HD Radio is still (annoyingly) covered by patents in a way that open source efforts like nrsc5 still can't be integrated into any OSS radio tooling for fear of

HD Radio is still (annoyingly) covered by patents in a way that open source efforts like nrsc5 still can't be integrated into any OSS radio tooling for fear of litigation. And from my own IANAL research, it seems iffy whether the initial set of patents which is expiring soon are the ones that will open it up... or if any of the many follow up set of patents can keep it out of easy reverse-engineered access :(