US 2010/0106491 A1Published application

Voice Activity Detection and Silence Suppression in a Packet Network

AssigneeAT&T Corp.

InventorsJames H. James, Joshua Hal Rosenbluth

Life of this patent

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Abstract

The present invention is a system and method that improves upon voice activity detection by packetizing actual noise signals, typically background noise. In accordance with the present invention an access network receives an input voice signal (including noise) and converts the input voice signal into a packetized voice signal. The packetized voice signal is transmitted via a network to an egress network. The egress network receives the packetized voice signal, converts the packetized voice signal into an output voice signal, and outputs the output voice signal. The egress network also extracts and stores noise packets from the received packetized voice signal and converts the packetized noise signal into an output noise signal. When the access network ceases to receive the input voice signal while the call is still ongoing, the access network instructs the egress network to continually output the output noise signal.

Claims1

Dependent claims

A computer readable medium containing instructions for controlling a computing device to provide background sound processing during an ongoing call, the instructions comprising:

receiving an input voice signal and a background noise signal by an access gateway and converting the input noise signal into a packetized voice signal and a packetized noise signal;
transmitting the packetized voice signal and the packetized noise signal from the access gateway to an egress gateway via a network;
receiving the packetized voice signal and the packetized noise signal by the egress gateway and converting the packetized voice signal into an output voice signal;
extracting and storing by the egress gateway noise packets from the received packetized noise signal and converting the packetized noise signal into an output noise signal;
and
upon ceasing to receive the input voice signal by the access gateway while the call is still ongoing, instructing the egress gateway to continually output the output noise signal.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/647,863Filed 28 Dec 2009
Priority: 27 Dec 2002
Published: 29 Apr 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G10L 19/167
Vocoder architecture: audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission…
G10L 19/012
Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals,…:…
G10L 25/78
Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00: detection of presence or absence of voice signals
H04L 65/1059
Architectures or entities: end-user terminal functionalities specially adapted for real-time communication

Family

Application10/330,957Continuation · filed 27 Dec 2002
Application11/773,699Continuation · filed 5 Jul 2007
Application12/647,863Continuation
US 7,272,552 B1Related patent
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US 8,112,273 B2Related patent
US 2010/0106491 A1This patent

From the US filing history. Foreign family members aren’t listed.