Patent ID: 7840290

Claim:
An encoded digital audio reproducing apparatus comprising: a reading control portion which reads from a recording medium an encoded audio file having a data part including audio data as a sequence of frames and a size part including size information on each of the frames; a table generating portion which receives the size information on the frames from the reading control portion and generates a table holding positional information on frames at intervals of a predetermined number of frames in the sequence of frames based on the size information on the frames in the sequence of frames; a decoding portion which receives the audio data from the reading control portion and sequentially decodes the audio data from a leading frame to output the decoded audio data; a reproducing portion which reproduces the decoded audio data; and a reproduction start position calculating portion which, in the case where a reproduction request from an arbitrary frame in the audio data is inputted, decides from the table a frame satisfying a positional reference for the arbitrary frame as a reproduction start frame, wherein the decoding portion requests the reading control portion to read frames from the reproduction start frame from the recording medium, and wherein, the table generating portion generates a table in which, in a predetermined range from the arbitrary frame in the sequence of frames, intervals between frames whose positional information should be held are smaller than that not in the predetermined range.