TTHD Technology is an innovative suitE of advanced video enhancement technologies that deliver unsurpassed quality for DVD movies on PC-based home-theater systems. TTHD fills the gap between standard resolution content and high-definition display capabilities, Boosting DVD video quality to achieve HD-like results and smoother playback. TTHD enables you to enjoy high definition display. The innovative drive E-Green Engine technology features an E-Green Mode that automatically closes drive applications when not in use to help conserve energy - helping the environment by decreasing CO2 emissions and reducing the depletion of trees.