<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div>Thanks, Ted. Nice summation.</div><div><br></div>Junaid told me the noise reducer was their first Accom product and he wrote the software.<div><br></div><div><span style="color: rgb(255, 255, 255); font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11px; background-color: rgb(0, 0, 0);">Accom’s first product to be introduced was the “DIE-422” — a Digital Image Enhancer. This machine was used in the film-to-tape transfer process, electronically removing film dirt and scratches, as well as providing overall image enhancement capabilities.</span><br><div><br></div><div>Just to help understanding, I think I would use the word "contouring" and not banding to describe the bands in a image with 8-bit video, especially when talking about Quad video. . Our video stays 10-bit all the way from the analog input to the digital MOV file. </div><div><br></div><div>Quantel developed "Dynamic Rounding" to make 8 bits look as good as 10.</div><div><br></div><div><b style="color: rgb(37, 37, 37); font-family: sans-serif; font-size: 14px; line-height: 22px; background-color: rgb(255, 255, 255);">Dynamic Rounding</b><span style="color: rgb(37, 37, 37); font-family: sans-serif; font-size: 14px; line-height: 22px; background-color: rgb(255, 255, 255);"> - Dynamic Rounding is a technique devised by Quantel for truncating the word length of pixels – a process you can't avoid when you are processing images. Rather than simply losing the lower bits, Dynamic Rounding uses their information to control, via a randomiser, the dither of the LSB of the truncated result. This effectively removes any artefacts that would otherwise be visible. Dynamic rounding is non-cumulative on any number of passes and produces statistically correct results. Dynamic rounding eliminates any truncation artefacts.</span></div><div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div><div>It is also used on images that were created on their boxes, like in a Paintbox image. </div><div><br></div><div>We have some Quantel equipment (Editbox, Paintbox, Hal) and Dynamic Rounding really works.</div><div><br></div><div>One feature of the D-Bridge is to take in digital D-2 and convert it to digital D-1 (digital composite to digital component), keeping it digital all the way.</div><div><br class="Apple-interchange-newline">Best,</div><div>Park</div><div><br></div></div><div>C. Park Seward</div><div>Cell: 818-535-2747</div><div>Home: 541-476-6657</div><div>2" Quad and 1" "C" transfers and more</div><div>The Transfer Lab at Video Park</div><div>Visit us: <a href="http://www.videopark.com">http://www.videopark.com</a></div></span></div></span></div></span></span><br class="Apple-interchange-newline"></div></span></div></span></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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<br><div><div>On May 17, 2014, at 9:33 PM, Ted Langdell <<a href="mailto:ted@quadvideotapegroup.com">ted@quadvideotapegroup.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><br><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On May 17, 2014, at 7:17 PM, <a href="mailto:couryhouse@aol.com">couryhouse@aol.com</a> wrote:</div><div id="role_body" bottommargin="7" leftmargin="7" rightmargin="7" topmargin="7" style=""><font id="role_document"><blockquote type="cite">I just bring it into digital and hit the save a still in Sony Vegas... or if I am watching analog footage in windows media player I do a screen capture..... </blockquote></font></div></div><div><br></div>I think what Park meant by "capture an image" was "digitize video" not make a still.<div><div><br></div><div>His particular process converts composite video to component using the Accom D-Bridge 10-bit decoder before capture as a file... say as 10-bit YUV 4:2:2 in a Quicktime wrapper.</div><div><br></div><div>The D-Bridge products (122 and 221) have roots in companies formed by former Ampex engineers:</div></div><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><a href="http://www.abekas.com/main/history//page1059.htm">http://www.abekas.com/main/history//page1059.htm</a></div><div><br></div><div>They were intended to "Bridge" the analog to digital process, including analog composite, D1 parallel and D2 composite.</div><div><br></div></blockquote><div><div>In a message dated 5/17/2014 4:52:15 P.M. Mountain Standard Time, <a href="mailto:park@videopark.com">park@videopark.com</a> writes:<br><div id="role_body" bottommargin="7" leftmargin="7" rightmargin="7" topmargin="7" style=""><font id="role_document"><font style="background-color: transparent; "><blockquote type="cite">This is a low band color image from the late 60s, taken with a TK-42. Notice the lack of banding, hanging dots and cross-color contamination.</blockquote></font></font></div></div><div><br></div><div>The word "banding" can mean two things as related to this post: </div><div><br></div></div><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><div>Quad banding... where one sees variations every 16 lines (NTSC) caused by differences in reproduction by each head (EQ, luma, chroma levels for example.)</div><div><br></div><div>Or noticeable bands in light to dark areas of the picture caused by the number of bits used in the digitization process. </div><div><br></div><div>You might see this on say a cyc wall where the top is darker than the bottom. Skies are also an example of where banding might easily occur. </div><div><br></div><div>An 8-bit digitization step (255 steps per color) might be more likely to cause a noticeable bands of luma or chroma. 10-bit digitization provides 1023 steps per color, so banding is less likely to occur.</div><div><br></div><div>Here's Larry Jordan's take on it with a visual example (originally written in 2007 when ProRes was released):</div><div><a href="http://www.larryjordan.biz/why-video-bit-depth-matters/">http://www.larryjordan.biz/why-video-bit-depth-matters/</a></div><div><br></div></blockquote>More bits and a better representation of the original analog signal is one reason why the generally preferred Archival file for SD is 10-bit YUV 4:2:2, and in a Quicktime wrapper, although some archives use AVI if they're PC based.<br><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><br></blockquote><div><div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="font-size: inherit; line-height: normal;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; 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font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px; font-size: inherit;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="font-size: 17px; "><font class="Apple-style-span" size="3" style="font-size: 17px; "><span class="Apple-style-span" style="font-size: 15px; ">Ted</span></font></div><div style="font-size: 14px; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; "><br></span></font></div><div style="font-size: 14px; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Ted Langdell</span></font></div><div style="font-size: 14px; "><span class="Apple-style-span" style="font-size: 12px; ">Secretary</span></div><div style="font-size: 14px; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">Skype: <span class="Apple-tab-span" style="white-space: pre; "> </span>TedLangdell</span></font></div><div style="font-size: 14px; "><font class="Apple-style-span" size="3"><span class="Apple-style-span" style="font-size: 12px; ">e-mail:<span class="Apple-tab-span" style="white-space: pre; "> </span><a href="mailto:ted@quadvideotapegroup.com">ted@quadvideotapegroup.com</a></span></font></div><div style="font-size: 14px; "><font class="Apple-style-span" size="3"><br></font></div></span></div></span></div></span></span></div></div></div></span></div></span></div></span></div></span></div></span></div></div></div></div></span></div></div><div style="font-size: inherit; line-height: normal;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; letter-spacing: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; border-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-stroke-width: 0px;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="font-size: inherit; line-height: normal; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div style="font-size: inherit;"><div><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; line-height: 19px; "><font class="Apple-style-span" size="3"><div style="margin: 0px; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-family: Helvetica;"><b>Seventh Annual Quad Videotape Group Dinner at AMIA: 7pm, Tuesday, October 7. 2014, Savannah, Georgia</b></div><div style="margin: 0px; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: normal; font-family: Helvetica;"><b>Eighth Annual Quad Videotape Group Lunch at NAB: 12:30pm on Tuesday, April 14, 2015, Las Vegas Convention Center</b></div></font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></span></div></span></div></span></div></div></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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<br></div></div>______________________________________________<br>Please trim posts to relevant info when replying.<br><br>Change subject to reflect thread direction. Thanks.<br>_______________________________________________<br><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></blockquote></div><br></div></div></body></html>