Ossc on a HD CRT

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  • #25703
    crimkat
    Participant

    I’m doing a bit of an experiment with my set up.
    I have a HD Crt (Sony Trinitron kv-32hs420) which includes 3 av, 2 component and 1 hdmi input. The hdmi input does support 480p through HDMI (I have a gamecube hooked up through the gchd mk-II displaying fine on it). However, I don’t seem to get any image on my HD CRT. I have the OSSC 1.6 updated to the latest version. I messed with the settings, and when I switch output to DVI mode, I got the boot up screen but in all green. Hdmi mode, nothing.

    I understand that hdmi compatibility is not guaranteed, especially considering this is an HD CRT. However, I am stubborn and I want to get this to work. Is there anything I can do? I’ve thought about running it through a hdmi->vga adapter, then back through another adapter to either hdmi or component (a little ridiculous I know but I’m getting desperate) any and all help is appreciated!

    #25705
    nmalinoski
    Participant

    What consoles are you using through the OSSC?

    #25708
    crimkat
    Participant

    SNES – w/ HD Retrovision Component Cables
    PS2 – w/ HD Retrovision Component Cables
    GameCube – w/ Wii Component Cables routed through GCHD MK-II
    Dreamcast – w/ Native VGA Input

    I’ve tested all consoles. They all work normally with my 4k Flat Screen TV (Vizio m43-c1) minus some sound issues with the SNES, although I’m using an audio switcher to get around that.

    I think it might have something to do with the fact that the HDMI output on the OSSC does not support analogue inputs… Although, my HD CRT has an HDMI input, so can that still be analogue?

    When messing with the settings and changing the output settings to DVI and also powering on the consoles, I do see the game screen as well, just all in green. It’s just odd that I can get an image that way but not by just setting it to HDMI mode.

    Edit: I have ordered a HDMI to Analogue Component adapter, so I am going to give that shot. Hopefully that works well, although I’d still love to get it working with the TV’s native HDMI input.

    #25715
    nmalinoski
    Participant

    I think it might have something to do with the fact that the HDMI output on the OSSC does not support analogue inputs… Although, my HD CRT has an HDMI input, so can that still be analogue?

    This doesn’t really make sense to me. HDMI is entirely digital; what the OSSC does is it takes analogue signals and digitizes them so they can be transmitted digitally.

    Consoles like the Dreamcast and PS2 (and probably the GameCube) should be new enough that they have a stable, standard framerate, but it’s entirely possible that the HDMI processing on your CRT isn’t tolerant of non-60Hz sources, or the HDMI input or the circuitry might be faulty.

    #25719
    crimkat
    Participant

    Yeah it didn’t make much sense either. I don’t think the circuitry in the OSSC is an issue, as it works fine with my 4k TV. The hdmi input on my crt does work, I’ve used it with the gamecube gchd mk-II, and that’s worked fine. That’s also how I know it supports 480p through hdmi.

    I’m guessing it is the TV struggling with nonstandard hz. Is there any way to get around that?

    #25721
    crimkat
    Participant

    DVI mode on HD CRT

    HDMI Mode HD CRT

    For clarification, attached are pictures of the ossc hooked to my HD Crt. The green screen is when it’s on DVI mode, the blank is on hdmi. Keeping in mind that I’m using an hdmi Cable for both settings with no adapters at the moment. It’s very odd. If it was a framerate issue, it wouldnt be giving me an image at all on DVI mode. So I think I can conclude it isn’t the source. But for some reason, my HD CRT is rejecting the OSSC in HDMI mode.

    https://ibb.co/rwf7fv5
    https://ibb.co/TPKNV29

    #25725
    marqs
    Participant

    The green screens indicates the TV might try to process input as YCbCr. Can you hook up PC to the screen and extract its EDID?

    #26169
    jakdup5
    Participant

    Have u tried switching to 256 or 320 optimal? I need to for my vga monitor

    #26232
    incrediblehark
    Participant

    I know this is going to sound like one of those generic troubleshooting answers, but have you tried plugging/unplugging the hdmi cable or turning on/off the tv while the ossc and game console are on? It may be sort of a handshake issue with hdmi input on the tv and the ossc. Sounds similar to issues people have had in the past with older tvs and hdmi using devices like cable boxes, etc. There are a few topics in different av forums on the internet describing a similar issue to yours.

    Either way I hope you are able to solve it, I haven’t seen a lot of people talking about using the ossc on an hd crt and am curious to see pics of how the image looks, and how the input lag is.

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