[M4IF Technotes] Re: how to test MPEG4 AAC encoder

[Ralph Sperschneider]

Dear Vinay,
the only criterium an encoder has to fulfill is that it writes leagal MPEG-4 
access units (in other words: There is no quality criterion).
In order to test this just encode as many different data in as many different 
configurations as feasible for you (as a starting point, you should try to 
generate sequences similar to the conformance test sequences). Then try to 
decode this data with the MPEG-4 reference decoder. Make sure you use the most 
recent version of the reference software, weekly snapshots are available (to 
MPEG members only) on an ftp site of the University of Hannover.
Everything is okay as long as the decoder decodes your data without any dubious 
warning and the decoded waveform sounds as you would expect it. If the deocder 
fails to decode your data, it might have two reasons: Eihter your data is not 
conform, or the decoder is buggy or not fully implemented. If you expect the 
latter, please inform the MPEG-4 Audio reference software development group by 
writing an e-mail to mpeg4_vm   tnt.uni-hannover.de.
Best regards,
Ralph
Vinay K wrote:
> Dear MPEG experts,
> 
>  
> 
> Can any one please tell me how to test the MPEG4 AAC encoder?
> 
> Other than conformance testing, is there any other criteria for testing 
> the encoder?
> 
>  
> 
> Thanks in advance.
> 
>  
> 
>  
> 
>  
> 

-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
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