Data transmission device, data recepton device, and transmission method

A data transmission device that transmits transmission data converted into encoded operation data, using n-bit (n being k×m, k and m being natural numbers each equal to or greater than 1) signal lines,

• the data transmission device comprising:
• a first arithmetic operation unit that generates difference data that represents a difference between first data for m bits of the transmission data and second data for m bits of a previous set of the transmission data;
• an encoding unit that encodes the difference data and generates m-bit encoded data;
• and
• a second arithmetic operation unit that generates m-bit encoded operation data by adding the m-bit encoded data generated by the encoding unit to a previous set of the m-bit encoded operation data generated by the second arithmetic operation unit,
• the encoding unit performing encoding to associate the encoded data with the difference data in such a manner that the number of bit inversions with respect to encoded data associated with the difference data “0” becomes smaller as an absolute value of the difference data becomes smaller.

A data transmission device that transmits transmission data converted into encoded data, using n-bit (n being k×m, k and m being natural numbers each equal to or greater than 1) signal lines,

• the data transmission device comprising:
• an arithmetic operation unit that generates difference data that represents a difference between data for m bits of the transmission data and second data for m bits of a previous set of the transmission data;
• and
• an encoding unit that encodes the difference data and generates the m-bit encoded data,
• wherein an absolute value of the difference data associated with encoded data having 1 as the number of bit inversions with respect to encoded data associated with the difference data “0” is smaller than an absolute value of the difference data associated with encoded data having 2 or greater as the number of bit inversions with respect to the encoded data associated with the difference data “0”.

A data reception device that receives m-bit encoded data, using n-bit (n being k×m, k and m being natural numbers each equal to or greater than 1) signal lines,

• the data reception device comprising:
• a decoding table having the same contents as an encoding table used in generating the m-bit encoded data that is received;
• a decoding unit that decodes the received m-bit encoded data to form decoded data for m bits, using the decoding table;
• and
• an arithmetic operation unit that generates operation data for m bits as reception data by adding the decoded data for m bits generated by the decoding unit and previous operation data for m bits generated by the arithmetic operation unit,
• the encoding table associating data yet to be encoded with the encoded data in such a manner that the number of bit inversions with respect to encoded data associated with data “0” yet to be encoded becomes smaller as an absolute value of the data yet to be encoded becomes smaller.

A data reception device that receives m-bit encoded operation data, using n-bit (n being k×m, k and m being natural numbers each equal to or greater than 1) signal lines,

• the data reception device comprising:
• a second arithmetic operation unit that generates m-bit second encoded operation data, using the m-bit encoded operation data that is received and a previously received set of the m-bit encoded operation data;
• a decoding table having the same contents as an encoding table used in generating the received m-bit encoded operation data;
• a decoding unit that decodes the second operation data to form decoded data for m bits, using the decoding table;
• and
• a first arithmetic operation unit that generates first operation data for m bits as reception data by adding the decoded data for m bits generated by the decoding unit and previous first operation data for m bits generated by the first arithmetic operation unit,
• the encoding table associating data yet to be encoded with the encoded data in such a manner that the number of bit inversions with respect to encoded data associated with data “0” yet to be encoded becomes smaller as an absolute value of the data yet to be encoded becomes smaller.

A data transmission method for transmitting transmission data converted into encoded data, using n-bit (n being k×m, k and m being natural numbers each equal to or greater than 1) signal lines,

• the data transmission method comprising:
• operating to generate difference data that represents a difference between first data for m bits of the transmission data and second data for m bits of a previous set of the transmission data;
• and
• encoding the difference data to generate the m-bit encoded data,
• the encoding the difference data including performing encoding to associate the encoded data with the difference data in such a manner that the number of bit inversions with respect to encoded data associated with the difference data “0” becomes smaller as an absolute value of the difference data becomes smaller.