Joseph E Fried

US Patent:

6735192, May 11, 2004

Filed:

Sep 29, 1999

Appl. No.:

09/408771

Inventors:

Joseph Fried - Freehold NJ
Wassim A. Matragi - Brooklyn NY
Behrokh Samadi - Basking Ridge NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04L 1266

US Classification:

370352, 370356, 370493, 370516, 370517

Abstract:

A method and apparatus are disclosed for dynamically adapting the play-out delay for voice packets transmitted over a local area network using the Ethernet standard as an access mechanism. It has been observed that the distribution of voice packet delays in a LAN (shared by voice and data traffic) follows a log-normal distribution. An adaptive algorithm is disclosed to estimate the parameters of the log-normal distribution and to apply a dynamic play-out delay to improve the quality of packetized voice conversations, quantified by minimum delay and packet loss. For example, the size, B, of the play-out buffer can be established to ensure that the packet loss does not exceed one percent (1%). The distribution parameters are continuously updated and the size of the play-out buffer, B, is modified at the beginning of every calibration interval according to the illustrative 99% percentile of the delay distribution.

Author:

Joseph Fried

ISBN #:

0875862489

Author:

Joseph Fried

ISBN #:

0875862497