[FFmpeg-devel] [PATCH] Common ACELP code & G.729 [4/7] - G.729 core

[Benjamin Larsson]

Michael Niedermayer wrote:
>> 4400 mode is (i assume) Chinese extension of G.729. it is not covered
>> by official specification.
>> And since i have no samples i can't test it. This is why i put those comment.
>>     
>
> What makes you think this format even exists?
> Is there any source code for a decoder?
> Or a specification?
> Or is it mentioned in any manual for any hardware?
> Iam just a little curious where this stuff comes from ...
>
>   

This comes from Chinese portable media players capable of recording .act 
files(the same players are most likely also able to play .amv files), 
the only thing that can play these kind of files is a windows application.

http://wiki.multimedia.cx/index.php?title=ACT

MvH
Benjamin Larsson