On 2023-04-01, Richard Dobson wrote:
"Introductory Digital Signal Processing With Computer Applications",
Paul Lynn and Wolfgang Fuerst. [...]
I've never really coded myself, so no programming books. I've been on
the side of the math. There, Oppenheim and Schafer's work, under the
name "Digital Signal Processing", and "Discrete Time Signal Processing"
caught my attention.
The best thing here was Oppenheim's doctoral work, turned into a
monograph, and then a collaborative work with Schafer. It's just the
best thing ever, because it led me into the Fourier quadrangle of 1)
discreteness in time and 2) discreteness in frequency, from which come
a) Fourier series, b) Fourier transform, c) Discrete time Fourier
Transform, and d) Discrete Fourier Transform, of which all of the audio
and visual compression algorigthms flow, as in Modified or Lapped.
Oh, and one of the best works there, not even now fully utilized, was
the idea of "homomorphic signal processing". That one took a logarithm,
as a homomorphism from the multiplicative domain to the additive, so
that multiplicative problems could be solve additively. Like, you could
suddenly take away general lighting by its spatial low frequency
demenanor, from the high frequency lighting conditions of a picture.
This sort of theory has *never* been applied on this list, even if it
could be.
The first edition (which I have) provided programs in Basic and
Pascal.
I like Pascal too. It's been my basic language.
Of course Turbo Pascal, with its later object orientation. I actually in
my early teens, over DOS-based Turbo Pascal, built up a basic windowing
system. Trouble was, 1) I didn't know how to do anything but bitbashing
and polling to the mouse, and 2) I didn't know how to optimally
intersect windows for caret or pointer.
BTW neither did Microsoft in their early version of Windows, which is
why the first versions lag aas much as they do.
You will likely want the Second Edition where these are in C. As I
don't have that, I can't say whether or not they include code to draw
figures as used in the book (FFT plots, impulse responses etc).
Perchance so, but personally I'd advocate for fundamental knowledge.
It's highly useful productive to know your libraries, and far beyond
what I know. However, knowing what *I* do, I'd argue, lets you learn
this stuff and its libraries faster.
But - as far as I know this won't help you build .wav files. The
unofficial "industry standard" for that is 'libsndfile' (GPL, should
build fine under MinGW-64).
So it is. From Eric de Castro Lopo. He's also made it a point of making
his library easy to use, and for it to separate concerns. Nice work, say
I as well!
--
Sampo Syreeni, aka decoy - [email protected], https://urldefense.proofpoint.com/v2/url?u=http-3A__decoy.iki.fi_front&d=DwIBAg&c=009klHSCxuh5AI1vNQzSO0KGjl4nbi2Q0M1QLJX9BeE&r=TRvFbpof3kTa2q5hdjI2hccynPix7hNL2n0I6DmlDy0&m=alLQepd2QkizsAtFdXXCjnkN8Lk7bOv8rg_kPY_Oq3h1s-Yf8Rg_rzgxMTM08cm2&s=jcGCsUXeNrSs_JKnvRKCJIMa4-qFo7CIJ1Qd6yu54iw&e=
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