FPGA IMPLEMENTATION OF EFFICIENT VLSI ARCHITECTURE FOR FIXED POINT 1-D DWT USING LIFTING SCHEME

FPGA IMPLEMENTATION OF EFFICIENT VLSI ARCHITECTURE FOR FIXED POINT 1-D DWT USING LIFTING SCHEME

Durga Sowjanya1, K N H Srinivas2 and P Venkata Ganapathi3

1Research fellow, Sri Vasavi Engineering College, Tadepalligudem

2Head of the department in Sri Vasavi Engineering College, Tadepalligudem

3Venkata Ganapathi Puppala, Quartics Technologies Pvt Ltd, Pune

ABSTRACT

In this paper, a scheme for the design of area efficient and high speed pipeline VLSI architecture for the computation of fixed point 1-d discrete wavelet transform using lifting scheme is proposed. The main focus of the scheme is to reduce the number and period of clock cycles and efficient area with little or no overhead on hardware resources. The fixed point representation requires less hardware resources compared with floating point representation. The pipelining architecture speeds up the clock rate of DWT and reduced bit precision reduces the area required for implementation. The architecture has been coded in verilog HDL on Xilinx platform and the target FPGA device used is Virtex-II Pro family, XC2VP7- 7board. The proposed scheme requires the least computing time for fixed point 1-D DWT and achieves the less area for implementation, compared with other architectures. So this architecture is realizable for real time processing of DWT computation applications. 

KEYWORDS

Discrete wavelet transform (DWT), Lifting based scheme, field-programmable gate-array (FPGA), pipeline architecture, reduced bit precision, fixed point, VLSI architecture

Original Source Link : http://aircconline.com/vlsics/V3N4/3412vlsics04.pdf

http://airccse.org/journal/vlsi/vol3.html