System and method for extracting a data signal encoded onto first and second binary signals

An apparatus for extracting a data signal transmitted by a signal source that encodes the data signal onto first and second binary signals, the data signal and first and second binary signals each including a plurality of bits having a binary zero and a binary one state and where the data signal bits are encoded onto the first and second binary signals as a known two-bit binary state of the two signals taken together, comprising:

• first memory means storing a plurality of binary patterns representative of a known data address and a plurality of two bit binary state patterns, each representative of a data signal bit encoded onto the first and second binary signals;
• means for monitoring one of the first or second binary signals;
• first means, coupled to said monitoring means and said first memory means, for comparing the one monitored binary signal to the plurality of stored binary patterns in said first memory means;
• means, coupled to said first comparing means and to said first and second binary signals, for storing, if a match is found between the one monitored binary signal and the plurality of stored binary patterns in the first memory means, the respective binary states of the first and second binary signals in a second memory means as a plurality of two bit binary states;
• and,
• second means, coupled to said first and second memory means, for comparing the stored plurality of two bit binary states representative of the first and second binary signals against the plurality of stored two bit binary states patterns, and storing in a third memory means a binary code representative of said encoded data signal represented by each such match.