[Mp4-tech] audioMPEG4

[Noor Othman]

Hi everyone,
  I really need someone's help over here. I have chosen lpc at 3850 
bitrate, I wonder why there are extra number of samples after the 
encoder. For example in my input audio file there are 89344 samples, and 
the output is 89624. Fair enough I could see  that in AFreadData.c it is 
said that zeros are filled at the beginning and at the end of the 
samples buffer. I wonder, what are the purpose of these zeros being 
added. Then, after passing this encoded audio file into the decoder, the 
number of samples has reduced to 89600. By the way, the number of 
samples per frame for this bitrate is 320, so assume that, the 24 
samples in the last frame is not counted. Please, I need some insights. 
And I wonder if this additional samples will affect the anything... or 
is this has to do with CELP coding... please, please, please, help me.
Noor