HDMI CRT TV 480p stretching

[maxine64]

My TV is Philips 32PW8422 HD CRT. I own an AMD GPU and have my TV connected via HDMI. Been trying to use CRU to find a solution.

CRT HD TVs via HDMI are really finnicky about what resolutions they allow, apparently they are limited to the firmware of the TV to only accept certain entries. My resolutions seem to be limited to the TV Resolutions' Data block.

By default my TV offers 720x480 which is 3:2 and not 16:9 but my TV Stretches it to 16:9 or to 4:3 (depending on the options I've selected).

I've been struggling to set any custom resolutions. Tried to add 853x480 in many different ways to no avail, only way I could get my TV to read it was by adding it as a detailed resolution but then the TV would be set at 1080i, and if I tried to delete the 1080i resolution and set 480p as Window's native res(which would be quite tedious to do so every single time), but then it wouldn't run at all. So I'm either looking for a 853x480 desktop to be stretched down in a 720x480 image (which is what I assume consoles like the Wii or PS3 would do for TVs like these), this would be the ideal solution.

Or, to get 720x480 to be centered in my TV (without having to enter every single time at the Service mode), with pillarboxes. Which I DID at one point, but accidentally and now I can't get to replicate it.

[ToastyX]

This is tricky because AMD's GPU scaling will only scale up, not down, and I don't know what timings that TV will accept. You should be able to center 720x480 within a higher resolution by setting GPU scaling to center in AMD's control panel.

You might be able to trick the TV into accepting a custom resolution if the totals and pixel clock match a supported resolution. There is a 1440x480p resolution intended for TVs that might work:
   

852x480 based on that (even numbers might work better):
   

[maxine64]

(12-11-2023 04:39 AM)ToastyX Wrote:  This is tricky because AMD's GPU scaling will only scale up, not down, and I don't know what timings that TV will accept. You should be able to center 720x480 within a higher resolution by setting GPU scaling to center in AMD's control panel.

You might be able to trick the TV into accepting a custom resolution if the totals and pixel clock match a supported resolution. There is a 1440x480p resolution intended for TVs that might work:


852x480 based on that (even numbers might work better):

That worked! Had to setup AMD's panel to "Full panel" stretch for 852x480 (on 1440x480) to work, thanks a lot!!!

[maxine64]

(12-11-2023 04:39 AM)ToastyX Wrote:  This is tricky because AMD's GPU scaling will only scale up, not down, and I don't know what timings that TV will accept. You should be able to center 720x480 within a higher resolution by setting GPU scaling to center in AMD's control panel.

You might be able to trick the TV into accepting a custom resolution if the totals and pixel clock match a supported resolution. There is a 1440x480p resolution intended for TVs that might work:


852x480 based on that (even numbers might work better):

What timings could I use for my tv to take in 1440x240 or 2880x240?

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(12-18-2023 05:18 PM)maxine64 Wrote:  

(12-11-2023 04:39 AM)ToastyX Wrote:  This is tricky because AMD's GPU scaling will only scale up, not down, and I don't know what timings that TV will accept. You should be able to center 720x480 within a higher resolution by setting GPU scaling to center in AMD's control panel.

You might be able to trick the TV into accepting a custom resolution if the totals and pixel clock match a supported resolution. There is a 1440x480p resolution intended for TVs that might work:


852x480 based on that (even numbers might work better):

What timings could I use for my tv to take in 1440x240 or 2880x240?

So I did try the "CEA-861" timings on Video Timings Calculator, and 2880x240 wouldn't work (black screen) and 1440x240 (had to remove 1440x480 resolution) would freeze the screen upon switching.