A frame, which is the data unit, is extracted without decoding MPEG audio data. Then, a scale factor included in the frame is extracted and an evaluation function is calculated based on the scale factor. If the value of the evaluation function is larger than a prescribed threshold value, the speed of...http://www.google.de/patents/US20010047267?utm_source=gb-gplus-sharePatent US20010047267 - Data reproduction device, method thereof and storage medium
