Multidimensional Optimization of MPEG-4 AAC Encoding

The subjective quality achieved by most audio codecs, including MPEG-4 AAC, depends strongly on the algorithms used for encoder parameter selection. As a practical measure in conventional encoders, the overall encoding procedure is usually divided into a sequence of smaller problems that are solved heuristically. In this paper, we formulate the MPEG-4 AAC encoding problem as a multidimensional optimization procedure and present simulation results indicating performance gains relative to conventional approaches