Parallel Framework for Real-time DSP Implementation of EBC Algorithm

JPEG2000, the state-of-the-art image compression standard, has many advantages, such as high compression efficiency and high image fidelity. However, because of its high computational complexity, real-time hardware implementation of JPEG2000 becomes a big problem when using it in deadline constrained applications. EBC algorithm is the main part of JPEG2000 which comprises more than 50% of the computational complexity. Aiming at the shortcut of the EBC framework which is not suitable for the establishment of DSP software pipeline, a parallel framework for real-time DSP implementation of EBC algorithm is proposed in this paper. The original bit-plane coding module is firstly partitioned into bit-plane scanning module and arithmetic coding module. Then the sign coding is separated from the bit-plane scanning module and implemented ahead. And the multiple loops of the bit-plane scanning module are unrolled with context combining. By these optimizations, the software pipeline of the EBC algorithm can be established which leads to an eight-time faster implementation speed.