2017 came and went with no great movement in the HD Radio space. According to FCC records, fewer than 2,000 FM stations have received authorization to broadcast in HD, which represents an adoption rate of 15% – a number that has not changed significantly during this decade.
On the AM side, although some 240 stations (5%) are authorized to broadcast in HD, this curated list shows that about half of them have abandoned the protocol. Penetration of HD receivers into the automotive space remains at just under half of all new cars sold in the United States and there’s still no meaningful market for non-automative portable receivers.
Yet the broadcast industry would rather you believe that HD is thriving. A new “e-book” from the folks at Radio World, New Directions for HD Radio, contains useful information about ways to optimize the system, including making sure that the analog and digital signals are properly time-aligned, the necessity of seamless audio processing across the airchain, and National Association of Broadcasters effort to standardize the broadcast of metadata on HD signals. One would think those core operational principles would’ve been hammered out nearly twenty years ago when the technology was first authorized for deployment, but it was more important to the industry to make a digital beachhead on the airwaves than it was to deploy something that worked out of the box. Continue reading “HD Radio Still in Stasis, But Has New Friend at FCC”
Tag: xperi
Radio With Pictures Still A Hard Sell
Believe it or not, there are still some U.S. broadcasters tinkering with the HD Radio protocol. One of the latest is Rick Sewell, the manager of engineering for Crawford Broadcasting’s stations in Chicago.
His latest project involved implementing HD’s “Artist Experience” feature – this is a fancy name for what is basically radio with pictures. AE allows HD-compatible stations to send album artwork and advertiser-images to digital radio receivers along with the audio programming; these are things that digital-native audio streaming services such as Pandora and Spotify mastered years ago.
There’s no coordinated drive from the broadcast industry to implement Artist Experience, and HD’s proprietor, Xperi Corporation, isn’t actively marketing the technology to broadcasters much anymore. Apparently, one of Sewell’s colleagues was down in Atlanta and got a rental-car with an HD-compatible receiver. This guy stumbled across a station that had implemented AE and thought, “we should do this too.”
Thus began Sewell’s saga. He’d initially hoped that he would have time to explore the HD system in more detail, but station management had already started pitching the Artist Experience opportunity to advertisters. The first step was to make sure that the HD airchain of the station on which AE would be deployed was totally up to date. That got figured out after Sewell got over his own “ignorance as well as some misinformation along the way.” Continue reading “Radio With Pictures Still A Hard Sell”
HD Radio Cracked on Receiver-Side
One of the largest controversies involving the U.S. digital radio standard, HD Radio, has been its proprietary nature. The technology’s owner, iBiquity DTS Tessera Xperi Corporation, has refused to make public all the necessary technical information within the standard, dubbed by the National Radio Systems Committee as NRSC-5; this ostensibly prevents anyone from developing or manufacturing any HD-related transmission or reception technologies without express licensure from Xperi.
The specific “black box” that has kept the technology proprietary has been the algorithm Xperi uses to encode and decode HD audio signals. If you look at the publicly-available NRSC-5 documentation, you find no meaningful detail about this aspect of HD technology beyond a description of how it works.
This was a site of controversy during HD’s tortured development: initially, the standard was to utilize an algorithm derived from publicly-accessible code – but once the FCC gave the standard its blessing, then-developer iBiquity swapped out the codec under which the technology had been tested with a new one that it had ginned up wholly in-house. But it performed so poorly that HD’s proprietors replaced it again with the variant onboard transmitters and receivers today. Continue reading “HD Radio Cracked on Receiver-Side”
LPFM + HD Radio = 💰🔥
Another LPFM station has taken the plunge into the HD Radio space: introducing KVCB-LP, run by the Vacaville (CA) Christian Schools. KVCB is the second LPFM station to be authorized by the FCC to broadcast in HD – the first was WGVV-LP in Rock Island, Illinois, which received FCC authorization for digital broadcasting last decade, though it’s unclear if the station ever deployed it.
KVCB-LP was the brainchild of music teacher and genuine prodigy Ralph Martin, who’s long had the radio-bug: in 1997 he built a network of Part 15 AM transmitters for the students to use, and when the LPFM service was initially authorized in 2000, Martin made all the necessary plans to apply for a license.
Congressional meddling into LPFM – namely, tightening the interference-protection standards on these small stations – meant that Vacaville went from having potential channels available to having none. But Martin bided his time, and when Congress undid many of the restrictions on LPFM earlier this decade and the FCC opened another application-filing window, he was ready. Construction permit in hand, the station went on the air, initially analog-only, in 2014. Continue reading “LPFM + HD Radio = 💰🔥”