Peter Lennox wrote:
Basically, stereo intrinsically features cross-talk; listening over headphones removes this.
So putting it back in, via some kind of Blumlein shuffling, fixes that. if you want externalisation, you need some room effect (artificially generated or whatever). So you can have 'stereo-via-headphones', it's just a case of subtlety.
Dr Peter Lennox
School of Technology,
Faculty of Arts, Design and Technology
University of Derby, UK
e: p.len...@derby.ac.uk
t: 01332 593155
Problems of listening to stereo via headphones is not just related to
crosstalk. (Which might not be some "natural thing" in the first place.)
Binaural representation suffers because of HRTF questions, head
movements, "maybe" other factors.
In fact, aren't most problems are already discussed/solved, but awaiting
commercialization?
Hint:
http://smyth-research.com/
We had this discussion before, at least I have some strange déjà vu
feeling here... :-)
Best,
Stefan Schreiber
________________________________________
To: Surround Sound discussion group
Subject: Re: [Sursound] Patent application: Data structure for HOA
On 1 Nov 2012, at 23:07, Stefan Schreiber <st...@mail.telepac.pt> wrote:
The next and valid question is if stereo via headphones actually works so well at all...
(Many people have problems, such as in-head effects, lack of perceived "real
space", etc.)
If you would fix these problems, then you could probably also reproduce
convincing binaural surround via headphones.
Of course stereo doesn't work through headphones! That's why there's a
difference between stereo and binaural, because stereo assumes speakers being
IN FRONT of the listener, not perpendicularly left and right of the listener.
That's why there are head phone processors which in essence transcode regular
stereo into binaural stereo.
Sennheiser sold such a processor for a while, I still have it somewhere. It worked rather
well, except that the electronics were of inferior quality using cheap, low-power
components. So then I had the choice of listening to super-clean audio from my Metric
Halo headphone output, but have "in head" stereo, or to listen to grungy, muddy
sound, with the proper sound stage.
That's also EXACTLY why UHJ needs to be decoded to binaural, because being
stereo compatible, without decoding it works just as well or just as badly as
regular stereo works on headphones.
A mobile device music player app can solve these issues for both UHJ and
regular stereo by doing the proper binaural decoding/transcoding, and since
it's an app and not a hardwired appliance, it's easy to let users select
different HRTF in the app's preferences, or even let advanced users load
personalized HRTFs.
Ronald
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