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ALSO CALLED: Voice over Internet Protocol, IP Voice, Cable VOIP, VoIP Services, Voice over IP, Voice-over-Broadband, VoB, Voice-over-IP
DEFINITION: A comfort noise generator (CNG) is a program used to generate background noise for voice communications during periods of silence that occur during the course of conversation. CNG is part of the silence suppression or voice activity detection (VAD) handling for VoIP (Voice over IP) technology. The purpose of VAD and CNG is to maintain an acceptable perceived quality of service (QoS) while simultaneously  … 
Definition continues below.
VoIP White Papers (View All Report Types)
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VoIP: How to Plan for the Bandwidth and Calculate the Cost Savings
sponsored by Global Knowledge
WHITE PAPER: VoIP integrated networks are easy to design and the cost justifications are simple to calculate, learn the step-by-step process of how to calculate the potential cost savings of a voice and data integrated network for your organization.
Posted: 03 Apr 2006 | Published: 01 Jan 2005

Global Knowledge

XPI Solutions for Multi-Service/Access: Communications Test Equipment
sponsored by Agilent Technologies, Inc.
WHITE PAPER: This white paper discusses the importance for network operators to have visibility into the voice service quality being delivered to customers over voice-over-IP networks.
Posted: 24 Mar 2004 | Published: 12 Sep 2002

Agilent Technologies, Inc.
151 - 152 of 152 Matches Previous Page    5 6 7    Next Page
VOIP DEFINITION (continued): …  keeping transmission costs and bandwidth usage as low as possible. CNG, in conjunction with VAD algorithms, quickly determines when periods of silence occur and inserts artificial noise until voice activity resumes. The insertion of artificial noise gives the illusion of a constant transmission stream, so that background sound is consistent throughout the call and the listener does not think the line has gone dead. Most conversations include about 50% silence. VAD software allows a data network carrying voice traffic over the Internet to detect the absence of audio and conserve bandwidth by … 
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