EECS 1520 Chapter Notes - Chapter 3: Moving Picture Experts Group, Gang Of Youths, Portable Network Graphics

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1520
• Professor: Roger Lew

Document Summary

Data can be unstructured and lack context. Information helps us answer questions (it informs). Information: data that has been organized or processed in a useful manner. Data compression: reducing the amount of space needed to store a piece of data. Bandwidth: the number of bits or bytes that can be transmitted from one place to another in a fixed amount of time. Compression ratio: the size of the compressed data divided by the size of the uncompressed data. Computers store, present, and help modify many different types of data: numbers, text, audio, images and graphics, and video. Ultimately, all this data is stored as binary digits. The ratio should result in a number between 0 and 1, the closer the ratio is to zero, the tighter the compression. Lossless compression: a data compression technique in which there is no loss of information. Lossy compression: a data compression technique in which there is loss of information.