Information processing apparatus, decoding processing method and signal transmission method

A decoding processing method comprising the steps of:

• receiving a signal encoded in such a way that the signal containing a first bit value and a second bit value that are mutually different, wherein the first bit value is represented by a plurality of first amplitude values, the second bit value is represented by a second amplitude value that is different from the first amplitude values, a same amplitude value is not taken successively, and polarities of the amplitude values are reversed in each period;
• squaring amplitude values of the signal received in the signal receiving step;
• determining the first and second bit values based on the amplitude value of the signal squared in the amplitude square step;
• decoding an input data based on the bit values determined in the bit value determination step;
• and
• detecting a clock component of the signal by comparing the amplitude values of the signal before being squared with a predetermined threshold value without referencing a reference clock signal.

A signal transmission method comprising the steps of:

• generating an encoded signal X with a transmission speed Fb by encoding input data containing mutually different first and second bit values in which the first bit value is represented by an amplitude value 0 and the second bit value is represented by repetition of the amplitude values A and −A (A is any real number);
• adding a clock signal having an amplitude value n*A (n>1) and a frequency Fb/2 to the encoded signal X generated in the data encoding step;
• transmitting an encoded signal Y to which the clock signal is added in the clock addition step through a predetermined transmission line;
• receiving the encoded signal Y through the predetermined transmission line;
• squaring amplitude values of the encoded signal Y received in the signal receiving step;
• determining the first and second bit values based on the squared amplitude values of the encoded signal Y;
• decoding the input data based on the bit values determined in the bit value determination step;
• and
• detecting a clock component of the signal by comparing the amplitude values of the signal before being squared with a single predetermined threshold value without referencing a reference clock signal.