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Low-latency audio networking

  • US 10,425,753 B2
  • Filed: 01/22/2018
  • Issued: 09/24/2019
  • Est. Priority Date: 06/15/2012
  • Status: Active Grant
First Claim
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1. A first playback device comprising:

  • a network interface;

    at least one processor;

    a non-transitory computer-readable medium; and

    program instructions stored on the non-transitory computer-readable medium that, when executed by the at least one processor, cause the first playback device to perform functions comprising;

    selecting a first channel of a first frequency spectrum for use in transmitting audio information to one or more other playback devices;

    detecting the presence of a second playback device configured to receive audio information from the first playback device;

    in response to detecting the presence of the second playback device, transmitting, via the network interface, first control information to the second playback device via a second channel of a second frequency spectrum that differs from the first frequency spectrum;

    transmitting, via the network interface, a probe to the second playback device via the first channel of the first frequency spectrum;

    determining that the probe has been received by the second playback device;

    in response to determining that the probe has been received by the second playback device, transmitting, via the network interface, at least a first portion of given audio information to the second playback device via the first channel of the first frequency spectrum, wherein the first portion of the given audio information is to be played by the second playback device;

    while transmitting at least the first portion of the given audio information to the second playback device via the first channel of the first frequency spectrum, determining that a quality of transmission of the first portion of the given audio information from the first playback device to the second playback device via the first channel of the first frequency spectrum has degraded below a threshold;

    selecting a third channel of the first frequency spectrum that differs from the first channel;

    transmitting, via the network interface, second control information to the second playback device via the second channel of the second frequency spectrum, wherein the second control information comprises information that identifies the third channel of the first frequency spectrum; and

    switching from transmitting, via the network interface, at least the first portion of the given audio information to the second playback device via the first channel of the first frequency spectrum to transmitting, via the network interface, at least the first portion of the given audio information to the second playback device via the third channel of the first frequency spectrum.

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