[feature article] Low bit-rate audio coding has been part of mainstream audio engineering for a considerable number of years now, but new developments continue to arise and improvements continue to be made. The challenges of addressing scalable delivery for networked and mobile applications are considerable, as are those associated with narrow-band broadcasting applications such as DRM (Digital Radio Mondiale). There are also ways in which perceived sound quality can be improved using novel techniques such as SBR (spectral band replication) while maintaining remarkably low bit rates. In this article selected papers from recent AES conventions are reviewed to provide an overview of some of the key developments in these and other areas.
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