What is Surround Processor ?

Surround Processor
The term "surround processor" refers to a stand-alone electronic component that would include an audio/video input switching section, a surround sound decoding section, and an output control section. Unlike an A/V receiver, these units do not include an AM/FM tuner or amplifiers for the loudspeaker system. Dedicated surround processors are normally preferred for higher performance systems due to their enhanced electronic circuitry, design features, and their ability to be upgraded to future surround sound formats.