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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap: break-word;-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Sorry David Brunch blanking is not part of 8 field PAL it’s a four field sequence<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>and is part of the original PAL spec<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It’s now widely believed that it was unnecessary removal of some of the</span><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> colour</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> burst in the vertical interval and was only implemented because Dr Bruch had a faulty TV at the time when he developed the system<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It’s now locked in because it’s the easy way to identify the four field sequence<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> field 3 where the first</span><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> colour</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> burst is nearer to the vertical interval than anywhere else so you can detect field three with a simple monostable fired from field sync<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>So we cannot remove it<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>RCA forgot to add it to the TK76 camera and some machines would not lock to TK76 cameras because of this<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>So the internal SPG chip grew external components to add it <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>TrevorB<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>UK member<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> quadlist-bounces@quadvideotapegroup.com [mailto:quadlist-bounces@quadvideotapegroup.com] <b>On Behalf Of </b>David Crosthwait<br><b>Sent:</b> 09 March 2011 16:39<br><b>To:</b> Quad List<br><b>Subject:</b> Re: [QuadList] [Quad List] Question of the week-RCA AE 6000 editor/TEP<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Trevor and Tony,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I had always heard of the "8 field Bruch Sequence" and later on in life in linear edit bays operating in 625 PAL here in the U.S, dealt with long pre-rolls and the PAL color framing issues. This was particularly gruesome with PAL 1" type B and C edits. "Bruch" refers to <span class=apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>Doctor Eng. Walter Bruch of Telefunken labs who invented the PAL system in 1965. Did either of you ever meet Dr. Bruch? He passed away over two decades ago.</span></span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://www.flickr.com/photos/12064036@N04/4050912252/">http://www.flickr.com/photos/12064036@N04/4050912252/</a><o:p></o:p></p></div><div><p class=MsoNormal>Which leads to this:<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://www.radiomuseum.org/forum/45_years_anniversary_of_walter_bruchs_pal_color_television.html">http://www.radiomuseum.org/forum/45_years_anniversary_of_walter_bruchs_pal_color_television.html</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>David<o:p></o:p></p></div><div><p class=MsoNormal><a href="http://www.dcvideo.com">www.dcvideo.com</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Mar 8, 2011, at 1:31 PM, Tony Quinn wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><p class=MsoNormal>In message <003101cbddd6$f30f09e0$d92d1da0$@com>, Trevor Brown <<a href="mailto:videovault@sky.com">videovault@sky.com</a>> writes<br><br><o:p></o:p></p><p class=MsoNormal>Tony I bow to your mathematics it’s a long time ago<o:p></o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Was it not 1/4 cycle of subcarrier ? 4.43361875 Mhz<o:p></o:p></p></blockquote><p class=MsoNormal><br>Half a cycle ... It resulted in Colortec going (effectively) from one end to the other)<br><br><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>It’s a small picture jump that you get away with on cuts<o:p></o:p></p></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>110 or 112.7 its equally annoying<o:p></o:p></p></blockquote><p class=MsoNormal><br>Only on invisibles, if there's as change of picture content it becomes )to all intents and purposes) invisible<br><br><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>Colortec ??? CATC :-(<o:p></o:p></p></blockquote><p class=MsoNormal><br>Yes - but I have very limited experience of RCA kit - VT24 was about my limit - I would never, due to grades at the time, have been allowed into Suite 2 (Rip. Scratch, and all that)<br>-- <br>If one person has delusions, we call them psychotic. If, however, 1.5 billion<br>people have delusions we must apparently call them a religious group, and<br>respect their delusionary state.<br><br>_______________________________________________<br>Please trim posts to relevant info when replying!<br>Send QuadList list posts to <a href="mailto:QuadList@quadvideotapegroup.com">QuadList@quadvideotapegroup.com</a><br>Your subscribe, unsubscribe and digest options are here:<br><a href="http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com">http://mail.quadvideotapegroup.com/mailman/listinfo/quadlist_quadvideotapegroup.com</a><o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></div></body></html>