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Discussion Groups | Speech Coding | Changing DPF format in G.729

Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)

  

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Changing DPF format in G.729 - Satheesh P K - Nov 22 10:09:00 2005



Hi all,
The DPF operations in the GSM G.729 codec can be done more efficiently in ARM by directly using Q.31 numbers, instead of converting them to DPF format numbers by calling L_Extract.

But if we do that the results differ from the DPF results by 2 or 3 bits in some cases. This does not affect the speech quality but the bit exactness with the reference code will be lost.

Is this acceptable?

This information would be of great help because we have a very tight schedule in one G.729 project.

Thanks in advance
Satheesh







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