Unfortunately the interface for the digital version of this book is very awkward. I purchased the paper version of the book, and has proved to be quite useful. Hopefully the technology behind the web interface for digital books that Amazon employs will improve soon, as this method of accessing reference books makes perfect sense. Currently, however, I would steer away anyone thinking of purchasing a digital book of this kind, who is intending to use the web interface.

This book is mostly composed of formulas and math. It gives little background information on the reasons/motivations for the formulas. I would not recommend this if you are new to digital signal processing.

This book is mostly composed of formulas and math. It gives little background information on the reasons/motivations for the formulas. I would not recommend this if you are new to digital signal processing.

The book came fast, was much cheaper than a new book, and its quality was practically new.

This text was recommended as a companion to Oppenheim's "Discrete Time Signal Processing" for a senior DSP filtering course. If your school is like mine, you sit in three hours of lecture a week, nodding and agreeing and feeling like DSP is straightforward and intuitive. Then you sit down to do your homework and wonder, "where did this come from?" Schaum's helps to bridge this gap with compartmentalized topics and numerous examples. The sections help you quickly ascertain how the notation translates and how thoroughly the topic is covered relative to the coursework. The examples help because, let's face it, it helps to see certain types of problems worked through from start to finish. There are many, many examples within the sections and at the end of the sections, worked through in minute detail. If you're into or studying DSP as a senior engineering student, if you're not the top dog in your class but still want to do well, if you learn from examples and from working through many problems that you're able to confirm, then this book is for you. If you're looking for a "solutions manual" type of book, if you want a "cliff notes" type companion, or if you don't understand lecture concepts at all, then this book won't help you much. It's not an introductory text, although it covers introductory concepts, in my opinion there's not enough background on the rudimentary DSP topics to truly qualify as introductory.

Look, to an engineering mind, the processing of samples at a certain rate is really straight forward and can be mastered in a couple years at any decent engineering firm.

Now there are concepts (useful abstractions...organic way of thinking) that will probably allude such a mind (machine way of thinking) in such a situation, but certainly ease one's solving of problems.

Unfortunately, these useful abstractions are not covered in this text. As far as I've seen, most DSP literature--this book is a good example--either never mentions or else completely obscures such useful abstractions through the inclusion of a huge number of useless and even harmful ones. Abstractions, that is. In short, this text is a student mind-control/brainwashing tool.

Moreover, as a Schaum's outline, this hidden purpose is reprehensible. Most Schaum's outlines serve as illuminators of the useful abstraction. Not this one. And so (tongue-firmly-in-cheek) DSP by Hayes can really only serve in the understanding of academic deception at institutions like MIT (Hayes is MIT^3: BS, MS, PHD) and GATECH (Hayes works there).

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After some reflection, let me add the idea of "leaky abstractions."
In a sense, no abstraction is truly DRY, all leak a little bit, all subject to cross-cutting concerns. But in the case of Dr's Hayes's Outline, the abstract leakiness factor is far from a fixable plumbing problem and more towards one h-ll of a pss-poor construction.

This is perhaps the worst Schaum's Outline ever. Reading this text makes breathtakingly clear the fact that its author has some sort of academic coprophilic [...]. Just FYI: the DSP school of thought is simply the intellectual high-jacking of digital signals and systems. If you're searching for meaning and depth in digital signals and systems, look elsewhere. Maybe read a few choice TI (Texas Instrument) Application Notes (search the web or simply try and talk with someone at TI or another digital signals firm if you are a good student from a good school with a good story, chances are very good that some practicing engineer at one of these firms will happily spend a few minutes or maybe even longer giving you a few pointers. Those were my experiences, anyway.). Or just re-read your Sophomore/Junior course notes on Signals and Systems (paying close attention to the foundations of the z-transform).

This is perhaps the worst Schaum's Outline ever. Reading makes it clear that the author has some sort of academic coprophilic [...]. Just FYI: the DSP school of thought is just the intellectual high-jacking of digital signals and systems. If your looking for meaning and depth in digital signals and systems, look elsewhere. Read TI (Texas Instrument) Application Notes. Or just re-read your Sophomore/Junior course on Signals and Systems (paying close attention to foundations of the z-transforms).

This book is a carefully written one which will enable any student to revise thoroughly before DSP exam. It has an outstanding collection of solved problems like most other Schaum's outlines. This book is to be used as a supplement book to any standard DSP book like Oppenheim or Proakis & Manolakis. This book can make quite a lot of difference in final grades of most of students. So, it is advisable for any UG/PG to revise this book well before exam.

This book is a carefully written one which will enable any student to revise thoroughly before DSP exam. It has an outstanding collection of solved problems like most other Schaum's outlines. This book is to be used as a supplement book to any standard DSP book like Oppenheim or Proakis & Manolakis. This book can make quite a lot of difference in final grades of most of students. So, it is advisable for any UG/PG to revise this book well before exam.

This outline could never stand alone as a DSP tutorial, but it is excellent if you need extra problems to solve or if you need a refresher course in elementary DSP topics. Chapter one starts where any DSP course usually starts - with a quick review of signals and systems. Chapter two is on Fourier analysis and discusses all of the basics including the concept of filtering, interconnection of systems, and finally the discrete time Fourier transform and its properties. Chapter 3 is on sampling, and includes a good discussion of analog to digital conversion and how it can induce aliasing. Next the converse, digital to analog conversion, is discussed as well as discrete time processing of continuous signals and finally sample rate conversion. Chapter 3 is especially useful, since most DSP texts do not go into as much detail on practical A/D and D/A conversion topics as this chapter does. Chapter four finally gets into the z-transform - its definition, its properties, and its inverse. Chapter 5 is about the transform analysis of systems and specifically how the z transform makes the analysis of such systems much simpler than what was done in earlier chapters. Chapter six discusses the discrete Fourier transform, which is a finite-series version of the DTFT, which was discussed in chapter two. Because the Discrete Fourier Transform has a time complexity of NxN, the next chapter discusses its more practical alternative the Fast Fourier Transform, which has an NlogN time complexity. This might seem trivial at first, but if you are filtering 1Kx1K pixel images, the difference becomes significant. Although this chapter is very brief, it does a pretty good job of driving home the main points of the algorithm. Also, it has some pretty good exercises on the FFT, which are usually hard to find in textbooks. Now that all of the groundwork has been laid, chapter eight discusses the implementation of discrete time systems, which is the essence of DSP. Common filter structures are introduced. Chapter 9, the final chapter, is on filter design. Both IIR and FIR filter techniques are introduced. Thus, if you are in an advanced DSP course, this outline will probably be too elementary for you. For first semester students, this should be a very helpful outline for transitioning from the study of linear systems to DSP.

it was delivered in good condition and quite fast. As promised on the site.

This book is intended to serve as a supplement for an EE DSP course, which probably uses one of the texts listed above. If you want to self-study DSP I recommend the Steve Smith book (available in print or on his website) as a place to get started.
The best areas of Dr. Hayes' book are its treatement of sampling (better than John Proakis' book), z-transforms and DFT. I think the FFT treatment was okay and the filter design at the end was a little light, but that is okay since this is really intended for a first semester course. The main purpose of all the Schaum's books is to provide more worked out examples of tricky material and Hayes' book serves the purpose. One final thing, in the introduction, the author says to check out his website that has errata listed, but I typed the address in and got an "under construction" message.

... of course that could be because my professor gave tests from some of the sample problems in here.. :) But the book was done very well, I thought. It was a great suppliment to our textbook, which was the Digital Signal Processing book written by Leland Jackson (that's Jackson's red book, rather than the infamous Jackson's blue book). The solved problems were very helpful.

I will admit that when I first picked this book up I hated it. By the bottom of page two I was already lost.

However to be fair, I did not have the background to read this book. After taking two courses on DSP now, 1 basic and the other on advanced digital filters, I can honestly say I have used this book the most. Not only are there about 50 worked out problems at the end of each chapter, there are even examples during the brief explanation of each chapter.

This book as others have said will not stand alone, meaning if this is the only book you plan to buy on DSP, you will never understand it. This is of course typical of all Schaums books, and is preferable. By the time you get this book you should understand what a discrete time signal is (meaning is mathematical representation Sigma/summation etc) as well as your basic functions like delta dirac, step, exponential, also you should have been introduced to topics like convolution, DFT, FFT and the Z transform.

Once you have been introduced to the above, this book drills you with about 50 well worked out examples on all of them.

If you hate this book, it is (probably) because you are not ready for it yet. DSP is a simple concept that gets surprisingly complicated very fast. This book gets straight to the point and fills in the blanks and examples missing from the text books your forced to buy.

I am very pleased with this purchase.

Most of us know what digital signal processing is all about
but not what it does or how to use it intuitively. I think this
book puts everything together in a more organized fashion to
allow us to intuitively flair the end product even before we
get there. I think that's what studying is all about, create room
for intuition in a system, and that's what is expected from this
book as well.

This book is of little help in learning the topic as a stand alone book. The examples are of little use, and most of the problems have no solution listed. Even when answers are given, the supporting work is missing, leaving you wonder how they arrived at their answer. Don't waste your time, or money on this book.

This book is probably very effective as a suppliment to a class or more formal textbook, but I would not suggest it as a basis for learning DSP. The material strikes me as relatively comprehensive, with only a few errors in the derivations of the solutions to the problems (the answers are, of course, correct). Worst is that there are a few sections in which a string of irrelevant (and sometimes erroneous) derivation takes the place of a solid mathematical development.

I used this book in the DSP class in Georgia Tech. I think it is very useful and explains many complicated issues in plain theory. It uses a lot of examples which are difficult to find in the textbook, like the Oppenheim and Schafer, Discrete-Time Signal Processing.