Invention Grant
- Patent Title: Forming beams with nulls directed at noise sources
- Patent Title (中): 形成指向噪声源的零点的波束
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Application No.: US11404107Application Date: 2006-04-13
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Publication No.: US07991167B2Publication Date: 2011-08-02
- Inventor: William V. Oxford
- Applicant: William V. Oxford
- Applicant Address: US TX Austin
- Assignee: LifeSize Communications, Inc.
- Current Assignee: LifeSize Communications, Inc.
- Current Assignee Address: US TX Austin
- Agency: Meyertons Hood Kivlin Kowert & Goetzel, P.C.
- Agent Jeffrey C. Hood; Mark K. Brightwell
- Main IPC: H04R3/00
- IPC: H04R3/00

Abstract:
A communication system (e.g., a speakerphone) includes an array of microphones, a speaker, memory and a processor. The processor may perform a virtual broadside scan on the microphone array and analyze the resulting amplitude envelope to identify acoustic source angles. Each of the source angles may be further investigated with a directed beam (e.g., a hybrid superdirective/delay-and-sum beam) to obtain a corresponding beam signal. Each source may be classified as either intelligence or noise based on an analysis of the corresponding beam signal. The processor may design a virtual beam pointed at an intelligence source and having nulls directed at one or more of the noise sources. Thus, the virtual beam may be highly sensitive to the intelligence source and insensitive to the noise sources.
Public/Granted literature
- US20060262943A1 Forming beams with nulls directed at noise sources Public/Granted day:2006-11-23
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