Patent ID: 8644417

Claim:
A method for data transmission, comprising the steps of: (a) encoding a data signal to be transmitted into first, second, third and fourth quaternary signals in accordance with an encoding table, wherein the data signal is characterized with a stream of binary data segments each of which has a data length of three bits comprising a first bit, a second bit and a third bit, thereby corresponding to one of eight binary permutations of the first, second and third bits; and wherein the first, second, third and fourth quaternary signals are configured such that each of the first, second, third and fourth quaternary signals has four signal levels, and at the same time each of the first, second, third and fourth quaternary signals has a signal level different from that of the other three of the first, second, third and fourth quaternary signals, whereby the signal levels of the first, second, third and fourth quaternary signals have twenty-four quaternary permutations; (b) transmitting simultaneously the first, second, third and fourth quaternary signals through first, second, third and fourth data transmission channels, respectively; and (c) decoding the transmitted first, second, third and fourth quaternary signals into the data signal, comprising: comparing the transmitted first and second quaternary signals to obtain the first bit of each binary data segment of the data signal; comparing the transmitted first and third quaternary signals to obtain the second bit of each binary data segment of the data signal; and comparing the transmitted first and fourth quaternary signals to obtain the third bit of each binary data segment of the data signal.