Patent ID: 7769477

Claim:
A method for converting a first audio data stream representing a coded audio signal comprising time periods and having a first file format into a second audio data stream representing the coded audio signal and having a second file format, wherein a time period comprises a number of audio values, and wherein, according to the first file format, the first audio data stream is divided into subsequent data blocks, wherein a data block comprises a determination block and data block audio data, wherein determination block audio data are associated to the determination block, which are obtained by coding a time period, wherein the determination block comprises a pointer pointing to a beginning of the determination block audio data, and wherein and end of the determination block audio data lies prior to a beginning of determination block audio data in the audio data stream associated to a next data block, comprising the steps of: combining the determination block audio data associated to a determination block of at least two data blocks to obtain contiguous determination block audio data forming part of the second audio data stream; adding the contiguous determination block audio data to the determination block to which the determination block audio data are associated, from which the contiguous determination block audio data are obtained, to obtain a channel element; arranging the channel elements to obtain the second audio data stream; and modifying the channel element so that said determination block thereof includes a length indication indicating the amount of data of the channel element or an amount of data of the contiguous determination block audio data, wherein the step of modifying comprises replacing a redundant part identical for all determination blocks by the length indication.