Jitter buffer adjustment algorithm

US6747999B1 · kind B1 · utility

Assignee

• Siemens Information and Communication Networks, Inc. · US

Inventors

• Mark Grosberg · Boca Raton, US
• Mark J. Flanagan · Dallas, US
• Kristin Butcher · Deerfield Beach, US
• Jeff Cripe · Boynton Beach, US

Key dates

• Filing date: Nov 15, 1999
• Grant date: Jun 8, 2004
• Expiry date: Nov 15, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J3/0632
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A jitter buffer controller (110) allows the depth of the jitter buffer (113) to be adjusted dynamically according to the varying jitter of the current sequence. The jitter buffer controller (110) maintains a cache (109) of previous jitter values. This cache contains exponentially averaged values that represent the long-term behavior of specific destination's jitter characteristics, i.e., a jitter characteristic memory. These values are used to initialize the jitter buffer's depth. The jitter cache prevents the buffer's depth from being initialized with an arbitrary value that disregards the specific destination's jitter characteristics.