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NTT's Real Time Wave Front Synthesis

February 26, 2013 | Telepresence Options



NTT is developing technology that faithfully reproduces pictures and sound from distant locations, creating a natural sense of distance and position, as if both people are in the same room.

"Regarding the picture, this system includes technology that uses 3D video. It continually generates pictures from such a viewpoint that, the other person seems to be right in front of you. Regarding the sound, the system uses technology that reproduces the sound wave-front, so you can hear the other person as if you're actually there with them.

The real-time wave-front synthesis technology used in this audio system applies a sound pick-up and replay algorithm to large microphone and speaker arrays, maintaining the physical properties of the sound wave, and reproducing the wave-front of the sound itself in real time.


"This differs from simple stereo or surround sound, in that you can hear it clearly even if you move around. So, you can identify the spatial position of the sound source."

Here, 64 mics are used to pick up the sound, which is replayed using 96 speakers on the back of the screen.

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