Digital Signal Processors – (DSP) - DSPs manipulate high-speed information, such as radio, sound or video signals. DSPs can also filter interference from radio signals or telephone transmissions.

Digital Signal Processing - (DSP) - Digital Signal Processing is the science of using computers to understand signal data. Signal data includes radar and sonar echoes, voltages generated by the heart and brain, seismic vibrations and a lot more.  http://en.wikipedia.org/wiki/Digital_Signal_Processing