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 | | PALplus broadcasts must carry this WSS line, which will tell the TV not only if PALplus processing is to be done, but also whether the signal is "Film Mode" or "Camera Mode". |
 | | PALplus is defined as being Letterbox 16:9 Centre, Camera Mode or Film Mode, Helper present, "ColourPlus" Clean PAL used. |
 | | In addition, during a PALplus transmission, the last 21uS (appx) of line 23 is used to carry a reference signal consisting of 10uS of fl level followed by a burst of 48 cycles of -U phase subcarrier (used to fine-trim the phase and gain of the helper-line demodulator). |
| www.europeantv.com.au /palplus1.html (4802 words) |
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