| 摘要 |
PROBLEM TO BE SOLVED: To provide a microphone system capable of covering an entire conference room, keeping high sound quality and minimizing a signal noise ratio. SOLUTION: An overhead microphone assembly includes a plurality unidirectional microphone elements. The microphone assembly is installed overhead generally above all desired sound sources and below undesired sound sources. Signals from these the plurality of microphone elements are fed into a microphone steering processor which can mix and gate-control the signals to ensure the best signal/noise ratio. The steering processor may also track the sound source dynamically when such tracking (source locating) is desired. The resulting audio signal from the steering processor may be further subjected to processing, such as echo canceling, noise reduction and automatic gain control. COPYRIGHT: (C)2006,JPO&NCIPI |
