and an output data generator; said output data generator causing said reader to read out said low rate video data from said recording medium while simultaneously performing reproduction of high speed video data, forming respective frames of output video data so that a predetermined plural number of said low rate video data are displayed at least portion-wise in one and the same frame, and updating the respective frames of said output video data portion-wise with said low rate video data read out by said reader for each of said respective frames of said output video data, wherein the low rate video data is read out instead of the high rate video data when reproducing high speed video data, and wherein the time period for reproduction of the low rate video data including readout and decoding from the non linear recording medium is shorter than the time period for reproduction of the high rate video data including readout and decoding from the non linear recording medium.