Tuesday 27 August 2019

DRM Highlights 'Smart Radio For All' at IBC 2019 .


Under the overarching theme "DRM – Smart Radio For All" the DRM Consortium has planned for two interactive sessions at this year’s IBC at Amsterdam to look at the practical implementation of DRM in various parts of the world. The focus of the sessions will be also on receivers and exciting receiver solutions.

The first event convened by the DRM Consortium is to be held on September 13 and will be hosted by Gospell under the title "The Gospell receiver – end to end solution for your needs".

The next day, the Consortium invites those interested to an interactive session, to be held at the Nautel booth, on the latest implementation of DRM across the world, its benefits and the questions that the standard can answer in 2019.

Ruxandra Obreja, the Consortium Chairman, says that: "The Consortium members want to update all those interested with the many developments of DRM across the globe. The progress made in Asia, the current demo In Russia, the possibilities in South Africa and Brazil are all worth highlighting and discussing. The interest and practical roll out of DRM demonstrates that DRM makes possible an immediate digital future for all broadcasters large or small, offering more programme choice to listeners, extra multimedia services, emergency warning functionality with increased energy savings, spectrum efficiency and full country coverage."

Other Consortium members attending the IBC exhibition are: BBC, Encompass Digital, Fraunhofer IIS, JVCKenwood, NXP, RFmondial, Sony.

Read more at: http://www.asiaradiotoday.com/news/drm-highlights-smart-radio-all-ibc-2019 © Radioinfo.com.au

Monday 26 August 2019

Technology Updates - U.S.-Based Shortwave Broadcasters Eye Digital

DRM radio prototype from StarWaves

Given the NASB’s interest in low-cost DRM receivers, it was no coincidence that Johannes. Von Weyssenhoff was invited to speak at the annual meeting. Von Weyssenhoff said his StarWaves manufacturing firm (www.starwaves.de) has the technology, capability and existing prototypes to build DRM radios for $29 each, but only if the sale order is large enough to deliver economies of scale. (He also estimated $18 DRM modules could be built for installation in other radio models.)

“Twenty-nine dollars is doable at volumes staring at 30,000 receivers,” Von Weyssenhoff told Radio World. “Even smaller quantities would be possible at this price for very simple radios — for example, without graphics displays — but these would be special projects that had to be discussed individually. But even more advanced radios with Bluetooth or premium designs will be possible to offer at a reasonable price,” he said — as long as the sales orders was in the tens of thousands or more.

Given that India and China have committed to the DRM standard, there appears to be a mass-market for these receivers. But the problem for StarWaves is finding the money to build enough of them to drive per-unit costs down.

“In recent years I have tried to convince quite a number of potential investors but either I have not yet found the correct audience, or I was not yet able to communicate this great opportunity convincingly,” said Von Weyssenhoff. “You just have to imagine that alone in India, according to All India Radio, there is a demand of up to 150 million receivers within the next few years. This market could have been served with tons of receivers by now and big profits could have been made, but instead I had to grow the development in very small steps.”


Plug-in DRM module

The money StarWaves needs is not huge: “An amount of $150,000 or even $100,000 would certainly do wonders and enable us to start production within a few within a few weeks,” he said. “A commercial order of 10,000 receivers or more would have a similar effect.”

NASB’s members don’t have this kind of money available. Saddled with huge antenna farms and multiple power-devouring 50 kW to 500 kW transmitters, the commercial/religious shortwave broadcasting sector is tight for cash.

“Broadcasting DRM requires either a new transmitter or the modification of an existing transmitter,” said Kim Andrew Elliott, a retired Voice of America broadcaster and host of “Communications World” who has organized many demonstrations of DRM reception at the annual Winter Shortwave Listeners Fest going back to 2003.

“These days, many shortwave broadcasters are thinking about whether they should keep their existing shortwave transmitters on the air, rather than thinking about buying or modifying a transmitter.”

Their situation isn’t helped by the lack of audience measurements detailing SW’s far-flung listener base. Not only does a lack of SW ratings make it difficult to sell spots to advertisers, “but the squeaky, staticky sound of shortwave makes it hard for us to talk to the people at Coca-Cola, who fear that listeners will associate their product with inferior quality,” said Caudill.

The resulting conundrum is a classic chicken-and-egg dilemma. StarWaves and other DRM radio manufacturers don’t have the money to produce DRM radios in volumes that would make them cheap to buy.

Source:- https://www.radioworld.com/tech-and-gear/u-s-based-shortwave-broadcasters-eye-digital

Thursday 22 August 2019

New Android based DRM decoding App


If you would like to lighten the load of your DRM reception hardware, you could off load the work of decoding with a new Android based DRM decoding App. 

'DRM30' FREE
https://play.google.com/store/apps/details?id=com.algorkorea.app.drm1

'DRM+' $1.99 
https://play.google.com/store/apps/details?id=com.algorkorea.app.drmplus

Although air coupling the demodulated DRM Audio between the receiver speaker / headphone and the microphone input of the Smartphone / Tablet will work to some degree. Likely ambient noise will be introduced causing the decoding to be less than ideal. Holding the smartphone microphone near the demodulated DRM output is a quick way to check the SDC. A direct cable or even a filtered line may be needed to decouple Phone / PC / Receiver noise for a solid MSC and audio decode.

If you use a headphone / microphone multi pole plug (like the diagram below), the decoded DRM audio will automatically route to the Headphone jack, so an Audio Switching App (many available on google play store) can be used to route audio to the main speaker of the phone.

Let us know if you use this in your tests... And how it works...

Source:-http://ktwrdrm.blogspot.com/2019/08/drm-decoding-app.html?m=1

Thursday 1 August 2019

Silicon Labs introduces new hybrid software-defined radio automotive tuner supporting Digital Radio Mondiale



Silicon Labs enhances Si479xx automotive tuner family with SDR technology.

Silicon Labs has introduced new hybrid software-defined radio (SDR) tuners, expanding its portfolio to meet the growing need of automotive radio manufacturers to support all global digital radio standards with a common platform.

The Si479x7 devices are Silicon Labs’ first automotive radio tuners supporting the Digital Radio Mondiale (DRM) standard and are an extension of the company's family of Global Eagle and Dual Eagle AM/FM receivers and digital radio tuners.

Silicon Labs is also enhancing its Si4790x/5x/6x automotive tuners with a unique “SDR-friendly” technology, effectively transforming these devices into hybrid SDR tuners. Its hybrid SDR technology includes advanced DSP-based automotive features such as Maximal Ratio Combining (MRC), Digital Automatic Gain Control (AGC), Digital Radio Fast Detect and Dynamic Zero-IF (ZIF) I/Q. These features enable automotive radio manufacturers to support global digital radio standards with a common radio hardware and software design.

This added flexibility will help OEM and Tier 1 customers to reduce design, qualification, sourcing and inventory costs while avoiding the complexity and inefficiency of supporting multiple automotive radio platforms.

Silicon Labs’ automotive tuner portfolio includes highly integrated single and dual device options with best-in-class AM/FM receiver performance. The portfolio supports all broadcast radio bands including AM, FM, Long Wave, Short Wave, Weather Band, HD Radio, DAB (Band III) and DRM.

The tuners are built on Silicon Labs’ industry-leading RF CMOS technology, delivering outstanding automotive receiver performance. Their proven mixed-signal, low-IF RF CMOS design provides sensitivity in weak signal environments and improved selectivity and intermodulation immunity in strong signal environments.