Low complexity reconfigurable architecture for the 5/3 and 9/7 discrete wavelet transform

1 .INTRODUCTIONThe discrete wavelet transform(DWT) is widely usedin many applications such as signal analysis and pro-cessing,as well asi mage compression,and adoptedtobecome an ingredient in many i mage compressionstandards ,such as JPEG2000 etc . This is because theDWTcan decompose the signals into different subba-nds with both ti me and frequency information and fa-cilitate to arrive a high compression ratio. Lifting-based wavelet1 ,2]is also called as the secondly genera-tion wave…

Low complexity reconfigurable architecture for the 5/3 and 9/7 discrete wavelet transform

Efficient reconfigurable VLSI architecture for 1-D 5/3 and 9/7 wavelet transforms adopted in JPEG2000 proposal, based on lifting scheme is proposed. The embedded decimation technique based on fold and time multiplexing, as well as embedded boundary data extension technique, is adopted to optimize the design of the architecture. These reduce significantly the required numbers of the multipliers, adders and registers, as well as the amount of accessing external memory, and lead to decrease efficiently the hardware cost and power consumption of the design. The architecture is designed to generate an output per clock cycle, and the detailed component and the approximation of the input signal are available alternately. Experimental simulation and comparison results are presented, which demonstrate that the proposed architecture has lower hardware complexity, thus it is adapted for embedded applications. The presented architecture is simple, regular and scalable, and well suited for VLSI implementation.