A method of encoding and an encoder are provided. The method includes generating first one-hot bits for most significant bits (MSBs) and second one-hot bits for least significant bits (LSBs) using input one-hot bits; encoding the first one-hot bits to the MSBs and complementary MSBs through a first logical operation using a cross-connection; and encoding the second one-hot bits to the LSBs and complementary LSBs through a second logical operation using a cross-connection. The encoder includes a first bit generator, a first encoder, a second bit generator and a second encoder.