FreeDV aims to bring open-source HF digital voice into the mainstream

ARDC grant will fund development, documentation, and promotion of this important open-source amateur radio technology
SAN DIEGO - March 7, 2023 - PRLog -- To advance the state of the art in HF digital voice and to promote its use, Amateur Radio Digital Communications (ARDC) has awarded $420,000 to the FreeDV Project. With this grant, the FreeDV Project team will:

* Hire experienced digital signal processing developers to work with the volunteer staff to improve speech quality and improve low signal-to-noise ratio operation, making FreeDV performance superior to single-sideband (SSB) over poor high-frequency (HF) channels.
* Work with commercial HF radio companies to embed FreeDV into at least two commercial radios, greatly reducing set up effort and reducing latency.
* Continue development of a suite of advanced, open-source HF modems, with the goal of making FreeDV's digital performance comparable to VARA at both low and high signal-noise ratios.
* Continue support of the existing software library (libcodec2) and application software (freedv-gui), and embedded FreeDV adaptors (SM1000 and ezDV).
* Better promote FreeDV online and in person at amateur radio clubs and conventions.

The FreeDV Project team believes that the work funded by this grant will:

* Open the path to widespread adoption of a truly open-source, next-generation digital voice system for HF radio.
* Provide a mature, open-source low-bit-rate codec useful for a variety of amateur radio and commercial applications.
* Provide a suite of high performance, HF data modems for open-source data applications usable by any radio amateur.

About FreeDV
FreeDV is a low-bit-rate digital voice mode for HF radio. FreeDV is open-source software, released under the GNU Lesser Public License (LPGL) version 2.1. The modems and Codec 2 speech codec used in FreeDV are also open source. Hardware and software developers can integrate FreeDV into their projects using the FreeDV API.  To learn more about FreeDV, go to

About ARDC
Amateur Radio Digital Communications (ARDC) is a California-based foundation with roots in amateur radio and the technology of internet communication. ARDC makes grants to projects and organizations that follow amateur radio's practice and tradition of technical experimentation in both amateur radio and digital communication science. Such experimentation has led to advances that benefit the general public, including the mobile phone and wireless internet technology. ARDC envisions a world where all such technology is available through open source hardware and software, and where anyone has the ability to innovate upon it. To learn more about ARDC, go to

Dan Romanchik, KB6NU
Amateur Radio Digital Communications
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