YouTube Couldn't Exist Without Communications & Signal Processing: Crash Course Engineering #42

Engineering helped make this video possible. This week we’ll look at how it’s possible for you to watch this video with the fundamentals of signal processing. We’ll explore things from Morse Code, to problems like bandwidth capacity and noise, to how we arrived at the digital age.
Crash Course Engineering is produced in association with PBS Digital Studios: • All PBS Digital Studio...
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RESOURCES:
Sources:
www.ee.iitm.ac.in/~giri/pdfs/E...
edison.rutgers.edu/transmit.htm
www.history.com/topics/invent...
www.gaussianwaves.com/2008/04...
www.cs.man.ac.uk/~barry/mydocs...
www.madehow.com/Volume-5/Telep...
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[@saliexplore3094]

The moment when you realize school has taught you nothing ... Thanks CrashCourse

[@GAMEOVER-yy6zj]

You didn't pay enough attention, man.

[@deadmansvision5926]

@@GAMEOVER-yy6zj No.

[@subscribes6434]

I love DSP!! Im studying electrical engineering and would love to do dsp stuff but i think I may have to get a masters... I just want to work already lol

[@malekith6522]

I'm studying electrical engineering too and ohhh Newton signal processing is so math heavy so I for sure not gonna take this specialization ... I see Fourier sires in my nightmares.

[@ajj7794]

Go to Micheal Ben biazzen, Fourier series and Fourier transform, and Laplace transform playlists

[@manaskumarbehera262]

Math PTSD = signal processing interesting nonetheless

[@danielrhouck]

"I might be a little biased, but I think that's pretty darn cool" Okay, I'll try to adjust the DC offset to de-bias you.

[@DragoniteSpam]

If anyone likes thinking about the complexity that goes into all of these things, xkcd 676 "abstraction" is pretty great.

[@yourweebtv8733]

Your videos are super quality ! it's so helpful for the comprehension! big thanks

[@VertegrezNox]

I heard this.. The same day it was uploaded ❤

[@luckylex8106]

Great video! Learning can be fun with ten minute videos, so that I can learn but also have time for my actual homework lol

[@memojr4444]

No talk of fourier :( smh

[@amber1862]

Her average WPM wasn't a power of 2, so it was too inefficient to include Fourier in this episode.

[@GAMEOVER-yy6zj]

They missed out ASK, PSK, MSK, most of the dcom part - this video is incomplete

[@faithmccrary5692]

It’s just a “crash course”. They can’t talk about everything and everyone.

[@mikey10006]

Well she did say that waves are sum of other waves

[@kaustubhshankar27]

Brilliant! Thanks for the inspiration!

[@LtotheWtotheTD]

Helpful! Great video now I know how old TVs have static signal

[@shironegisama]

Can't wait for the marine engineerimg topic! My favorite degree!

[@lVlill432]

So interesting thank you!

[@mattKromer08]

I think this video picks a fine analogy for bandwidth and noise with the pipes and flowing water, but explains it poorly. Especially when the discussion of Shannon's limit comes in. It's a simple analogy: bandwidth is the size of your pipe but noise is how clogged that pipe is. A big pipe that's really clogged (high bandwidth, but high noise) may not transmit more water (data) than a small pipe that's squeaky clean (low bandwidth, low noise). I don't think that their analogy where it showed a large pipe making a clear picture but the small pipe making a noisy picture explained this well. I also think they could have made it clearer that Shannon's equation gives the limit of how much data you can send given a certain bandwidth and signal to noise ratio, but not a guarantee. It's signal processing researchers and engineers that create methods of communication that approach that limit for different applications. They don't seem to draw the right lines between signal processing and computer engineering, since once the internet enters your computer the signal processing part is basically over and it's hardware and computer engineering from then on out.

[@AND.Ortega]

After a long class the video explains better

[@msingh6208]

too good and very well explained.

[@Felenari]

Good watch. Thanks.

[@rkpetry]

*_...one of the most-bizarre effects of 'information theory' is that frequent not-using the band is, the data-bit information, e.g. if data results in signal modulation '00' or '11' then only half-the-bandwidth is being used for those instants, and that's statistically 50% of the time, and further '000' or '111' is even less-use, etc...._*

[@seetsamolapo5600]

- signals are represantion of the information we're sending - communication is sending and receiving of signals - An input transducer converts the sound and light into electrical signals from the camera and microphone

[@RangerRuby]

Wow! This video was recorded *before* Christmas!

[@RangerRuby]

@@FlamingBasketballClub Yeah! It was on the calendar at the beginning of the episode!

[@RangerRuby]

@@FlamingBasketballClub Yeah, it was an illustration!

[@kvnguvnxnejah-deendac-ric]

Can you start a category on Hermeticism

[@aginiid]

what do you think about Artificial Intelligence of Transportation?

[@powhatanpotts9076]

Studying about communication signals sound pretty interesting ☺☺.

[@JoeBetro]

Magic! 🌟

[@hatorizenzo8769]

If you ever wanted to learn DSP but the rigorous math in many other books turns you off, get this book : The Scientist and Engineer's Guide to Digital Signal Processing By Steven W. Smith, Ph.D. You can read it online for free (dspguide.com). I found DSP quite overwhelming too as a CS undergraduate, but the author did a great job explaining many concepts with just enough math I needed to implement into a program.

[@indianstudywithme8255]

I knew this one!

[@Partisane45]

It's even cooler when it transmits someone as nice as you :p

[@MilesQuickster]

The Computer SCIENCE!!

[@jthomps1965]

great video, well presented. Please put a deesser filter in your audio.

[@MilesQuickster]

I wonder how LCDs and...any technologically advanced system is actually manufactured to work with everything. Like how do they make liquid crystals interact with the rest of the phone or any device to give output

[@HeliosBeats]

Wherever voltage is applied or not applied to a part of an LCD display it it dictates If the pixel lights up (has to do with polarization of light)

[@rkpetry]

*_...old-fashion analogies...example how would you put several FM signals in the same band and discriminate them by tracking each signal amplitude and slope vs too-much-slope and too-much-amplitude, vs the bandwidth of the information itself..._*

[@rizdalegend]

All this happens at the speed of light and millions/billions times a second, which is mind boggling

[@mariusluft16]

Only 2/3 of speed of light I beliefe as our medium isn't vacuum

[@DjSapsan]

6:18 signal to noise *radio* ?? I guess there should be *ratio*

[@AaronQuitta]

At 6:17 it says "signal to sound radio" instead of "ratio".

[@TheJulioToboso]

Shannon's BITs don't stand for Binary Digit! It Stands for Binary Information Unit! Related, but conceptually different: Representing a number, or representing an information physical quantity.

[@Felixkeeg]

6:18 You meant to write "Signal to noise raTio" I believe

[@Felixkeeg]

Enter Fourier-Transform

[@MilesQuickster]

4:49 *cough* Chiptunes

[@cagethemouse]

1:31, WAZZZZUP???? xD

[@unleashingpotential-psycho9433]

Nice 🔥🔥🔥🔥🔥

[@Preda.Y]

Ok but when talking about a signal transmitted by a wire... where does noise come from then?

[@ashtenalexander5271]

Breaks in the wire, and bad connections at the end. Also if an amplifier on a line goes bad it can distort the clean incoming signal.

[@anthonymorford8804]

I hope software engineering is next

[@Deuphus]

For the love of all things Sheldon, FIX THAT SHELF!!!

[@goaaand3565]

Why today.... it could be figured out with you guys very long long ago

[@elliptix9344]

what happened to John Green :(

[@kujmous]

Frequency-division Multiplexing = 88 Morse Code operators with 1 Piano, each with one key.

[@nikitatokmakov1992]

hahahhahahaa.... because its splices light based on frequency. nice joke

[@DaveAlexKD]

At first i thought "What the hell is transjesus?" then i turn captions on and i learned she was trying to say transducers.

[@s3cr3tpassword]

S/N -> signal to noise radio. Haha, not sure if good pun or sincere accident by animator.

[@romainlaugier5915]

Yes I noticed this one too. The funny thing is I have made this typo in the past too!!

[@Comrade2261]

Is it bad that, near the beginning of the video, when she was saying "the ability to" my mind immediately filled in "destroy a planet is insignificant next to the power of the force"?

[@MrDanamiel]

is it just me or the sound in this video keep changing from clear to deep to clear?

[@MOARMOARMAN]

Neither would the best thing in the world EXIST The youtube comment section.

[@MilesQuickster]

Meh. Debatable (on whether it's the best thing in the world)

[@SurajGrewal]

10 bucks of telegraph message, just to send 'wazzzup"

[@aliqazilbash5231]

the world must be mine. 🅰️ngineer

[@Chamelionroses]

If people dislike this why do they even ude the internet? Lol

[@Akshay-cj3hq]

dat aussie accent tho

[@kevinreardon2558]

Now mention of who the presenter is, but she could easily be a Disney Princess.

[@Subscriberswithtwovideos-gr6tk]

When the title is a paragraph

[@PatrickAllenNL]

Dits and dahs

[@timgheys]

Please stop cutting out the pauses between (some) sentenses. It is really really really annoying to watch. Thanks.

[@user-mw8lv3hx3j]

So I didn’t learn something new( that’s all was in the 7 form... but i am from Russia. I know absolutely nothing about American schools. Is it a channel for kids or you are going to tell something more difficult in the future? Excuse me for my bad knowledge of English

[@tumult04]

This video confirms this is all witchcraft 😂

[@navaneeth95]

She is fine

[@EmmehKawaiii]

Aye

[@hosseinebrahimi3451]

She's so hot, she messed my brain's SNR Margin i couldn't understand a word of she was saying.

[@israeltorresmadrigal2339]

NEEEERRRDDDDD

[@franktwocheese7058]

First

[@pyrotheevilplatypus]

I keep hearing her say "transjesus"

[@micahhenley589]

DNA contains information. Information only comes from an intelligent mind. Thus an intelligent mind, far beyond that of humans, created DNA.

[@HugoFauzi]

Why does information only comes from an intelligent mind ?

[@fionafiona1146]

Informationen is what we can decode, it needs to represent something like tv/radio but can be created without intent (tree rings, sediment layers, DNA, blood splatter on crime scenes).

[@micahhenley589]

@@HugoFauzi Hello. Thanks for your question. Whenever we find information we always trace it back to an intelligent source. Random chaos has never been shown to produce Information. Random chaos doesn't even produce order. For instance, could the 4 faces on mount Rushmore have carved themselves? Of course not. It took intelligent minds to map and carve the 4 faces. DNA(deoxyribonucleic acid) contains the digital information to build and operate a living organism. When this information is corrupted, by mutations, lots of diseases and disorders happen.

[@chasbodaniels1744]

@fiona fiona Yep, you’ve nailed it. Nice examples.

[@marcopeery9747]

I like the original guys. This girl is no fun so it is hard to learn!!!

[@fwily2580]

Waste of the time. Should be called, “ History of Communications”

[@donnie1508]

First