Paul Gibbs
Guest
|
 Posted:
Wed Dec 14, 2005 5:16 pm Post subject:
G729 codec-less gain / volume control |
|
|
Hi all,
Does anyone know if it is possible to change the volume of a G729
recording/stream by changing the GA1/GB1/GA2/GB2 gain fields within each
G729 frame? This would remove a huge overhead in decoding the frame,
increasing the volume and then re-encoding it again.
If it is possible, how should these fields be changed?
Many thanks,
Paul.<>< |
|
Vladimir Vassilevsky
Guest
|
| Posted:
Wed Dec 14, 2005 5:16 pm Post subject:
Re: G729 codec-less gain / volume control |
|
|
Paul Gibbs wrote:
| Quote: | Hi all,
Does anyone know if it is possible to change the volume of a G729
recording/stream by changing the GA1/GB1/GA2/GB2 gain fields within each
G729 frame? This would remove a huge overhead in decoding the frame,
increasing the volume and then re-encoding it again.
If it is possible, how should these fields be changed?
|
Generally is not possible because of the effect on the LTP and STP memories.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com |
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in