Knowing the protocol wouldn't help much if you don't also know the device number(s).

Normally one looks for "discrete" codes when one already has some ordinary codes for the same device.

If you can get Pronto Hex for any ordinary code for that device, you can use IrTool to decode it. Then you have the protocol, device and if needed subdevice for use with MakeHex.

If you find the IR signals of a related model online in a pcf file or ccf file or jp1 or lirc or (more difficult) other formats, we can figure out the protocol, device, etc. and likely your model uses the same signals.

But I didn't see any Samsung AV-anything in any of the usual places I look for online data on devices.

Can your pocket PC learn IR signals? Or is it output only?