Patent ID: 7418393
Filing Date: 2008-08-26
Classification: G10L

Abstract:
1. A data reproduction device for reproducing compressed multimedia data, including audio data which are MPEG audio data and also converting reproduction speed without decoding compressed audio data, comprising: an extraction unit extracting a frame, which is unit data of the audio data; a setting unit setting a reproduction speed of the audio data; a scale factor extraction unit extracting a scale factor included in the frame; a calculation unit calculating an evaluation function from the extracted scale factor, to thereby provide a calculation result; a speed conversion unit comparing the calculation result of the calculation unit with a prescribed threshold value, judging to be a sound section frame if the calculation result is larger than the threshold value and, if a sound section frame is judged, speed converting the extracted frame by thinning out the extracted frame or repeatedly outputting the extracted frame; a decoding unit decoding the speed converted frame; and a reproduction unit reproducing audible sound represented by the audio data from the decoded frame.