Em Wed, 9 Dec 2015 20:04:57 -0500 Maury Markowitz <maury.markow...@gmail.com> escreveu:
> I’m making some updates to the ATSC dtv-scan-tables. Two questions: > > 1) > Why do we have "us-ATSC-center-frequencies-8VSB” *and* > "us-NTSC-center-frequencies-8VSB”? They appear to be identical. The later > could, theoretically, list NTSC encoded channels instead of 8VSB, but doesn’t > actually do that. Suggest removing it? Hmm... maybe we could, instead, keep one of them as a "complete" ATSC possible channel list, and the other ones with the unregulated channels stripped. > > 2) > A number of the channel listings in those files have not been used for > television use for several years now. Specifically channels 2 to 6 and > everything from 51 and up were long ago sold off to cell phone use. > > Additionally, channel 37 was *never* used, at least in the US and Canada, > because it interfered with radio astronomy (IIRC it was sitting on one of the > Lyman lines). For terrestrial TV, those are unused, but perhaps the ATSC/NTSC channeling might still be used by some cable operator. Also, those channeling files work on other Countries outside America, like South Korea. > > Since scanning through all of these channels will no longer work, perhaps it > would be time to remove them? It reduces the total scan list from 80 channels > to only 45, and would greatly improve scan times.-- I rename one of the files to "us-ATSC-T-center-frequencies-8VSB" with just the channels that are actually regulated for terrestrial (air) broadcast, and keep the other file renamed to let is be clearer. Something like: "us-ATSC-C-center-frequencies-8VSB" or even keeping it named as "us-NTSC-center-frequencies-8VSB". Regards, Mauro -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
