Analog Component HD

fiercecurry said:
I think its really meant for hooking up to HD field monitors, but if some people want to believe its some secret tap into uncompressed HD, the equivalent to something like a Dalsa or a Viper or the Arri D20, than let them dream.
Click to expand...


??

Let's not forget all CCD sampling is an analog process.

Why is it that hard of a stretch to think you can't use the component out to SDI converter? This will bypass the compression codecs.

Not that I would do this due to the EXTREME processing and memory requirements. :)
 
Don't know where you're coming from, fiercecurry.

The analog output is uncompressed, in that it has not been compressed. The signal comes off of the DSP and it goes to two different places: the compression engine, for writing out to the cards/firewire, or to the analog ports.

It's the same capability that the Z1, FX1, and HD100 offer.

It's the same basic thing as the Canon's HD-SDI, except that HD-SDI keeps it in the digital domain. But it's taken from the same point in time. On all other than XLH1 cams, it gets converted to analog. On the XLH1, it stays digital. But it's uncompressed no matter how you slice it.
 
ok, i think i understand what you are saying, it bypasses the codec compression engine, and out to the analog component output directly. Once it goes via the analog, it is uncompressed. However, an analog component output is compressed compared to an SDI output.

What is your definition of HD uncompressed?

HD uncompressed is 12bit 4:4:4.

Is this the signal that the HVX is outputing?

If it is, thats fantastic!
 
I really am curious about the analog output capabilities of the HVX, so, in plain English, will this camera give me the same signal quality via its analog component out, that a Viper or Dalsa or Arri D20 would give?

Will it offer ANY IMPROVEMENT in image quality over the DVCPRO HD codec, if i choose to capture with a NLE codec like the ones by Blackmagic that is 12 bit 4:4:4 when capturing through a SDI capture card and a fast disk array?

Thanks.
 
12-bit 4:4:4? Yowza. That takes dual-link HD-SDI to output that.

Analog is not "compressed". It's analog. Compression is -- well, it's compression. Analog isn't compressed.

Think of it in terms of HDV -- with HDV you sidestep the MPEG compression engine -- and as such, the analog outputs of HDV cameras look substantially superior to the compressed output. There's no motion artifacting, no mosquito noise, no quantization errors... it looks like real HD.

With DVCPRO-HD the difference isn't quite as significant because the compression isn't as severe. DVCPRO-HD retains the 4:2:2 color sampling, HDV doesn't -- so an HDV cam's uncompressed analog signal will look substantially better, as compared to its HDV compressed signal, than a DVCPRO-HD cam's uncompressed analog will look as compared to its DVCPRO-HD compressed signal.

But the point is -- it's taking the signal at the cleanest point, just right after the DSP, and outputting it. It is not in its original form, no -- its original form is whatever the DSP outputs -- 4:2:2 14-bit, presumably. That gets converted to analog, or in the case of the Canon it gets converted to an 8-bit HD-SDI signal.

Will uncompressed analog from an HDV camera look better than the HDV output? Obviously, substantially, yes.

Will uncompressed analog from a DVCPRO-HD camera look better than the DVCPRO-HD output? Probably some, but not a whole heck of a lot. It won't have any mosquito noise, that's for sure -- but there may be other noise introduced in the very conversion to analog.
 
We did uncompressed capture via a cobalt version of the AJA box into a Kona card as a back up for our HVX shoot. It didn't look really different to me, but I didn't study it critically.

If you are planning on this workflow for 35mm film-out I don't think that the meta data/flagged 24p/pa frames exist via the RGB output. You'll need to figure that part out before mastering, and may complicate your plight somewhat.

I.
 
Barry_Green said:
Analog isn't compressed.
Click to expand...

Well, if it is 4:2:2 that is also sort of compression. Chroma channels get only half the bandwidth of luma channel. And the whole historical notation 4:2:2 comes from analog world...

YCbCr-signal is usually never 4:4:4. All equipment I've heard that uses 4:4:4 carries data in RGB-format.
 
Actually the HD10A is unnecessary if you buy a AJA Kona LH or any other
card which has HD component analog capture. You will need a xserve raid,
huge array or other sata, fiber array, etc. which is capable of 200mbs sustained
right speed to do uncompressed 4:2:2. I don't think 4:4:4 will yield any better
results with this camera given the chip size and noise level.

The HVX could be a great effects camera if used in a studio setting in this case.
You can choose the format to capture to, whether it be 10bit uncompressed
or 75% PhotoJPEG, which are both much better than DVCPROHD.

There is no portable capture solution other than the Viper Venom flash array or
maybe a few other systems which cost like 10 times the HVX itself.
 
will_griffith said:
There is no portable capture solution other than the Viper Venom flash array or
maybe a few other systems which cost like 10 times the HVX itself.
Click to expand...
Not at all...follow it:

LINK:

http://www.dvxuser.com/V3/showthread.php?t=40824 [HD-SDI Flash-RAM Recorder]

Other LINKS:

http://www.dvxuser.com/V3/showthread.php?t=41106 [introduction]

http://www.dvxuser.com/V3/showthread.php?p=375208#post375208 [JPEG2000@HVX]

http://www.dvxuser.com/V3/showthread.php?t=40603&page=9 [other thread link]
 
oh...did I say 10 times as expensive?? :)
I of course meant "more than the cost of the camera itself!"

At least the Russian recorder is portable. Has it actually been used on this
continent though? Does it really exist?

Also...you will need to buy the HD>HDSDI converter as well. Then figure out
where to record your audio.
 
will_griffith said:
At least the Russian recorder is portable. Has it actually been used on this
continent though? Does it really exist?
Click to expand...

http://www.dvxuser.com/V3/showpost.php?p=375119&postcount=20

http://www.dvxuser.com/V3/showthread.php?t=41226

will_griffith said:
Then figure out
where to record your audio.
Click to expand...
Maybe through the uncompressed 4 channels of the HVX itself. I just don't know if it works as recordable device at same time...who knows?...Barry are you there?
 
I don't see where it records audio. and even if it did it would be SDI and require a
muxer to combine the video and audio in the SDI signal, which is another 1k.
Made for use with sync sound like a dat or other I guess.
 
You must log in or register to reply here.
Back
Top