ITM 207 Lecture Notes - Lecture 3: Radix Point, Analog Signal, Digital Data

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Itm 207 data representation lecture 3 feb 2, 2017. Compression: lossless data can be retrieved without any loss of the original information, lossy means some information may be lost in the process of compaction. Analog and digital: analog continuous representation, analogous to the actual information it represents (e. g thermometer, digital data discrete representation, breaking the information into separate elements. Digitize: breaking data into pieces and representing those pieces separately. Electronic signal: analog signal continually fluctuates in voltage up and down, digital signal has only a high or low state, corresponding to the two binary digits, a digital signal is re-clocked to regain its original shape. Binary representations: one bit can be either 0 or 1, one bit can represent two things, two bits can represent four things. Ho(cid:449) (cid:373)a(cid:374)(cid:455) thi(cid:374)gs (cid:272)a(cid:374) (cid:862)n(cid:863) (cid:271)its (cid:396)ep(cid:396)ese(cid:374)t: 2^n. Real numbers: a whole part and a fractional part, positions are to the right of the decimal point are the tenths position.

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