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Implementation of a DRM Audio Decoder (aacPlus) on ARM Architecture

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Founded in 1998, DRM (Digital Radio Mondiale) aimed to create a new digital broadcast standard for the frequencies below 30 MHz (long, medium and short wave). The DRM standard has been finalized in January 2001 and offers significantly improved audio and reception quality. The audio codec chosen combines Spectral Band Replication (SBR) with MPEG AAC (Advanced Audio Coding). This new technique, also known as aacPlus, offers unprecedented compression efficiency and excellent audio quality for the chosen bitrates. As the launching date for first DRM services comes closer, different chip sets are in course of development in order to make them available to receiver manufacturers. This paper will focus on the implementation of aacPlus on an ARM (Advanced Risc Machine) platform within the DIAM (Digital AM) project.

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