A Memory-Efficient High-Throughput Architecture for Lifting-Based Multi-Level 2-D DWT | IEEE Journals & Magazine | IEEE Xplore

A Memory-Efficient High-Throughput Architecture for Lifting-Based Multi-Level 2-D DWT


Abstract:

In this paper, we present a novel memory-efficient high-throughput scalable architecture for multi-level 2-D DWT. We studied the existing DWT architectures and observed t...Show More

Abstract:

In this paper, we present a novel memory-efficient high-throughput scalable architecture for multi-level 2-D DWT. We studied the existing DWT architectures and observed that data scanning method has a significant impact on the memory efficiency of DWT architecture. We propose a novel parallel stripe-based scanning method based on the analysis of the dependency graph of the lifting scheme. With the new scanning method for multi-level 2D DWT, a high memory efficient scalable parallel pipelined architecture is developed. The proposed architecture requires no frame memory and a temporal memory of size only 3 N +682 for the 3-level DWT decomposition with an image of size N ×N pixels with 32 pixels processed concurrently. The elimination of frame memory and the small temporal memory lead to significant reduction in overall size. The proposed architecture has a regular structure and achieves 100% hardware utilization. The synthesis results in 90 nm CMOS process show that the proposed architecture achieves a better area-delay product by 60% and higher throughput by 97% when compared to the best existing design for the CDF (Cohen-Daubechies-Favreau) 9/7 2-D DWT.
Published in: IEEE Transactions on Signal Processing ( Volume: 61, Issue: 20, October 2013)
Page(s): 4975 - 4987
Date of Publication: 24 July 2013

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