i2s format and PCM format

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i2s format and PCM format

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jamesdeepu
Contributor II

Can someone explain what is the difference between I2S interface and PCM interface. Does I2S interface only supports i2s format audio data and not PCM format audio data ?

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Yuri
NXP Employee
NXP Employee

Hello,

  Basically : I2S is interface, PCM is a digital representation of an audio signal.
"I2S, also known as Inter-IC Sound, Integrated Interchip Sound, or IIS, is an electrical serial bus
interface standard used for connecting digital audio devices together. It is used to communicate PCM
audio data between integrated circuits in an electronic device."


Have a great day,
Yuri

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4,233 Views
Yuri
NXP Employee
NXP Employee

Hello,

  Basically : I2S is interface, PCM is a digital representation of an audio signal.
"I2S, also known as Inter-IC Sound, Integrated Interchip Sound, or IIS, is an electrical serial bus
interface standard used for connecting digital audio devices together. It is used to communicate PCM
audio data between integrated circuits in an electronic device."


Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

4,232 Views
jamesdeepu
Contributor II

Dear Yuri,

Thanks for your reply.!!..

So there is nothing like PCM interface ?

Can you explain I2S audio format too?

Thanks in advance.

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4,232 Views
Yuri
NXP Employee
NXP Employee

Hi,

Please look at sections 3.1 (General PCM Codec)  and 3.2 (I2S) of the following

app note :

http://cache.freescale.com/files/microcontrollers/doc/app_note/AN2979.pdf

Regards,

Yuri.

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