HD-SDI Output 4:2:2 or 4:2:0?

[Jerry Matese]

Forgive me if this was answered elsewhere in this forum. I know the EX records in 4:2:0 but does the SDI output offer 4:2:2 output prior to recording?

[Bill Ravens]

by definition, HD-SDI is 4:2:2.
It's been confirmed that the EX1 outputs real 4:2:2 at the SDI port and not a 4:2:0 in a 4:2:2 wrapper.

[Jerry Matese]

So this is super clean, uncompressed 8bit 4:2:2 1080p right?

[Bill Ravens]

according to what I've read. I haven't personally confirmed this. And isn't HD-SDI 10 bit? I think so.

[Jerry Matese]

it can be either 8 or 10

[Jerry Matese]

Is there something official from Sony on this?

[Sean Donnelly]

Juan Martinez, a high ranking person at Sony US, was quoted in an earlier thread saying it is true 10 bit 422 uncompressed HD-SDI. Do a search, I'm sure you'll find it.

-Sean

[Michael H. Stevens]

8 bit 4:2:0 is what you get on the SxS card. The SDI is 10 bit 4:2:2

[James Brill]

It only outputs 60i correct? For example, if you filmed in 1080/24p and wanted to capture or send to tape via the hd sdi output the camera puts a pull down in it.

[Jerry Matese]

Originally Posted by James Brill

It only outputs 60i correct? For example, if you filmed in 1080/24p and wanted to capture or send to tape via the hd sdi output the camera puts a pull down in it.

Are you saying the HD-SDI output will not output a progessive signal 24P, 30P or 60P???

[Greg Boston]

Like most cameras that record in 4:2:0 with an HDSDI output, the camera will give true 4:2:2 output only when the signal is taken live from the camera head. After recording, what comes out is 4:2:0 upsampled or wrapped in 4:2:2 in order to comply with HDSDI specs.

In live mode, it's confirmed that the EX1 outputs a true 10 bit HDSDI signal.

-gb-

[Jerry Matese]

Can it output 1080P from the HDSDI with 422 space before recording??

[Steven Thomas]

Someone correct me if I'm wrong, but I believe it's standard for HD SDI to pump out 1080P at 1080i with pulldown.

In fact, this is how data is stored on DVDs. 24P Movies are encoded to DVD interlaced with pulldown. Progressive conversion can be performed digitally inside the progressive player. Since DVDs must have the ability to display interlace, they must be stored in that format.

[Greg Boston]

Originally Posted by Steven Thomas

In fact, this is how data is stored on DVDs. 24P Movies are encoded to DVD interlaced with pulldown. Progressive conversion can be performed digitally inside the progressive player. Since DVDs must have the ability to display interlace, they must be stored in that format.

Steven, I'm fairly certain that you can author a DVD in true 24P without pulldown. This is an old trick for gaining about 20% extra capacity on a DVD. The player will create the pulldown to 60i upon output to the TV. The extra capacity can then be used to fill out the space with a higher quality encode or, keep the same quality and add more running time to the program.

-gb-

[Jerry Matese]

Still looking for a clear answer here.
Does the EX output true 4:2:2 1080P from the HDSDI port?