VLSI Implementation Of High-throughput JPEG2000 Image Encoder

JPEG2000 is a new static image compression standard which provides many critical advantages,including superior lower bit rate compression performance,support for both lossy and lossless compression,progressive transmission and region of interest coding.Because of these advantages,JPEG2000 has important applications in many fields.However,if JPEG2000 algorithm is implemented in software,the high complexity would restrict the overall image processing speed severely.Therefore,in order to improve the overall coding performance,it is of great significance to strengthen the research on JPEG2000 hardware implementation and optimization.Due to the in-depth study of JPEG2000 standard image compression algorithm,the VLSI implementation of the overall JPEG2000 image encoding system is proposed in this paper.The JPEG2000 encoder is mainly composed of two parts: DWT module and EBCOT module.For DWT module,the basic theory and the development of discrete wavelet transform(DWT)are introduced and two different multi-level DWT architectures are proposed in this paper.The two multi-level architectures adjust the order of input data and use the internal folded structure to ease the mismatch problem between clock and data in the unfolded structure,and increase the hardware efficieny of the system.Besides,the JPEG2000 encoder in this paper adopts the deep parallel multi-level DWT architecture with higher hardware efficiency for DWT module.For EBCOT module,the parallel EBCOT architecture is designed according to the multi-level DWT structure,which greatly improves the throughput of JPEG2000 encoder.Meanwhile,the main modules of EBCOT Tier1,BPC encoder and MQ encoder are also implemented and optimized.Based on the optimizations and parallel design of the above modules,the coding performance of the JPEG2000 encoder has been greatly improved.This design has been modeled with Verilog HDL,and verified on FPGA platform by image compressing.The verification results show that the design optimizes and implements the image compression function conforming to JPEG2000 standard.