[QuadList] DVD vs Blu-Ray

Mon Dec 23 13:25:45 CST 2013

James,  Right Question, Wrong Group (these guys are way too smart)

Of course the answer is: For compatibility with the existing B&W televisions,
RCA figured out how to cleaverly interleave the sidebands of color information
into the picture, in between the video content harmonics of the 15,750 Hz
horizontal sweep via an odd divisor number in the sync generator that would
count down to create all the syncs.  The B&W compatible results are the
15,734 H and 59.97 V scan rates counted down with vacuum tubes ! from
3.579545 Hz in the "new" NTSC color system.  The better solution was to
count down from 14.31818 MHz. 

Was the tube model RCA sync generator the TG 2 with auxilary Color chassis?

  Thanks!

mike

mike at bolandcom.com
www.bolandcom.com
Pacific-Los Angeles Time Zone
+1 (949) 465-9911 Tel
+1 (949) 465-9944 Fax
______________________________________________________________

On Mon, 23 Dec 2013 13:36:06 -0500, James Snyder 
<snyder at dtvexpress.net> wrote:

> If the label says "NTSC" it means 29.97, not 30fps.  This may seem to 
> be splitting hairs, but for those of us who archive video materials 
> there is a meaningful technical difference between 29.97 fps and 30 
> fps.  There actually is 30 fps material being produced today, and it 
> doesn't always play nicely with 29.97 equipment unless it's slowed 
> down properly. 
>
> PAL and SECAM (and all 576 line digital video) is 25.00 fps, of course. 
>
> Then there is the whole Drop Frame vs. Non-drop frame time code 
> thing.  I can't wait for the day when we no longer need Drop Frame 
> time code. 
>
> Additionally, "YUV" is a misnomer as well.  YUV is the term used for 
> PAL & SECAM variant of YPbPr  component color difference encoding in 
> the ISO international analog television standards.  YIQ was NTSC's 
> term.  YPbPr is the proper terminology for component color difference 
> signals, like those used in MPEG-2 encoded video on DVDs.  Hence, you 
> CANNOT use the term "YUV" when talking about NTSC coded video. Oh, 
> the irony.  However, since "YUV" seems to be easier to use as a term 
> than "YPbPr" to the vendors who write the manuals, software and 
> documentation (and most of those vendors are in former YUV countries) 
> the misuse of YUV terminology continues. 
>
> Trivia question for the group: why does the 29.97 frame rate exist?
>
> James
>
> ------------------------------------------------
> James Snyder
> Senior Systems Administrator
> Library of Congress -
>    National Audio Visual Conservation Center (NAVCC)
> Motion Picture, Broadcasting & Recorded Sound Division (MBRS)
> Packard Campus for Audio Visual Conservation
> http://www.loc.gov/avconservation/packard/
>
>
> >Sometimes the NTSC label simple means 30 fps, and PAL 25fps
> >
> >Robert
> >
> >RMC Media Partnership
> >
> >On Mon, Dec 23, 2013 at 5:24 PM, Steve White 
> ><<mailto:Steve.White at 800callnow.com>Steve.White at 800callnow.com> 
> >wrote:
> >
> >
> >
> >Fred & Tony,
> >
> >Thank you for your replies.  Both are helpful. 
> >
> >I did not have VLC.  Just downloaded it from cnet.  VLC reports:
> >
> >Codec: MPEG-1/2 Video (mpgv)
> >Resolution: 720x480
> >Decoded format: Planar 4:2:0 YUV
> >
> >Which leaves just one question.  Is it technically correct to label 
> >this as an NTSC DVD, or should it be labeled something else?
> >
> >Warm regards,
> >Steve
> >
> >
> >On 12/23/13 12:07 PM, Fred Kovach wrote:
> >
> >>Hi Steve,
> >
> >It prob is 480i anamorphic.  Many bluray players will play whatever 
> >is in them at 1080p. Anamorphic refers to a 16:9 being squeezed into 
> >a 4:3 picture, which is then stretched out to the full 16:9 screen 
> >on the monitor. 
> >
> >That being said, TQ's advice to use VLC is your best between to find 
> >out what format it's in. 
> >
> >Take care,
> >Fred
> >
> >Fred and Crystal Kovach,
> >along with Phillip, Stephen and Hope. 
> >
> >Your missionaries using media technology to reach our world for Jesus!
> >Voice: <tel:417.848.8381>417.848.8381
> >Main Webpage: <http://www.fredcrystal.com/>www.fredcrystal.com
> >Ministry Information: 
> ><http://ministry.fredcrystal.com/>http://ministry.fredcrystal.com
> >
> >Sent from my iPhone
> >
> >On Dec 23, 2013, at 10:53 AM, "Steve White" 
> ><<mailto:Steve.White at 800CallNow.com>Steve.White at 800CallNow.com> 
> >wrote:
> >
> >>Thanks for the opportunity to ask, can someone help me get a better 
> >>grasp of DVD vs Blu-Ray formats?
> >>
> >>I recently received a video disc labeled as an NTSC DVD of the 
> >>Garth Brooks "Blame It All On My Roots" performance in Las Vegas. 
> >>Playback on my Blu-Ray deck displays as full screen on a new 
> >>Panasonic plasma screen capable of 1080p without obvious aspect 
> >>ratio distortions. 
> >>
> >>Garth's performance is incredible; lighting, camera work, audio, 
> >>direction all are great.  Apparently, there is currently no Blu-Ray 
> >>disc available. 
> >>
> >>- Is it technically correct to label the DVD as NTSC when the image 
> >>displayed is 16:9?
> >>
> >>- What's the likely resolution/format?  Any suggestions on how I 
> >>could have confirmed that without asking you?
> >>
> >>Many thanks,
> >>Steve
> >>
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