Response time measurement for adaptive playout algorithms
AssigneeNokia Corporation
InventorDavid Leon
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Abstract
The present invention discloses a system which comprises two endpoints (1, 2) communicating with each other by means of a packet-switched network. The endpoints (1, 2) use adaptation algorithms for estimating jitter from packet arrival times and for modifying silence period lengths according to the latest estimate. According to the present invention, the endpoints (1, 2) are able to measure a response time (ρ) at a certain point of time and use it as a parameter in the adaptation algorithms.
Claims7
A system comprising two endpoints (1, 2) communicating with each other by means of a packet-switched network, said endpoints (1, 2) using adaptation algorithms for estimating jitter from packet arrival times and for modifying silence period lengths according to the latest estimate, wherein said endpoints (1, 2) are able to measure a response time (ρ) at a certain point of time and use it as a parameter in the adaptation algorithms.
A method for measuring a response time (ρ) between two endpoints in a packet-switched network system, comprising the steps of:
- sending (S1) a response time request packet from a first endpoint (1) to a second endpoint (2) at a time sr;
- receiving (S2) the response time request packet at said second endpoint (2) at a time rr;
- sending (S4) a response time indication packet from said second endpoint (2) to said first endpoint (1) at a time si;
- receiving (S5) the response time indication packet at said first endpoint (1) at a time ri;
- and
- computing (S6) the response time (ρ) on the basis of the sending and receiving times in said first endpoint (1).
Dependencies are inferred from the claim text.