On Fri, Jul 25, 2014 at 11:52 AM, David C. Rankin <drankinatty@suddenlinkmail.com> wrote:
On 07/25/2014 06:59 AM, Greg Freemyer wrote:
at 25 frames per sec, that's ~50 M/s needed for uncompressed HD video
8 bit color on a HD display!
Oh...
Wasn't that already in the mix?
1 full-frame = 1920x1080 = 2,073,600 *bytes* (8 bits per byte/pixel) or ~2M
at 25 frames per sec, that's ~50 M/s needed for uncompressed HD video
I guess my abbreviations were confusing. If we were taking about bits, or Mega bits, per sec, then
then ~50 M/s * 8 bits/pixel => ~400 Mbits/s :)
I can never remember the standard for transmittal units, whether to give them in bits or bytes. I always end up having to divide the numbers out to confirm throughput....
David, You missed my point. It is 50 million pixels of color information per second as you say, but you are using 8-bits per pixel, that is pretty shabby for a HD display. RGB often uses 24-bits. The HDMI interface requires at least 30-bits: http://en.wikipedia.org/wiki/Color_depth#Industry_support So it is ~50 M pixels/s * 30 bits/pixel => ~1.5 Gbits / sec So a 1 Gigabit NIC can't keep up with the needs of the display even ignoring overhead concerns. Greg -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org