Tag Archives: DRM

Chorus 4: The DSP chip that supports AM, FM, DAB, DAB+, HD Radio and DRM

FrontierSiliconThe London-based digital solutions company, Frontier Silicon, has announced a new DSP radio chip that offers a wide array of available modes and is even DRM ready.

I have seen no specifications for this chip yet, and do not know if it covers the shortwave radio spectrum.

Still, this might be the perfect chip to allow radio manufactures to design an inexpensive, fully digital product in countries where digital platforms are gaining strength (anywhere from the UK to India, for example).

Many thanks to Rob De Santos for apprising me of this. I’ll post the specifications when they become available. Read the full press release below:


(Source: Frontier Silicon Press Release)

Chorus 4 a single-chip solution, integrating four previously separate chips

London, 17th December 2013

Frontier Silicon announces details of Chorus 4, its next generation digital radio chip. Chorus 4 is a single-chip solution, which integrates four previously separate chips to deliver significant cost and energy consumption savings.

Chorus 4 is the fourth generation chip from Frontier Silicon. The chip is designed to encourage the continued advance of digital radio around the world by supporting all major global digital radio standards. Chorus 4 provides solutions for multiple devices, including consumer radios, the automotive aftermarket and, for the first time, smartphones and tablets. The company’s previous solutions have already powered over 20 million digital radios worldwide.

The key features and benefits of Chorus 4 are:

  • Low cost, single chip solution: integration of RF front-end, baseband, application processor and DAC (“four chips in one”) delivers significant cost savings which enable high quality, entry-level price point digital radios
  • Ultra-low power consumption – one month’s listening for 5-6 hours a day on a portable radio with four D cell batteries (comparable to FM performance)
  • Multiple solutions for portable and table-top radios, smart-device docks, wireless speakers, hand-held receivers, sound-bars and audio systems
  • Automotive aftermarket – solutions for head units, integrated convertors and low cost adapters
  • Smart devices – enables digital radio solutions for mobile phones and tablets
  • Bluetooth connectivity – connecting smart devices and digital radios to enable hybrid radio (with interactivity and additional content delivered via IP), music streaming and remote control
  • Integrated service guides – new software will enable listeners to select stations from a single list of digital and analogue stations regardless of platform
  • Multiple radio standards – including support for AM, FM, DAB, DAB+, HD Radio and DRM

Digital Tick compliant – Chorus 4 solutions meet all technology requirements of the UK minimum specifications for both domestic and automotive digital radio devices.
Frontier Silicon CEO, Anthony Sethill, said

“Chorus 4 represents a step change for the digital radio market. After ten years of development on this and previous solutions, we now have our fourth generation chip – an integrated, single chip offering enhanced functionality, lower cost and significantly greater energy efficiency. Chorus 4 will power multiple devices, including low cost automotive adapters and devices with Bluetooth connectivity. For the first time, digital radio in mass deployment smartphones will become a viable proposition. As a multi-standard chip, Chorus 4 will address emerging opportunities around the world. I look forward to working closely with broadcasters, transmission operators and device manufacturing partners to address these exciting opportunities.”

About Frontier Silicon Limited

Frontier Silicon is the world’s leading supplier of integrated circuits and modules for digital radio and connected audio products. Frontier Silicon is part of the Toumaz Group, a pioneer in low-power wireless semiconductor and software technologies for the consumer audio and wireless healthcare markets.

The group is headquartered in London, England, with design centres in Oxford, Cambridge, Hong Kong and Romania. The company also has sales and technical support teams in Hong Kong, China and Japan.

Frontier Silicon’s audio products offer solutions for DAB/DAB+, Internet radio and connected audio – from silicon through software to production-ready platform designs.

Customers supplied by Frontier Silicon include Argon, Bang & Olufsen, Bose, Bush, Denon, Dual, Geneva, Goodmans, Grundig, Hama, harman/kardon, Hitachi, JVC, Magic Box, NAD, Onkyo, Panasonic, Philips, Pinell, Pioneer, Pure, Revo, Roberts, Ruark Audio, Sangean, Sanyo, Sharp, Sony, TEAC, TechniSat, Tivoli Audio and Yamaha.

Frontier Silicon is a trademark or registered trademark of Frontier Silicon Ltd.

All India Radio publishes a tender for 800 DRM receivers

drmlogoThe DRM Consortium has posted an All India Radio (AIR) tender for 800 DRM AM/FM/Shortwave receivers.

AIR is seeking a DRM receiver with a feature set that would include:

  • DRM decoding on both shortwave and medium wave (AM broadcast) bands
  • 1 kHz tuning increments on DRM bands (with DRM auto lock)
  • Stereo speakers and headphone jack
  • Four line mono/color digital display
  • Built-in stereo recording of DRM broadcasts–including a scheduling feature
  • Upgradable firmware
  • Built-in rechargeable battery pack with 6 hour playback time

There are more specs/features, of course–click here or here to download a scanned copy of the actual AIR tender.

DRM Test Transmission from PCJ International

drmlogoOn October 13, 2013 PCJ Radio International will conduct a two hour DRM test transmission.

Date: October 13, 2013

Time: 10:30 to 12:30 UTC

Frequency: 15,645 khz

Beam: South East & East Asia

Send your reception reports for this transmission to [email protected]

DRM tests from Moscow starting tomorrow morning

drmlogoThe WRTH Facebook page has noted that DRM tests from Moscow will take place on 25,900 kHz starting Friday, March 22nd (tomorrow) at 10:00 UTC and ending on Saturday, March 23rd at 10:00 UTC.

Details of each broadcast can be found here–see English version via Google Translate.

They’re asking that all DRM reception reports be logged in this online forum with a detailed description and even sound clips of audio reception, if possible.

Shortwave Radio Recordings: The Disco Palace (in DRM)

DiscoBallPerhaps one of the things I love the most about SWLing is the sheer variety of broadcasters out there. We can sample diverse offerings across a broad spectrum–from the BBC World Service to Radio Romania International, from pirate stations to numbers stations.

There’s even The Disco Palace: a station that plays only disco music, and each show is mixed thematically. This station broadcasts online and over shortwave radio via DRM (Digital Radio Mondiale).

Last week–specifically, on March 15, 2013–I caught about thirty minutes of The Disco Palace broadcast and was able to record it from my Bonito RadioJet IF Receiver. Reception on 17,875 MHz was excellent, although the DRM signal wasn’t quite strong enough for comfortable stereo decoding.

The following TDP recording starts around 2030 UTC (about halfway through the broadcast). Click here to download the recording as an MP3, or simply listen via the embedded player below: