Is there a product out there that hooks up to an antenna, and decodes an HDTV signal to S-Video, Composite, or Component? If it had an optical output or a regular RCA stereo output would be a must too. It does not need to drive speakers.

The aspect ratio error isn't a problem, I'm able to correct for that.

Yes, there are tons of them.

of Satellite Receivers will do the same thing.

My Sony HDTV receiver will do what you are asking

Check out this Samsung model for just OTA<ul><li><a href="http://www.samsung.com/Products/DigitalSetTopBox/DigitalTerrestrialReceiver/DigitalSetTopBox_DigitalTerrestrialReceiver_SIRT35 1.htm">Samsung Digital Set Top Box</a></li></ul>