Pioneer LaserDisc - How It Works with Don "Mr. Wizard" Herbert
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- Опубліковано 2 кві 2011
- Check out the Mr. Wizard Studios UA-cam page for more great Mr. Wizard shows!
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This is the complete video of the "LaserDisc - How It Works" product demonstration featuring Don "Mr. Wizard" Herbert.
Technical aspects:
The video has been taken from the original LaserDisc, played on a Pioneer LD-660 LaserDisc Player. Video output was CVBS (composite). This video was captured using a Dell video capture device on a Dell Dimension 4600 running Windows XP. MediaPortal was the software used to perform the video capture. A conversion utility was employed to remux the DVR-MS file into a proper MPEG2 file. The MPEG2 file is then transferred to my MacBook Pro where, with the Apple QuickTime MPEG2 playback component and MPEG Streamclip, the MPEG2 file is deinterlaced, scaled from 720x480 to 640x480, and transcoded into an MEPG4 H.264 file.
This video made with Windows/made on a Mac. - Наука та технологія
Why doesn't this type of high quality educational video have a few million views?
What a great guy. Glad I knew him just before he passed. What an educator.
Entertainer
Its amazing how using physical object instead of computer graphics makes things easier to understand .
i dont fully agree, but thats partially true.
I feel like touching objects and rotating them around in your hand gives much clearer idea than viewing 2d images and 3D objects on the screen
that is true, i myself am also oldschool when it comes to physical models and stuff, but i gotta agree that digital medium has lots of potential that physical cant achieve, for example, it's easier to understand how an F1 engine works with a good 3d animation. Of course, if you're studying mechanics you should always have contact with the physical objects, but digital is an essential complement nowadays.
I guess one complements the other
+maak You watched this video on a 2d screen.
"Here's some chocolate ice-cream...yeah, it's chocolate alright"
This is the demo that came with the early Pioneer Laser Disc players. What he doesn't tell you is you had to get up every 30 minutes to flip the disc over like a vinyl record. Lol.
Only with CAV most LDs are CLV with 60 minutes runtime per side.
I think it's amazing that we needed better lasers to come out to make this tech hit it's mark.
I'm sold! When and where will these amazing devices be on sale?
I wonder if my science teacher would ever show this video in her class, it's so detailed on how a laser beam works. :P
Because I always smear my ice cream on my laser discs
9:42 watch the UA-cam compression buffer algorithm kick in as a uniform field - thank you Mr. Wizard 🙏🏻
And all of that "LaserVision" or later called "LaserDisc" was invented by Philips N.V. of the Netherlands in the late 70s.
They developed, based on this technology, the smaller CompactDisc in 1982, together with Sony.
Great video, great explanation.
Thanks for sharing it.
Gran video, gran explicacion.
Gracias por compartirlo.
MR. WIZARD RULES!
These same priciples can be said for DVD and Blu-Ray too!
"HI, I'm Mr. Wizard. Here's how the Pioneer Laserdisc works. I needed money, so I agreed to make this video."
Yes, you`re right. I only said "in some kind of "digital"", as it`s only a question of modulation wether the stored information is analog or digital.
I never knew LASER was an acronym
Its only a question of coding. The physics behind are basically the same and, starting from LD, the CD, DVD and BluRay are only evolutional steps of higher information density.
The analog signal on LD is indeed coded in some kind of "digital" form on the disc, the "pits" are representing the frequency of the signal by marking the zeropoint of the waveform. You could also code analog signals on BluRay this way!
Way to touch the disc wizard!
I used to have and LD player; they were noisy and half-way through the movie, I had to get up and flip the disc over. I didn't have the fancy type that would autoplay both sides.
Its 2020 and I got mine
He needs another Timmy!
And you could say that this is Dinosaur technology...
To the the funny thing about Laser disk is that i hit it's mark wean better lasers allowed us to make it smaller and hold more information; their for DVD and Blu-ray.
That's my wizzard
Where's the other side?!
@mig189189189 cool thing is that DVD's and CD's work the same way. Blue Ray too just that the laser is blue.
They are digital. LaserDiscs are analogue
is it true that 1 laser wavelength (whatever that means) can carry ALL the phone calls and TV programs ?
Yes, it is. We don't have have the equipment that could handle say the entirety of the worlds internet traffic in say real time or transmit it that quantity at that speed but yes in a single fiber optic wire you could transmit an almost infinite amount of data in an infitesimal amount of time. Granted no we cant do that but it could be possible.
thanks, I am still skeptical though
@@MatthewHolevinski You didn't answer the question. The question was can 1 wavelength carry it. Your answer was that one fiber optic wire could carry it.
@@frankcabanski9409 the answer conversationally speaking is no.
@@MatthewHolevinski Thanks.
What year was this filmed?
1980.
@@Watcher3223 ty
@@steelstreet79You're welcome.
Permanently? #LaserRot
These were far more expensice than videodiscs and did not survive as you could scratch the surface thus rendering the disc.useless. Also, notice that laserdiscs had no identification on the disc so you had to ensure you kept them in the package. DVDs improved on this because you only play one side and can fit far more data on them.
_"These were far more expensice than videodiscs and did not survive as you could scratch the surface thus rendering the disc.useless."_
LaserDiscs are videodiscs.
Of course, there were at least two stylus-based systems as well: CED and VHD.
And LaserDiscs can play through scratches fairly well. It's only when it's severe enough to act as sufficient obstruction to the optics to disrupt focus and/or tracking.
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_"DVDs improved on this because you only play one side"_
There are dual-sided DVDs, such as early releases where one side has the movie in fullscreen and the other side has the same in widescreen.
Dual sided DVDs are not as common today, however. Most titles now are usually released either on single-sided RSDL DVDs or single-sided single layer DVDs.
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_"...can fit far more data on them."_
Well, yes and no.
In theory, a LaserDisc has the _potential_ to store far more data than a DVD because of greater physical area where the track is written to. And this ability increases when you use a shorter wavelength/higher frequency beam. But, to do that, you would be creating an entirely new format since this digital 12 inch disc will not be complaint with the LaserVision standard and would be incompatible with existing LaserDisc players.
In practice, DVD can hold more digital data than a LaserVision formatted disc, and that's because LaserVision is an analog format. That means any digital data that is stored on the disc must be done by containing its signal within an analog subcarrier or within the video signal itself. That's not nearly as efficient as the more direct method of using EFMPlus encoding to record the digital data to a DVD.
Thumbs up if SNL brought you here
this is fucking magic?????