Reply To: Questions about PS2 Optimal Timings

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April 7, 2021 at 6:49 PM #46530
Zacabeb
Participant

    1) PS2 games generally run in the same resolution regardless of whether they render to 4:3 or 16:9. The best option is to use the same timings and force the display to stretch the picture to 16:9.

    If that can’t be done, you need to use the Generic 4:3 mode and increase all the horizontal values by 4÷3 to generate an oversampled picture that natively displays as 16:9. That would mean the following values:

    H.samplerate 1144
    H.active 960
    H.synclen 83 (approximately)
    H.backporch 76 (approxmiately)

    The resulting signal may or may not be accepted by the display.

    2) Regarding the 4:3 aspect ratio, the standard definition pixel clock of the PS2 was based on a 4x multiple of the ITU-R BT.601 sample rate, resulting in a picture that was a bit narrower than 4:3 given a full 480 line tall picture. Because of its integer scaling, the OSSC also can’t fully compensate the aspect ratio for all resolutions and output modes below 4x.

    3) The PS2 had a very high video bandwidth for YPbPr/RGB component across all its revisions (as far as I know). That means you can get a very sharp picture in 4x bob mode with Allow upsample2x enabled, so long as the game itself doesn’t do any softening, reducing the need to use optimized modes unless you need to reduce jitter or other artifacts.