According to the redundancy in space,time,structure,vision and knowledge,multimedia data such as images,audio frequency,video are compressed by the loss and lossless compression.

• 针对多媒体数据在空间、时间、结构、视觉、知识等方面所产生的冗余；利用有损压缩和无损压缩方法；对图像、音频、视频等多媒体数据进行压缩；形成联合图像专家组JPEG、运动图像专家组MPEG、H.