Digital signal/noise ratio amplifier apparatus for a communication system

In a communication system including a transmitter, a receiver and a communication channel, a signal modifier apparatus associated with said transmitter comprising:

• sampler means responsive to an input signal to be transmitted through said communication channel for deriving a series of samples representative of a segment of said input signal;
• analog-to-digital converter means for converting each sample to a digital sample value;
• first means responsive to said digital sample values for subtracting a first predetermined digital value M.sub.1 thereof to derive digital values representative of deviations of said input signal from said first predetermined value M.sub.1 ;
• second means for determining with said digital values representative of deviations a common factor K with K>I;
• third means for multiplying each of said representative digital values by said common factor K to derive corresponding amplified digital values;
• fourth means for adding a second predetermined digital value M.sub.2 to each of said amplified digital values to derive corresponding augmented digital values;
• digital-to-analog converter means for converting said augmented digital values into an intermediary analog signal;
• said transmitter transmitting said intermediary analog signal through said communication channel.