-
Join the MyBroadband community
South Africa’s biggest forum. Discuss, discover, and connect with thousands of members.
-
Question of the Day: What is your non-negotiable item, device, or app for international travel?
What to look for when going HD
- Thread starter rpm
- Start date
Here is a very important link. Use this to decide the size of FULL HD set you wanna buy.
http://www.engadgethd.com/2006/12/09/1080p-charted-viewing-distance-to-screen-size/
http://www.engadgethd.com/2006/12/09/1080p-charted-viewing-distance-to-screen-size/
Arthur
Honorary Master
CRT tubes in plasma screens?
vodacom3g
Vodacom Representative
There are a couple of very elementary mistakes in this article and this can just lead to confusion.
"They also *might* differ from Full HD televisions in the respect that they are oftern not equipped with a built-in HD-capable tuner, which in SA terms is not used in any case. [-]This means that[/-] HD-ready units can accept a high definition signal but the final display is dependent on the resolution of the television itself."
The fact that some TV's might have a tuner built in does not automatically make them full-HD. Rather this should have read:
"They also *might* differ from Full HD televisions in the respect that they are oftern not equipped with a built-in HD-capable tuner, which in SA terms is not used in any case. [-]This means that[/-] HD-ready units can accept a high definition signal but the final display is dependent on the resolution of the television itself."
Crazy statement. Although CRT and Plasma are both phosphor devices, CRT tubes are huge things (as found in traditional televisions). Would love to see Plasma with a CRT per pixel. Would be about 200m in width!
Last edited:
Thanks for the feedback about this article. Tom is new and I am certain he will find it valuable. We will also check the statements more thoroughly next time.
I agree with what you said, except for the part about it being a "Crazy statement".
SEDs do just this; A CRT (albeit tiny) behind every pixel.
Tinuva
The Magician
I noticed a tiny mistake in the article. It claims that full hd has a resolution of 1900x1080 while it really is 1920x1080 for 1080p. I know this because that is the resolution my TV is set to on my pc.
This can also be double checked with the resolution list on http://en.wikipedia.org/wiki/High-definition_television
This can also be double checked with the resolution list on http://en.wikipedia.org/wiki/High-definition_television
vodacom3g
Vodacom Representative
Maybe it was a bit harsh statement but in the well accepted definition of a CRT, the statement does not make a lot of sense.
As you'll know, in CRTs there is typically an electron gun per colour that fire the electrons at the phosphor dots which then emits the red, green or blue light. In plasmas, the plasma gas is excited, it produces electrons and these hit the tiny phosphor dot to again create the colour.
While SED is very similar to CRT in that it uses high voltage to accelerate electron to the phosphor, the physical construction is very different. More like a plasma with high voltage and no plasma!
But I take you point.
I think an important take home message is that resolution, size and contrast ratio matter a great deal. Size is often something very neglected as companies will push their FULL HD product and overpriced BD player to drive up sales of associated BD titles (overpriced too).
However when the set is too small for your room, you don't really see full HD. BD storage space is adequate for full HD but when will we see cheap 60-70 inch TVs with FULL HD? Next the OLEDs. They are currently available in 20 inches but that is tiny - and a 50-60 inch OLED will probably cost a million Dollars right now.
Sadly until full HD sets reach proper affordability and size - up to 100 inches, there will be little benefit for most users of Bluray.
However when the set is too small for your room, you don't really see full HD. BD storage space is adequate for full HD but when will we see cheap 60-70 inch TVs with FULL HD? Next the OLEDs. They are currently available in 20 inches but that is tiny - and a 50-60 inch OLED will probably cost a million Dollars right now.
Sadly until full HD sets reach proper affordability and size - up to 100 inches, there will be little benefit for most users of Bluray.
vodacom3g
Vodacom Representative
To get the intended effect of a 1.78 (16x9) screen, your viewing angle should be between 30 and 36 degrees. For 2.35, it's 39 to 45 degrees.
Obviously changing the width of the screen depending on the source can only be done with a projector, so with a panel display, probably aim for between 36 and 39 degrees viewing angle.
Obviously changing the width of the screen depending on the source can only be done with a projector, so with a panel display, probably aim for between 36 and 39 degrees viewing angle.
One peripheral point to remember is the proposed definition standard for the broadcast of digital TV - limited to 720p for the foreseeable future as far as I can see. So if you only want HD TV to see broadcast material you could probably save a bit of money. Of course to watch Blu-Ray you need full 1020p.
One other thought - I find these large TV screens quite overbearing in a normal-sized living room. My own soution is to use a HD projector connected to a PC and a roll-down screen. I'd recommend it as an option worth considering. My experience also suggests that the choice of PC software to drive the projector is an important factor.
One other thought - I find these large TV screens quite overbearing in a normal-sized living room. My own soution is to use a HD projector connected to a PC and a roll-down screen. I'd recommend it as an option worth considering. My experience also suggests that the choice of PC software to drive the projector is an important factor.
It's a good idea however there are drawbacks.
1. FULL HD projectors are super expensive - at least R30,000.
I think one of the dealers on MyBB sells these but they aren't cheap,
still full HD projectors were R200,000 a couple years ago.
2. The bulb tends to burn out after a while OR it can happen at any time and is not covered by the warranty.
3. You need a very dark room.
The Benefits are of course that if your room is large enough and the lens
good enough you can view a 70-100 inch diagonal image and enjoy the full benefit of HD. In that case HD projectors are affordable because a 70 inch
set will cost you more than R30K.
killadoob
Honorary Master
70-100?
you means 100-300
you means 100-300
70-100" diagonal
That's the standard method of measuring monitors and screens, inches diagonally across, assuming a standard 16:9 wide screen aspect ratio.
I think if you blew up HD picture to 300 inches diagonally in your huge banquet hall, the HD picture would lack detail. You'd need 4K or something better.
http://techmall.biz/sony-vplhw10-projector-p-3642.html <--- This one, it's R35,000 but is full HD.
http://techmall.biz/epson-emptw680-projector-p-3545.html <--- 720p projector for R15,000. I can't find the Epson EMPTW1000 which was native 1080p like the Sony above.
Last edited:
avr-rulez
Expert Member
imo any LCD pixel speed slower than 5ms should only be bought on a tight buget.
2nd its not black to black it is grey to grey time on a LCD
2nd its not black to black it is grey to grey time on a LCD
Actually the specification is for black-to-black, but this happens so seldom that grey-to-grey is more useful. Grey-to-grey is a more relaxed "specification"; the numbers will be lower for G2G than B2B.
jetlee
Senior Member
I know this has been mentioned before .. but it could do with a little re-mention. It is NOT likely that in the next few years South Africa will be broadcasting in 1080p (ROFL .. we dont even have digital yet ..).. which means, that if you plan to watch MOSTLY TV .. a Full HD set is a complete waste of money. If on the other hand, you are a movie junky with a Blu-Ray player or Media Center .. then Full HD may be worth investigation, as although the Picture quality is only marginally better, this becomes exponential as the size of the display is increased. IE .. 32 inches = hardly going to notice .. 50-60 inches .. perhaps seriously consider Full HD if you watch movies.
My 2 cents
My 2 cents
