The compressing principle and technique of multimedia data

With the widespread popularity of Internet,the demand for information,especially multimedia information has keep rising.To protect the large capacity multimedia data to transmit on the internet effectively,we must compress the multimedia data.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.The common compression on standards include of JPEG,MPEG and so on.