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Remote speaker for surround-sound applications

  • US 5,666,422 A
  • Filed: 05/18/1994
  • Issued: 09/09/1997
  • Est. Priority Date: 05/18/1994
  • Status: Expired due to Fees
First Claim
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1. A remote wireless surround sound speaker for use with audio sources having left and right audio signals, comprising:

  • a) a difference signal transmitter unit comprising decoder means for generating a difference signal representing the difference between the right and left audio signals and transmitter means for transmitting the difference signal to a remote location, wherein the decoder means of the difference signal transmitter unit is a transformer having a primary winding having inputs at each end of the winding and a secondary winding having an output at one end of the winding and a grounded center tap, wherein the left and right audio signals are connected to the inputs at the ends of the primary winding, and the difference signal is output from the output at the end of the secondary winding, andb) a remote receiver unit comprisingi) receiver means for receiving and detecting the difference signal transmitted by the difference signal transmitter unit, having an input for accepting the signal from the transmitter unit, and a difference signal output comprising the received audio difference signal,ii) amplifier means for amplifying an audio signal, having an input connected to the difference signal output of the receiver means, and an output for driving speakers with the difference signal, andiii) speaker means connected to the output of the amplifier means, such that the speaker means reproduces a signal representing the difference between the left and right audio signals of the audio source.

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