Method and apparatus for synchronizing hearing instruments via wireless communication
First Claim
Patent Images
1. A hearing assistance system, comprising:
- a first hearing instrument being a master device and including;
a master clock;
a master synchronization circuit configured to initiate a synchronization cycle and generate master time stamps for specified events during the synchronization cycle using the master clock;
wherein the master synchronization circuit comprises a master stamping module configured to generate the master time stamps;
a master device radio circuit configured to transmit the master time stamps via a wireless link; and
a second hearing instrument being a slave device and including;
a slave device radio circuit configured to receive the master time stamps via the wireless link;
a slave clock; and
a slave synchronization circuit configured to generate slave time stamps for specified events during the synchronization cycle using the slave clock and adjust the slave clock for synchronization with the master clock during the synchronization cycle using the master time stamps and the slave time stamps, wherein the slave synchronization circuit comprises;
a slave stamping module configured to generate the slave time stamps;
an offset calculator configured to calculate one or more offset parameters indicative of offset between the master clock and the slave clock using the master time stamps and the slave time stamps; and
a clock adjuster configured to adjust the slave clock for synchronizing the slave clock to the master clock using the one or more offset parameters;
wherein the clock adjuster comprises;
a comparator configured to compare the one or more offset parameters each to a specified offset threshold; and
an adjuster configured to adjust the slave clock in response to at least one offset parameter of the one or more offset parameters exceeding the corresponding specified offset threshold;
wherein the master device radio circuit and the slave device radio circuit are configured to transmit audio signals between the first hearing instrument and the second hearing instrument via the wireless link.
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Abstract
A hearing assistance system including a hearing instrument designated as a master device and at least another hearing instrument designated as a slave device. The master device is communicatively coupled to the slave device via a wireless link. The master device has a master clock and generates master time stamps for specified events timed by the master clock. The master time stamps are sent to the slave device via the wireless link. The slave device has a slave clock and generates slave time stamps for specified events timed by the slave clock. The slave clock is adjusted for synchronization to the master clock using the master time stamps and the slave time stamps.
18 Citations
18 Claims
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1. A hearing assistance system, comprising:
- a first hearing instrument being a master device and including;
a master clock; a master synchronization circuit configured to initiate a synchronization cycle and generate master time stamps for specified events during the synchronization cycle using the master clock; wherein the master synchronization circuit comprises a master stamping module configured to generate the master time stamps; a master device radio circuit configured to transmit the master time stamps via a wireless link; and a second hearing instrument being a slave device and including; a slave device radio circuit configured to receive the master time stamps via the wireless link; a slave clock; and a slave synchronization circuit configured to generate slave time stamps for specified events during the synchronization cycle using the slave clock and adjust the slave clock for synchronization with the master clock during the synchronization cycle using the master time stamps and the slave time stamps, wherein the slave synchronization circuit comprises; a slave stamping module configured to generate the slave time stamps; an offset calculator configured to calculate one or more offset parameters indicative of offset between the master clock and the slave clock using the master time stamps and the slave time stamps; and a clock adjuster configured to adjust the slave clock for synchronizing the slave clock to the master clock using the one or more offset parameters; wherein the clock adjuster comprises; a comparator configured to compare the one or more offset parameters each to a specified offset threshold; and an adjuster configured to adjust the slave clock in response to at least one offset parameter of the one or more offset parameters exceeding the corresponding specified offset threshold; wherein the master device radio circuit and the slave device radio circuit are configured to transmit audio signals between the first hearing instrument and the second hearing instrument via the wireless link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a first hearing instrument being a master device and including;
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11. A method for synchronizing a first hearing instrument with a second hearing instrument, the method comprising:
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initiating a synchronization cycle using the first hearing instrument; generating master time stamps for specified events timed using a master clock in the first hearing instrument during the synchronization cycle; sending the master time stamps to the second hearing instrument via a wireless link;
generating slave time stamps for specified events timed using a slave clock in the second hearing instrument during the synchronization cycle;adjusting the slave clock for synchronization of the slave clock to the master clock using the master time stamps and the slave time stamps; and wherein synchronizing the slave clock to the master clock comprises; calculating one or more offset parameters indicative of offset between the master clock and the slave clock using the master time stamps and the slave time stamps; and adjusting the slave clock to synchronize the slave clock to the master clock using the one or more offset parameters; wherein adjusting the slave clock to synchronize the slave clock to the master clock comprises; comparing the one or more offset parameters each to a specified offset threshold; and adjusting the slave clock in response to at least one offset parameter of the one or more offset parameters exceeding the corresponding specified offset threshold; and transmitting audio signals between the first hearing instrument and the second hearing instrument via the wireless link. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification