An edge delta runlength (EDRL) expander circuit includes an EDRL stream
decoder. The symbols comprising EDRL streams are preferably entropy
encoded. In order to maintain symbol alignment the EDRL stream decoder
includes a barrel shifter that receives the encoded data stream and is
controlled by a feedback loop indicating symbol code length. In one
embodiment the feedback loop includes a modulo-n adder, where n is the
length of an input codeword bit pattern of the data stream.