Smooth HD Video Playback with UVDATI Avivo HD technology is designed for high-end, high definition video playback in home theater systems. Free your CPU to power other applications with new UVD (Unified Video Decoder) hardware processing of HD video formats.UVD is a dedicated video decode processing unit on ATI Radeon HD 2000 series graphics processors that offloads both CPU and GPU rendering pipelines. UVD technology reduces power use, decreases system noise and increases notebook battery life during HD video playback.
quote: Continuing their video acceleration support ATI has built a Unified Video Decoder engine into the Radeon HD 2600 and HD 2400. The Radeon HD 2900 series does not have UVD; instead it uses the streaming processors to carry out the same functions.