[計算機概論]課程參與

• Data Mining: The area of computer science that deals with discovering patterns in collections of data
• Data warehouse: A static data collection to be mined
– Data cube: Data presented from many perspectives to enable mining

Data compression methods are either lossless (all information is recoverable) or lossy (some information is lost).

Data compression takes the original message and reduces the number of bits that are to be transmitted.

Data Compression Methods-->Lossless Methods(text or programs)-->Run-length
                                                          
                                                                                                   -->Huffman
                                                          
                                                                                                   -->Lempel Ziv
                           -->Lossy Methods(image,video,audio)-->JPEG
                                                        
                                                                                   -->MPEG