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

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  • Опубліковано 23 гру 2024

КОМЕНТАРІ • 94

  • @saliexplore3094
    @saliexplore3094 5 років тому +63

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

  • @danielrhouck
    @danielrhouck 5 років тому +43

    "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.

  • @subscribes6434
    @subscribes6434 5 років тому +56

    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
      @malekith6522 5 років тому +3

      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
      @ajj7794 5 років тому +1

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

    • @manaskumarbehera262
      @manaskumarbehera262 5 років тому

      Math PTSD = signal processing interesting nonetheless

  • @DragoniteSpam
    @DragoniteSpam 5 років тому +15

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

  • @memojr4444
    @memojr4444 5 років тому +111

    No talk of fourier :( smh

    • @amber1862
      @amber1862 5 років тому +12

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

    • @GAMEOVER-yy6zj
      @GAMEOVER-yy6zj 5 років тому +3

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

    • @faithmccrary5692
      @faithmccrary5692 5 років тому +29

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

    • @mikey10006
      @mikey10006 5 років тому +14

      Well she did say that waves are sum of other waves

  • @mattKromer08
    @mattKromer08 5 років тому +9

    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.

  • @seetsamolapo5600
    @seetsamolapo5600 Рік тому

    - 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

  • @yourweebtv8733
    @yourweebtv8733 4 роки тому +4

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

  • @VertegrezNox
    @VertegrezNox 5 років тому +11

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

  • @RangerRuby
    @RangerRuby 5 років тому +4

    Wow! This video was recorded *before* Christmas!

    • @RangerRuby
      @RangerRuby 5 років тому

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

    • @RangerRuby
      @RangerRuby 5 років тому +1

      @@FlamingBasketballClub Yeah, it was an illustration!

  • @rkpetry
    @rkpetry 5 років тому +2

    *_...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...._*

  • @hatorizenzo8769
    @hatorizenzo8769 5 років тому +2

    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.

  • @AND.Ortega
    @AND.Ortega 5 років тому +2

    After a long class the video explains better

  • @tumult04
    @tumult04 Рік тому +2

    This video confirms this is all witchcraft 😂

  • @kvnguvnxnejah-deendac-ric
    @kvnguvnxnejah-deendac-ric 5 років тому +2

    Can you start a category on Hermeticism

  • @kaustubhshankar27
    @kaustubhshankar27 5 років тому +2

    Brilliant! Thanks for the inspiration!

  • @Sleepybug21
    @Sleepybug21 5 років тому +3

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

  • @shironegisama
    @shironegisama 5 років тому +1

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

  • @msingh6208
    @msingh6208 5 років тому +1

    too good and very well explained.

  • @DjSapsan
    @DjSapsan 5 років тому

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

  • @lVlill432
    @lVlill432 5 років тому +3

    So interesting thank you!

  • @LtotheWtotheTD
    @LtotheWtotheTD 5 років тому +1

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

  • @AaronQuitta
    @AaronQuitta 5 років тому

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

  • @rkpetry
    @rkpetry 5 років тому +2

    *_...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..._*

  • @aginiid
    @aginiid 5 років тому

    what do you think about Artificial Intelligence of Transportation?

  • @MilesQuickster
    @MilesQuickster 5 років тому +1

    The Computer SCIENCE!!

  • @rizdalegend
    @rizdalegend 5 років тому

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

    • @mariusluft16
      @mariusluft16 5 років тому

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

  • @PointySword
    @PointySword 5 років тому

    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.

  • @Felenari
    @Felenari 5 років тому

    Good watch. Thanks.

  • @Felixkeeg
    @Felixkeeg 5 років тому +2

    Enter Fourier-Transform

  • @MilesQuickster
    @MilesQuickster 5 років тому

    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
      @HeliosBeats 5 років тому +1

      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)

  • @DaveAlexKD
    @DaveAlexKD 5 років тому +1

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

  • @jthomps1965
    @jthomps1965 5 років тому

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

  • @Preda.Y
    @Preda.Y 5 років тому

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

    • @ashtenalexander5271
      @ashtenalexander5271 5 років тому

      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.

  • @indianstudywithme8255
    @indianstudywithme8255 5 років тому +1

    I knew this one!

  • @powhatanpotts9076
    @powhatanpotts9076 5 років тому +9

    Studying about communication signals sound pretty interesting ☺☺.

  • @Partisane45
    @Partisane45 5 років тому

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

  • @JoeBetro
    @JoeBetro 5 років тому +2

    Magic! 🌟

  • @cagethemouse
    @cagethemouse 5 років тому +1

    1:31, WAZZZZUP???? xD

  • @Felixkeeg
    @Felixkeeg 5 років тому

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

  • @MilesQuickster
    @MilesQuickster 5 років тому

    4:49 *cough* Chiptunes

  • @MOARMOARMAN
    @MOARMOARMAN 5 років тому +1

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

    • @MilesQuickster
      @MilesQuickster 5 років тому +1

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

  • @anthonymorford8804
    @anthonymorford8804 5 років тому

    I hope software engineering is next

  • @Comrade2261
    @Comrade2261 5 років тому +1

    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"?

  • @SurajGrewal
    @SurajGrewal 5 років тому +2

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

  • @elliptix9344
    @elliptix9344 5 років тому

    what happened to John Green :(

  • @goaaand3565
    @goaaand3565 5 років тому

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

  • @kujmous
    @kujmous 5 років тому

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

    • @nikitatokmakov1992
      @nikitatokmakov1992 5 років тому

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

  • @aliqazilbash5231
    @aliqazilbash5231 4 роки тому

    the world must be mine.
    🅰️ngineer

  • @Chamelionroses
    @Chamelionroses 5 років тому +3

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

  • @kevinreardon2558
    @kevinreardon2558 5 років тому +4

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

  • @unleashingpotential-psycho9433
    @unleashingpotential-psycho9433 5 років тому +2

    Nice 🔥🔥🔥🔥🔥

  • @MrDanamiel
    @MrDanamiel 5 років тому

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

  • @s3cr3tpassword
    @s3cr3tpassword 5 років тому

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

    • @romainlaugier5915
      @romainlaugier5915 5 років тому

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

  • @Akshay-cj3hq
    @Akshay-cj3hq 5 років тому

    dat aussie accent tho

  • @Deuphus
    @Deuphus 5 років тому

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

  • @timgheys
    @timgheys 5 років тому

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

  • @Subscriberswithtwovideos-gr6tk
    @Subscriberswithtwovideos-gr6tk 5 років тому +2

    When the title is a paragraph

  • @Сашаникулин-ы7ф
    @Сашаникулин-ы7ф 5 років тому

    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

  • @PatrickAllenNL
    @PatrickAllenNL 5 років тому

    Dits and dahs

  • @navaneeth95
    @navaneeth95 5 років тому

    She is fine

  • @fwily2580
    @fwily2580 5 років тому +1

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

  • @hosseinebrahimi3451
    @hosseinebrahimi3451 5 років тому

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

  • @pyrotheevilplatypus
    @pyrotheevilplatypus 5 років тому

    I keep hearing her say "transjesus"

  • @israeltorresmadrigal2339
    @israeltorresmadrigal2339 5 років тому

    NEEEERRRDDDDD

  • @EmmehKawaiii
    @EmmehKawaiii 5 років тому

    Aye

  • @marcopeery9747
    @marcopeery9747 5 років тому

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

  • @donnie1508
    @donnie1508 5 років тому

    First

  • @micahhenley589
    @micahhenley589 5 років тому

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

    • @HugoFauzi
      @HugoFauzi 5 років тому +1

      Why does information only comes from an intelligent mind ?

    • @fionafiona1146
      @fionafiona1146 5 років тому +1

      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
      @micahhenley589 5 років тому

      @@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
      @chasbodaniels1744 5 років тому

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

  • @franktwocheese7058
    @franktwocheese7058 5 років тому

    First