\begin{figure}[!t]
\centering
\includegraphics[scale=.9]{fig/ArchGeneral}
\caption{Huffman Encoder/decoder general architecture}
\label{fig:generalArch}
\end{figure}
\begin{figure}[!t]
\centering
\includegraphics[width=.5\textwidth]{fig/encoder}
\caption{Huffman encoder internal architecture}
\label{fig:encoder}
\end{figure}
\begin{figure}[!t]
\centering
\includegraphics[width=.5\textwidth]{fig/decoder}
\caption{Huffman decoder internal architecture}
\label{fig:decoder}
\end{figure}