Dynamic RTP/RTCP timestamp validation
US6687752B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2000 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Mar 1, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.