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AM-HD

C

Clayton Douglas

I assume AM-HD will not have an HD2 channel to use for programming. then, what are the advantages of an AM station going to HD? better audio quality and the ability to transmit text ads/ info?
 
Clayton Douglas said:
I assume AM-HD will not have an HD2 channel to use for programming. then, what are the advantages of an AM station going to HD? better audio quality and the ability to transmit text ads/ info?
Click to expand...

I posed a similar question to Tom Ray on this board a few months ago. Here was his reply:

"This talk by iBiquity of eventually splitting HD-AM into two digital program streams, have you looked into this at all? Can this be done and still fit an analog channel and data streams into the narrow bandwidth of an AM channel or would this spill over into the first adjacents and by how much? What kind of audio quality are we looking at for the digital channels?

>>>>> 36KB is still 36KB, so yes, it will still fit in the allocated space. However, the main HD channel would then become 50-15kHz mono, 20KB, with the remaining channel to be 12-16KB. It would be good for a voice channel, ie, reading for the blind or something like that. Of course, as things progress and codecs continue to improve, someone will figure out a way to cram a higher quality signal into that 12-16KB space.

Tom Ray"

db
 
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