Digital sound communication

From Helpful
(Redirected from S/PDIF)
Jump to: navigation, search
This article/section is a stub — probably a pile of half-sorted notes, is not well-checked so may have incorrect bits. (Feel free to ignore, fix, or tell me)


Typically external

S/PDIF

http://en.wikipedia.org/wiki/S/PDIF


AES3

ADAT

Typically internal

I2S

(Note there is no relation to I2C)

I2S (sometmimes IIS), Inter-IC Sound is meant to standardize PCM data between closeby chips.

As I2S doesn't spec a plug, or how to deal with longer cables (impedance and such), it is typically only used between components within a device.


Technically:

  • lines are: bit clock, left-right clock, data, ground
Separating clock and data means somewhat lower jitter (and indirectly latency) than buses that don't.
in applications often a little more[1]
~2.4V threshold so can be used in 3.3V
  • PCM data
16, 24, or 32-bit
mono or stereo
8kHz to 192kHz (verify)


https://en.wikipedia.org/wiki/I²S

On DACs