[fapjacks]

I'm going to guess it was one of the many foreign language channels. In that area of the country, the vast vast majority of over-the-air broadcasts are not in English (think Korean soap operas). When grapeshot described it, I was thinking one of the Vietnamese or Turkish soap operas being piped from Youtube directly into a transmitter and broadcast across southern California. I'm interested to know which station, too!

[grapeshot]

It was the second channel on a multiplex owned by a church, normally it's showing educational programs for kids.

[enzanki_ars]

That was my guess too, but I have seen some local syndicates for NBC/ABC/CBS/FOX etc. that have some low quality productions. It wouldn't even surprise me if some of those use a similar technique.