MPEG-4是一套用于音频、视频信息的压缩编码标准，由国际标准化组织(ISO)和国际电工委员会(IEC)下属的“活动图像专家组”（Moving Picture Experts Group，即MPEG）制定，第一版在1998年10月通过，第二版在1999年12月通过。MPEG-4格式的主要用途在于网上串流及光碟分发，语音传送（视频电话），以及电视广播。-MPEG-4 is a set for audio, video compression coding standard by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) subsidiary' s " Moving Picture Experts Group"　(Moving Picture Experts Group, or MPEG) to develop, the first an edition in October 1998 passed, the second edition in December 1999 adopted. MPEG-4 format, the primary purpose is to online streaming and CD distribution, voice transmission (video phone), as well as television broadcasting.