Does that mean I can use a resolution of 1280 *768 * 60Hz with a 720p Video on the BBB
On Wednesday, May 22, 2013 at 10:46:02 PM UTC+1, David Anders wrote: > > the “maximum” resolution is directly related to maximum pixel clock of > 85MHz with audio support. it supports any resolution as long as the pixel > clock rate is less that 85MHz when audio is enabled. some examples are: > > 1280 x 1024 x 60Hz = 78643200 = 78.6MHz > 1440 x 900 x 60Hz = 77760000 = 77.7MHz > 1920 x 1080 x 30Hz = 62208000 = 62.2MHz > > in practice all resolutions “that are supported” are listed with a 50Hz or > 60Hz > refresh rate > <http://rd.bizrate.com/rd?t=http%3A%2F%2Fwww.adorama.com%2FPCTCL24X5.html%3Frefby%3Dbrate&mid=22495&cat_id=11520000&prod_id=4382750575&pos=0&rf=af1&b_id=17&bamt=74aefc87590041ce&ppr=6f9c61184822c4e4&oid=4406782676&country_code=US&atom=10394&bid_type=2&af_assettype_id=12&af_creative_id=8&af_id=6784>. > > as you can see from the example calculations, you could support a > framebuffer of 1920×1080 with low refresh rates, however when the linux > kernel does an EDID read, it will select ones with the “standard” refresh > rates. > > (1920 x 1080 x 60Hz = 124416000 = 124.4MHz) > the beaglebone black can generate up to 125MHz clock for video, however to > this leaves no bandwidth for audio to be multiplexed into the hdmi protocol. > > > > > On Wednesday, May 8, 2013 5:05:24 AM UTC-5, [email protected] wrote: >> >> The Beagle Board Black system reference manual rev A5.2 says (in the >> HDMI section): >> >> Currently the following resolutions are supported via the software: >> 1280 x 1024 >> 1440 x 900 >> 1024 x 768 >> 1280 x 720 >> >> This is a bit disappointing because we don't have 1920 x 1080... arguable >> "full HD". I believe the current Raspberry Pie has more than 1920 x 1080. >> Is this limit imposed by the hardware of the software? Are we expecting >> higher >> resolutions in future software releases? >> >> Thnaks >> >> Richard. >> >> >> >> -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
