> When a FM signal may be slightly degraded with static, DAB just gives up entirely.
You'd think that this would be a good scenario for 'hierarchical modulation':
> Hierarchical modulation is particularly used to mitigate the cliff effect in digital television broadcast, particularly mobile TV, by providing a (lower quality) fallback signal in case of weak signals, allowing graceful degradation instead of complete signal loss. It has been widely proven and included in various standards, such as DVB-T, MediaFLO, UMB (Ultra Mobile Broadband, a new 3.5th generation mobile network standard developed by 3GPP2), and is under study for DVB-H.
You'd think that this would be a good scenario for 'hierarchical modulation':
> Hierarchical modulation is particularly used to mitigate the cliff effect in digital television broadcast, particularly mobile TV, by providing a (lower quality) fallback signal in case of weak signals, allowing graceful degradation instead of complete signal loss. It has been widely proven and included in various standards, such as DVB-T, MediaFLO, UMB (Ultra Mobile Broadband, a new 3.5th generation mobile network standard developed by 3GPP2), and is under study for DVB-H.
* https://en.wikipedia.org/wiki/Hierarchical_modulation
Combine that with scalable audio quality:
* https://en.wikipedia.org/wiki/MPEG-4_SLS
* https://en.wikipedia.org/wiki/Bitrate_peeling