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- Jan 25, 2010
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Hi,
I am using iLBC codec on my iPhone and noticed it is using the 30ms frame length.
The advantage of encoding every 30ms is that the encoded data rate is lower: 13.33 kbit/sec as opposed to 15.20 kbit/sec for 20ms frames. However, encoding every 30ms leads to 50% more delay in the received speech, which can cause undesirable latency.
What did 3CX decide to use the 30ms codec and not the 20ms codec?
I am using iLBC codec on my iPhone and noticed it is using the 30ms frame length.
The advantage of encoding every 30ms is that the encoded data rate is lower: 13.33 kbit/sec as opposed to 15.20 kbit/sec for 20ms frames. However, encoding every 30ms leads to 50% more delay in the received speech, which can cause undesirable latency.
What did 3CX decide to use the 30ms codec and not the 20ms codec?