Digital video technology is widely used in the field of communication, computer, radio and television. It brings the video conferencing, video telephony, digital television, media storage and a series of Applications, and promotes the generation of many video coding standard. ITU-T and ISO / IEC are two organizations which develop video coding standards. The ITU-T standards include the H.261,H.263, H.264, mainly used in the field of real-time video communication, such as video conferencing. MPEG standard series is developed by ISO / IEC, mainly used in the video store(DVD), radio and television, the Internet and Streaming Media on the wireless Internet. HEVC/H.265 (High-Efficiency Video Coding) standard is the latest video codec standard developed ISO / IEC and ITU-T together, which doubles the compression ratio comparing with the previous generation H.264/AVC standard in the same subjective quality. HEVC/H.265 is a hotspot of current research in the field of digital video.