Patent ID: 7565057

Claim:
An information processing apparatus comprising: recording means for recording image information and/or audio information onto a replaceable tape-shaped recording medium wound on a pair of reels; filing means for filing the image information and/or the audio information which have been written on the replaceable tape-shaped recording medium by the recording means; file information writing/reading means for writing and reading, in a non-contact state, file information of the file into random accessible memory provided in a manner associated with the replaceable tape-shaped recording medium; and winding radius calculating means for calculating winding radius of each reel with the replaceable tape-shaped recording medium when a file is recorded on the tape-shaped recording medium, wherein the radius calculating means calculates the winding radius based on a radius of a capstan, a first counter value of the capstan, and a second counter value of each of the reels, wherein the calculated winding radius is associated with the file as the file information, and wherein the winding radius calculating means further calculates a total volume of the pair of reels wound with the replaceable tape-shaped recording medium in order to calculate the winding radius.