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Showing posts with the label Signal Processing

How to visualise shifting of a time-reversed signal?

Shifting, reversal and scaling are the common operations we perform on an analog (or) digital signal. In this post, we will see how can we visualize shifted version of a time-reversed signal. To put it simply, here is what we are gonna do: Given a signal x(t) , how to plot x(-t+1) Note: If you are already good at this, maybe this post is not for you. You can safely stop reading now. But if you still want to proceed, you are always welcome!! Before discussing how to plot our signal, let's have a small talk about - Time Shifting: For a given x(t) , we can say that x(t+1) is a time-shifted signal. In general, we talk about the shifting of the waveform relative to the time axis, and we use the terms "left shift" and "right shift" to denote two types of movements possible for the waveform. However, we have to note that the terms indicate only half the story. There is an underlying assumption for these to work, which is the dir...

Speech Signal Processing - Power Point (Ft. Lawrence and Schafer)

                        Now-a-days, one can observe many applications of Speech Signal Processing. Our voice assistants are just a part of many applications.                   If you are interested to learn about Speech Signal Processing or want to know about what it is, you are in the right place..!                Prepared from the first few chapters of the book called "Digital Processing of Speech Signals", by authors Lawrence R . Rabiner and Ronald W. Schafer (who are MIT graduates!), the PPT can serve as an introduction to the speech signal processing...                    There are even many other books authored by these signal processing experts. Don't forget to check them too...(click here for the works of Prof. Lawrence)...