ITM 301 Lecture Notes - Lecture 3: Lossless Compression, Lossy Compression, Digital Data
15 Mar 2018
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One bit can represent two things, two bits can represent 4, 3 bits can represent 9, etc. How many things can you represent with 8 bits: 2^8 = 256. Information: data that has been organized or processed in a useful manner. Multimedia: several different media types (numbers, text, audio, images, video) Data compression: reducing the amount of space needed to store a piece of data. Compressed ratio: the size of the compressed data divided by the size of the uncompressed data. Lossless compression: data compression technique where there is no loss of information. Bandwidth: the number of bits or bytes that can be transmitted from one place to another in a fixed amount of time. Analog data: a continuous representation of data: continually fluctuates up and down in voltage. 96+6=2 raised to k minus i (k= number of digits) Ten"s complement: a representation of negative numbers such that the negative of ) us (cid:883)(cid:882)
