Audio-Visual Panoramas and Spherical Audio Analysis using the Audio Camera
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Capturing a scene for later or contemporaneous display needs to capture the complex interactions between the source(s) in the scene and the environment. High order spherical Ambisonics and plane-wave analysis are powerful mathematical tools for such scene analysis. The spherical microphone array (and its embodiment in the Audio Camera) is a useful tool for capture and analysis of scenes. Further information about the environment is available from the visual scene. We present the audio-visual panoramic camera as a tool that greatly simplifies the task of processing audio visual information by providing one common framework for both modalities. Via the Audio Camera , we show that microphone arrays can be viewed as a central projection camera that can effectively image the audible acoustic frequency spectrum. We demonstrate a new device, the audio visual Panoramic camera that is composed of a 64 channel spherical microphone array combined with a 5 element video camera array. The combined sensor is capable of real-time audio visual panoramic image generation using state of the art NVidia Graphics cards. It also provides an order-7 ambisonic description of the scene.
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