Comfort Noise Generator is a small program that resides within ATA and other VoIP products, and is used to generate noise during packetized voice conversation (VoIP calls).
The program purposely generates noise or a tone during a conversation in order to simulate the regular noise used in "normal" PSTN lines, caused by the TDM circuit. In TDM, there is always some background noise even when nobody is talking. Program or Programme may refer to: Computer program Radio programming Television program(me), Webcast Program (management) 12-step program Program (The Animatrix), a short film in The Animatrix series Event programme British tabloid form of comic book, called prog in short. ... ATA stands for: Advanced Technology Attachment: computer disk drive interface standard Air Transport Association of America Air Transport Auxiliary of Royal Air Force Atlantic Treaty Association Alberta Teachers Association: the public teachers union for the province of Alberta, Canada Allegheny Trail Alliance: a group of seven rails to trails... IP Telephony, also called Internet telephony, is the technology that makes it possible to have a telephone conversation over the Internet or a dedicated Internet Protocol (IP) network instead of dedicated voice transmission lines. ... The word tone is used in several different fields with different meanings. ... The public switched telephone network (PSTN) is the concatenation of the worlds public circuit-switched telephone networks, in much the same way that the Internet is the concatenation of the worlds public IP-based packet-switched networks. ... TDM is a three-letter acronym that may refer to: Time-division multiplexing, a method for sending multiple digital signals along a single telecommunications transmission path Therapeutic drug monitoring, a branch of clinical chemistry Tucker Death Mix, a cocktail drink In the game Far Cry, Team Death Match, a multiplayer... TDM is a three-letter acronym that may refer to: Time-division multiplexing, a method for sending multiple digital signals along a single telecommunications transmission path Therapeutic drug monitoring, a branch of clinical chemistry Tucker Death Mix, a cocktail drink In the game Far Cry, Team Death Match, a multiplayer...
People are often disturbed when they hear nothing while talking on the phone, and this is why the CNG was developed.
In modern VoIP products, users may control whether they want CNG enabled or disabled.
A device for generatingcomfortnoise according to claim 19 wherein said comparator is adapted to determine that a signal sample is not a background noise sample if a predetermined hangover period has not elapsed since near-end speech was transmitted on said channel and since far-end speech was transmitted on said channel.
A method for generatingcomfortnoise according to claim 23 wherein said determining step comprises the step of determining that a signal sample is not a background noise sample if a predetermined hangover period has not elapsed since near-end speech was transmitted on said channel and since far-end speech was transmitted on said channel.
Generally, when the echo suppressor is activated by the echo canceler to suppress any residual echo, the actual noise stored in the buffer is played back to provide a continuous background noise on the channel.
Comfortnoise is artificial background noise used in radio and wireless communications to fill the silent time in a transmission resulting from voice activity detection.
Voice activity detection (VAD, or VOX) is a form of squelching where low volume levels are ignored by the transmitting device.
To counteract these effects, a comfortnoisegenerator can be used, usually on the receiving end, to fill in the silent portions of VAD-processed transmissions with artificial noise, with a low volume level appropriate for the average volume level of the received signals.
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