On VLSI design of rank-order filtering using DCRAM architecture

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• 作者：Meng-Chun Lin ; Lan-Rong Dung
• 关键词：CMOS memory integrated circuits ; Coprocessors ; Image processing ; Median filters ; Nonlinear filters
• 刊名：Integration ; the VLSI Journal
• 出版年：2008
• 期刊代码：71_01679260
• 类别：et
• 出版时间：February 2008
• 卷：41
• 期：2
• 页码：193-209
• 文件大小：1465 K

摘要

This paper addresses on VLSI design of rank-order filtering (ROF) with a maskable memory for real-time speech and image processing applications. Based on a generic bit-sliced ROF algorithm, the proposed design uses a special-defined memory, called the dual-cell random-access memory (DCRAM), to realize major operations of ROF: threshold decomposition and polarization. Using the memory-oriented architecture, the proposed ROF processor can benefit from high flexibility, low cost and high speed. The DCRAM can perform the bit-sliced read, partial write, and pipelined processing. The bit-sliced read and partial write are driven by maskable registers. With recursive execution of the bit-slicing read and partial write, the DCRAM can effectively realize ROF in terms of cost and speed. The proposed design has been implemented using TSMC 1P6M technology. As shown in the result of physical implementation, the core size is and the VLSI implementation of ROF can operate at 256 MHz for 1.8 V supply.