Patent ID: 6721710
Filing Date: 2004-04-13
Classification: G10L

Abstract:
A method for providing an audible fast forward or reverse for an audio data file encoded in a compressed variable length format, comprising:jumping forward or backward in the data file by a preselected amount, grabbing a data chunk whose length is at least a function of the sampling rate and bit rate, said data chunks for successive jumps separated in time, storing said data chunk, analyzing said stored data chunks including searching each data chunk for a first syncword and associated header, parsing said associated header of said syncword to determine a location for a next syncword and associated header, parsing said associated header of said next syncword to determine consistency with said associated header of said first syncword, if said associated header of said first syncword is consistent with said associated header of said next syncword, then selecting audio format data corresponding to said associated header of said first syncword, and if a first syncword is not found or if said associated header of said first syncword is inconsistent with said associated header of said next syncword, then selecting more of said audio format data and repeating said step of analyzing said stored data chunks, selectively decoding said selected audio format data, and playing said decoded selected audio format data.