What is HD?

HDV is a specific defined format (well, two formats, actually). Blu-Ray's capabilities extend far beyond HDV, in that Blu-Ray encompasses AVC, MPEG-2, and VC-1.
 
Barry_Green said:
HDV is a specific defined format (well, two formats, actually). Blu-Ray's capabilities extend far beyond HDV, in that Blu-Ray encompasses AVC, MPEG-2, and VC-1.
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Thanks Barry - left out those formats. Unless I am off, a lot of BlueRay is still MPEG-2 to keep the backward compatibility going. At least that was the case early on in the game. I have a feeling that MPEG2 is still the set for most of the bonus stuff even when it is coded in VC-1 just to save time to port over from the DVD release.
 
Mattykins said:
I have a feeling that MPEG2 is still the set for most of the bonus stuff even when it is coded in VC-1 just to save time to port over from the DVD release.
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Nearly every BD I've seen reviewed in the past year is Mpeg4 or VC-1. Mpeg2 is quickly falling away.
 
Mattykins said:
BlueRay is HDV not true HD. Considering most disks have the MPEG2 compression to allow backward compatibility - the information is still compressed. The major difference is the amount of information that is on the disk. Of course it is an HD frame. But the compression is still there and technically HDV. HDV and HD share aspect ratios, the difference is the compression.

And you record video with BlueRay? Impressive.

Just saying - nearly everything said is all kinds of wrong.
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In the early days of Blu-ray MPEG-2 was used, but today, mostly everything is MPEG-4 H.264 or VC-1 using the higher quality 2 pass compression.

Many movies are mastered using 2K or 4K scans, color correction is applied, and converted to 1080/24p (1920x1080) for recording to the Blu-ray disk. The color space is 4:2:0.


The answer to the question, "What is True HD?", will depend on how one defines, "True HD".

Is 720p True HD?

Is 1080i True HD?

Is any sub-sampling true HD? (1440x1080 or 1280x1080)

Is 4:2:0 True HD?

Is any form of compression True HD?



Bob Diaz
 
Zak Forsman said:
many broadcasters like the discovery channel have specific limitations on how much HDV footage can be used in a program. under 30% i think. this may be the reason why they don't want HDV.
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If your content is good they will take it. The new episodes of Storm Chasers on Discovery was shot all on Sony Z7 cmos hdv camera's. Same with the new Deadliest Catch, older episodes were older Sony Z1's. I have friends that shoot / produce both shows. Disco loves Sony HDV now.
 
Major films never go 4K unless it is for a VFX plate. 2K is the transfer that happens almost all the time. Color space wouldn't exit full raster until the end compression. You wouldn't go color correcting a 4:2:0 color space after the lab transfers the footage. At the least it would get transfered with a 4:2:2 color space. But they would never pop out a 4:2:0 unless it was final compression.

I don't know how "early" you can say 2006 was when Paramount was still using MPEG-2? I neglected to mention the two newer codecs. Which do indeed carry twice the information.
 
Mattykins said:
I don't know how "early" you can say 2006 was when Paramount was still using MPEG-2? I neglected to mention the two newer codecs. Which do indeed carry twice the information.
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From the wiki BluRay site:

"The first BD-ROM players were shipped in the middle of June 2006, though HD DVD players beat them in the race to the market by a few months.[20][21] The first Blu-ray Disc titles were released on June 20, 2006"

So I'd say 2006 was pretty dang early...
 
And now back to our regularly scheduled program in progress.....


So, basically each job will really define what true HD is.

At the end of the day it's the Golden Rule.

He with the Gold makes the Rules.


Our job is to perfect our art and craft in a format suitable for our target audience...

That's really the long and short of it I suppose.
 
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