[FFmpeg-user] DeckLink Output Controls
erik.dobberkau at gmail.com
Tue Oct 11 08:41:04 EEST 2016
Am Dienstag, 11. Oktober 2016 schrieb Reuben Martin :
> I’m not sure there is a difference between 20 and 24 bit audio (in
> reguards to
> the bit allocation within the signal) since 20 bit is usually padded
> inside of
> a 24 or 32 bit word size.
Both SD and HD SDI video use AES-3 audio for PCM streaming, which again is
20bits by default, but one may occupy the 4 user bits in each frame to
allow for 24bits PCM word length. So yes, the bit allocation is the same
with or without the nibble of the four LSB.
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