H.265 is a new video coding standard developed by ITU-T VCEG after H.264. The H.265 standard revolves around the existing video coding standard H.264 (the video coding standard is mainly used in the field of real-time video communication, such as conference television; the MPEG series of standards is developed by ISO/IEC and is mainly used in video storage (DVD ), radio and television, streaming media on the Internet or wireless networks, etc.), retaining some of the original technologies while improving some related technologies. The new technology uses advanced technology to improve the relationship between code stream, encoding quality, delay and algorithm complexity to achieve optimal settings. Specific research contents include: improving compression efficiency, improving robustness and error recovery capabilities, reducing real-time delay, reducing channel acquisition time and random access delay, reducing complexity, etc. Due to algorithm optimization, H264 can realize standard definition digital image transmission at a speed lower than 1Mbps; H265 can realize 720P (resolution 1280*720) ordinary high-definition audio and video transmission using a transmission speed of 1~2Mbps.
In August 2012, the first H.265 codec was released, and just six months later, the International Telecommunication Union (ITU) officially approved the HEVC/H.265 standard. The full name is High Efficiency Video Coding. It has been greatly improved compared to the previous H.264 standard. China's Huawei holds the most core patents and is the leader of this standard.
H.265 is designed to transmit higher-quality online videos under limited bandwidth. It only requires half the original bandwidth to play the same quality video. This also means that our smartphones, tablets and other mobile devices will be able to directly play 1080p full HD videos online. The H.265 standard also supports both 4K (4096×2160) and 8K (8192×4320) ultra-high definition videos. It can be said that the H.265 standard allows online videos to keep up with the "high resolution" of display screens.