XL1s direct to SCSI

Virginia Benedict · September 23rd, 2003, 07:40 AM

Thanks Jeff,

Am I correct in assuming that FireWire and composite/component technologies are used for the same purpose: To transfer Video signals/data from one device to another.

But composite rendering the highest quality? Used mostly in the Broadcast Media?

Firewire rendering cost efficiency to popular use without much generation loss?

Jeff Donald · September 23rd, 2003, 07:48 AM

FireWire is just a pipe for moving data from one location to another, just like SDI (serial digital interface). Whereas, composite and component are specific video standards. FireWire is digital only and composite and component can be both analog or digital.

Rob Lohman · October 5th, 2003, 04:28 PM

Keep in mind that even if you have a board that will capture
uncompressed you are not certain what signal the XL1S
outputs and wether or not it already has been through a
compression/decompression cycle!

That said, there are at least two options available to directly
record to a harddisk with a DV camera. Search this forum
on the words Firestore and see this thread

Juan P. Pertierra · October 5th, 2003, 07:26 PM

I'm pretty sure the XL1s output's standard 4:1:1 5:1 DV video, the same that goes to tape.

However, I saw comparison screen shots on scott billups sites that have some small differences between the images from tape and those recorded direct from camera, so i'm not sure if this is a mistake or what.

The data on the firewire port HAS to be DV standard (compressed)compliant, otherwise you couldn't capture it with a DV program.

Rob Lohman · October 5th, 2003, 07:48 PM

The data over the firewire bus is indeed always compressed DV.
I was talking about the analog output ports to capture perhaps
uncompressed

Juan P. Pertierra · October 5th, 2003, 08:58 PM

Ah i see..yeah that is true. A test could be done with an image that generates a lot of DV compression artifacts, and look for artifacts on the analog output, as compared to the DV output.

Bob Maple · October 11th, 2003, 12:57 PM

At that point you'd just be trading artifacts assuming there was a difference; Analog/composite artifacts for DV ones.

September 23rd, 2003, 07:48 AM	#17
Jeff Donald Warden Join Date: Mar 2002 Location: Clearwater, FL Posts: 8,287	FireWire is just a pipe for moving data from one location to another, just like SDI (serial digital interface). Whereas, composite and component are specific video standards. FireWire is digital only and composite and component can be both analog or digital. __________________ Jeff Donald Carpe Diem Search DVinfo.net for quick answers \| Where to Buy? From the best in the business: DVinfo.net sponsors

October 5th, 2003, 04:28 PM	#18
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	Keep in mind that even if you have a board that will capture uncompressed you are not certain what signal the XL1S outputs and wether or not it already has been through a compression/decompression cycle! That said, there are at least two options available to directly record to a harddisk with a DV camera. Search this forum on the words Firestore and see this thread __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

October 5th, 2003, 07:48 PM	#20
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	The data over the firewire bus is indeed always compressed DV. I was talking about the analog output ports to capture perhaps uncompressed __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

September 23rd, 2003, 07:40 AM	#16
Virginia Benedict Regular Crew Join Date: Jul 2003 Location: New Castle, NY USA Posts: 25	Thanks Jeff, Am I correct in assuming that FireWire and composite/component technologies are used for the same purpose: To transfer Video signals/data from one device to another. But composite rendering the highest quality? Used mostly in the Broadcast Media? Firewire rendering cost efficiency to popular use without much generation loss?

October 5th, 2003, 07:26 PM	#19
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	I'm pretty sure the XL1s output's standard 4:1:1 5:1 DV video, the same that goes to tape. However, I saw comparison screen shots on scott billups sites that have some small differences between the images from tape and those recorded direct from camera, so i'm not sure if this is a mistake or what. The data on the firewire port HAS to be DV standard (compressed)compliant, otherwise you couldn't capture it with a DV program.

October 5th, 2003, 08:58 PM	#21
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	Ah i see..yeah that is true. A test could be done with an image that generates a lot of DV compression artifacts, and look for artifacts on the analog output, as compared to the DV output.

October 11th, 2003, 12:57 PM	#22
Bob Maple New Boot Join Date: Mar 2003 Location: Lakewood, CO Posts: 11	At that point you'd just be trading artifacts assuming there was a difference; Analog/composite artifacts for DV ones.