Efficient pass-parallel architecture for EBCOT in JPEG2000

Abstract

In this paper we propose an efficient architecture composed of pass-parallel context modeling scheme and low-cost pass switching arithmetic encoder (PSAE) for EBCOT entropy encoder used in JPEG2000. The pass-parallel context modeling scheme merges the three coding passes of bit-plane coding process into a single pass to improve the system performance. Instead of using three arithmetic encoders, the PSAE needs only one arithmetic encoder, and thus reduces the hardware cost. The proposed architecture therefore has three main advantages: 1) fast computation, 2) low internal memory accesses, and 3) compared with the conventional architectures it reduces 4K bits of internal memories. The experimental results show that the proposed architecture reduces the processing time by more than 25% compared with the previous methods.