Transformations of Independent Variable || Time Shifting || Time Scaling || Time Reversal || Ex 1.1

Example 1.1 || End Ch Q 1.21(a,b,c,d) (English)(Oppenheim)

0:00 - Intro
0:20 - What is Signal
0:45 - What is System
2:40 - Independent & Dependent Axis
3:30 - Two Types of Signals
6:05 - Signal Reversal
6:20 - Signal Inversion
7:40 - Time Shift
9:20 - Time Reversal
10:20 - Time Scaling
13:27 - Example 1.1

A central concept in signal and system analysis is that of the transformation of a signal.
Here we focus on a very limited but important class of elementary signal transformations that involve simple modification of the independent variable, i.e., the time axis.

A simple and very important example of transforming the independent variable of a signal
is a time shift.
A second basic transformation of the time axis is that of time reversal.
Another transformation is that of time scaling.

signals and systems, transformations, independent, variables,

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[manojbande]

Sir...in last problem descrete time signal only defined for integer(n) only...hence in x[3n+1] exist only at -1 and O only

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