Patent ID: 7164979

Claim:
A data transmission system having a sending unit and a receiving unit, the sending unit comprising: signal generating means for generating a signal that varies within a predetermined range; converting means for converting the signal having the predetermined range to generate a digital value with a resolution of K bits; compressing means for compressing the digital value generated by the converting means to generate a digital signal of L bits, wherein L is smaller than K; and sending means for sending the digital signal generated by the compressing means to the receiving unit, wherein the compressing means includes determining means for determining whether the digital value generated by the converting means is within a given range, wherein, when the digital value is outside the given range, the digital signal of L bits is generated by dividing the digital value by a first divisor, wherein, when the digital value is within the given range, the digital signal of L bits is generated by dividing the digital value by a second divisor, and wherein the first divisor is 2 (K-L) , while the second divisor is less than 2 (K-L) .