Cache misses and energy-dissipation results for JPEG-2000 filtering

After its establishment as a new standard for still-image coding, JPEG-2000 is now in the stage of the exploration for efficient implementation in real-life systems. In this paper we focus on the implementation of the frontend part, i.e. the filtering processes performed by the discrete wavelet transform (DWT). The target platforms are programmable processors, since the modern evolution of their design positions them as good alternatives for efficient, flexible and fast time-to-market designs. As a result, to facilitate the incorporation of the new standard in such designs, we present experimental and theoretical results for the data-related cache misses that occur during the DWT, since it has been shown that these comprise the main bottleneck in this type of application. In addition to this, we also rank the presented designs with respect to the power efficiency, under a high-level power estimation scheme. To validate our models, apart from the simulation results, indicative experimental results are presented in superscalar and VLIW real-life architectures.