Tag Archives: Digital Radio Mondiale

Inntot Technologies focuses on SDR based DRM+ Receivers

(Image Source: @YogendraPal9)

(Source: Inc42)

[…]Inntot Technologies provides software-enabled IP solutions for Digital Radio Mondiale (DRM for AM and FM band, a set of digital audio broadcasting guidelines) enabled receivers, DAB/DAB+ (digital audio broadcasting) enabled receivers and ISDB-T (A technical standard for digital TV broadcast) Digital Television paving way to digital radio transmission.

Though the transmission side in India is almost ready, next-generation digital radio receivers are expensive (can go upto INR 14K), which is posing as a hurdle in the common man from benefiting from the features offered by digital radio.

[…]Inntot Technologies is facilitating software-defined radio (SDR) based DRM+ Receiver solution, wherein the software can be embedded directly to the fixed receivers, automotive/in-car radios, smartphones, as well as USB dongles.

[…]Inntot solution is different from using a separate hardware demodulator which adds to the overall cost of the digital radio receiver.

Inntot’s software solution can also help OEMs, radio receiver manufacturers, and semiconductor chip manufacturers in:

  • Doing away with the recurring cost of the demodulator chip, which, in turn, will reduce the bills of material (BoM) cost — ideal for a high-volume market like India
  • Easy portability on platforms like Android
  • Reusable, fully standard, and specifications-compliant complete stack and no external dependency on any vendor
  • System integration and field testing

[…]Inntot is not the only company looking to offer cost-effective DRM receivers. Launched in 1993, the New Delhi-based OEM manufacturer Communications System Inc., has also put up its digital radio for sale on online websites like Amazon, and IndiaMart.

As of May 2018, the company has put up a notice for being in production for the second batch of digital radio receivers. However, despite tracking for weeks, its status remains ‘currently unavailable’ on Amazon, while we were not able to place an order from Indiamart.[…]

Read this full article at Inc42.

 

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Encompass DRM tests from Woofferton March 26 and 27

Photo by Flickt user Shirokazan via Wikimedia Commons.

(Source: Mauno Ritola via WRTH Facebook page)

Encompass (BBC content) Encompass DRM tests from Woofferton are planned for March 26th and 27th:

  • 1200-1300 UTC 11780 kHz
  • 1500-1600 UTC 11790 kHz”

Very strong signal on 11780 kHz now.

Thanks for the tip, Mauno!

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Chairman of DRM Consortium looks at the current state of shortwave

(Source: Radio World via Maichael Black)

Note that the excerpt below is only a portion of the full article. Read the full piece at Radio World.

Does Shortwave Have a Future?

by RUXANDRA OBREJA

When is the last time you heard a shortwave radio transmission? And why should you put up with possible crackly audio and some interference when we have now internet, satellites, FM and all forms of digital radio?

[…]Shortwave is just short of a miracle, actually. When it is beamed at an angle, it hits the ionosphere. A mirror around the Earth and then it falls like a ball at great distances, beyond the horizon. Thus these transmissions reach listeners over large areas, continents and beyond. Two or three high-power transmitters can potentially cover the entire world.

Shortwave is used not just by international radio stations or radio amateurs but is also essential for aviation, marine, diplomatic and emergency purposes. Shortwave signals are not restricted or controlled by the receiving countries and, as frequencies change in winter and summer, they need to be coordinated internationally.

[…]Digital Radio Mondiale was originally invented to offer medium (AM) and large coverage (HF) and the advantages of the good audio quality and extra multimedia services that can take shortwave into the 21st century. Maybe DRM was ahead of its time. The phasing in of digital broadcasts internationally was not in tandem with the production and sale of receivers, which remains a regional and national business. Since its birth DRM has proven that it is a suitable option for shortwave offering an good digital quality of audio and even short live video at great distance without fading and crackly sound.

Now, at last, there are DRM receivers capable of receiving shortwave, there are broadcasts and interested broadcasters. Quietly and surely shortwave is being re-examined and appreciated for the quality of broadcasts and its potential as a “crisis radio” too. It can become crucial in emergencies when local and regional radio stations, satellite and internet may be off the air due to damage. Broadband is getting cheaper but is limited, 5G will come but not just yet, digital shortwave is here.[…]

Click here to read the full article at Radio World.

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Radio World: “China Makes Its DRM Move”

Screen Shot from a China National Radio DRM test (Source: DRM.org)

(Source: Radio World via Michael Bird)

The nation becomes world’s leading Digital Radio Mondiale shortwave broadcaster in just one year

Hans Johnson

BEIJING — It appears as if China has jumped into Digital Radio Mondiale shortwave broadcasting with both feet. Some DRM infrastructure has been in place for over a decade, but up until recently had only been sporadically tested.

Just over a year ago, China had no regular DRM presence. Today, it is the world’s largest DRM shortwave broadcaster. China operates the most DRM transmitters in this band and has the most extensive schedule.

The initial broadcasts started in early 2018 from Beijing. Services continued to rollout over the year via various transmitter sites, often on the country’s periphery.

A DRM shortwave transmitter in Beijing targets north China almost 24 hours a day. A second Beijing transmitter targets east China for eight hours a day.

Another transmitter in Ürümqi in the country’s west targets central and east China for 14 hours a day, while a transmitter in Qiqihar, Heilongjiang province (the Manchurian plain), is on more than 11 hours a day and reaches south and southwest China. Dongfang on Hainan Island province is on eight hours a day on two frequencies for both north and southeast China. Finally, the DRM shortwave transmitter located in Kunming in the Yunnan province is on eight hours daily for south China. There is now a DRM network providing nationwide coverage.

By comparison All India Radio has 11.5 hours a day of shortwave time coming from a single transmitter. The Indian broadcaster has as many as three more DRM-capable shortwave transmitters but they are not on air at present. India does operate 38 AM (medium wave) transmitters for its domestic network, however.[…]

Click here to continue reading the full article at Radio World.

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