Cancel
Showing results for 
Search instead for 
Did you mean: 

What's the difference ? - SPDIF vs SPDIF (No HMS)

Experimenter
Experimenter

What is SPDIF (No HMS) and SPDIF on VS8-E input card?

 

 

spdif.png

 

 

 

4 REPLIES
Highlighted

Re: What's the difference ? - SPDIF vs SPDIF (No HMS)

Siemens Valued Contributor Siemens Valued Contributor
Siemens Valued Contributor

The acronym SPDIF stands for Sony Philips Digital Interface Format and is an interface to transmit digital audio. Sony and Philips corporations developed it and it was standardized in IEC 60958 . Transmitting the audio in digital format ( i.e 0s and 1s ) results in higher quality audio because it does not have the same level of noise as an analog audio signal.  

 

Furthermore, some binaural Head Measuring Systems (HMS) use SPDIF formats and sometimes encode calibration and other information related to the audio measurements:

  • SPDIF (No HMS) - Therefore, if you are not using a HMS, but are using digital audio, you would select SPDIF (No HMS) mode.
  • SPDIF - If you are using a digital binaural HMS, make sure it is broadcasting the encoded information by pressing the F3 key on the remote.
  • Single Ended - Is for an analog or ICP transducer

 

The connector type often utilized with a SPDIF interface is a stereo RCA cable like shown below. Two channels of data are carried over one SPDIF connection.

SPDIF RCA cable.png

 

 

Instead of RCA cables, sometimes fiber optical cables are used with TOSLINK connectors.

On the SCADAS, the digital audio is fully synced with all the analog channels. This mode is only available on the 8th input channel of the VS8-E card. The SCADAS XS has a dedicated SPDIF input connection.

Re: What's the difference ? - SPDIF vs SPDIF (No HMS)

Your explaination really helped me understand the difference between SPDIF vs SPDIF (No HMS)

Re: What's the difference ? - SPDIF vs SPDIF (No HMS)

Experimenter
Experimenter

Thanks for the clear explanation !

Re: What's the difference ? - SPDIF vs SPDIF (No HMS)

Siemens Phenom Siemens Phenom
Siemens Phenom

To read the settings of a digital binaural head through the SPDIF connection, in Simcenter Testlab Signature, go to the Measure worksheet.

 

Select Ranges (F3 key shortcut) and select Digital (F10 shortcut).  Press the "Read HMS" button.  

 

spdif_working.png

 

 

If successful, your screen should look similar to above (your ranges and equalization state may vary).