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Adaptive context tree weighting

O'Neill, Alex; Hutter, Marcus; Shao, Wen; Sunehag, Peter


We describe an adaptive context tree weighting (ACTW) algorithm, as an extension to the standard context tree weighting (CTW) algorithm. Unlike the standard CTW algorithm, which weights all observations equally regardless of the depth, ACTW gives increasing weight to more recent observations, aiming to improve performance in cases where the input sequence is from a non-stationary distribution. Data compression results show ACTW variants improving over CTW on merged files from standard...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Conference paper
Source: Data Compression Conference Proceedings
DOI: 10.1109/DCC.2012.38


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