After contacting Joan Warner, CEO of Commercial Radio Australia, Jez got this response:
“There are a number of separate causes of delay in the DAB+ digital radio chain from the studio to the multiplexer site.
“Audio encoding delay – 0.3 seconds. (this is the delay for the encoder to turn audio into DAB+ audio.
Service Multiplexer Buffering delay – 0.4 seconds
Service Multiplexer error protection delay – 0.2 seconds
Ensemble Multiplexer Buffering delay – 0.8 seconds
Ensemble Multiplexer error protection delay – 0.8 seconds
Transmission interleaving delay – 0.768 seconds
I think it’s fascinating that they can pinpoint the length of the delay to 1/1000th of a second in regards to the transmission interleaving delay. That’s just nuts.
Head over to AVHub to check out the full response, as well as a fuller rundown on digital radio’s early setbacks.