High Quality Content by WIKIPEDIA articles! X-Video Bitstream Acceleration (XvBA), designed by AMD for its (ATI) Radeon GPU and Fusion APU, is an arbitrary extension of the X video extension (Xv) for the X Window System on Linux operating-systems. XvBA API allows video programs to offload portions of the video decoding process to the GPU video-hardware. Currently, the portions designed to be offloaded by XvBA onto the GPU are motion compensation (MC) and inverse discrete cosine transform (IDCT), and variable-length decoding (VLD) for MPEG-2, MPEG-4 AVC (H.264) and VC-1 encoded video.