Conference/Proceedings118th AES Convention
Start date28.05.2005
End date31.05.2005
Author(s)Tilman Liebchen, Y. Reznik
TitleImproved Forward-Adaptive Prediction for MPEG-4 Audio Lossless Coding
AbstractMPEG-4 Audio Lossless Coding (ALS) is a new addition to the suite of MPEG-4 audio coding standards. The ALS codec is based on forward-adaptive linear prediction, which offers remarkable compression even with low predictor orders. Nevertheless, performance can be signicantly improved by using higher predictor orders, more efficient quantization and encoding of the predictor coecients, and adaptive block length switching. The paper describes the basic elements of the ALS codec with a focus on these recent improvements. It also presents the latest developments in the standardization process and describes several important applications of this new lossless audio format in practice.
NoteY. Reznik: RealNetworks Inc.