Dynamic RTP/RTCP timestamp validation

Abstract

Network nodes (12, 14, 16, 18, and 20) that exchange time-dependent data in accordance with the Real-Time Transport Protocol subject the timestamps of incoming packets (FIG. 1) to tests that indicate whether the timestamps were likely generated correctly. Such a no de begins an RTP session by determining its output in accordance with the incoming packets' times of arrival. It thereafter bases its output's timing on the incoming packets' timestamps if previously received packets have passed a test (FIG. 5) that indicate their timestamps' reliability. While such a node operates in such a timestamp-based output-timing mode, it continues to test incoming timestamps and assumes operation according to the time-of-arrival mode if too many packets fail the timestamp-reliability test.

Dependencies are inferred from the claim text.