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Specs for HD TV ?
Posted 12 October 2007 - 09:22 AM
If you had to chose say the top 5 specifications that really are important for excellent picture quality, what would they be?
for instance, I've been told that true HD is a minimum of 1980x1024. Why is a 1024x768 *not* HD ?????
What about Image and Dynamic Contrast ratios? for instance one model is rated as 900:1 and 1800:1, and another one is 1100:1 and 8000:1 --- why does that matter?
Picel response time - does the difference betwe say 5 & 8 ms really matter? Will it be that noticable?
Any help - or point me to a web site document that spells this out - would be appreciated.
Posted 12 October 2007 - 10:54 AM
Why is 1024:768 not HD? Well, you will want HD to have a 16:9 aspect ratio. That's a ratio of 1.78. If you divide 768 into 1024 you get 1.33. So you can't scale a HD picture into that pixel pattern to fill the screen and see the entire picture.
You will find lots of debates about what you can see versus viewing distance from the screen and if there is visible a difference between 1080p and 1080i. Plasma vs LCD.
If the family doesn't need to go without winter cloths, set your budget in the $2000 range and buy a Full HD 1080p (1920:1080 pixel) set. You can find some nice current model sets in that price range. Then you won't need to agonize over pixel counts and i vs p scanning. And that set will work wonders with a blue laser type disk player.
Contrast ratios are somewhat elusive. Brightness and contrast interact. When I did some TV work back in the analog only days, I could only see only about 10 gray steps from white to black. I'm fairly sure modern digital monitors are considerably better than that. I guess there is a point of diminishing returns on that matter once you exceed 1000. Perhaps someone with a calibration experience can help you here.
Also look for several HDMI connectors. You will soon have connect a set top box and DVD player as minimum requirements.
I don't recommend sets because everone sees differently. But I will say, during a recent viewing of 2007 Full HD LCD sets, I was favorably impressed with Sony, Mitsubishi, Sharp and Samsung in roughly that order.
That's my analysis.
Posted 12 October 2007 - 11:01 AM
Posted 12 October 2007 - 11:27 AM
Next, decide the size.... seems like you have decided on 42"... but don't forget to factor in the size of the cabinet itself... Plasma's and LCD Flat panels take up less space that a Rear Projection DLP TV would, so keep that in mind.
Step 3, figure out how far you are going to be sitting from the TV... unless its like 6 or 7 feet, at the 42" size, 1080P probably won't be noticeable versus 1080i at distances farther than that.... so save your money unless you have a pretty compelling reason to spend more.
Step 4, What are you going to be doing with this TV... Watching movies, playing video games, Normal everyday use that combines the 2, how bright is the room its going in... LCD's are brighter, Plasmas have better color/black levels and are better at reducing motion blur... DLP's are less expensive for the size but have color banding issues... Projectors need Dark rooms... etc. Use these requirements to further narrow your candidates.
Lastly, buy the best tv that you can afford that meets all of the earlier requirements. Definitely shop around, once you have narrowed the field down to 2 or 3 different models. Head to Best Buy or where ever and see them in person... Beauty is in the eye of the beholder.
I would also recommend checking out http://www.avsforum.com. There are forums there on most of the current models that current owners and prospective buyers post in about all the pros and cons of a given model. I bought a Panasonic TH-50pz700u buy doing much of what I mentioned above... turns out that my choice was a good one... I love the TV...and then I found out that it was voted #1 by consumer reports after I bought it...which makes me feel all the more confident that my research paid off. There are so many choices out there nowadays, that you have to narrow the field by setting up some pretty specific requirements before hand, otherwise you will find yourself feeling overwhelmed.
Posted 13 October 2007 - 09:54 AM
1080i (1920x1080 native resolution).
1000 to 1 contrast ratio or better.
2 or more HDMI inputs.
2 or more Component Video inputs.
ATSC (digital) and NTSC (analog) tuners built in.
I've got a 46" Sharp LCD and a 40" Samsung. I recommend either. I would stay away from anything Costco, Walmart, Kmart, or similar discount houses offer. Even Target rarely carries anything meeting my specs. BestBuy has one 42" 1080p Panasonic Plasma in it's current ad selling for $1689. Very close to the minimum price you should expect to pay for a 42" panel worth having.
Posted 13 October 2007 - 11:06 AM
Posted 13 October 2007 - 11:15 AM
Posted 13 October 2007 - 11:18 AM
A critical consideration now and into the foreseeable future is the performance with SD content, so don't forget to factor that in. Some HDTVs have a serious problem with SD programming.
Posted 13 October 2007 - 03:26 PM
Thank you so much for the analysis... My confusion started when looking at the budget-conscious 42" sets at Costco (around $1,200) ... I saw a 1080p HDTV LCD set that was only 1024x768 ... and the debate started. It looked good to the eye, but the specs started the questions.
I'm confused as to where you saw this resolution at Costco. Every set I've seen there that was 1080p has the true 1980X1080 resolution. You'll find good buys in either the Philips or the Vizio Galevia at your price point. I'm not too keen on Sceptre. I purchased a 37 inch 720p Vizio at Costco a while back and am very satisfied with it.
Family Room: Sony KDFE-55A20 55" LCD RPTV; Yamaha RX-V663 AVR. Paradigm speakers - Focus fronts, CC170 center, PDR-8 subwoofer, Atom surrounds, ADP rear center; TiVoRoamio Plus, LG BH200 HD DVD/Blu-ray player via HDMI to AVR
Bedroom: Vizio 42" 3D TV, Pioneer VSX-521-K AVR, Panasonic 3D DVD player, Energy Take Classic 5.1 speakers, Roku 2 XD, TiVo Premiere, Insignia HD radio tuner, Toshiba HD DVD player
Posted 28 October 2007 - 04:12 PM
Posted 23 November 2007 - 05:53 AM
Posted 23 November 2007 - 05:54 AM
Aspect ratio : 16:9
Brightness : 500 cd/m2
Contrast ratio (typical) : 1100:1
Dynamic screen contrast : 8000:1
Response time (typical) : 5 (BEW equiv.) ms
Viewing angle : 176° (h) / 176° (v)
Diagonal screen size : 47 inch
Display screen type : LCD Full HD W-UXGA active matrix
Panel resolution : 1920 x 1080p
Picture enhancement : Perfect Pixel HD Engine, Digital Natural Motion, Dynamic contrast enhancement, 1080p 50/60Hz processing, 3/2 - 2/2 motion pull down, 3D Combfilter, Active Control + Light sensor, Jagged Line Suppression, Progressive Scan, Widescreen Plus
Screen enhancement : Anti-Reflection coated screen
Posted 23 November 2007 - 07:05 AM
Posted 25 November 2007 - 06:42 AM
Posted 25 November 2007 - 07:41 AM
The Internet is a wonderful place to look up registered trademarks like Ambilight. Note that the TV must be mounted on a flat, smooth wall to take advantage of this feature (the web page shows why textures are bad).
what is a 2-channel active Ambilight?
The higher the ratio, the better.
on a contrast ratio is a lager number better, for example is a 5000:1 contrast ratio better than a 1000:1 contrast ratio?
Contrast is the extremes of bright and dark. Contrast ratio is the difference between the brightest and darkest. Many LCD TVs and displays don't have very good blacks so it usually ends up being a measure of how dark the display can get.
what is it a ratio of?
Consider shopping at a specialty store if you don't think you can get your head around what's important and what isn't. Good customer service is the only way they survive against the big box stores.
plus the people that work at major retail store only want to sell so i really dont trust them.