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A single fiber strand could carry the world's internet traffic
Researchers in the US and Netherlands have managed to transmit data at 255Tbps across a single strand of fiber cable over a kilometer (0.6 miles), about 2,500 times faster than any commercial fiber. They used a so-called multicore cable with seven separate channels, but the hardware alone didn't account for the speed. They also squeezed 50 carriers down the seven cores, cranking each up to 5.1 Tbps using "spatial multiplexing." None of that tech alone is new, but the net result of that was 255Tbps (31.8 Terabytes per second), enough to handle the world's peak internet traffic, according to ExtremeTech. Don't expect a speed boost at home anytime soon -- there's no way to mass produce the cables yet, and current infrastructure wouldn't support it anyway. But at least you can look forward to a day when you could download all 317,060 movies in the IMDB in two and half hours.
Comcast Media Center gets creative with compression
Make no mistake about it, as the bandwidth belt tightens around cable, carriers are grasping for ways to cram more channels into an increasingly small space. Reportedly, Comcast Media Center has devised a method to stuff three HD signals into a single 6MHz carrier, which is typically just enough to handle two HD channels without picture quality taking a dive. Though the process sounds quite technical, the long and short of it is that a "second-pass MPEG-2 encoding system from startup Imagine Communications" is reportedly being used to "stack together three signals at variable bit rates into one 6MHz QAM channel." Of course, it's hard to say if this clever methodology results in noticeably poorer picture quality, but unless something drastic happens in the world of coax, you can count on seeing a whole lot more where this came from.
