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This topic comprises 7 pages: 1 2 3 4 5 6 7
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Topic: New DVD and BluRay
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Leo Enticknap
Film God

Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 06-20-2012 07:48 AM
quote: Bobby Henderson
Likewise, Blu-ray image quality is clearly superior to DVD. If there really was no visible difference between Blu-ray and DVD there would be no need for HDTV at all since standard definition would be "good enough" for the forseeable future. If 6 times the pixel count means nothing then all the digital projection conversions going on in commercial theaters could have been completed using mere standard definition resolution imaging chips. No need to jettison the first generation of d-cinema projectors with 1280 X 1024 resolution DLP chips. If resolution means nothing movie theaters should have gone the way of video 30 years ago!
Resolution isn't the only factor: bitrate (the volume of data used to represent the image and sound within a given time period), the source materials used to master the DVD or BD, and the mastering process itself also affect the subjective perceived viewing and listening experience for the end user.
I've seen cheaper, single layer BDs with bitrates down into the low teens of mbps (megabits per second). That's only a little higher than the theoretical maximum of a DVD, which is 10.08. Of course DVDs vary, too: longer films often drop down into the 3-5 range, which is needed if you're going to fit three hours onto an 8.4gb disc. As a general rule, it's the high quality DVDs with bitrates that are consistently in the 7-9 range that can look very good indeed when uprezzed, leading some to opine that there is little subjective quality difference between DVDs and BDs.
If your low bitrate BD is also transferred from a release print rather than a specially graded IP or IN (high contrast and so not much detail in the midtones), then you're not going to see much of an improvement over a professionally done DVD, either. But a BD scanned from a specially graded element, on a high end machine, by someone who knows what he or she is doing, and then encoded in H.264 with bitrates that are consistently in the high 30s (the theoretical maximum for a BD is 48mpbs) is a totally different animal.
So all other factors being equal, there is a lot more video and audio information in a BD than in a DVD, and you'll see that on the screen if your equipment is set up correctly. But those other factors very rarely are equal in practice, which makes the comparison a subjective and difficult one.
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Claude S. Ayakawa
Film God

Posts: 2738
From: Waipahu, Hawaii, USA
Registered: Aug 2002
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posted 06-20-2012 12:20 PM
Yes, it''s a 32 iinch Panasonic, but you have not said if it is a standard or a high definition set, Robert. About three years ago, there were several discs I wanted very baldly but they were exclusive to Blu Ray so I bought them along with a BD player and watched them on a SD set and could hardly see the difference in picture quality. After buyiing many more BDs and watching them on my SD set, I eventually purchased a 1080p Samsung HDTV set and I was was totally amazed at the difference in the picture quality. In HD, the picture was just like I was watching an actual film at a theatre. I never felt this way when I watched Beta, VHS, Laserdiscs and DVDs on a standard television set.
If your set is indeed HD, it could very be 720p instead of the full 1080p maximum standard of HDTV and there is a difference in picture quality between the two. From what I had seen , good DVDs can look almost as good as a BD in 720p but the difference is very apparent on a 1080p set. At least to my 72 year pair of eyes it does.
-Claude
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