[X4U] convert audio format:CCITT G.726 32 Kbps (4 bits ADPCM, 8 kHz)

[John McDaniel]

On Nov 18, 2004, at 2:12 PM, silvo conticello wrote:

> G.729 can be input and output to Barbabatch, and it can be played 
> back, but Barbabatch requires the filename extension .729 in order to 
> recognize it at the input.
> All other CCITT types can be output from BarbaBatch, not used as input.


There are a number of file formats that are headerless. Without header 
information to indicate sample rate, bit depth, encoding algorithm, 
etc., a playback program has no information to go on about how to play 
back the file.

In the telecommunications biz, the playback parameters are set up for a 
particular implementation within the playback software/device and 
therefore headers are not needed. BUT, in the case of applications like 
BarbaBatch, lacking a header (or having incomplete header information) 
leaves the application not knowing what to do. Therefore the need to 
use special filename extensions. In the case of Dialogic format files, 
BarbaBatch requires specific extensions to tell it how to playback the 
file. After you are done with processing, you have to change all of the 
extensions back to ".vox" which is the generic Dialogic file extension.

Does that make sense?

Let me know if I can help more.

j mcd

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John McDaniel      johnmcd at one.net
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