Hardware architecture for data concealment using sub-band coding, LSB coding and pseudo-random bit stream generators

Data concealment using LSB coding is a simple algorithm for hiding data within audio. This paper firstly extends the algorithm to alleviate frequency offset effects, then applies the technique to a multi-rate filterbank, and reports the results of a VLSI implementation for the system. The architecture has been designed to give real time performance and consequently has high efficiency, whilst maintaining audio fidelity through careful analysis of wordlength and other effects. In this paper, we also consider the feasibility of the selected implementation approach