An automated test system for a device under test (DUT) compresses the stimulus waveform before transferring it to a storage device or over a data transfer interface. The compressed stimulus waveform data are decompressed, and if required converted to analog form, then applied as a stimulus to the DUT....http://www.google.de/patents/US7486205?utm_source=gb-gplus-sharePatent US7486205 - Compression and decompression of stimulus and response waveforms in automated test systems
