2. Discrete-Time (DT) Systems
Вставка
- Опубліковано 24 лис 2024
- MIT 6.003 Signals and Systems, Fall 2011
View the complete course: ocw.mit.edu/6-0...
Instructor: Dennis Freeman
License: Creative Commons BY-NC-SA
More information at ocw.mit.edu/terms
More courses at ocw.mit.edu
Starts at 8:05
what do you mean?
he means the administrative stuff regarding homework and such stops before the time mentioned and the actual content on signals and systems starts.
Does anyone here speak Spanish?
Hello, there
Porque?
to know when your audience needs a break and have a method to engage them is an extremely valuable ability
the way the instructor makes the explanation is very clear, really great university, glad to have studied english to enjoy these courses that simply can't find in español.
I have to watch these because my teacher makes it very unclear! And theses videos are very clear !
One of the sweetest instructors ever!
Dear Dennis Freeman, Regards from BRAZIL and thank you so much for make us thinking in different way about DT Signal Processing.
De que universidade tu é?
This lecture is more a philosophy course that teaches us how to think! I have gained much more instinct understanding than that of Oppenheim.
yeah i agree!
I felt the same way, this a refresher course after a long time. I am totally enjoying it.
This reminds me a lot of a Theory of Computation class I took. Particularly similar to converting deterministic finite automata into regular expressions
Watching from the Philippines. Thank you sir Dennis Freeman. This is a great lecture (declarative). Please accept my sincere gratitude (imperative).
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thankyou MIT open course ware. :)
Amazing videos. It feels as if I am sitting in the class.
You can write on board like MIT math, physics, CS lectures. And you will see that your students are more active
Or it can be that you are just lazy. And you dont want yo give any effort like otger professors
Most of the proffesors around the world does this to give no effort
17:00 this block diagram is so confusing...
It would be much easier to use a negative feedback with unit gain
I think what professor wanted to say was linear system can be represented by Ax=b
Excellent university = High quality education = MIT
mighty mighty MIT
11:50 (4) means [first deivative of y] = [second derivative of x] :)
lecture starts at 8:05
:)
I wish your videos had more pixels...
30:30 I don't understand what he says about the system at rest. The R operator is time invariant. It seems thatt that is all that is needed for the isomorphism.
That's strange that he says discrete-time is easier than continuous time, because my university (Alabama-Huntsville) breaks it up into two courses, with the continuous time class serving as a prerequisite for the discrete-time course.
That's strange, at UF they do the opposite, DT is a prerequisite for CT
What does kachunk mean?
What is ‘Imperative ‘ in this context? Any help would be appreciated.
by imperative he means that all the information is present in block diagram.....
when you make something precise it may lose some information like difference equation does.
Imperative means like a command, while declarative means you are just showing something. It is imperative because the block diagrams tells you what to do with the signal, whereas the difference equation is just an equation.
Well i needed 10 minutes to figure out what they had to in 15 seconds :)
Thats why they are in MIT and you are not.
The Evil Tyrant wat a jerk
Somewhere around 38:39 (Accumulator) , how is y(negative integer)=0 and y(non-negative integer)=1?
I complied with this for a while and then spotted a plot twist. It is that if I have
y(n)=x(n)+y(n-1)
then, y(n)=x(n) + x(n-1) + ... x(k+1) + y(k) where k is some integer smaller than n.
Now, It is true that if n !=0 then, x(n)=0.
So, y(0)=x(0) + y(k) where k
SaiKrishna KVMB I’m not sure if I get your question correctly, but if you mean ‘why y(-1)=0’, it is because the system starts at rest, so when n
@@behrouzbeheshti Thanks for taking the initiative to reply :) I appreciate replies to my questions.
Alright, yes, you've got my question perfectly.
That was a couple of months ago.
Now, I'm under the impression that it's a basic characteristic of a causal system - the values of output being zero whenever the n instants are negative.
An accumulator should accumulate the effects due to causes that cause the effects so the accumulator is a causal system, hence the zero output for -ve n instant values; Because off causality.
Also, initial rest, that's a good way to put it...
@@bios546 No worries! I'm not sn expert in the field though :) I'm just learning.
Thank you so much this is Gold
Around 28:40 he says that the operators are following rules of polynomials, then he mentions isomorphism. Are we saying that linear operators / transformations are isomorphic to polynomial operations?
No for instance x^2 in P3 is isomorphic to R3 but is not a linear operator
The professor is soo funny!!! XD I like it!! (Y)
Thanks!
He does have flexible fingers. :D
video lectures from alan Oppenheim from 70's are better
Honestly, could have made this at least 720 HD resolution, if not 1080 Full HD. MIT, given its massive global reputation, should have higher standards.
quality of video is not good
seriously? are you THAT spoiled???
mortse 90 yes
Although video quality is bad, but content is gold