[Mp4-tech] Mp4-tech][Audio] Error calculation MPEG4 AAC LC Decoder output PCM samples

mallikarjun rao gbmallikarjunarao yahoo.com
Tue Feb 8 05:32:05 ESTEDT 2005


Hi Everybody,
This is Mallikarjun. I downloaded some test vectors from the site: http://www.iso.org/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_14496-4_2000_Conformance_Testing/CONFORMANCE_BITSTREAMS_CD2/AUDIO/GA/AAC_LC/
After running those test vectors , i got  some out put PCM files.
where is the reference PCM file to compare my output PCM file?
There are some .PCM files are available in the same (test vector) folder.
they are not comparable to my output file.
if play my output file using some tool (cool edit), it is playing. It is same as that , when .AAC file playing using winamp.
 If we play .PCM file which is available in test vectors folder , using cool edit , it is not playing well. Noise is coming.
where is the reference .pcm files for compare my decoder output file bit by bit?
[1. otherwise  is there any standred encoder (.exe file) readily available to generate mpeg4 aac file for a given  input .pcm file.
 2. is there any standred decoder (.exe file) readily available to generate  .pcm file for compare my output file.
3. is there any MPEG4 AAC LC decoders available like LAME or Oog..? if yes where they are available? is it (possible) right, compare the output of these decoder output files with my decoder output files?]
please respond immediately.
i need information,  how should i get reference .pcm file to compare my decoder output .pcm  file.
please reply asap.
Thanks
Mallikarjun
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