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 Posted: Mon, 2nd Mar 2009 16:29 Post subject: Question about HDTV releases (not BluRay) |
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From time to time, HDTV rips of movies that are not available on BluRay appear on usenet. Does someone here know how TV stations get their early HD material? Do movie studios provide them with real 1080p transfers or do they upscale regular PAL/NTSC copies by themselves?
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nouseforaname
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Location: Toronto, Canada
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| Posted: Mon, 2nd Mar 2009 16:50 Post subject: |
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I'd llke to know as well.
I know one limitation of HDTV is that the source bitrate is lower than BluRay (max ~20 vs. max 54).
asus z170-A || core i5-6600K || geforce gtx 970 4gb || 16gb ddr4 ram || win10 || 1080p led samsung 27"
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| Posted: Mon, 2nd Mar 2009 17:00 Post subject: |
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they are real HD, but usually not cleaned up like the bluray releases.
Also the bitrate is limited over cable/sat, for example often stereo sound is used or if there is AC3 5.1 sound its at a low bitrate of 340ish KB/s , for comparison, DVD is usually 448kb/s, bluray is 640kb/s, DTS is respectivly 700ish/1500ish on DVD/bluray.
Positive side is often releasegroups will get if needed superior soundtrack from DVD ( for example the finding nemo 720 release has DTS track from DVD )
The picture quality usually is more than decent even compared to bluray 720p rips, i never regretted getting a HDTV rip over a DVD rip but once, and that was with the HDTV rip of Platoon ( horrible 1080i rip converted to 720p ).
And to your actual question, the movie studios provide it, they are huge tapes unlike anything the consumer market uses, i cant provide specifics but thats where all the data goes to after which the source is digitally scanned.
Usually they are scanned from an old master or even a copy of it ( analog print), which is good enough for DVD, but might show its age when shown at higher resolutions.
a good example is the starwars episode 1 HDTV release, while superior to DVD you can clearly see the dust specs , and its an old print so it looks a bit more blurry than you might be used to.
For bluray itself there is alot more effort to clean up the print, which is almost always the precious master print, not to mention a way superior lossless audio track.
i hope that sort of answers your questions
I advice to check out the following forum if you have any more, http://www.blu-ray.com/, there is a subforum where you can ask questions to people who do the the actual bluray producing etc.
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| Posted: Mon, 2nd Mar 2009 17:14 Post subject: |
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ThOMaZ
Posts: 809
Location: Here
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| Posted: Mon, 2nd Mar 2009 18:52 Post subject: |
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Thank you. That was an intresting read 
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SuTuRa
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deelix
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nouseforaname
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| Posted: Tue, 3rd Mar 2009 17:21 Post subject: |
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| Posted: Tue, 3rd Mar 2009 17:59 Post subject: |
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Wow, never heard of that.
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LeoNatan
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| Posted: Wed, 4th Mar 2009 01:00 Post subject: |
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In fact, some of the d-theatre tapes (and subsequently, the rips) were better then some early blurays.
I miss the old days of HDTV rips, the search for better quality, etc...  Now it's all too simple again, like DVDs. 
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| Posted: Wed, 4th Mar 2009 02:25 Post subject: |
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| iNatan wrote: | | In fact, some of the d-theatre tapes (and subsequently, the rips) were better then some early blurays. |
I guess you mean the early MPEG2 BluRays? Yeah, that was a funny fuckup.
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LeoNatan
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| Posted: Wed, 4th Mar 2009 03:43 Post subject: |
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MPEG2 has nothing to do with it. Kingdom of Heaven DC on bluray was MPEG2, 40GB of it in fact, and is to this day, one of the best looking bluray titles available. MPEG2 just means you need much larger space requirements for comparable to AVC/VC1 quality.
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