Title: A new embedded image compression scheme using rate-distortion optimised block coding of wavelet coefficients

Authors: Chang Mo Yang; Kwangsue Chung

Addresses: Smart Media Research Center, Korea Electronics Technology Institute, 9FL, Electronics Center, #11, World cup buk-ro 54-gil, Mapo-gu, Seoul 121-835, Korea ' Department of Communications Engineering, Kwangwoon University, 20, Gwangun-ro, Nowon-gu, Seoul 139-701, Korea

Abstract: In this paper, we propose a new embedded image compression scheme which uses rate-distortion optimised block coding (RDBC) of wavelet coefficients. Unlike conventional embedded compression schemes which use the set partition or block partition coding methods according to the magnitude of wavelet coefficients, the proposed scheme achieves rate-distortion optimisation by ordering wavelet coefficients or blocks according to their expected rate-distortion slopes. In addition, the proposed scheme uses a modified block partition method and new context models for the entropy coding. Experimental results demonstrate that the proposed scheme not only produces embedded bit-streams but also outperforms existing embedded compression schemes.

Keywords: block partition coding; embedded image compression; rate-distortion optimisation; RDBC; rate-distortion optimised block coding; wavelet.

DOI: 10.1504/IJAMC.2017.089342

International Journal of Advanced Media and Communication, 2017 Vol.7 No.3, pp.181 - 196

Available online: 11 Jan 2018 *

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