The document provides an overview of the High Efficiency Video Coding (HEVC) H.265 standard. It discusses the need for improved video compression standards due to increasing video content and limited bandwidth. HEVC was developed to meet this need by providing around 50% better compression over its predecessor H.264 while still maintaining high video quality. The document describes the various techniques used in HEVC such as improved block partitioning, transform sizes, prediction modes, and entropy coding that help achieve its compression gains. Both hardware and software implementations of HEVC decoders and encoders are discussed.