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Method to synchronize playback of multicast audio streams on a local network

  • US 7,324,857 B2
  • Filed: 04/19/2002
  • Issued: 01/29/2008
  • Est. Priority Date: 04/19/2002
  • Status: Active Grant
First Claim
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1. A method of audio synchronization on a home network, comprising:

  • sending digital audio streams to two or more receiver devices, said digital audio streams including a control code to a specific one of the two or more receiver devices;

    outputting sound wave signals from two or more receiver devices on the home network;

    recording a first time difference between a first time of sending a control code to the specific one of the two or more receiver devices and a second time the sound wave signal is received from the specific one of the two or more receiver devices;

    recording a second time difference between a third time of sending a control code to an other specific one of the two or more receiver devices and a fourth time the sound wave signal is received from the other one of the two or more receiver devices; and

    automatically adjusting a relative delay of the sound wave signals outputted from the specific one of the two or more receiver devices;

    wherein the relative delay is adjusted by buffering the digital audio stream received in the specific one of the two or more receiver devices.

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