A high-efficiency reconfigurable 2-D Discrete Wavelet Transform engine for JPEG2000 implementation on next generation digital cameras

In this paper, we present a high-efficiency reconfigurable lifting-based 2-D Discrete Wavelet Transform (DWT) engine targeting next generation digital cameras. The engine is implemented on a newly emerging Dynamically Reconfigurable (DR) processor architecture that offers superior performance advantages on mobile devices. The 2-D DWT engine can be reconfigured for both 5/3 and 9/7 modes. The scanning pattern of DWT is modified in order to better adapt the JPEG2000 standard. Vector Operations (VO) with Single Instruction Multiple Data (SIMD) techniques are introduced to explore expected system performance improvements, while the architecture can be easily reconfigured between different working modes. Simulation results demonstrate that the resulting 2-D DWT architecture provides high throughput that reaches up to 53 fps for a 2048×1024 image, which shows its advantage compared to some FPGA implementations.