国际上数字音视频编码标准主要有两大系列。一个系列由国际标准化组织(ISO)和国际电工委员会(IEC)制定,另一个系列由国际电信联盟(ITU)制定。制定这些标准的背景有所不同,面向的主要应用也有所区别,但有的标准或标准的某些部分为不同国际标准化组织及其标准共用,有的由不同国际标准化组织 International digital audio and video coding standard mainly has two major series. One series is set by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC), and the other series by the International Telecommunication Union (ITU). The backgrounds for developing these standards are different and the main applications are oriented differently, although some parts of standards or standards are shared by different ISOs and their standards and others by different ISOs