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Audio signal transmission techniques

  • US 9,111,542 B1
  • Filed: 03/26/2012
  • Issued: 08/18/2015
  • Est. Priority Date: 03/26/2012
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • under control of one or more computing devices configured with executable instructions,obtaining a first audio signal from a first audio transducer and a second audio signal from a second audio transducer, wherein the first audio transducer and the second audio transducer are included in an audio transducer array located within an environment;

    determining a time offset between the first audio signal and the second audio signal based at least in part on a time-difference-of-arrival between the first audio signal and the second audio signal;

    identifying, based at least in part on the time offset, at least one difference between at least a portion of the first audio signal and at least a portion of the second audio signal; and

    sending, to one or more computing resources that are remote from the environment, the first audio signal, information indicative of the at least one difference between the first audio signal and the second audio signal, and an indication of the time offset between the first audio signal and the second audio signal, the one or more computing resources that are remote from the environment being configured to;

    (i) construct a representation of the second audio signal using the first audio signal, the information indicative of the at least one difference between the first audio signal and the second audio signal, and the indication of the time offset between the first audio signal and the second audio signal, and (ii) perform automatic speech recognition (ASR) to identify a voice command present in at least one of the first audio signal or the representation of the second audio signal.

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