Found this post in ba.broadcast:
"NPR story on HD radio startup"
"Problems with the system that pervade the entire HD/IBOC data and codec from beginning to end, all the way to the signal on the air persist. The codec, by today's standards, is grossly inferior on FM and literally unspeakable on AM (gee, I had no idea). Since they're hardwired into the receivers, they won't be changed anytime soon, if ever."
"But it goes beyond that. There were bad choices of network layer such that reliability is compromised. The code used in exciters has a severe memory leak, so the exciters crash routinely. The receivers can be locked up solid by malformed packets, requiring a power cycle to restore operation. The list goes on and on and on."
"Will any of this get fixed? Probably not, since all the money right now is going to promotion, not to technical bug fixes. This is a system that has been in development for a decade and a half, and it still has problems from beginning to end that range from audio encoding, through the transport layers, to the encoding, and now, with the spectral regrowth problems, to the broadcast bands themselves; you know...that which is supposed to be serving the public. I would love to be implementing digital radio. But this is garbage."
-- John Higdon +1 408 ANdrews 6-4400
\ \\i\
\\y\\u\
\\l.\\c\\o\\m/2kbzsn
Unfortunately, with these very serious on-going technical issues, lackluster HD sales, and the up-coming broadcaster royality rates for the HD channels, I really don't see how HD is ever going to be successful. There is even an HD defector who broke of from the CPR board in Vail because of the potential move to HD:
westword.\\c\\o\\m/2007-06-14/news/going-public/
"NPR story on HD radio startup"
"Problems with the system that pervade the entire HD/IBOC data and codec from beginning to end, all the way to the signal on the air persist. The codec, by today's standards, is grossly inferior on FM and literally unspeakable on AM (gee, I had no idea). Since they're hardwired into the receivers, they won't be changed anytime soon, if ever."
"But it goes beyond that. There were bad choices of network layer such that reliability is compromised. The code used in exciters has a severe memory leak, so the exciters crash routinely. The receivers can be locked up solid by malformed packets, requiring a power cycle to restore operation. The list goes on and on and on."
"Will any of this get fixed? Probably not, since all the money right now is going to promotion, not to technical bug fixes. This is a system that has been in development for a decade and a half, and it still has problems from beginning to end that range from audio encoding, through the transport layers, to the encoding, and now, with the spectral regrowth problems, to the broadcast bands themselves; you know...that which is supposed to be serving the public. I would love to be implementing digital radio. But this is garbage."
-- John Higdon +1 408 ANdrews 6-4400
\ \\i\
\\y\\u\
\\l.\\c\\o\\m/2kbzsn
Unfortunately, with these very serious on-going technical issues, lackluster HD sales, and the up-coming broadcaster royality rates for the HD channels, I really don't see how HD is ever going to be successful. There is even an HD defector who broke of from the CPR board in Vail because of the potential move to HD:
westword.\\c\\o\\m/2007-06-14/news/going-public/

















Bottom line: the auto industry is, was, and always will be "our bitch". EVERY new form of terrestrial radio will be in the dashes of America's cars. It's just a matter of whose arm must be twisted (or who must be bribed) first. We're still VERY early in the introduction of HD radio. The freakin' rules have just been finalized for God's sake! We are officially still in the experimental phases of a VERY new technology, which is still taking shape.

