System and method for creating a doppler effect

Details System and method for creating a doppler effect System and method for creating a doppler effect

1996-08-02

1998-02-17

Kuntz, Curtis

Electrical audio signal processing systems and devices

Sound effects

84603, H03G 300

Patent

active

057199442

ABSTRACT:
System and method for creating a Doppler Effect signal in a virtual reality environment. A host produces: (1) an audio signal indicative of sound produced by a sound source, (2) a first set of signals indicative of a velocity of the sound source and an observer of the sound source, and (3) a second set of signals indicative of a position of the sound source and the observer. An interpolator interpolates the audio signal and generates an interpolation signal. A Doppler engine receives the first and second sets of signals and generates a decimation factor signal. A decimator filter, receives the interpolation signal and the decimation factor signal and generates a decimation signal. The decimation signal is a digital representation of said Doppler Effect signal and can be converted to an analog signal for broadcast to a listener.

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patent: 5633993 (1997-05-01), Redmann et al.
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Crochiere, Ronald E. and Lawrence R. Rabiner, Multirate Digital Signal Processing, "Sampling Rate Conversion -A Direct Digital Approach," Prentice-Hall, Inc., Englewod Cliffs, NJ, 1983, pp. 31-39.

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