The Defense Advanced Research Projects Agency (DARPA) is pursuing a universal codec that would allow military radios, satellites, and data networks to adapt how they protect transmissions from errors.
Through a special notice, the agency announced the Leveraging Universal Codecs (LUC) program, which seeks to develop a next-gen encoder-decoder pair capable of adapting to different error-detection and correction methods during data transmission.
The effort builds on DARPA’s earlier Guessing Random Additive Noise Decoding (GRAND) research, which works by reverse-engineering interference in a transmission channel to reconstruct the original signal.
Under the LUC program, a GRAND-based decoder will be paired with a new adaptive encoder capable of automatically selecting the most effective error-protection method based on signal conditions and mission priorities in real time.

DARPA said the approach could improve bandwidth efficiency, make adaptable coding methods more difficult to exploit, and allow data to move more reliably across different military communications systems.
Unclassified Push
DARPA plans to keep the LUC program unclassified to make the resulting technology more accessible to both military and commercial users.
However, the effort will operate under a Controlled Unclassified Information ceiling, allowing the agency to manage sensitive details with baseline security protections.
Companies selected for the effort will be free to choose which communication systems they integrate the codec into, but they are expected to demonstrate how their approach contributes to the broader technology.
DARPA also stressed that the special notice is intended solely for program planning and is not a formal solicitation for proposals.