English NTSC TV's.

[NewVista]

First PAL sets used visual averaging of complementary hue errors (if any) over odd & even line pairs with different line in between creating annoying "venetian blind" artifact. Disastrous idea given interlaced scanning.

[old_tv_nut]

Originally Posted by NewVista

First PAL sets used visual averaging of complementary hue errors (if any) over odd & even line pairs with different line in between creating annoying "venetian blind" artifact. Disastrous idea given interlaced scanning.

Because of the location where PAL was invented, this got the nickname "Hannover bars."

[ppppenguin]

AFAIK all UK colour TVs used delays lines and so didn't show Hanover blinds (or bars) unless the decoder was misaligned. The early Sony sets effectively converted PAL to NTSC and so didn't show them either.

The Telefunken PAL patents were administered by EMI in the UK. All the receiver manufacturers paid but EMI didn't both to chase the broadcast equipment manufacturers who made PAL encoders. I think this was a sort of de minimis thing as the numbers of encoders was tiny compared to decoders. Until some time in the early 1980s when EMI were going through one of their many financial panics. I was working at Michael Cox Electronics at the time and EMI threatened the company with royalty payments for all the 1000+ coders that MCE had manufactured since the late 1960s. I don't know how that was resolved.