The impact of VLSI on signal processing

Signal processing and real time simulation which require large amounts of computation are discussed. General purpose computers are too costly for real time applications, and special purpose hardware is not flexible enough for research and development work. Traditionally, peripheral array processor (PAP) provide a cost effective compromise that combines large amounts of computation performed at a very high rate, at a reasonable cost, and without loss of generality or programmability. The PAPS are used as the baseline for the discussion of signal processing engines. New alternatives have emerged, such as the signal processor on a chip and numerous special purpose processing devices.