Voice-scrambling-signal creation method and apparatus, and...

Details Voice-scrambling-signal creation method and apparatus, and... Voice-scrambling-signal creation method and apparatus, and...

G - Physics

10

K

G10K 11/175 (2006.01) G10K 11/00 (2006.01) G10K 15/00 (2006.01) G10L 21/00 (2006.01)

Patent

CA 2600241

Original voice uttered in a first space is acquired via a microphone and a series of digital waveform data of the acquired original voice are obtained. The waveform data are sequentially segmented into plural frames and the waveform data of the individual frames are written into a memory. In parallel with writing, into the memory, of the waveform data, individual ones of the frames already written in the memory are sequentially or randomly selected and read out in a direction opposite to a direction the waveform data of the frame have been written so that a reverse-reproduced voice signal is generated. As the original voice is transmitted, as a leaked voice from the first space to a second space near the first space, a scrambling voice based on the reverse-reproduced voice signal is spatially mixed with the leaked voice in the second space.

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