 |
| |||||||||||||
03-15-2002, 06:06 PM
|
#1 |
|
HDTVoice Member
Join Date: Mar 2002
Posts: 16
|
How important is 720p?
Some of the HDTV's and receivers I've been looking at (example : Sony) only support 1080i and 480p...
Should I eliminate them from my list just because they can't do 720p? Or is it simply a decision of whether I want to be able to watch ABC's HD broadcasts since they seem to be the only ones using this particular format... Thanks in advance & pardon my HD newbie-ness. |
|
|
|
03-15-2002, 07:40 PM
|
#2 |
|
Reged User Tier 2
 
Join Date: Mar 2002
Location: Palo Alto, CA
Posts: 67
|
All 1080i sets upconvert 720p to 1080i. 720p is a good mode but adds costs to implement it natively, much cheaper/easier to upconvert.
|
|
|
|
|
03-15-2002, 07:51 PM
|
#3 |
|
HDTVoice Member
Join Date: Mar 2002
Posts: 16
|
tx
Cool, thanks!
|
|
|
|
|
04-02-2002, 02:04 PM
|
#4 |
|
HDTVoice Member
Join Date: Mar 2002
Location: Southern California
Posts: 3
|
I wouldn't buy a display device unless it did 720P. It does look different than 1080i. I like 720P pictures better than 1080i. I watch more movies but I hear 1080i is better for sports.
This is something that the salesman won't tell you is that the scan rate for 720P is about 45 KHz and 1080i is about 33 KHz. Higher scan rate=more money. It costs a little more to have 720P so you can see why the manufacture's don't include it. Your display should do 720P. It's part of the ATSC standard. Unlike Sony using 540P which is not. This is only my opinion but I wouldn't buy a Sony if it is a Direct View CRT. |
|
|
|
| HDTVoice Sponsors |
|
|
|
04-02-2002, 02:47 PM
|
#5 |
|
un-banned
 Join Date: Feb 2002
Location: ?
Posts: 7,165
|
Help me out here.. How many HD monitors display 720? All do 1080i, don't they? So if your TV does 1080i and not 720p, why do you need a STB that will send a 720p signal to your TV?
|
|
|
|
|
04-14-2002, 07:36 PM
|
#6 |
|
HDTVoice Member
Join Date: Apr 2002
Location: Philly
Posts: 7
|
720p...
I've looked at the specs for all the CRT-based RPTVs out there, and I couldn't find a single one of the RP's that displays 720p. Many of them "support" 720p, but when you read the manual, you'll find a sentence buried somewhere that informs you that the set will not display it, but instead down-converts it to 480p. Even the Pioneer Elite. Some of the sets based on other technologies, like plasma and DLP will display 720p, but the price is pretty steep. Basically, unless you have $6000 or more to spend or you are willing to wait a year or two, forget about 720p. 1080i will have to do.
|
|
|
|
|
04-15-2002, 05:01 PM
|
#7 |
|
HDTVoice Member
Join Date: Apr 2002
Location: Dayton OH
Posts: 24
|
Let's face it... 720p is a higher resolution than most folks' 1080i, even considering the horizontal resolution. Most consumer TVs can't provide much more than 1000 lines of horizontal resolution due to bandwidth limitations, not even 1280, and certainly not the 1920 of 1080i. 720p provides higher resolution per field, without the motion artifacts of interlace. But as previously mentioned, most manufacturers are too cheap to provide the additional vertical scan rate for 720p, especially since they haven't funded the bandwidth for it, much less 1080i.
720p isn't "upconverted" to 1080i. On most consumer-grade sets and STBs, it's scaled down to 540p, which is reported by the TV to be 1080i since the scan rates are the same. The 1280 resolution is still there, but it just can't be displayed distinctly on most sets. It is neither "upconverted" to 1920 lines of horizontal resolution (which would be a waste on most TVs) or "downconverted" to the 960 lines 540p would have in 16:9. The Sony HS series scales it down to 480p (don't know about other Sonys like the XBRs). Recent Toshiba sets get by with one scan rate by also scaling 480p, in addition to 720p, to 540p. The high horizontal resolution of 1080i, that most folks can't view anyway, just means it has to be compressed more for transmission. And compression isn't a good thing. |
|
|
|
 |
«
Previous Thread
|
Next Thread
»
| Thread Tools | Search this Thread |
| Display Modes | Rate This Thread |
Linear Mode
|
|
All times are GMT -5. The time now is 06:54 PM.