You can output video from PlayStation format software to a TV in full-screen size.
Video output using an earlier version of the system software:

Video output using system software version 5.00:
Even if you are using a video output cable that does not support video in progressive mode (a cable that supports video in interlace mode only), you can watch video from PlayStation format software in full-screen size on your TV.
Cables that can be used to output video from PlayStation format software
With earlier versions of the system software (pre-5.00):
- Component AV cable (progressive mode)
With system software version 5.00:
- Component AV cable (progressive mode)
- S VIDEO cable (interlace mode)
- AV cable (interlace mode)
Hints
- When playing PSP format software such as UMD games, video content cannot be output in full-screen size or in interlace mode.
- PSP-3000 series systems output video from PlayStation format software in full-screen size by default.