Elevated ring microphone apparatus and method

A microphone and ring technology, applied in frequency/directional characteristic devices, signal processing, sensor components, etc., to solve problems such as deteriorating audio quality

Inactive Publication Date: 2011-11-30
CISCO SYST INT R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ring microphone is also very sensitive to noise originating from the surface of the table, such as those caused by p...

Method used

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  • Elevated ring microphone apparatus and method
  • Elevated ring microphone apparatus and method
  • Elevated ring microphone apparatus and method

Examples

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Embodiment Construction

[0041] Hereinafter, the present invention will be discussed by describing preferred embodiments with reference to the accompanying drawings. However, other applications and modifications will occur to those skilled in the art within the scope of the present disclosure as defined by the appended claims.

[0042] figure 1 is a schematic diagram depicting the audio portion of a video teleconferencing system. exist figure 1 In this example, a speaker 10a in a room 110a and a speaker 10b in a room 110b participate in a video conference call. Rooms 110a and 110b may be physically adjacent to each other within the same building, or separated by thousands of miles. Accordingly, communication link 140 is used to transmit video and audio data between rooms 110a and 110b.

[0043] Exemplary communication link 140 may be wired, such as a PSTN telephone system, a wide area network (WAN), a local area network (LAN), or an ad hoc network (Ad-hoc). Exemplary communication link 140 may al...

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Abstract

A video teleconferencing directional microphone includes three microphone elements arranged coincidentally on a vertical axis. The three microphone elements are placed on a supporting surface so that a first microphone element is on the surface, and the second and third microphone elements are elevated above the supporting surface. The directional microphone also includes three filters, a summing node, and an equalizer, which are used to shape the directivity pattern of the directional microphone into an elevated toroid sensitivity pattern. The elevated toroid sensitivity pattern increases sensitivity in the direction of a sound source of interest, but reduces sensitivity to any sound waves generated by noise sources at other locations.

Description

technical field [0001] The present disclosure relates to an overhead ring microphone and a method for generating an overhead ring pattern in an overhead ring microphone. [0002] The present invention describes a microphone that has a sensitivity map that is independent of microphone azimuth and that maximizes sensitivity in the direction of the sound source of interest and minimizes it for sounds coming from other directions. Background technique [0003] Video teleconferencing systems are used to create virtual conferences between two or more people located in different rooms, or between two or more groups of people. The rooms may be in the same building, or in different buildings located in different cities, countries, continents, and the like. Thus, video teleconferencing can be used to set up meetings that might otherwise require long-distance travel. [0004] To set up a virtual meeting, a video teleconferencing system transmits video and audio data and therefore inc...

Claims

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Application Information

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IPC IPC(8): H04R1/40H04R3/00
CPCH04M3/56H04R1/406H04R2201/403H04R2430/03H04R2430/20H04R3/005H04R2201/405
Inventor 特吕格弗·弗雷德里克·马顿
Owner CISCO SYST INT R L
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