A Design for Two-Dimensional Non-Causal Deslauriers-Dubuc Discrete Wavelet Transformation for Real-Time Video Processing on FPGA

Abstract

In this paper, an efficient implementation for two-dimensional non-causal Deslauriers-Dubuc discrete wavelet transformation using the lifting scheme for real-time video processing is proposed. Firstly, a two-dimensional discrete Deslauriers-Dubuc wavelet transformation for decomposition with outputs as the approximation, horizontal details, vertical details and diagonal details of the input frames and inverse discrete wavelet transformation for reconstruction of the decomposed video stream is implemented on the Simulink HDL coder platform. The method with FIFO and counter logic provides serial data to the wavelet transform module, which reduces the delay time as compared to the prior approach of the delay line [1]. The implementation addresses the solution for problems related to serial processing by non-causal wavelet filters and delay in the output frame display. Later, the Simulink model is tested on the Terasic Intel/Altera DE2i-150 board and applied to processing of real-time video supplied by a Terasic 5 MPixel digital camera at the rate of 15 frames per second.