function Ds = scrambler(D)
    Ds = zeros(length(D), 1);
    x = zeros(17, 1);
 
    last_count = 0;
    invert = 0;

    for i = 1:length(D)
        % Note 2: invertor
        if invert == 1
            D(i) = ~D(i);
            invert = 0;
        end

        Ds(i) = bitxor(D(i), bitxor(x(14), x(17)));

        % Note 2: detector
        if Ds(i) == 1
            last_count = last_count + 1;
        else
            last_count = 0;
        end
        if (last_count >= 64)
            invert = 1;
        end

        x = rshift(x);
        x(1) = Ds(i);
    end