Topic: What is 'Triangular Dithering' and what does it do?

[audBall]

SSIA.

I saw this in the lineage of an Electric Apricot show thats currently up on etree.

[Ray76]

This is relevant to dithering...
Triangular dithering
As the high frequencies are percieved less strongly by passing the noise through a
gentle high pass filter and amplifiying it so it has the same ammount of energy we can
still mask the distortion, but make the noise less "loud"
The peak noise is higher - but that peak is
around 20kHz where human hearing is not
very sensitive.
Around the crucial 1-4kHz mark the noise
file:///home/nettings/LAD-2004-AE/slides.xml
24 of 57 06/02/2004 03:42 PM
floor is lower (by about 5dB’s) so we get more audible detail.
This is called triangular dithering because the noise floor slopes upwards.
[rectangular dithered sine], [triangular dithered sine]
Note this only works with audio, and only if you’re not going to mess about with the
frequency components afterwards, as its a psychoacoustic trick

for some good audio information go to

http://www.linuxdj.com/audio/lad/contrib/zkm_meeting_2004/slides/saturday/steve_harris+joern_nettingsmeier-audio_engineering.pdf

[audBall]

This is relevant to dithering...
Triangular dithering
As the high frequencies are percieved less strongly by passing the noise through a
gentle high pass filter and amplifiying it so it has the same ammount of energy we can
still mask the distortion, but make the noise less "loud"
The peak noise is higher - but that peak is
around 20kHz where human hearing is not
very sensitive.
Around the crucial 1-4kHz mark the noise
file:///home/nettings/LAD-2004-AE/slides.xml
24 of 57 06/02/2004 03:42 PM
floor is lower (by about 5dB’s) so we get more audible detail.
This is called triangular dithering because the noise floor slopes upwards.
[rectangular dithered sine], [triangular dithered sine]
Note this only works with audio, and only if you’re not going to mess about with the
frequency components afterwards, as its a psychoacoustic trick

for some good audio information go to

http://www.linuxdj.com/audio/lad/contrib/zkm_meeting_2004/slides/saturday/steve_harris+joern_nettingsmeier-audio_engineering.pdf

Right on...Thanks, Ray.

[Ray76]

This is relevant to dithering...
Triangular dithering
As the high frequencies are percieved less strongly by passing the noise through a
gentle high pass filter and amplifiying it so it has the same ammount of energy we can
still mask the distortion, but make the noise less "loud"
The peak noise is higher - but that peak is
around 20kHz where human hearing is not
very sensitive.
Around the crucial 1-4kHz mark the noise
file:///home/nettings/LAD-2004-AE/slides.xml
24 of 57 06/02/2004 03:42 PM
floor is lower (by about 5dB’s) so we get more audible detail.
This is called triangular dithering because the noise floor slopes upwards.
[rectangular dithered sine], [triangular dithered sine]
Note this only works with audio, and only if you’re not going to mess about with the
frequency components afterwards, as its a psychoacoustic trick

for some good audio information go to

http://www.linuxdj.com/audio/lad/contrib/zkm_meeting_2004/slides/saturday/steve_harris+joern_nettingsmeier-audio_engineering.pdf

Right on...Thanks, Ray.

no prob my man.

 

[audBall]

Damn, just busted open this PDF here (57 pages). 
I've got some serious reading to do....and slow at that.

Anyone up for doing a mod to my reading comprehension? 

[Ray76]

Damn, just busted open this PDF here (57 pages). 
I've got some serious reading to do....and slow at that.

Anyone up for doing a mod to my reading comprehension? 

get out of arizona. back to NC. the heat is making you dumb.

[audBall]

the heat is making you dumb.

..ain't that the truth.  It's amazing how temperature, itself, can influence the way our minds think/work.

back on topic-
So would Tri-Dithering be a better route to take to "mask" clipping as opposed to "compressing" it?
Is it not as lossy?  Or am I in the complete wrong ballpark?