VLSI Implementation of Error Tolerance Scheme for DWT in JPEG 2000 Encoder

Abstract

The JPEG 2000 image compression standard i designed for a broad range of data compression applications. The discrete wavelet transformation (DWT), central to the signal analysis and important in the JPEG 2000, is quite susceptible to computerinduced errors. The errors can be spread to many output transform coefficients if the DWT is implemented by using lifting scheme. This paper proposes an efficient error tolerance scheme (ETS) to detect errors occurring in DWT and also implemented Pipeline based DWT in VLSI using Field Programmable Gate Array (FPGA). A pipelinebased DWT structure is also developed in this paper to speed up the error detection process. Some standard images are used as test samples to verify the feasibility of the proposed ETS design. Experimental results and comparisons show that the proposed ETS has good performance in error detection time and error tolerance capability.