[Mp4-tech] Re: [Audio] aacPlus Synchronization with MPEG4 Video

[Ralph Sperschneider]

Dattaguru B.N. wrote:
> Dear Ralph,
>
> Thanks for the input.
> I want to know the same information for enhanced
> AACPlus (HE AAC v2) streams also.  Is there any source
> available for the same?
>
> Thanks in advance,
> Datta
>   

Dear Datta,
please note that the issue is generically considered in the mentioned 
Cors. Hence, no further codec specific descriptions / explanations are 
required.
Best regards,
Ralph
> --- Ralph Sperschneider
> <ralph.sperschneider iis.fraunhofer.de> wrote:
>
>   
>> Dattaguru B.N. wrote:
>>     
>>> Dear Experts,
>>>
>>> I have some questions on synchronization of audio
>>>       
>> and
>>     
>>> video:
>>>
>>> 1.  How do we synchronize AAC Audio and MPEG
>>>       
>> video?
>>     
>>> 2.  Will AAC+ synchronization with MPEG video
>>>       
>> differ
>>     
>>> from
>>>      that of AAC.  If so,  what is the delay and
>>>       
>> how
>>     
>>> to take 
>>>      care of the same.
>>>
>>> 3.  If I perform a jump in between the decoding
>>> skipping some
>>>      frames,  how can I achieve sync and also in
>>>       
>> case
>>     
>>> of SBR,
>>>      how can I get the previous information for
>>> decoding the 
>>>      current frame?
>>>
>>> Thanks in advance for your valuable inputs.
>>> Waiting for your answers.
>>>
>>> Thanks and regards,
>>> Datta
>>>
>>>   
>>>       
>> Dear Datta,
>>
>> the issues you refer to are addressed by MPEG in the
>> following documents:
>>
>> ISO/IEC 14496-1:2004/COR1
>> ISO/IEC 14496-3:2005/COR4
>>
>> Note: Corrigenda are available at the ISO web store
>> free of charge.
>>
>> If you are an MPEG member, you can have a look into
>> N6798 for a more 
>> elaborative description.
>>
>> Best regards,
>> Ralph
>>
>> -- 
>> Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131
>> 776 344
>> Fraunhofer IIS                  | Fax:   +49 9131
>> 776 398
>> Am Wolfsmantel 33               |
>> mailto:ralph.sperschneider iis.fraunhofer.de
>> D 91058 Erlangen                |
>> http://www.iis.fraunhofer.de/amm/
>>
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>   
>
>
>
>  
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-- 
Dipl.-Ing. Ralph Sperschneider  | Phone: +49 9131 776 344
Fraunhofer IIS                  | Fax:   +49 9131 776 398
Am Wolfsmantel 33               | mailto:ralph.sperschneider iis.fraunhofer.de
D 91058 Erlangen                | http://www.iis.fraunhofer.de/amm/