10bit 4:2:2 out of sdi port while recording to SxS cards at DVinfo.net

Ed David · March 9th, 2010, 04:30 PM

just was asked this. while recording on a Sony EX1 to SxS as the same time as nanoflash - that's not going to suddenly send 4:1:0 out of the SDI port - that stays uncompressed, right?

Dan Keaton · March 9th, 2010, 08:43 PM

Dear Ed,

The HD-SDI port is always uncompressed. It will always be 4:2:2.

David Issko · March 10th, 2010, 05:23 AM

And in 8 bit, not 10 bit.

Cheers

Dan Keaton · March 10th, 2010, 07:45 AM

Dear Friends,

The HD-SDI out of a Sony EX1/EX3 is always 4:2:2 10-bit.

The nanoFlash is an 8-bit recorder, as it uses MPEG-2, an 8-bit codec. With 8-bit, one gets approximately 16 million colors.

But before you dismiss it out of hand, since it is 8-bit, one should carefully examine the actual picture quality.

The images out of a nanoFlash are of very high quality, and have low noise.

The low noise part is very important. A 10-bit recorder, with higher noise, is far less desirable than an 8-bit recorder with low noise.

Another factor is the quality of the compression. Previous, typically lower bit-rate, or less sophisticated codecs, could show image problems. Many attributed this to the codec being 8-bit, where the actual problem was the low bit rate or the compression scheme itself.

To the best of my knowledge, it is very difficult to find an example of color banding with the nanoFlash.

The actual proof is in the images, which speak for themselves.

David Issko · March 10th, 2010, 01:59 PM

Sorry, I meant to say that the nano will record in 8 bit.

Dan Keaton · March 10th, 2010, 02:00 PM

Dear David,

No problem, I was just trying to be clear.

March 9th, 2010, 04:30 PM	#1
Ed David Regular Crew Join Date: Jan 2008 Location: Brooklyn, NY Posts: 119	10bit 4:2:2 out of sdi port while recording to SxS cards just was asked this. while recording on a Sony EX1 to SxS as the same time as nanoflash - that's not going to suddenly send 4:1:0 out of the SDI port - that stays uncompressed, right?

March 9th, 2010, 08:43 PM	#2
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Dear Ed, The HD-SDI port is always uncompressed. It will always be 4:2:2. __________________ Dan Keaton Augusta Georgia

March 10th, 2010, 05:23 AM	#3
David Issko Major Player Join Date: Jul 2008 Location: Melbourne, Australia Posts: 393	And in 8 bit, not 10 bit. Cheers __________________ David Issko Edit 1 Video Productions

March 10th, 2010, 07:45 AM	#4
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Dear Friends, The HD-SDI out of a Sony EX1/EX3 is always 4:2:2 10-bit. The nanoFlash is an 8-bit recorder, as it uses MPEG-2, an 8-bit codec. With 8-bit, one gets approximately 16 million colors. But before you dismiss it out of hand, since it is 8-bit, one should carefully examine the actual picture quality. The images out of a nanoFlash are of very high quality, and have low noise. The low noise part is very important. A 10-bit recorder, with higher noise, is far less desirable than an 8-bit recorder with low noise. Another factor is the quality of the compression. Previous, typically lower bit-rate, or less sophisticated codecs, could show image problems. Many attributed this to the codec being 8-bit, where the actual problem was the low bit rate or the compression scheme itself. To the best of my knowledge, it is very difficult to find an example of color banding with the nanoFlash. The actual proof is in the images, which speak for themselves. __________________ Dan Keaton Augusta Georgia

March 10th, 2010, 01:59 PM	#5
David Issko Major Player Join Date: Jul 2008 Location: Melbourne, Australia Posts: 393	Sorry, I meant to say that the nano will record in 8 bit. __________________ David Issko Edit 1 Video Productions

March 10th, 2010, 02:00 PM	#6
Dan Keaton Inner Circle Join Date: Dec 2002 Location: Augusta Georgia Posts: 5,421	Dear David, No problem, I was just trying to be clear. __________________ Dan Keaton Augusta Georgia