Axiom Home Page Forums General Discussion Technical Questions What is "4:4:4 Signal Processing" for a DVD player

The Panasonic DVD-S97 has what they list as "4:4:4 Signal Processing" but I have no idea what that is. Any ideas?

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The Panasonic DVD-S97 has what they list as "4:4:4 Signal Processing" but I have no idea what that is. Any ideas?

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4:4:4, depending on the application refers to sampling rate of each channel. Originally it refered to component (luma, and the two chroma difference) but sometimes now I understand it refers to Red Green Blue.

All it means is that the luma and both chroma difference channels are sampled at 4x subcarrier (subcarrier is 13.5MHz). Professional Beta (SP & SX) is sampled at 4:2:2 while DV, DVCAM and DVCPRO are 4:1:1.

What does it mean from a DVD-P standpoint? That it does its upsampling and any other signal enhancement at the full available sampling rate. Sounds good, and maybe someone else can chime in here, but I don't know of any DVD-P that doesn't do the same?!?

Bren R.

Damn, Bren - that's EXACTLY what I was going to say.

Well, OK, maybe not really exactly, but close.

I was going to say "64" but I like Bren's answer better.

http://www.tvtechnology.com/features/Tech-Corner/f-RH-4.2.2-07.10.02.shtml

aaaaaaaaaaaaaa yahhhhhhh what Bren said

Believe me, I've had this argument a million times with the Khristmas Kamcorder Kiddies.

"DV is broadcast legal, man.. play my skate video!"
'Uh, DVs pedestal is 0 IRE and 4:1:1 colour space, it is not broadcast legal'
"Well, I seen DV stuff on TV"
'Yes, my brother shot a documentary in Brazil and Jamaica (and in fall will be going to Kenya) on DVCAM, and it was legalized in regards to video levels before broadcast... but out of necessity, they brought a Sony PD-150 prosumer camcorder because lugging a DXC-50 ENG-style camera may have gotten them shot or imprisoned! One of my shooters had to get footage of crews taking down the Golden Boy a gilt statue on top of our legislative building for restoration. The trapdoor up to where he is is the width of a thin man's shoulders, so they sent him with a Sony VX-1000... yes, the stuff hits air, but baby... it ain't broadcast'

And you don't want to know how DV does 16:9... anamorphic. *shudders*

Bren R.