Delays
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Voice Over IP Delay
Delays
Fixed Delay:
Propagation Delay. Serialization Delay. Processing Delay.
Fixed Delays
Propagation Delay:
Caused by distance. 6 micro second per kilometer.
Serialization Delay:
Caused by clocking the bits on the line. Can be improved by high speed link. Improved by a proper queuing scheme.
Fixed Delays
Processing Delay:
Algorithmic factors such as Codec selection/ Compression / Decompression. Packetization, or the number of samples per packet. To improve the delay, use different codecs , Silence Suppression or VAD
Delays
Variable Delay:
De-jitter Buffers. Queuing Delays. Wan Delays
Variable Delays
De-jitter Buffers:
Buffering delay Play 1st “talk spurt” when next packet in sequence is most likely to come.
Queuing Delay:
In case of congestion. Need to provide queuing Priority.
Variable Delays
WAN / Service Provider Delay.
Network delay, caused by the type of link.
Delays
Fixed Delay:
Propagation Delay. Serialization Delay. Processing Delay.
Fixed Delays
Propagation Delay:
Caused by distance. 6 micro second per kilometer.
Serialization Delay:
Caused by clocking the bits on the line. Can be improved by high speed link. Improved by a proper queuing scheme.
Fixed Delays
Processing Delay:
Algorithmic factors such as Codec selection/ Compression / Decompression. Packetization, or the number of samples per packet. To improve the delay, use different codecs , Silence Suppression or VAD
Delays
Variable Delay:
De-jitter Buffers. Queuing Delays. Wan Delays
Variable Delays
De-jitter Buffers:
Buffering delay Play 1st “talk spurt” when next packet in sequence is most likely to come.
Queuing Delay:
In case of congestion. Need to provide queuing Priority.
Variable Delays
WAN / Service Provider Delay.
Network delay, caused by the type of link.
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