WEBVTT - DVD vs. Blu-ray 0:00:00.320 --> 0:00:02.880 Brought to you by the reinvented two thousand twelve camera. 0:00:03.200 --> 0:00:08.920 It's ready. Are you get in touch with technology with 0:00:09.080 --> 0:00:17.920 tech Stuff from how stuff works dot com. Hello there, everybody, 0:00:17.920 --> 0:00:20.279 and welcome to tech stuff. My name is Chris Poulette, 0:00:20.280 --> 0:00:22.360 and I am the tech editor here at how stuff 0:00:22.360 --> 0:00:25.800 works dot com, sending across from me as usual as 0:00:25.880 --> 0:00:31.200 senior writer Jonathan Strickland. We're living in a material world. 0:00:32.040 --> 0:00:35.120 You know, I'm not going there. It's because our our 0:00:35.159 --> 0:00:39.840 guest producer, Liz called me a prima madonna, just because 0:00:39.840 --> 0:00:41.560 I said that I can't work like this and I 0:00:41.640 --> 0:00:44.199 would be in my trailer. By the way, my trailer 0:00:44.520 --> 0:00:49.000 is underneath my cubicle. That explains the trash. Yeah, it does, 0:00:49.360 --> 0:00:51.599 lots of trailer trash. You know what, Before we get 0:00:51.640 --> 0:00:53.760 into a total rat hole here, I think we could 0:00:53.760 --> 0:00:57.279 talk a little bit about some pumpkins. Pumpkins, Yes, all right, 0:00:57.520 --> 0:00:59.640 what do you like to when you look at a pumpkin? 0:01:00.120 --> 0:01:03.120 What do you think? I'm thinking I prefer it that 0:01:03.200 --> 0:01:06.560 way and not as a pie. Really, I think I 0:01:06.600 --> 0:01:09.640 would love to see that move at a high velocity 0:01:09.680 --> 0:01:12.720 and splat into the ground as hard as possible, preferably 0:01:13.200 --> 0:01:16.720 as far away from its origin possible. In fact, I 0:01:16.760 --> 0:01:20.680 spend hours thinking of ways to propel a pumpkin through 0:01:20.720 --> 0:01:25.320 mechanical means, through the air, onto the ground and splat 0:01:25.319 --> 0:01:27.760 into a thousand pieces. Alright, then, so what is the 0:01:27.800 --> 0:01:30.360 best way to achieve that? Well, it turns out the 0:01:30.400 --> 0:01:32.560 best way to achieve it is to watch people who 0:01:32.640 --> 0:01:34.880 already know what they're doing. And you can do just 0:01:35.120 --> 0:01:38.520 that because the Science Channel has two television shows, the 0:01:38.600 --> 0:01:41.639 Road to Punkin Chunkin and punkin Chunking, that are airing 0:01:42.360 --> 0:01:48.640 on Thanksgiving Day, which would be November at eight p 0:01:48.840 --> 0:01:50.760 m on the Science Channel. Yes, eight p m is 0:01:50.800 --> 0:01:53.440 the Road to Punkin Chunkin. Nine pm is punkin Chunkin. 0:01:53.920 --> 0:01:56.800 You two can watch as pumpkins do what they were 0:01:56.840 --> 0:01:59.360 born to do, fly through the air and smash into 0:01:59.400 --> 0:02:02.760 the ground. Ah. Yes, and hopefully noone will make pie 0:02:02.760 --> 0:02:06.440 out of them afterwards, I would hope, not sowing the 0:02:06.480 --> 0:02:10.280 seeds of destruction. You might say, yes. Indeed, I wouldn't 0:02:10.320 --> 0:02:13.480 say that, but you might I would. All right, Well, 0:02:13.560 --> 0:02:17.240 let's move on. Today's topic actually comes to us courtesy 0:02:17.320 --> 0:02:23.960 of a little listener mail. This listener mail comes from 0:02:24.000 --> 0:02:29.680 Brian in Vegas, Viva Las Vegas, Brian, He writes, Hey, guys, 0:02:29.840 --> 0:02:32.240 love the podcast. Got a question for you, guys, what 0:02:32.560 --> 0:02:35.959 is the difference between Blu ray and DVD? I own 0:02:36.080 --> 0:02:38.440 both but can't tell the difference by looking at them. 0:02:38.600 --> 0:02:42.040 Is that the way they encode the disks? Brian and Vegas. Well, Brian, 0:02:42.040 --> 0:02:43.600 we're going to talk a bit about DVDs and a 0:02:43.600 --> 0:02:46.400 little bit about Blu ray and what the differences and uh, 0:02:46.480 --> 0:02:49.600 and you know why there's two different sets of all 0:02:49.639 --> 0:02:51.840 the movies that you want to see in your local 0:02:51.840 --> 0:02:55.720 movie store. And if we're lucky, we can manage to 0:02:55.760 --> 0:02:59.919 get through the entire thing without quoting an Austin Powers movie, 0:03:01.080 --> 0:03:05.680 because it all comes down to one simple thing. Freaking lasers. 0:03:09.040 --> 0:03:10.760 Just get it all the way. Look, I got the 0:03:10.800 --> 0:03:15.079 hairstyle for Dr Evil, so I'm just gonna go with it. Yeah, lasers, 0:03:15.200 --> 0:03:18.880 Yeah exactly. So first of all, before we before we 0:03:18.960 --> 0:03:21.520 really dig into it, let's talk a bit about digitally 0:03:21.639 --> 0:03:27.320 encoding information onto a disc format. This applies to compact discs, DVDs, 0:03:27.360 --> 0:03:33.880 blue rays, and even the limited HD DVD, also DVD audio, yeah, 0:03:34.040 --> 0:03:36.200 other other formats as well, but really, any kind of 0:03:36.200 --> 0:03:42.080 digital encoding upon a disc um So it's sort of 0:03:42.160 --> 0:03:45.840 similar in a way to the analog way of encoding 0:03:45.960 --> 0:03:51.360 sound on a vinyl disc, only in the sense that 0:03:51.800 --> 0:03:55.240 you have to spend the disk and and a reading 0:03:55.280 --> 0:03:59.280 mechanism goes across the disc and picks up information. Now 0:03:59.320 --> 0:04:02.680 in the case, yeah, I wouldn't say that's completely that 0:04:02.840 --> 0:04:05.800 that's the only way. Well, maybe not, but we're talking 0:04:05.840 --> 0:04:07.800 the difference between digital and analog. There's a lot of 0:04:08.040 --> 0:04:10.840 There are a lot of differences. Well actually yeah, I 0:04:10.840 --> 0:04:13.240 mean the main one being nothing actually touches the disk, 0:04:13.520 --> 0:04:18.520 and in in the newer polycarbonate discs. But in both 0:04:18.560 --> 0:04:21.160 cases it is the surface of the disk which is 0:04:21.680 --> 0:04:25.240 uh has has has a texture. It doesn't look like 0:04:25.400 --> 0:04:28.080 a DVD has texture, but it does, right, So the 0:04:28.320 --> 0:04:32.159 DVD has these tiny little bumps. It's there. Usually you 0:04:32.200 --> 0:04:35.480 hear about DVD pits. The pit is on one side 0:04:35.480 --> 0:04:38.039 of the DVD, but the side that is actually read 0:04:38.080 --> 0:04:41.960 by the freaking laser beam that side. It's more of 0:04:42.000 --> 0:04:45.680 a bump. And these bumps are tiny, and I'm talking 0:04:45.720 --> 0:04:49.480 tinier than microscopic. We're talking on the nanoscale tiny, which 0:04:49.560 --> 0:04:51.840 is why they appear flat to us. Yeah, of course 0:04:51.839 --> 0:04:53.200 you can. You can try to smash them out with 0:04:53.200 --> 0:04:56.200 a hammer, but I wouldn't recommend it because that will 0:04:56.240 --> 0:05:00.640 break your dvdsy So, um, we're talking that, like I said, 0:05:00.640 --> 0:05:07.279 in the nanometers range. Uh, the I'll tell you right. So, 0:05:07.279 --> 0:05:13.640 so a typical bump on a DVD would be about um, 0:05:13.920 --> 0:05:19.479 three and twenty nanometers in width, like like wide, which 0:05:19.520 --> 0:05:24.440 is pretty narrows long, which is also not that long. 0:05:25.160 --> 0:05:28.320 These are tiny, tiny little bumps, and uh, a red 0:05:28.600 --> 0:05:33.520 laser reads these bumps. Yeah. The DVD players and and 0:05:33.600 --> 0:05:39.160 c D audio players use red lasers to read the disks. Yeah, 0:05:39.279 --> 0:05:45.000 So here's here's what's happening. A laser gets the the 0:05:45.080 --> 0:05:47.920 DVD player or CD players shoots the laser that gets 0:05:47.960 --> 0:05:51.400 reflected by these different little bumps and by the smooth 0:05:51.440 --> 0:05:54.520 spaces between the bumps, and the difference in that is 0:05:54.560 --> 0:05:58.680 what is interpreted by the machine as bits and bites, 0:05:58.920 --> 0:06:01.800 and that in turn is what ends up being converted 0:06:01.839 --> 0:06:04.240 into the video and audio that you experience when you 0:06:04.279 --> 0:06:08.440 PLoP a DVD or Blu Ray into a DVD or 0:06:08.480 --> 0:06:11.480 Blue Ray player and you turn your TV. The difference 0:06:11.680 --> 0:06:15.680 is a matter of size, right, because a Blu ray 0:06:15.720 --> 0:06:20.080 player can read bumps that are much much smaller than 0:06:20.320 --> 0:06:23.560 a DVD player. And why is that? It's because of 0:06:23.760 --> 0:06:27.880 freaking lasers. Yes, the blue ray actually got its name 0:06:27.960 --> 0:06:30.800 from the fact that it uses a blue laser. Yes, 0:06:30.839 --> 0:06:34.200 that's the blue ray right right. And uh, it has 0:06:34.240 --> 0:06:38.440 a shorter wavelength of light wavelength. So that's that's the 0:06:38.480 --> 0:06:40.960 whole thing. Because it has a shorter wavelength, it can 0:06:41.000 --> 0:06:46.520 read information in a smaller track. Right. So, um, we're 0:06:46.520 --> 0:06:49.000 talking about like like when you think of the spectrum 0:06:49.040 --> 0:06:52.080 of colors, that's what we're talking about, the wavelength. So 0:06:52.560 --> 0:06:56.200 roy g Biv. Although I think they took out the eye, 0:06:56.440 --> 0:06:59.239 didn't they. I don't think there's no longer an indigo. 0:06:59.400 --> 0:07:01.360 I think it goes is blue to violet now because 0:07:01.400 --> 0:07:04.000 there was a discussion about how indigo and violet are 0:07:04.080 --> 0:07:07.200 too close to one another to be considered separate. I 0:07:07.760 --> 0:07:10.800 might did the school that I am familiar with they 0:07:10.800 --> 0:07:14.840 are still teaching. Yeah, but we're in Georgia. So Roy 0:07:14.920 --> 0:07:19.600 g Biv. The the color what a what a dirty look? 0:07:19.640 --> 0:07:23.160 I got the Uh? I went to school in Georgia too. 0:07:23.440 --> 0:07:27.520 But the colors go from the longer wavelengths to the 0:07:27.520 --> 0:07:31.440 shorter wavelengths, So a red laser has a longer wavelength 0:07:31.640 --> 0:07:35.080 um than a blue laser. Uh. So the red lasers 0:07:35.120 --> 0:07:39.240 wavelength is about six d and fifty nanometers or rnometers 0:07:39.280 --> 0:07:42.800 if you prefer, I do prefer nenometers. I'm saying nanometers. 0:07:42.840 --> 0:07:45.320 And then the blue laser has four hundred and five 0:07:46.040 --> 0:07:49.560 four and five nanometer wavelength. So that means that the 0:07:49.560 --> 0:07:53.520 blue laser can actually focus on a smaller bump than 0:07:53.680 --> 0:07:57.040 the red laser. Thus you are able to fit more 0:07:57.160 --> 0:08:01.640 bumps and uh and the flat tracks between bumps on 0:08:01.920 --> 0:08:05.480 a blu ray DVD than you would on a regular DVD. 0:08:06.920 --> 0:08:10.640 What this translates to for you and me mean is 0:08:10.720 --> 0:08:14.520 the dig capacity of storing a high definition film versus 0:08:14.520 --> 0:08:20.440 a standard definition film. Right, so high definition audio and video, 0:08:21.120 --> 0:08:23.560 why should just say high definition video? High definition audio 0:08:23.640 --> 0:08:26.720 doesn't really mean anything. High definition video takes up a 0:08:26.760 --> 0:08:30.840 lot of space, so much space that I A. If 0:08:30.840 --> 0:08:33.080 you want to try and pack more than an hour 0:08:33.160 --> 0:08:38.600 and a half of of a high definition content greater 0:08:38.679 --> 0:08:45.480 than seven lines of resolution, you're gonna need something besides 0:08:45.520 --> 0:08:48.400 a regular DVD, because even with video compression, it just 0:08:48.440 --> 0:08:52.120 can't do. Oh, I can't do it uncompressed, and um, 0:08:52.160 --> 0:08:56.240 even with video compression, it can't hold that much information. Really, 0:08:56.280 --> 0:08:59.680 a single layer DVD only holds four point seven gigabytes. 0:09:01.000 --> 0:09:04.360 I love that. I love only because I'm that's a 0:09:04.400 --> 0:09:06.880 lot of information. Yeah. I think back to I think 0:09:06.880 --> 0:09:11.560 back to the days of CDs coming out and thinking, Wow, 0:09:11.880 --> 0:09:14.840 on one disc, I can hold that much information? Who 0:09:14.920 --> 0:09:19.640 would ever need more than? Right? I mean seven hundred megs. 0:09:19.679 --> 0:09:22.320 I can't imagine filling up more than a hundred at 0:09:22.320 --> 0:09:25.760 a time. My first hard drive was forty megs. Yeah, 0:09:25.920 --> 0:09:29.840 I think mine might have been run around that same size. 0:09:29.840 --> 0:09:31.360 And before that didn't have a hard drive at all. 0:09:31.360 --> 0:09:33.840 It was all on floppy disks. But yeah, I mean 0:09:33.840 --> 0:09:36.319 a single layer of Blu ray in comparison, holds twenty 0:09:36.360 --> 0:09:38.920 seven gigabytes, and that's more than two hours of high 0:09:38.960 --> 0:09:43.440 def video or standard. Yeah. But the thing, the thing is, 0:09:43.480 --> 0:09:48.400 though DVD is only really equipped to do right well, 0:09:48.440 --> 0:09:50.520 I mean it can do seven twenty, It can do 0:09:50.679 --> 0:09:53.560 more than that or to, but it can't hold as 0:09:53.640 --> 0:09:57.839 much information. So, in other words, it can it can 0:09:57.920 --> 0:10:02.199 do it, it just has to. It's not gonna it's 0:10:02.200 --> 0:10:04.760 not gonna have as much. So like you can do 0:10:04.800 --> 0:10:08.560 the higher resolutions, but you have to. But you because 0:10:08.600 --> 0:10:12.000 that requires more information or more storage space, you can't 0:10:12.080 --> 0:10:13.839 store as much of it as you could on a 0:10:14.200 --> 0:10:17.920 blue ray. So again, DVD four point seven gigs, Blu 0:10:18.040 --> 0:10:22.160 ray twenty seven gigs. That's single layer on either case. 0:10:22.240 --> 0:10:28.120 Now you can double layer these discs. Uh. So a 0:10:28.160 --> 0:10:30.680 double layer Blu ray would hold up to fifty four 0:10:30.720 --> 0:10:34.760 gigabytes of data. Um. Now, when you're double layering, it's 0:10:34.800 --> 0:10:36.959 kind of an interesting thing. You've got two different tracks 0:10:37.000 --> 0:10:41.640 going uh along a disc. And here's another interesting thing, 0:10:41.640 --> 0:10:45.560 another thing that's different between uh, the digital discs and vinyl. 0:10:46.240 --> 0:10:48.840 With vinyl, you put the needle on the outer part 0:10:48.880 --> 0:10:51.280 of the record and it naturally works its way through 0:10:51.280 --> 0:10:55.120 the groove to the center. All right. With these digital discs, 0:10:55.160 --> 0:10:59.360 the laser, the freaking laser starts in the center and 0:10:59.480 --> 0:11:03.600 works it's outward toward the edge. Now, can you think 0:11:03.640 --> 0:11:06.800 of anything that could cause an issue as a laser 0:11:06.840 --> 0:11:09.680 moves from the center of a disk toward the outer 0:11:09.760 --> 0:11:11.760 part of a disk? I mean, other than like a 0:11:11.840 --> 0:11:13.960 scratch or a dog here, right, I'm just talking about 0:11:14.000 --> 0:11:17.120 a natural thing that will happen as you're moving from 0:11:17.200 --> 0:11:20.280 the center of a disk to the outside of a disk. Like, 0:11:20.360 --> 0:11:22.800 what happens to the speed of the data that's going 0:11:22.880 --> 0:11:26.560 by as you as your laser moves outward, Because yeah, 0:11:26.559 --> 0:11:30.440 it's it's gonna get slower. Well, the disk has to 0:11:30.480 --> 0:11:33.080 move slower. See, the problem is that it's gonna the 0:11:33.120 --> 0:11:36.760 data itself will actually move faster because you're talking about 0:11:36.760 --> 0:11:39.839 revolutions per second. Okay, if you keep your revolutions per 0:11:39.840 --> 0:11:42.880 second constant, then the data is going to stream by 0:11:42.960 --> 0:11:45.199 much faster toward the edge of the disk than it 0:11:45.200 --> 0:11:48.240 would towards the center. Say yeah, yeah, okay, that makes sense. 0:11:48.240 --> 0:11:51.120 And if you guys are having trouble imagining this, uh, 0:11:51.320 --> 0:11:54.960 just get a piece of paper, put something put like 0:11:55.000 --> 0:11:57.679 a little coin around, like maybe towards the center of 0:11:57.720 --> 0:11:59.360 the paper, and maybe another one toward the edge of 0:11:59.400 --> 0:12:02.920 the paper, and turn it one revolution. Now, in that 0:12:02.960 --> 0:12:06.280 one revolution, both coins just made one circle, but the 0:12:06.320 --> 0:12:08.400 one on the outer edge had to go a greater 0:12:08.520 --> 0:12:11.079 distance in that same amount of time. Therefore, the one 0:12:11.120 --> 0:12:14.600 on the outer edge is going faster. Okay, then, so 0:12:14.960 --> 0:12:17.959 in order to compensate for this, DVD players and Blu 0:12:18.080 --> 0:12:21.480 ray players actually physically slowed down the spinning of the 0:12:21.520 --> 0:12:25.640 disk as the laser moves towards the outer edge. Okay, 0:12:25.679 --> 0:12:29.080 so it automatically knows where where the laser is reading 0:12:29.480 --> 0:12:33.680 and adjusts the speed of the disc spinning. Right, because 0:12:33.520 --> 0:12:37.440 the arm that holds the freaking laser is always going 0:12:37.480 --> 0:12:40.400 to be in a specific location and that dictates how 0:12:40.480 --> 0:12:44.840 fast the disk needs to spin. Now, um with a 0:12:44.840 --> 0:12:46.559 double layer The reason why I brought this up is 0:12:46.559 --> 0:12:49.240 because with a double layer disk, it is possible to 0:12:49.400 --> 0:12:53.000 have one layer of information go from the inner edge 0:12:53.480 --> 0:12:55.920 to the outer edge of the disk, right, or from 0:12:55.960 --> 0:12:57.960 the center to the outer edge, I guess I should say, 0:12:58.000 --> 0:12:59.800 And then the second layer could start at the outer 0:12:59.880 --> 0:13:03.000 edge and work its way back into the center. And 0:13:03.040 --> 0:13:05.440 in that case, you would need to speed up the 0:13:05.480 --> 0:13:07.920 disk as it started getting closer and closer to the center, 0:13:08.000 --> 0:13:10.240 otherwise it would not be turning fast enough for it 0:13:10.280 --> 0:13:14.199 to read the information properly. Right. In other words, DVD 0:13:14.240 --> 0:13:17.280 players and Blu ray players make my head hurt because 0:13:17.320 --> 0:13:21.520 they require physics and I was an English major. And 0:13:21.840 --> 0:13:25.480 Blu ray transfers information faster too. I mean, it has 0:13:25.559 --> 0:13:29.400 a thirty six megabit per second data transfer rate as 0:13:29.440 --> 0:13:31.839 opposed to just ten make a bit per second for 0:13:31.920 --> 0:13:36.600 our DVD, right, which is also important to note. Right. 0:13:36.760 --> 0:13:40.480 So let's see what we got here. We've we've discussed 0:13:40.480 --> 0:13:42.800 the fact that since you are able to create smaller 0:13:43.280 --> 0:13:46.440 bumps in a Blu ray disk, you therefore can fit 0:13:46.559 --> 0:13:49.720 more bumps onto a disc than you could with a DVD. 0:13:49.840 --> 0:13:52.000 That's why you can store more information on it. That's 0:13:52.000 --> 0:13:54.360 why you can store high definition information on it, as 0:13:54.360 --> 0:13:56.240 opposed to a DVD, where you just can't. It's just 0:13:56.640 --> 0:14:00.160 not doesn't have the capacity. Here's another thing that the 0:14:00.200 --> 0:14:03.720 manufacturing process for the two different discs, it's different. Oh yes, 0:14:04.160 --> 0:14:08.400 Because the DVD is a sandwich. It has two pieces 0:14:08.559 --> 0:14:14.120 of polycarbonate plastic about zero point uh six millimeters six 0:14:14.160 --> 0:14:18.040 tenths of a millimeter um in thickness, and the material 0:14:18.360 --> 0:14:20.800 that has the information on it is sandwiched in between them, 0:14:20.800 --> 0:14:24.960 and the two halves are glued together. Um. Whereas the 0:14:25.000 --> 0:14:27.760 information on a Blu ray disc is actually on top 0:14:28.800 --> 0:14:34.080 um of a one point one millimeter thickness disc, which 0:14:34.120 --> 0:14:37.960 is really amazingly thin, I would think, um, But it 0:14:38.000 --> 0:14:40.680 does have a a plastic coating on top of it, 0:14:40.720 --> 0:14:42.200 a hard coating on top of it to keep it 0:14:42.240 --> 0:14:44.480 from I'm assuming its plastic. It has a hard coating 0:14:44.520 --> 0:14:46.760 on top of it to keep it from getting scratched. 0:14:47.240 --> 0:14:50.880 But it does also prevent distortion uh that you know, 0:14:51.000 --> 0:14:53.560 the plastic would cause as the laser would travel through it, 0:14:53.560 --> 0:14:59.040 which is called by refringence. It's it's kind of it's similar, Marty, 0:14:59.240 --> 0:15:03.160 but you know, bifrage. It's similar to you know, if 0:15:03.160 --> 0:15:06.840 you've ever if you've ever like looked at something through 0:15:07.600 --> 0:15:11.680 a really thick pane of glass or or underwater, you know, 0:15:11.800 --> 0:15:14.120 where you you look up through the water and you 0:15:14.160 --> 0:15:17.640 see something beyond the surface, and then when you do 0:15:17.880 --> 0:15:20.320 surface through the water, you realize that it's not exactly 0:15:20.400 --> 0:15:23.680 where I thought it was. It's similar to that. It's 0:15:23.720 --> 0:15:25.880 not the exact same thing, but you can think of 0:15:25.880 --> 0:15:29.360 it as uh analogous to it. But yeah, that can 0:15:29.400 --> 0:15:33.760 cause the uh, the red laser to have difficulty getting 0:15:33.760 --> 0:15:36.120 the information and it may even actually cause it to 0:15:36.320 --> 0:15:39.720 uh to skip right. Yeah, that and that's a that's 0:15:39.720 --> 0:15:42.000 what we call a bad thing. Yes, it means that 0:15:42.000 --> 0:15:43.760 you're not going to get the experience you want out 0:15:43.760 --> 0:15:46.120 of it. Also, a DVD has to be has to 0:15:46.120 --> 0:15:48.520 be flat for that reason. Has to be red flat, 0:15:49.200 --> 0:15:52.160 and Blu Ray disks do not necessarily have to be flat. 0:15:52.200 --> 0:15:54.280 I would assume though, that it would be preferable if 0:15:54.320 --> 0:15:58.880 they were flat. And uh there, because one of them 0:15:58.960 --> 0:16:00.440 is like one point one millim you're stick in the 0:16:00.440 --> 0:16:02.360 other as one point two millimeters stick. A Blu ray 0:16:02.440 --> 0:16:05.720 and a regular DVD look pretty much the same to us. 0:16:05.760 --> 0:16:07.960 I mean, like you said, is it in the encoding. Yeah, 0:16:08.000 --> 0:16:10.480 but it's also in the decoding, which would be the 0:16:10.600 --> 0:16:14.680 freaking lasers. Um, I'm gonna get so much mail about 0:16:14.680 --> 0:16:18.800 people who were tired of hearing freaking lasers. I expect 0:16:18.880 --> 0:16:21.840 you to. Liz probably will as well. She's kind of 0:16:21.920 --> 0:16:23.600 chuckling right now, but it's not gonna be as funny 0:16:23.600 --> 0:16:27.440 when you're editing, is it? Is it? Liz? Ha um? 0:16:27.520 --> 0:16:29.360 And of course you could always soundscape this to make 0:16:29.440 --> 0:16:35.280 me sound like and even she wanted. Now. The other 0:16:35.320 --> 0:16:37.400 interesting thing, we have articles, by the way, on both 0:16:37.440 --> 0:16:39.880 DVDs and Blue rays on how stuff works dot com, 0:16:39.960 --> 0:16:42.200 both of which I found incredibly informative while cramming for 0:16:42.240 --> 0:16:45.480 this podcast. Yes, and they have some great illustrations as well. 0:16:45.560 --> 0:16:48.560 So if you're having if you're having problems, imagining what 0:16:48.600 --> 0:16:51.200 it is we're talking about. I do highly recommend you 0:16:51.200 --> 0:16:53.280 guys check out these articles because it will give you 0:16:53.320 --> 0:16:56.920 a visual sense of the things that we're explaining. But 0:16:57.160 --> 0:16:59.000 one of the things I thought was interesting that they 0:16:59.040 --> 0:17:03.320 pointed out um in these articles is that the manufacturing 0:17:03.400 --> 0:17:06.719 process for the Blu ray disc, even though it's different 0:17:06.760 --> 0:17:09.760 from the way DVDs are created, it is not more 0:17:09.840 --> 0:17:14.479 expensive than the way DVDs are created. So then why 0:17:14.560 --> 0:17:17.160 would you say Blu ray discs cost so much more 0:17:17.200 --> 0:17:19.119 in the stores. I think there are a couple of 0:17:19.119 --> 0:17:22.440 different reasons. One is that it's a premium product, so 0:17:22.560 --> 0:17:25.560 you are buying a high definition products so that you 0:17:25.560 --> 0:17:28.640 can the experience that you will get watching a Blu 0:17:28.760 --> 0:17:31.639 ray disc using a Blu ray player on a high 0:17:31.720 --> 0:17:34.880 definition television. All of that is important. If you don't 0:17:34.880 --> 0:17:37.399 have a high definition definition television, this isn't gonna do 0:17:37.440 --> 0:17:40.440 any good. So but the experience of watching one of 0:17:40.480 --> 0:17:43.960 those on an HDTV with right cable connectors, using the 0:17:44.040 --> 0:17:47.399 right equipment, it's gonna be It's gonna be noticeable. It 0:17:47.480 --> 0:17:51.600 may not be as huge a leap as DVD was 0:17:51.720 --> 0:17:55.600 from VHS, but it's still going to be noticeable. The 0:17:55.680 --> 0:17:58.199 other reason is that because the Blu Ray has a 0:17:58.200 --> 0:18:02.360 greater capacity, you could actually pack more specials and UH 0:18:02.359 --> 0:18:04.960 and extras on a Blu Ray disc then you could 0:18:04.960 --> 0:18:07.040 on a DVD. And a lot of companies do that. 0:18:07.359 --> 0:18:10.320 And thirdly, a lot of companies that are making Blu 0:18:10.440 --> 0:18:15.280 Ray players have made them Internet capable and you can 0:18:15.320 --> 0:18:19.400 actually access extra content through the Internet on your Blu 0:18:19.520 --> 0:18:23.160 Ray player and UH, a lot of companies are are 0:18:23.200 --> 0:18:26.040 making this available where you get, you buy the Blue Ray, 0:18:26.080 --> 0:18:28.560 you put it in your player, you started up, and 0:18:28.560 --> 0:18:32.760 then you can access extra content online and things like 0:18:32.920 --> 0:18:35.679 you know, new subtitles. Let's say that you um wanted 0:18:35.720 --> 0:18:38.119 to get a film but there was no you know, 0:18:39.320 --> 0:18:41.280 you wanted to You had a friend who was coming 0:18:41.280 --> 0:18:44.359 and their English wasn't so good, but they spoke fluent 0:18:44.480 --> 0:18:48.240 Portuguese and you don't have Portuguese normally on the disc. 0:18:48.320 --> 0:18:50.320 But if you pop it in you find out, hey, 0:18:50.359 --> 0:18:53.679 there's an option here where I can get Portuguese subtitles. 0:18:54.240 --> 0:18:57.040 Or it may be extra commentary. It could be anything 0:18:57.040 --> 0:19:01.080 from even extra content like deleted scene. Really pretty much 0:19:01.080 --> 0:19:03.680 anything that they can think of that the movie studios 0:19:03.720 --> 0:19:06.000 can think of could be part of this extra content 0:19:06.080 --> 0:19:08.439 that you can access with your DVD player, your Blu 0:19:08.600 --> 0:19:12.000 ray player, I should say, not DVD player. UM. Now 0:19:12.040 --> 0:19:14.199 you're limited mostly by a couple of things. One, you 0:19:14.240 --> 0:19:18.400 have to have a high speed Internet uh access point. Um. 0:19:18.440 --> 0:19:20.399 If you don't have that, then you're not going to 0:19:20.480 --> 0:19:23.840 be able to access all this content. Even if you 0:19:23.880 --> 0:19:26.199 could access it, it would take you so long to 0:19:26.280 --> 0:19:29.359 download any of it because it's it's high bandwidth stuff. 0:19:30.000 --> 0:19:32.040 If it's pointless, right, So you have to have a 0:19:32.080 --> 0:19:37.359 high speed Internet connection. And um, you also what was 0:19:37.400 --> 0:19:39.480 that I had to I had to and now I 0:19:39.520 --> 0:19:43.920 only have the one. Ah, it's gone. It's gone high 0:19:43.960 --> 0:19:49.560 speed Internet access. If it comes back, I'll shout okay. 0:19:50.000 --> 0:19:51.800 So one of the things I was hoping it would 0:19:51.800 --> 0:19:54.240 come back immediately, but no, it's not coming back immediately. 0:19:54.480 --> 0:19:57.320 You touched on something there though that I think uh 0:19:57.600 --> 0:20:01.960 might answer the listener meal question. And then I wanted 0:20:02.000 --> 0:20:04.400 to come back to because we were talking about why 0:20:04.520 --> 0:20:07.760 might you not be able to see the difference in 0:20:07.920 --> 0:20:11.679 a DVD and a Blu Ray or h D DVD 0:20:11.800 --> 0:20:14.000 for that matter of disc And I think it comes 0:20:14.000 --> 0:20:16.960 down to something we've talked about before. And that's the 0:20:17.040 --> 0:20:21.840 screen size and resolution of your TV. Yeah, it turns 0:20:21.880 --> 0:20:24.199 out that, uh, let's say that you if you have 0:20:24.280 --> 0:20:27.880 a larger television, you will notice these these differences a lot. 0:20:28.640 --> 0:20:31.480 They'll they'll they'll jump out out at you more. Um. 0:20:31.520 --> 0:20:34.760 If you have a smaller TV, the difference in resolution, 0:20:35.200 --> 0:20:39.479 UM isn't going to be quite as noticeable. But on 0:20:39.480 --> 0:20:44.280 that plasma you'll be able to pick it out. Yeah, obviously, yes, yes, 0:20:44.359 --> 0:20:48.000 but if you're talking about like a say, thirty inch television, 0:20:48.800 --> 0:20:52.600 and uh, you know, a thirty inch television, standard definition 0:20:52.640 --> 0:20:55.240 may look pretty good. High definition is gonna look fine. 0:20:55.320 --> 0:20:59.040 But you know, anything beyond seven lines of resolution you 0:20:59.119 --> 0:21:02.080 probably don't need. I mean, you probably wouldn't really know 0:21:02.200 --> 0:21:05.080 the difference between seven twenty which or your your two 0:21:05.119 --> 0:21:08.359 main kinds of high definition TV in the United States, 0:21:08.960 --> 0:21:10.960 the seven twenty lines of resolution or the ten eight 0:21:11.080 --> 0:21:14.160 lines of resolution. Um. Now, if you have and even 0:21:14.200 --> 0:21:16.320 if you have a bigger TV, some would argue that 0:21:16.600 --> 0:21:21.280 the difference is really not that noticeable. So when I 0:21:21.320 --> 0:21:23.240 say bigger TV, I'm talking like in the fifty to 0:21:23.359 --> 0:21:26.480 sixty inch range, which is that's pretty big. I mean, 0:21:26.520 --> 0:21:28.840 there are larger televisions out there, and of course you 0:21:28.840 --> 0:21:31.800 could get say a projector, which would you know, a 0:21:31.840 --> 0:21:34.439 digital projector is going to make an even larger picture. 0:21:34.920 --> 0:21:37.280 And in that case, yeah, you may need some sort 0:21:37.280 --> 0:21:40.719 of equipment that will provide a ten a D resolution 0:21:40.920 --> 0:21:43.199 or else it's just gonna look kind of blocky, and 0:21:43.640 --> 0:21:45.440 you know that it's not gonna it will look muddy 0:21:45.480 --> 0:21:51.080 and not as not as crisp. Right. That I think 0:21:51.200 --> 0:21:53.680 is probably the the crux of the situation right there. 0:21:53.760 --> 0:21:55.800 And also there are a lot of DVD players out 0:21:55.800 --> 0:21:59.320 there now that up convert uh signals now an up 0:21:59.320 --> 0:22:01.760 converting d v D. What that does is it tries 0:22:01.800 --> 0:22:04.359 to add in some of the information that is lost 0:22:04.440 --> 0:22:07.679 during the video compression process. Because again, to get a 0:22:07.720 --> 0:22:11.199 movie onto a DVD DVD, I don't know where that 0:22:11.240 --> 0:22:15.480 came from onto a DVD, I tell you it's because 0:22:15.480 --> 0:22:19.960 this studio so hot today, so warm in here today. Um. 0:22:20.080 --> 0:22:22.239 But in order to get the information on there, they 0:22:22.320 --> 0:22:26.000 use a compression format and uh, and you tend to 0:22:26.080 --> 0:22:30.000 lose information when you compress it, and so an up 0:22:30.040 --> 0:22:34.120 converter tries to add in information to create a more 0:22:34.680 --> 0:22:38.679 high definition experience, even if the source material itself is 0:22:38.680 --> 0:22:41.960 not high definition. So if you have an up converting 0:22:42.040 --> 0:22:44.399 DVD and a Blu Ray player, and you have a 0:22:44.480 --> 0:22:46.439 copy of the movie on DVD and a copy of 0:22:46.440 --> 0:22:50.440 the movie on Blu Ray, the differences maybe subtle. They 0:22:50.560 --> 0:22:54.200 you should probably still notice them. I mean, it's it's 0:22:54.240 --> 0:22:56.800 not like, uh, it's not like it's you know, it 0:22:56.840 --> 0:22:59.879