Who invented PAL?

[Robert Grant]

I have read elsewhere (cannot remember where now) that Sony PAL was different from either Telefunken PAL or PAL simple.
Specifically, I read that Sony PAL did use a delay line. The delay line stored the color information of every other line (the lines in which R-Y and B-Y were transmitted). During the other lines (in which Y-R and B-Y were transmitted), the delay line output (a copy of the previous line) was fed to the color matrix, with each Y-R line effectively being discarded. The result behaved very much like NTSC-B, thus, Sony PAL sets had the "hue" knob familiar on the other side of the Atlantic.

Is this incorrect?

While we are on the subject of European analog TV history, what is really the difference between system B and System G?

System G supposedly uses an 8 MHz channel, versus 7 MHz for System B. This could imply that some video information would continue above the audio carrier to make the horizontal resolution better (with the quirk of a "gray zone" where the audio carrier would block some details).

However, the visual bandwidth for System G is also quoted as 5.2 MHz, so there would be nothing above the audio carrier (before the unrelated and unforseen addition of Zweiton many years later).

Another question relates to the UK system of a 6 MHz audio offset. 5.5 would have been System B/G, and compatible with much of NATO Europe (the whole reason for abandoning 405?), where as 6.5 MHz (as used by OIRT members) would have given the full resolution of the 8 MHz UHF channels. With 6.0, they got neither!