Dan Berninger making it happen. “All major operators offer HD voice to at least a segment of direct customer,” Dan writes, ”But there remains no interoperability across operators.” More than a decade ago, Dan, Jeff Pulver and friends convinced everyone in the industry HD voice made phone calls much better.
Broadband allows doubling the frequency range and better codecs improve everything. The additional cost is trivial, something like ten cents/month all in for better mics and network gateways. The gear is so cheap that many phones the last two years include HD. Carriers included Telstra in Australia are turning it on.
The bottleneck: no one carrier could make HD effective. Both ends of the call need to be HD and most calls go from one network to another.