MGMT 1030 Lecture Notes - Lecture 16: Negative Number, Hertz, Binary Number
6 May 2018
School
Department
Course
Professor
MGMT 1030 Tutorial 16 Notes – Positive Peak
Introduction
• The largest possible sample, which represents the positive peak of the loudest possible
sound, is set to the maximum positive binary number being used, and the most negative
peak is set to the largest negative number.
• Binary 0 falls in the middle.
• The amplitude scale is divided uniformly between the two limits.
• The sampling rate is chosen to be high enough to capture every nuance in the signal
being converted.
• For audio signals, the sampling rate is normally around 50 kilohertz, or fifty thousand
times a second.
• The basic technique is illustrated
• A typical audio signal is shown in the upper diagram.
• A portion of the signal is shown in expanded form below.
• I this diaga, the sigal is alloed to fall etee − ad .
• Although e hae’t disussed the representation of negative numbers yet, the
oseutie alues fo the sigal i this diaga ill e the iay euialets to −22,
−, +2, 2, 9, ad 2.
• The A-to-D conversion method is discussed more thoroughly
• Within the computer, most programs would probably treat this data as a one-
dimensional array of integers.
• Like graphics images, however, it is necessary to maintain, store, and transmit metadata
about the waveform, in addition to the waveform itself.
• To process and reproduce the waveform, a program would have to know the maximum
possible amplitude, the sampling rate, and the total number of samples, at the very
least.
find more resources at oneclass.com
find more resources at oneclass.com
