Remote control signaling using audio watermarks
First Claim
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1. A method, comprising:
- receiving, at a first device, an acoustically propagated audio content transmitted by a speaker device, wherein the acoustically propagated audio content corresponds to a user voice command and includes one or more substantially inaudible watermarks that are embedded therein, and wherein the one or more substantially inaudible watermarks include designed characteristics that improve watermark robustness against impairments due to acoustic propagation of the audio content;
recovering, at the first device, at least one embedded watermark from the received audio content; and
triggering an operation of the first device based at least in-part on the recovered watermark(s).
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Abstract
A system for using a watermark embedded in an audio signal to remotely control a device. Various devices such as toys, computers, and appliances, equipped with an appropriate detector, detect the hidden signals, which can trigger an action, or change a state of the device. The watermarks can be used with a “time gate” device, where detection of the watermark opens a time interval within which a user is allowed to perform an action, such as pressing a button, typing in an answer, turning a key in a lock, etc.
472 Citations
30 Claims
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1. A method, comprising:
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receiving, at a first device, an acoustically propagated audio content transmitted by a speaker device, wherein the acoustically propagated audio content corresponds to a user voice command and includes one or more substantially inaudible watermarks that are embedded therein, and wherein the one or more substantially inaudible watermarks include designed characteristics that improve watermark robustness against impairments due to acoustic propagation of the audio content; recovering, at the first device, at least one embedded watermark from the received audio content; and triggering an operation of the first device based at least in-part on the recovered watermark(s). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A device, comprising:
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a receiver configured to receive an acoustically propagated audio content transmitted by a speaker device, wherein the acoustically propagated audio content corresponds to a user voice command and includes one or more substantially inaudible watermarks embedded therein, and wherein the one or more substantially inaudible watermarks include designed characteristics that improve watermark robustness against impairments due to acoustic propagation of the audio content; an extractor configured to recover at least one embedded watermark from the acoustically propagated user voice command audio content; a control module configured to trigger an operation of the device based at least in-part on the recovered watermark(s). - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A non-transitory storage medium with an audio content stored thereupon, the stored audio content corresponding to a user voice command and comprising:
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one or more substantially inaudible watermarks that are embedded in the audio content, wherein the one or more substantially inaudible watermarks include designed characteristics that improve watermark robustness against impairments due to acoustic propagation of the audio content and wherein upon reception of the audio content that has been acoustically propagated to a device equipped with a watermark extractor, the device is triggered to; recover at least one embedded watermark from the acoustically propagated audio content; and trigger an operation of the device based at least in-part on the recovered watermark(s).
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Specification