[Mp4-tech] Mpeg4 AAC + conformance criteria for PNS

[Shreya Pathak]

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Hello All,
I wanted to know the conformance criteria for testing PNS in Mpeg4 AAC.
I dont have any document consisting of test criteria for PNS.I am in urgent need of it.Please tell me about conformance criteria for PNS.I have PNS test vectors with me.
Regards
Shreya
On Thu, 04 Nov 2023 sakthi  narayanan wrote :
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> >hi all ,
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>Iam working on audio domain.I just want some information abt streaming from u. can u tell,how to extract the audio & video contents from mpeg-4 file .
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>    I'll extract the video content from mp4 file based on video offset &>samples per chunk.I'll skip raw data from mp4 file ,when the data belongs to the hint offsets.but its not working for some files.
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>    and also I extracted the audio content(raw data) properly from mp4 file based on offset address.Its working fine for all files.But, still iam having doubt on headers.Some of them told that,there is no header in raw bitstream.
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>    I decoded my extracted audio data(.aac) using FAAD decoder.It decodes properly.I feel that,the .aac file not contains header.
>but, when i deleted the starting data (20 bytes) from .aac file,the FAAD decoder was not able to decode properly.and every .aac starting file contains 210C FFFF bytes.
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>     I want to clear, whether there is any header for aac in mp4 file or
>  not.Please,clear my doubts and give some good suggestions.
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>Kindly,give me an immediate reply for this mail.
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>With regards
>Sakthi
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