Tag Archives: frequency
Columbia University Engineers Build Smallest Integrated Kerr Frequency Comb Generator
The hard sciences depend on certainly specialized combs that help aid various processes. These include in their purview: telecommunications, pathfinding, tests in the field of medicine and...
Columbia University Engineers Build Smallest Integrated Kerr Frequency Comb Generator
The hard sciences depend on certainly specialized combs that help aid various processes. These include in their purview: telecommunications, pathfinding, tests in the field of medicine and...
A huge solar flare temporarily knocked out GPS communications
On the morning of 6 September the sun let out two pretty sizeable burps of radiation. Both were considered X-class -- the strongest type of solar flare -- with one of them proving to be the most powerful since 2005. If a solar flare is directed at Ea...
The US wants the world to offer more airwaves for 5G and drones
The US doesn't just want to carve out space for 5G cellular service on its own frequencies -- it wants the rest of the world to follow suit. FCC Chairman Tom Wheeler is calling on other countries to free up more of their wireless spectrum for the...
Scientists Create Ultrasonic Speaker and Microphone Using Graphene
American researchers found another great application of the wonder material graphene. University of California, Berkeley, physicists have used graphene to build lightweight ultrasonic loudspeakers...
Google web search reveals English letter frequency, helps our Scrabble hustle
Wordsmiths go to great lengths to master a game of Scrabble or Words With Friends. Rarely are their efforts quite so calculated, however, as what we're seeing today. After Google research director Peter Norvig used his company's search engine to determine letter frequency in the English language, Deadspin and developer Kyle Rimkus compared it against Scrabble's point system and available words to determine which letters generate the most value relative to how often they can play. In short: H, Y and Z produce the most bang for the alphabetic buck, while J and Q are plagues on the rack that are seldom worth saving for a special moment. We can't guarantee that following the Google-derived tips will have serious opponents begging for mercy -- a wide vocabulary is often the real clincher -- but they may help a few of us wondering what to play on that triple word score.
Filed under: Gaming, Internet, Alt, Google
Source: Peter Norvig, Deadspin
NHK 8K Super Hi-Vision camera captures native 120Hz footage, we go eyes-on at IBC (video)
We've seen plenty of 4K cameras, and we've even heard a whisper or two about 8K, but the quality of a viewing experience isn't tied only to resolution -- frame rate also comes into play, especially with fast-moving subjects. NHK's prototype Super Hi-Vision camera doubles the capture rate from the standard 60Hz to a much speedier 120Hz, yielding sharper motion. While the difference isn't noticeable with static or slow-moving scenes, it certainly comes into play when filming rapid-motion sporting events or panning the camera. The Japan Broadcasting Corporation's latest model was on hand at IBC in Amsterdam, and the advantages of a 120Hz cam were immediately crystal clear.
Filming a rotating image that paired ordinary objects and cityscapes with letters and numbers, you could see the difference instantly, with the 120Hz image on the right side yielding far shaper details, while the left side was often a blurry mess. There's no software smoothing on hand here -- because the higher frequency comes directly from the source, it appears perfectly natural, and much more pleasant. We captured a video demonstrating the expo floor rig, but because our camera doesn't sport the same spec, you won't notice a difference in the hands-on clip after the break. You can see the difference in our stills gallery below, however, and you can take us on our word -- the improvement is quite dramatic.
Filed under: Displays, Home Entertainment, HD
NHK 8K Super Hi-Vision camera captures native 120Hz footage, we go eyes-on at IBC (video) originally appeared on Engadget on Sat, 08 Sep 2012 16:29:00 EDT. Please see our terms for use of feeds.
Permalink | | Email this | CommentsFCC clears Sprint to run CDMA, 4G LTE on 800MHz iDEN airwaves
Sprint might not have its 4G LTE network up and running to power your EVO 4G LTE, but it's already getting more headroom. The FCC has just tweaked the rules around the ESMR (Enhanced Specialized Mobile Radio) spectrum to let Sprint, and the considerably more regional SouthernLINC Wireless, run their CDMA voice calls and LTE data on the 800MHz band they're currently using for their soon-to-end iDEN networks. In practice, the extra frequency access should be a tremendous help to at least Sprint, which hasn't had the low-level, indoors-friendly airspace that AT&T and Verizon enjoy with their 700MHz networks. Just don't expect your EVO or the rest of the initial Sprint LTE devices to take advantage any time soon, as you'll need to both get an 800MHz-ready phone as well as endure the long, long wait until Sprint switches on the extra LTE band in 2014.
FCC clears Sprint to run CDMA, 4G LTE on 800MHz iDEN airwaves originally appeared on Engadget on Fri, 25 May 2012 20:36:00 EDT. Please see our terms for use of feeds.
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FCC | Email this | Comments MetroPCS and T-Mobile want Dish to give up half of its wireless spectrum, worry about AT&T and Verizon swooping in
Dish Network might not start up its LTE-based 4G network until as late as 2016, but that hasn't stopped MetroPCS and T-Mobile from jointly telling the FCC that the would-be carrier needs to make some concessions for small carriers to rest easy. Both of the complaints have a common proposal that would see Dish give up 20MHz of its 40MHz space in the 2GHz range to prevent the satellite giant from using its abundant airwaves as part of a cash grab: MetroPCS and T-Mobile are worried Dish will just try for a "windfall" and sell the spectrum it doesn't need to AT&T or Verizon. While it's not asking for a sell-off, the Rural Cellular Association is still jittery about concentrations of power and wants the FCC to make Dish hit certain build-out targets, offer roaming at wholesale rates and require FCC approval for any roaming deal that would go to Big Blue or Big Red. The big carriers' advocacy group, the CTIA, is unsurprisingly against build-out demands as "unduly burdensome." FCC officials have been silent by comparison, although the agency has encouraged spreading spectrum around and proposed its own expansion requirements. You'll likely see smartphones with 2GHz frequencies at some point in the future -- it's just a matter of whether Dish or someone else slaps its logo on top.
MetroPCS and T-Mobile want Dish to give up half of its wireless spectrum, worry about AT&T and Verizon swooping in originally appeared on Engadget on Tue, 22 May 2012 01:53:00 EDT. Please see our terms for use of feeds.
PermalinkFierceBroadbandWireless | T-Mobile (PDF), MetroPCS (PDF), CTIA (PDF), RCA (PDF) | Email this | Comments