AVS Forum banner

Status
Not open for further replies.
1 - 20 of 21 Posts

·
Registered
Joined
·
438 Posts
Discussion Starter · #1 ·
I have a Panasonic 32" 4:3 HDTV that forces the squeeze on 1080/540 resolutions. Have been trying to get a 480P signal to work well enough to feed an HTPC signal so I can use it as a media server for Music and DVCR use. I have it working on 640x480 but the picture is about 2" short on each side and also has a strange look to text (seems to go darker then lighter every half second or so, not alot but ebough to be distracting).


As DVD's are 720x480 is it possible to get a 480P (31.5 sync) timing for powerstrip, everyone I have found goes to 33.5 sync which forces the squeeze. Or how can I fix the 640x480 issues. Al help very much appreciated.

Please don't reply with get a 16:9 TV. I allready have a 16:9 large sceen in the Home Theater for watching 16:9 content in all it's glory. This TV is for a different perpose.


Thanks in advance.
 

·
Registered
Joined
·
449 Posts
Hi, I have a pany 32" 4:3 (CT-32HX40) and had some trouble getting it setup with 640x480 too... I ended up with 640x400 or something like that... it was one of the choices in powerstrip and it synched well with my TV. You do end up with a little bit of black bars on the top & bottom (and sides if you maintain aspect ratio of your 4x3 movies).


However, the picture quality is noticebly worse than 960x540p. I have personally decided to stick to the "squeezed" mode and deal with overscan by increasing the size of the taskbar. I may try to fix the vertical overscan at some point in the future, but I was just happy to get it working and looking good (MUCH MUCH cleaner than using the S-Video from my ATI Radeon 7500).


What are you using for a transcoder? I originally tried an AA transcoder, but couldn't get my machine synching properly, so I returned it. I now have the KD-VTCA2 running in "auto" mode.


Jeff
 

·
Registered
Joined
·
438 Posts
Discussion Starter · #3 ·
Did you mean you got 960x540 working in full screen mode or squeezed ???


I have just got 720x480 working in full screen mode. Still have the problem of the pulsing text/icons (nor real bad but noticable). There is a slight amount of vertical overscan but horizontal is almost perfect. I am using the RCA transcoder that I had been using on my wide screen Toshiba and it did a good job. At the moment I am just using a cheap set of audio/video cables so I will pick up a good set of component cables this afternoon and see if that helps.


I'll let you know the results. Also if any one has any idea on the pulsing on the text/icons (they seem to grow/shring very slightly at regular intervals of less than a second).
 

·
Registered
Joined
·
449 Posts
Sorry for the confusion: my 960x540p is squeezed.


You can only get 960x540p working in squeezed mode (it automatcially squeezes at 33.75).


btw, I had the same "pulsing" problem that you describe when I tried this before at 640x480 (using the AA transcoder).

Funny, but i couldn't get the picture to synch all all when running at 640x480p with the KD-VTCA2. That's why i tried the 640x400 resolution... I am sure with some tweaking, it can be done.


Personally, I wanted the squeezed mode as all of the stuff I'm watching on my HTPC is 16x9 anyway (except for barney and hey, my kid will just have to suffer with a 4x3 window in the 16x9 image :) ). For whatever reason, the full screen modes just don't seem to come out properly for one reason or another, 960x540p just works better for me.


BTW - I saw a lot of posts complaining about the pulsing text/icons on this display... some even said that they found a way to fix it by tweaking the timings. Try doing a search in the forum to find them...


Jeff
 

·
Registered
Joined
·
2,404 Posts
Quote:
Originally posted by DCypher
Sorry for the confusion: my 960x540p is squeezed.


You can only get 960x540p working in squeezed mode (it automatcially squeezes at 33.75).


Jeff
Now I am confused,


You mean 960x540p is automatically squeesed to 4.3 ratio at 33.75? :confused:
 

·
Registered
Joined
·
449 Posts
ahhhh :)


No, the Panasonic CT-32HX40 has an auto squeeze mode that squeezes the image down to 16:9 when it is at 33.75. This allows you to view 16x9 content of anamorphic dvds at full resolution (the TV puts in the black bars, NOT the dvd).


Hope this clears it up...


Jeff
 

·
Registered
Joined
·
438 Posts
After lots of experimentation, I get a very good 640x480p image on my CT-32HX41 using the following timing details via Powerstrip 3.18:


HFP=71 HSW=24 HBP=97 kHz=31.400 VFP=4 VSW=13 VBP=27 Hz=59.924


As expected there is about 5-6% overscan (on the Win XP desktop this means about 2/3 of both the Recycle Bin icon and the Taskbar are cut off from) but it avoids both the "shimmering" text you describe and the automatic squeeze you get at 540p on this TV. I'm using 8500 AIW with the new drivers and AA transcoder.


FWIW, two lessons I've learned so far (probably already posted by others, but missed by me):


1. Keep pen and paper handy while performing Powerstrip "experiments" -- this helps avoid making the same mistakes over and over again (and allowed me to make lots of novel ones instead).


2. If possible, arrange your cables so you can connect/disconnect both the monitor and HDTV from a point where you can also see them both. Originally, I had to keep walking behind the A/V cabinet to exchange cables whenever a new resolution failed on the HDTV, then walk to the front to work on the monitor, walk to the back to exchange cables, walk to the front to check the TV, etc. An extension VGA cable that let me change displays without moving sped up the trial-and-error process immeasurably. Maybe an HD15 A/B box would be an even more elegant solution (but I already owned the cable).
 

·
Registered
Joined
·
449 Posts
Great!


I'll have to try your 640x480 timings out...


BTW,

I had a lot of success last night in getting many custom resolutions working on my CT-32HX40.

I now have:

640x400p,

640x480p,

848x480p (at 540p timings) (or something close to that, i forget exactly but there's virutally NO overscan and looks great),

1440x480p (540p timings),

960x540p


1440x480p looks great for DVD playback, but so does the 848x480 and this one looks great for a normal windows desktop, so it's my default now.


I was having soooo many problems getting any resoutions to work (other than 960x540) until i switched transcoders! I am now using a KD-VTCA2 with "special synch" enabled (dip switch 4) -- that was the kicker for me! All of a sudden i could get many more resolutions to synch properly!


Hope this helps... let me know if you want any of my timings...


Jeff
 

·
Registered
Joined
·
438 Posts
Maybe what I really need is your transcoder, but I'd like to try your successful settings -- so if you could post those, please.
 

·
Registered
Joined
·
449 Posts
Here are my custom resolutions (NOTE: I have not taken the time to tweak all of them for best results!):


960x540=960,16,32,96,540,2,6,15,37293,1

640x480=640,0,64,96,480,2,31,12,25159,342

640x400=640,56,96,0,400,50,2,73,24890,336

1440x540=1440,92,144,116,540,2,11,10,60202,336

848x480=848,21,80,115,480,1,5,77,35954,342

856x484=856,49,72,79,484,30,1,48,35678,336

720x480=720,52,64,76,480,33,1,49,30807,336

1440x480=1440,125,144,91,480,28,10,45,60340,1


640x480 (480 timings) is good for 4:3 movies

1440x480 (540 timings) seems best for 16:9 movies

856x484 or 720x480 (540 timings for both) seem good for surfing, chatting, email etc.... virtually no overscan.


I don't really use the other resolutions.


let me know if you find an even BETTER one :)

Hope this helps,

Jeff

Jeff
 

·
Registered
Joined
·
438 Posts
Discussion Starter · #12 ·
eggz I couldn't get your settings to work in Powerstrip... I could get close to your exact settings but still had the shimmering text. DCypher do your 640x480 settings still have the shimmering/pulsing text ???
 

·
Registered
Joined
·
438 Posts
Discussion Starter · #14 ·
Jeff,

Couldn't get any of your settings to work with my Nvidia card and RCA transcoder. I'll put the ATI card back in next week and try again with that. It seems that the RCA transcoder is working as I am getting sync for the most part.
 

·
Registered
Joined
·
449 Posts
Yeah, results may vary according to your hardware... I recommend the ATI Radeon cards (7000, 7200, 7500, 8500) and a good transcoder (not that the RCA isn't a "good" transcoder, but many on this forum seem to imply that the only ones worth considering are the Audio Authority and the Key Digital one's).


I switched transcoders from the Audio Authority to the Key Digital b/c i couldn't get anything working well with the AA - but i was also VERY new to this stuff at the time and may have been screwing up stuff! I got this stuff working by taking my time to read Karnis' posts and others!


Anyway, let me know if i can help you out with anything...

Jeff
 

·
Registered
Joined
·
438 Posts
Discussion Starter · #18 ·
I am know begining to think the transcoder could be the problem. Although I had excellent results with the RCA unit on my Toshiba big screen I was pushing everything out at at 540P or 1080i and I think that is where the problem lies. I was unable to get any of Jeffs settings to work on either the Radeon 7500 or the Nvidia card with the TV. I can get a picture to sync at 640x480 but it is has the pulsing and shimmering text.


Just ordered one of the ATI transcoders I'll try it with the Radeon 7500 (although they say for the 8500 only.. If it doesn't work I'll pick ap an 8500. Anyone know the best price on the 8500.
 

·
Registered
Joined
·
449 Posts
The problem with the ATI solution is that you will be limited to 480p on Macrovision encoded dvds. I personally thought my money was better spent on a good transcoder and the cheaper video card (i'm not a gamer).


Jeff
 

·
Registered
Joined
·
438 Posts
Discussion Starter · #20 ·
I hear you Jeff.. I don't use this TV set up to watch DVD's very much as I have a full HT room with a 56" Toshiba wide screen. This is just for the family room and used to watch regular TV and also want to use as a Music/Media server. What do you think of the Radeon 8500 DV all in one. I am going to start a new thread and see if I can get some clarification on this piece I copied from ATI's FAQ.


Q11: What does ATI mean when they say that the RADEON 8500 is "HDTV ready"? What can a user do with the RADEON 8500 HDTV decode capability?



A11: RADEON 8500 is capable of decoding all of the HDTV formats with reduced CPU utilization and of directly driving both analog and digital high definition displays. RADEON 8500 achieves its decode capability through motion compensation and iDCT and without the need for any external hardware. When RADEON is used with the appropriate DTV tuner and DTV demodulator software, the user is able to view HDTV on their monitor or TV.
 
1 - 20 of 21 Posts
Status
Not open for further replies.
Top