Exploring Multi-Level Composition and Efficient MCM Schemes for an Energy-Efficient Wavelet Haar Architecture

This work explores multi-level fixed-point Haar transform compositions combined with MCM (multiple constant multiplication) schemes for an energy-efficient hardware architecture. We investigate a set of six lower-level Haar transforms for composing a Haar-9 architecture. The multiple-level Haar transforms use as a base M=1, M=2, and M=3 resolution levels. The processing module (PM) of the Haar explores efficient MCM schemes. The architectures were described in VHDL and synthesized employing the ST 65nm CMOS cell library. The results show that Haar-II architecture presents the lower circuit area results since this architecture requires fewer arithmetic operators. However, the most energy-efficient Haar-9 hardware architecture employs a combination of two M=2 with five M=1 blocks with a efficient MCM architecture reduced to only two arithmetic operators.

Realization of Visible Light Integrated Circuits for All-Optical Haar Transform

Photonic integrated circuits have been designed, simulated and tested on TriPleXTM platform technology for implementing optical Haar Transform (HT) in the visible spectrum. Optical circuits contain the new building block (BB) designed using the multimode interference (MMI) structure performing optical HT on a pair of the optical signals. The Outputs of the BB demonstrates the sum and subtraction of the input signals according to the HT operation. 1st-order and 2nd-order optical HT achieved for the green light input signals. Simulation and experimental results have successfully validated designed photonic circuits capability in implementing optical HT.