[Mp4-tech] AAC - PNS - Testing

[S. R. Quackenbush]

AAC - PNS - TestingIf you are developing an MPEG-4 AAC profile decoder, then
it must process PNS. As to the type of random noise generator, the exact
type is neither stated nor constrained, so you can choose one that fits your
complexity tradeoff. An finally for performance/complexity: I don't know of
any tests showing the performance of just the PNS tools (i.e. on vs off),
but the complexity of PNS in the decoder is very low (some lines of program
code and a few multiplies per PNS sample.
Schuyler Quackenbush
---
Schuyler Quackenbush    Chair, MPEG Audio Subgroup
CEO, Audio Research Labs
336 Park Ave, Suite 200, Scotch Plains, NJ 07076
phone: 908 490 0700     srq audioresearchlabs.com
fax:   908 842 9151     www.audioresearchlabs.com
  -----Original Message-----
  From: mp4-tech-bounces lists.mpegif.org
[mailto:mp4-tech-bounces lists.mpegif.org]On Behalf Of Kannan GS Nambiar
  Sent: Monday, August 04, 2023 7:28 AM
  To: 'mp4-tech lists.mpegif.org'
  Subject: RE: [Mp4-tech] AAC - PNS - Testing
  Hi All,
  A small correction to my previous query.Instead of Quality improvement in
my 2nd line, please read it as Compression Improvement.Sorry for the
trouble.
  Regards
  Kannan
    -----Original Message-----
    From: Kannan GS Nambiar [mailto:kannan.g.s.nambiar celstream.com]
    Sent: Monday, August 04, 2023 4:02 PM
    To: mp4-tech lists.mpegif.org
    Subject: [Mp4-tech] AAC - PNS - Testing
    Hi All,
    I would like to get some info regarding the tradeoff between Utilization
and processor power required for Perceptual Noise Substitution (PNS) as used
in MPEG 4 AAC.Here by  Utilization I mean the Quality improvement of audio
by using PNS.
    I would also like to get some info on testing PNS.In case testing is
going to take more time for the probable quality addition, I was wondering
whether I can opt out of using PNS.Is there a correct way of generating the
Random numbers,or can we define our own method???There was no mention to be
seen regarding this in the standard.
    Thanks and Regards,
    Kannan
-------------- next part --------------
An HTML attachment was scrubbed...
URL: /pipermail/mp4-tech/attachments/20030804/4c434d06/attachment.html