On Sun, Nov 24, 2013 at 1:02 PM, Chris Lee <updatelee@xxxxxxxxx> wrote: > This is a frustration of mine. Some report it in SNR others report it > in terms of % (current snr / (max_snr-min_snr)) others its completely > random. > > Seems many dvb-s report arbitrary % which is stupid and many atsc > report snr by 123 would be 12.3db. But there isnt any standardization > around. > > imo everything should be reported in terms of db, why % was ever > chosen is beyond logic. > > Is this something we can get ratified ? I wouldn't hold your breath. We've been arguing about this for years. You can check the archives for the dozens of messages exchanged on the topic. Given almost all the Linux drivers for ATSC/ClearQAM devices sold today report in 0.1 dB increments, I'm tempted to put a hack in the various applications to assume all ATSC devices are in that format. I've essentially given up on any hope that there will be any agreement on a kernel API which applications can rely on for a uniform format. Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
