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Method and system for transmitting and/or receiving audio signals with a desired direction

  • US 20040114772A1
  • Filed: 02/10/2004
  • Published: 06/17/2004
  • Est. Priority Date: 03/21/2002
  • Status: Abandoned Application
First Claim
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1. A method for controlling communication between acoustic devices and a subject location, the method utilizing signal processing by a wavelet packet transform model and being characterized in:

  • . (i) processing first digital signals representative of external acoustic signals received by the at least two acoustic receiving devices to identify a desired communication direction associated with the subject location, and using data indicative of the desired direction for optimizing parameters of a selected wavelet packet transform model to be used for controlling the communication between at least two acoustic transmitting devices and the subject location; and

    (ii) controlling said communication by processing second digital signals representative of signals that are to be transmitted as acoustic signals through the at least two acoustic transmitting devices, said processing comprising applying to said second digital signals the optimized selected wavelet packet transform model to thereby produce a second digital output signal to operate said at least two acoustic transmitting device, said second digital output signal having an optimal shape with a desired angular distribution of energy in said signal such that a maximal energy component thereof is substantially that of the desired direction, while its energy components associated with directions outside said desired directions are substantially suppressed.

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