jeff detweiler – DIYmedia

Earlier this summer Radio World published one of its occasional special “e-books,” this one called “HD Radio From the Ground Up” (form-filling required to download). Like most industry trade publications, it’s a celebratory document that seeks to paint the U.S. digital broadcast system in the best possible light.
Kicking things off is a tech-centric column from Scott Fybush in which he talks with various enginerring principals about the efficiency of today’s FM-HD Radio systems. Unlike the first few generations of the tech, which involved wildly inefficient combination of the analog and digital signals, improvements to the HD system now make for a better marriage. In HD’s early years, more than 30 percent of the power that went into the analog/digital combination process was lost as waste heat; now that number is down to something like 10 percent. Continue reading “HD Radio Makes "Progress," But Analog Still Rules”

Since my run-in at the NAB Radio Show with industry forces spearheading experimentation with the all-digital AM variant of HD Radio, they have been busy. Back in September, testing was underway on stations in Seattle—the eighth and ninth such stations to conduct tests in the last two years—and the NAB et al. described the preliminary results as quite positive.
When the tests concluded in October, the president of the stations hosting them in Seattle said that while the experience was good, some listeners wondered if their stations would be going all-digital anytime soon. Not for at least 10 years, replied the executive, “because regulatory efforts take time.” Continue reading “Next Steps for All-Digital AM-HD”