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公开(公告)号：US10313041B2
公开(公告)日：2019-06-04
申请号：US15275315
申请日：2016-09-23
Applicant: Apple Inc.
Inventor： Ashley I. Butterworth , Daniel C. Klingler , Simon E. C. Goldrei
Abstract: In a time synchronization process, chain of quality information is provided between interconnected nodes, the chain of quality information relating to information regarding accuracy of a clock, a type of timestamping used by a node, a type of link over which a timestamp is provided, and a clock drift parameter indicating the drift characteristics of the clock. Based on the chain of quality information, parameters are determined for a filter that is applied to a sequence of timestamps in order to remove noise from the timestamps, thereby improving accuracy of the time synchronization process.
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公开(公告)号：US20190166431A1
公开(公告)日：2019-05-30
申请号：US15827642
申请日：2017-11-30
Applicant: Apple Inc.
Inventor： Joshua L. Hare , Daniel C. Klingler , Daniel S. Naito , Richard M. Powell
CPC classification number: H04R9/022 , G06F1/206 , G06F1/3203 , G11B2020/10555 , H04R1/26 , H04R1/403 , H04R2201/028 , H04R2420/07 , H04R2430/01 , H05B3/30
Abstract: An audio appliance includes an oscillatable diaphragm, a first heat-dissipation unit, a second heat-dissipation unit, and a control unit. The first heat-dissipation unit dissipates heat at a first rate and the second heat-dissipation unit dissipates heat at a second rate. The control unit can receive an indication of a temperature of the first heat-dissipation unit and an indication of a temperature of the second heat-dissipation unit. The control unit provides oscillation control of the oscillatable diaphragm to maintain the temperature of the first heat-dissipation unit below a first threshold and/or to maintain the temperature of the second heat-dissipation unit below a second threshold. The control unit can provide the oscillation control responsive to each of the indication of the temperature of the first heat-dissipation unit and the indication of the temperature of the second heat-dissipation unit exceeding a respective threshold.
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公开(公告)号：US20170359137A1
公开(公告)日：2017-12-14
申请号：US15275315
申请日：2016-09-23
Applicant: Apple Inc.
Inventor： Ashley I. Butterworth , Daniel C. Klingler , Simon E. C. Goldrei
CPC classification number: H04J3/0661 , H04J3/0664 , H04J3/0673 , H04L69/08 , H04L69/28
Abstract: In a time synchronization process, chain of quality information is provided between interconnected nodes, the chain of quality information relating to information regarding accuracy of a clock, a type of timestamping used by a node, a type of link over which a timestamp is provided, and a clock drift parameter indicating the drift characteristics of the clock. Based on the chain of quality information, parameters are determined for a filter that is applied to a sequence of timestamps in order to remove noise from the timestamps, thereby improving accuracy of the time synchronization process.
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公开(公告)号：US20170289231A1
公开(公告)日：2017-10-05
申请号：US15436401
申请日：2017-02-17
Applicant: Apple Inc.
Inventor： Richard M. Powell , Ashley I. Butterworth , Anthony J. Guetta , Daniel C. Klingler , Jeffrey C. Moore , Alexander C. Powers
IPC: H04L29/06 , H04N21/2343 , H04N21/43 , H04N21/643 , H04N21/242
CPC classification number: H04N21/234381 , H04L65/601 , H04N21/242 , H04N21/4302 , H04N21/4305 , H04N21/4307 , H04N21/43615 , H04N21/439 , H04N21/440281 , H04N21/643
Abstract: Methods and systems provide control of media synchronization using time stamp pairs. In an embodiment, a first device may request a time stamp from a second device. The first device may determine any de-synchronization between the first and second devices based on the requested time stamp and characteristics of the request. The first device may define a rate scalar based on the determined de-synchronization. A sample rate conversion may be performed for the first device based on the rate scalar such that the outputs of the first device and the second device are synchronized.
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