[Mp4-tech] [Mpeg4 AAC] regarding PNS block in Mpeg4 AAC decoder

Shreya Pathak shreya_pathak rediffmail.com
Wed Oct 20 10:31:31 EDT 2004


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Hi Ralph, 
    I have developed reference software for Mpeg4 AAC LC Decoder and i have downloaded the test vectors from this site.
http://www.tnt.uni-hannover.de/project/mpeg/audio/
and here i am able to pass all the test vectors except for PNS.
al18_08.mp4 and al19_08.mp4 are not passing.I get different values as compared to the reference output given in al18_08.wav and al19_08.wav
  When I decoded the same test vectors using the publicly available source code faad, there also its giving a difference between values.
So I am not able to compare also where am I wrong ?
Regards
Shreya
On Wed, 20 Oct 2023 Ralph Sperschneider wrote :
>Shreya Pathak wrote:
>
>>Hi,
>>In my reference Mpeg4 AAC LC decoder software, i am able to pass all the test vectors except PNS test vectors.
>>
>What exactly is your problem?
>
>-- Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
>Fraunhofer IIS                  | Fax:   +49 9131 776 67 344
>Am Wolfsmantel 33               | mailto:ralph.sperschneider iis.fraunhofer.de
>D 91058 Erlangen                | http://www.iis.fraunhofer.de/amm/
>
>
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