Performance optimized predictor blending technique for lossless image coding

Ulacha, G.; Stasinski, Ryszard

doi:10.1109/icassp.2011.5946788

Cited by 13 publications

(6 citation statements)

References 8 publications

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“…Initially matrix R and vector p are equal to zero, inversion of R starts for n much higher than the predictor rank r, in our case in 100-th iteration, while r = 20 (r L = 10, r R = 10). The method was succesfully applied to lossless coding of images [17], [18].…”

Section: B Ols Methodsmentioning

confidence: 99%

Lossless OLS-NLMS algorithm for audio coding

Ulacha

Stasinski

2014

2014 International Conference on Signals and Electronic Systems (ICSES)

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In the paper a lossless audio coding backward adaptation algorithm consisting of cascaded OLS and NLMS sections is presented. The technique performance is compared to that of 4 other lossless codecs, including MPEG-4 ALS one, and it is shown that indeed, the new method is the best one. Entropy coder is an advanced adaptive Golomb one supported by arithmetic coders reducing redundancy of its output.

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Section: B Ols Methodsmentioning

confidence: 99%

Lossless OLS-NLMS algorithm for audio coding

Ulacha

Stasinski

2014

2014 International Conference on Signals and Electronic Systems (ICSES)

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“…In our case it is the 100-th iteration, as the optimal rank of OLS predictor appears to be r = 20 (r L = 10, r R = 10). Previously, the method was successfully applied to lossless coding of images [23], [24]. Computational complexity of OLS is clearly higher than that of any RLS algorithm, nevertheless, the used here predictor ranks are much smaller than those of the following NLMS filters, so this is not of great importance for the complexity of the whole method.…”

Section: B Ols Methodsmentioning

confidence: 99%

Entropy Coder for Audio Signals

Ulacha¹,

Stasinski²

2015

International Journal of Electronics and Telecommunications

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In the paper an effective entropy coder designed for coding of prediction errors of audio signals is presented. The coder is implemented inside a greater structure, which signal modeling part is a lossless coding backward adaptation algorithm consisting of cascaded Ordinary Least Squares (OLS), three Normalized Least Mean Square (NLMS), and prediction error bias correction sections. The technique performance is compared to that of four other lossless codecs, including MPEG-4 Audio Lossless (ALS) one, and it is shown that indeed, on the average the new method is the best. The entropy coder is an advanced context adaptive Golomb one followed by two context adaptive arithmetic coders.

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“…In the solution proposed here, which is an extension of the codec from work [16], the prediction order in the middle NLMS block has been increased from r = 25 to r = 380. Instead of the OLS block, an improved version of OLS+ has been introduced, whose simplified version has been successfully used earlier in lossless image compression [30,31].…”

Section: Ols+mentioning

confidence: 99%

A High Efficiency Multistage Coder for Lossless Audio Compression using OLS+ and CDCCR Method

Ulacha

Wernik

2019

Applied Sciences

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In this paper, the improvement of the cascaded prediction method was presented. Three types of main predictor block with different levels of complexity were compared, including two complex prediction methods with backward adaptation, i.e., extension Active Level Classification Model (ALCM+) and extended Ordinary Least Square (OLS+). Our own approach to implementation of the effective context-dependent constant component removal block is also presented. Additionally, the improved adaptive arithmetic coder with short, medium and long-term adaptation was presented, and the experiment was carried out comparing the results with other known lossless audio coders against which our method obtained the best efficiency.

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Performance optimized predictor blending technique for lossless image coding

Cited by 13 publications

References 8 publications

Lossless OLS-NLMS algorithm for audio coding

Lossless OLS-NLMS algorithm for audio coding

Entropy Coder for Audio Signals

A High Efficiency Multistage Coder for Lossless Audio Compression using OLS+ and CDCCR Method

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