will bluray truly be the next media format?

[oxygenuk]

as u can see, dvd now has us all currently hooked, will bluray stay around long enough to make it like it is with dvd and vhs right now? and how long do u expect the lifespan of bluray to be? will 100gb be enough to make bluray last longer than dvd?

ps: whats the size diffrence in gb between vhs tapes and dvd discs?

[zombie]

I believe Blu-ray will become the standard for home video and will remain the format of choice for all Hollywood studios for at least 15-20 years. There will probably be an advanced version of Blu-ray a few years down the road though. The change from standard TVs to HDTVs is a huge and slow process, high definition is going to be with us for a very long time. Blu-ray provides that so any talk of higher resolutions than 1080p aren't likely to catch on since the vast majority of us won't be able to enjoy them on any TV we own.

[erdega79]

difference between vhs and dvd was not that great. It's pretty much the same resolution with dvd being able to do progressive scanning and of course convenice of digital media, which in this case meant no rewinding and some interactivity.

I would say blu ray will be a standard for at least 20 years in audio/video and computer storage but will last much longer because it's very versatile and has great potential that is not yet fully explored. I expect blu ray to grow beyond 200GB eventually with expansion of single layers and various different techniques such as perpendicular recording that will keep the format fairly future proof. It's tailor made for that purpose. Since it will take a long time for cable/satellite companies to actually broadcast 1080p, blu ray will be the only solution to watch a true hdtv on.

I believe also that on the business side there will be a different type of storage solution available that's more robust but also more expensive.

[Blu-Wave]

Hi OxygenUK,

A single D-VHS tape - as used in the D-Theatre high definition system - can hold around 50GB of data, I believe, so a dual-layer (and above) BD should be able to compete on quality terms using MPeg2 and do better with well-sorted MPeg4, and be more compact and with potentially cheaper and more convenient media. :?

Note that Blu-ray is currently specified with 1080p24, 1080i50 and 1080i59.94. The plan is to move it well past 1080p100 over time and hence to provide much more natural looking motion than the jerky, stuttering, unstable form that is 24fps. :P

[oxygenuk]

thank to the above 3 posters ..

does anyone know the transfer rate diffrence between dvd and blyuray also please, thanks

[The Cyndicate]

Someone in the topic is insane,....














erdega79

[zombie]

Originally Posted by The Cyndicate

Someone in the topic is insane,.... erdega79

Rather than simply call someone "insane," would you care to explain what part of erdega79's post you disagree with?

[erdega79]

Originally Posted by The Cyndicate

Someone in the topic is insane,....














erdega79

Hmm, can you clear out what you mean?

[Rob]

Originally Posted by erdega79

difference between vhs and dvd was not that great. It's pretty much the same resolution with dvd being able to do progressive scanning and of course convenice of digital media, which in this case meant no rewinding and some interactivity.

I think this is what he was refering to. Still, he should have been less insulting. Anyway, in my mind there is a huge difference between vhs and dvd. For a start you have at least double the number of horizontal lines. Then you have prog scan, (as you said), and then it's a digital signal on a medium that doesn't degrade like tape over time, (not that it will last forever though). Plus dvd doesn't suffer the same number of picture flaws that vhs does. I pretty much stopped buying tapes in the mid 90's because of their poor quality. Especially when tv broadcasts were better looinng and tapes were so overpriced vs copying them off of tv.

[erdega79]

Originally Posted by Rob

I think this is what he was refering to. Still, he should have been less insulting. Anyway, in my mind there is a huge difference between vhs and dvd. For a start you have at least double the number of horizontal lines. Then you have prog scan, (as you said), and then it's a digital signal on a medium that doesn't degrade like tape over time, (not that it will last forever though). Plus dvd doesn't suffer the same number of picture flaws that vhs does. I pretty much stopped buying tapes in the mid 90's because of their poor quality. Especially when tv broadcasts were better looinng and tapes were so overpriced vs copying them off of tv.

Ok, I may have understated it. Dvd is significantly better than vhs no doubt.One of the biggest benefits to DVD is definitely the video quality. This is because a standard VHS signal only has 320 dots per line but a DVD signal has 720 dots per line. This makes DVD horizontal resolution 2.25 times better than VHS. Along with digital benefits of no rewind, quickly going to a specific scene and many oters, it's easy to see why dvd succeded for the time being

I was estatic the first time I viewed dvd movie the same way I was estatic first time I listened to a cd. Over time though, I've learned about the limitations of both and my eyes and ears got trained more to recognize these limitations. Both dvd and cd are heavily compressed and had no potential and flexibility for growth and they are what they are. Technology like blu ray which is supposed to replace them is supposed to last much longer because of it's flexibility and that to me is very exciting and my excitment about cd and dvd is almost completelly gone which simply makes me wait for their demise.

[Rob]

So if you consider you have double the number of horizontal lines, and 2.25 times the number of pixels per line, dvd has over 4 times the effective resolution of vhs. Pretty similar to the advantage 1080p Blu-Ray has over dvd. I was so impressed with dvd when I first saw it that it kick started my passion for movies. Infact I bought more films on dvd in the first year or so than I had on tape in 15-20 years.

[john_1958]

yeah it would be interesting to see which format succeeds
blu-ray or hd-dvd or holographic versatile card that can hold 30 gb as well as 1024 gb at $2000

[tron3]

Originally Posted by oxygenuk

...
ps: whats the size diffrence in gb between vhs tapes and dvd discs?

That is a truly odd comparison. Physically, it's like comparying apples to watermelons. VHS has no GB rating, however.

Let us speculate. If a 2 hour DVD is equal to a 4.7 GB, then a 2 hour VHS is equal to about 2.35 GB. Why Half? DVD displays the full 480i lines of video. VHS only holds 240 lines of resolution. Assuming the above statement of 320 dots per line, then the data becomes less than half. Maybe down to 1.2 GB.

This assumes static data with no compression, or error correction. Even then, this may not be a precise estimation, but it's pretty close. Anyone know different?

I recall YEARS ago in the late '80's someone came out with a tape backup for pc that uses VHS. I don't recall the exact capacity, but it was high.