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Background Info on Spatial Audio

Steve Fisher
Prodigy 40 points


Hi 

I'm trying to find out more on spatial audio. More on teh background rather than the TI products. Can anyoen recommedn any background reading ?

In particular i was interested in the requirements/applications for daisy chaining 4 spatial arrays and driving (say) 14) speaker outputs rather than 16 (as mentioned in the video). Is the capability aimed at specific current applications or made available for one's imagination to fill the gaps?

BTW I posted here as the e2eaudio page was not accessible when I tried to go there. 

Thanks & Rgds

Steve 

  • 0
    TI__Guru**** 189401 points

    Hi, Steve,

    That's odd. I just moved your post to the Audio Amplifier forum.

    -d2

  • 0 in reply to Don Dapkus
    Prodigy 40 points

    Hi

    Thanks for putting this in the correct forum. FYI I was following  a link from inside a PDF and that failed. I haven't used the forums that often up to now and couldn't identify the best one.

    Rgds

    Steve

  • 0
    TI__Prodigy 185 points

    From an application standpoint - we see interest in a lot of applications requiring the daisy chaining feature.  Speaker bars, laptops, docking stations, automotive,  TV, computer monitors all benefit from spatial audio - and can sometimes fit more (smaller) speakers in a linear array.

    The reason for the flexibility in 16, 15, 14 speaker channels wasnt driven by a specific application -  I was more a realization that not every application allows for as many speakers as the audio designer would like -  there may be other hardware in the way or the device is too thin or too small to fit any more speakers.   Our solution will calculate the best performance based on whatever quantity of speakers is available (2.1-16) - and we assume this choise is driven by the size of the application.

    Also, it allows customers to use our solution in a family of products.  Maybe 4 speakers in the smallest product.  8 speakers in the medium sized product.  And 12 speakers in the large product.  All with bacially the same effort in tuning the audio effect.

     

    In terms of background

    if you are looking for information on how we achieve the effect -  our solution is based on

    1. Audio beamforming

    2. Crosstalk cancellation

    3. HRTF - head releated transfer function

    There are many articles on the web that discuss these topics.

     

    Eric Eklund

     

     

  • 0 in reply to Eric Eklund
    Prodigy 40 points

    Erik

    Thanks for the info, will look on the web as you suggest

    Steev

  • 0 in reply to Steve Fisher
    Intellectual 390 points

    Hello Steve,

    Perhaps you will get this message, but since the date of your last post, I have published this general article on EETimes AudioDesignLine at the beginning of January 2012. .  The link is as follows:

    http://www.eetimes.com/design/audio-design/4233781/Generating-spatial-audio-from-portable-products---Part-1--Spatial-audio-basics?Ecosystem=audio-design

    Part 2 will follow probably in a week or so.  Perhaps this will help you for some general info.

    Kind regards,
    Ken Boyce

  • 0 in reply to Kenneth Boyce
    Prodigy 40 points

    Thanks Keith, I wasn't aware of your article. I will track it down

    Rgds

    Steve

  • 0 in reply to Eric Eklund
    Intellectual 710 points

    Hi Eric,

    Is there spatial audio solution for headphones?

    Thanks and regards,

    poh boon