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Improved Forward-Adaptive Prediction for MPEG-4 Audio Lossless Coding
Citation key 0746Liebchen2005
Author Tilman Liebchen and Y. Reznik
Title of Book 118th AES Convention
Year 2005
Address Barcelona
Month may
Note Y. Reznik: RealNetworks Inc.
Abstract MPEG-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.
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