AVS Forum banner
Status
Not open for further replies.
1 - 7 of 7 Posts

·
Registered
Joined
·
1,974 Posts
Discussion Starter · #1 ·
Ok,


I have read about eighteen different thoughts on how the HLN617W and similar sets treat 480i, 480p, 720p and 1080i sources coming from a set top box. Nine of which say that the TV is 720p native and ALL rates are upscaled to 720p... nine of which say that the native display is 720p and everything except 1080i source are scaled to 720p, but 1080i is passed through without side conversion.


Does anyone know for CERTAIN what the heck happens with this set?


I'd like to set my TS-160 to the best output resolution possible given that there are a few stations that broadcast 720p natively and the others are 1080i.


Thanks,

Jeff
 

·
Registered
Joined
·
339 Posts
All non-CRT based "pixelated" displays (LCD, DLP, LCoS, etc.) require that any input signal be scaled to the configuration ("native" format) of the display's sampling grid. A 1080i input would have to be scaled to the DLP's 1280 x 720 matrix, progressive scan, just like any other non-conforming input signal format.


What you have to determine is whether there is a discernible difference in the quality of this "side-conversion" between the STB and the RPTV and, if so, set your system up accordingly.
 

·
Registered
Joined
·
399 Posts
I agree with the post above that everything is scaled to 720p.

Something to consider though is that for 1080i the HLN617 has the Faroudja FLI2300, likly the best for dealing with 1080i, so the set may be best for this conversion. But if you set the STB to ouput 1080i then the 720p source gets converted to 1080i and back again.
 

·
Registered
Joined
·
787 Posts
Quote:
Originally posted by MattJ
I agree with the post above that everything is scaled to 720p.

Something to consider though is that for 1080i the HLN617 has the Faroudja FLI2300, likly the best for dealing with 1080i, so the set may be best for this conversion. But if you set the STB to ouput 1080i then the 720p source gets converted to 1080i and back again.
So, what is the best compromise? since one can't go back and forth adjusting and re-adjusting the STB's output. Given that some stations output at 720p and others at 1080i etc, at which output should the STB be set?
 

·
Registered
Joined
·
1,330 Posts
Don't any of the STBs have a "native" mode where they just render the signal unmosleted in it's antiove format? IE: the box spews 720p for 720p signals and 1080i for 1080i signals?


My old HDD-200 HD side car for my 4DTV does that.
 

·
Registered
Joined
·
787 Posts
Quote:
Originally posted by ianken
Don't any of the STBs have a "native" mode where they just render the signal unmosleted in it's antiove format? IE: the box spews 720p for 720p signals and 1080i for 1080i signals?


My old HDD-200 HD side car for my 4DTV does that.
The Scientific-Atlanta STB used by TWC in NYC does not appear to have such a mode. You have to select a scan rate, witness this passage from the official site:


"The 3250HD can output video to the HDTV display in four resolutions: 480i, 480P, 720P, or 1080i. These resolutions, or scan rates, allow consumers to select the scan rate best suited for their HDTV set."
 

·
Registered
Joined
·
1,394 Posts
Quote:
Originally posted by MattJ
Something to consider though is that for 1080i the HLN617 has the Faroudja FLI2300, likly the best for dealing with 1080i, so the set may be best for this conversion.
The Faroudja FLI2300 deinterlaces and scales 1080i to 720p?
 
1 - 7 of 7 Posts
Status
Not open for further replies.
Top