Quote:
Originally Posted by FranceBB
AC3 has been a good and reliable codec for ages but it needed an high enough bitrate, something like 320-384 kbit/s to sound really good and now there's AC4... How is it gonna be compared to AAC at no so high bitrates like 128-192 kbit/s...
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If I had to guess, I reckon it's more likely that AC4 coding technology is derived from E-AC-3, which works much more efficiently at lower bit-rates than AC-3...
From Dolby's blog [2017]:
Hearing Is Believing: Comparing Dolby AC-4 to Dolby AC-3