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6. Audio Delay: Measurement and Management

Presented by David Hiers, ADP.

This session will focus on audio delay, which is among the most important metrics of conversational quality. It is also among the most difficult to measure and manage. This presentation covers ADP’s efforts to measure and manage full-path, ear-to-mouth audio delay. While commercial devices are available, ADP has developed a low-cost methodology to measure (under certain conditions) one-way and round-trip ear-to-mouth delay performance, irrespective of underlying network technology and topology.

Working with a large cell phone carrier, ADP was able to measure ear-to-mouth delay performance for POTS, Cell, and VOIP networks to the degree necessary to motivate major architectural changes.