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1. 发明申请

US20180341456A1 Playback Device 审中-公开
公开(公告)号：US20180341456A1
公开(公告)日：2018-11-29
申请号：US16052316
申请日：2018-08-01
申请人： Sonos, Inc
发明人： Nicholas A.J. Millington
IPC分类号： G06F3/16 , H04W84/20 , G05B15/02 , H04W56/00 , G06F1/00 , G06F1/12 , G06F3/048 , H04R27/00 , H04R3/12 , H04N21/436 , H04N21/43 , H04N9/79 , H04N5/04 , H04L29/06 , H04L29/08 , H04L12/28 , H04J3/06 , H04H20/26 , H04H20/10 , H03G3/20 , H03G3/00 , G11B20/10 , G06F17/30 , G06F17/00 , G06F3/0484 , G06F3/0482
CPC分类号： G06F3/165 , G05B15/02 , G06F1/00 , G06F1/12 , G06F3/048 , G06F3/0482 , G06F3/0484 , G06F3/04842 , G06F3/04847 , G06F3/16 , G06F3/162 , G06F3/167 , G06F17/00 , G06F17/3074 , G06F17/30749 , G06F17/30761 , G11B20/10527 , G11B2020/10592 , H03G3/00 , H03G3/20 , H04H20/103 , H04H20/26 , H04H2201/20 , H04J3/0664 , H04L12/2854 , H04L65/1069 , H04L65/4069 , H04L65/4076 , H04L65/4084 , H04L65/4092 , H04L65/60 , H04L65/601 , H04L65/80 , H04L67/1095 , H04L67/12 , H04L67/26 , H04L69/28 , H04N5/04 , H04N9/7904 , H04N21/4307 , H04N21/43615 , H04R3/12 , H04R27/00 , H04R2227/003 , H04R2227/005 , H04W56/0015 , H04W84/20 , H05K999/99
摘要： A system is described for maintaining synchrony of operations among a plurality of devices that have independent clocking arrangements. The system includes a task distribution device that distributes tasks to a synchrony group comprising a plurality of devices that are to perform the tasks distributed by the task distribution device in synchrony. The task distribution device distributes each task to the members of the synchrony group over a network. Each task is associated with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which the members of the synchrony group are to execute the task. Each member of the synchrony group periodically obtains from the task distribution device an indication of the current time indicated by its clock, determines a time differential between the task distribution device's clock and its respective clock and determines therefrom a time at which, according to its respective clock, the time stamp indicates that it is to execute the task.

2. 发明授权

US10015004B2 Preventing a network from propagating incorrect time information 有权
公开(公告)号：US10015004B2
公开(公告)日：2018-07-03
申请号：US15363089
申请日：2016-11-29
申请人： Landis+Gyr Innovations, Inc.
发明人： John Bettendorff , Pushpesh Kumar Deshmukh
IPC分类号： H04L7/00 , H04L12/24 , H04L12/26 , H04J3/06 , H04W4/80 , H04W56/00 , H04W84/18
CPC分类号： H04L7/0004 , H04J3/0638 , H04J3/0644 , H04J3/0664 , H04L41/0803 , H04L41/0806 , H04L41/0866 , H04L43/106 , H04L63/126 , H04W4/80 , H04W24/04 , H04W56/001 , H04W84/18
摘要： Prior to joining a device to a network, the device is connected to an external system via a local connection. The external system provides the device with a local time stamp that includes a local time value and a local time error value. The device may use the time information to communicate with the external system. After the device is joined to the network, the device may transmit a communication on the network that includes time information. If so, then the communication includes a time value based on the device's time value and a time error value set to a value indicating a maximum error. The network is protected from potentially poor quality time information. Any device that receives the communication rejects the time information since the time error value indicates a maximum error.

3. 发明授权

US09991981B2 Method for operating a node of a communications network, a node and a communications network 有权
公开(公告)号：US09991981B2
公开(公告)日：2018-06-05
申请号：US14992597
申请日：2016-01-11
申请人： BECKHOFF AUTOMATION GMBH
发明人： Thorsten Bunte , Holger Büttner , Dirk Janssen , Erik Vonnahme , Thomas Rettig , Hans Beckhoff
IPC分类号： H04J3/06 , H04L12/64
CPC分类号： H04J3/0658 , H04J3/0664 , H04L12/6418
摘要： A method for operating a node in a communications network comprises the following steps: The node receives a reference time via the communications network. A transmit clock of the node, which was determined for an earlier clock cycle on the basis of a local clock of the node, is compared with the reference time. The local clock of the node is corrected on the basis of the comparison result. On the basis of the corrected local clock a transmit clock is determined to be used by the node for the current clock cycle.

4. 发明授权

US09942292B2 Transmission apparatus, transmitting method, reception apparatus, and reception method 有权
公开(公告)号：US09942292B2
公开(公告)日：2018-04-10
申请号：US15116463
申请日：2014-11-18
申请人： SONY CORPORATION
发明人： Naohisa Kitazato
IPC分类号： H04L29/06 , H04J3/06
CPC分类号： H04L65/4076 , H04H60/13 , H04H60/40 , H04J3/0664 , H04N21/23602 , H04N21/4302
摘要： In a broadcast scheme of transportation in an IP scheme, clock synchronization and presentation synchronization are well implemented. A clock synchronizing with time information acquired from an outside is generated. Time information including frequency information of the clock and synchronizing with the time information acquired from the outside is generated. A broadcast signal including transmission media, time acquisition information for acquiring decoding time and presentation time for every presentation unit of the transmission media obtained based on the generated time information, and the generated time information is transmitted.

5. 发明申请

US20180091407A1 ERROR DETECTION IN COMMUNICATION NETWORKS 审中-公开
公开(公告)号：US20180091407A1
公开(公告)日：2018-03-29
申请号：US15703192
申请日：2017-09-13
申请人： ARM LIMITED
发明人： Mika Antero TERVONEN , Sven Juhani PUURULA
IPC分类号： H04L12/26
CPC分类号： H04L43/0852 , H04J3/06 , H04J3/0664 , H04L41/0654 , H04L43/04 , H04L43/0811 , H04L43/0817 , H04L43/103 , H04L43/12 , H04L47/22 , H04L47/28 , H04L67/145 , H04L69/28 , H04W56/00
摘要： Broadly speaking, embodiments of the present techniques provide apparatus and methods to identify and correct communication errors in a network formed of a plurality of nodes. In particular, the apparatus and methods identify synchronisation errors in a network which result in delayed propagation of messages through the network.

6. 发明授权

US09798515B1 Clock synchronization for audio playback devices 有权
公开(公告)号：US09798515B1
公开(公告)日：2017-10-24
申请号：US15087021
申请日：2016-03-31
申请人： Bose Corporation
发明人： Paulo Souza Mendes , Michael William Elliot
IPC分类号： H04B5/00 , G06F3/16 , H04L12/18 , H04L7/04 , H04J3/06
CPC分类号： G06F3/165 , H04J3/0635 , H04J3/0664 , H04J3/0667 , H04L7/04 , H04L12/18 , H04N21/4307 , H04N21/439 , H04N21/8106
摘要： A method is provided for synchronizing clocks on a plurality of audio playback devices. The method includes receiving a broadcast/multicast acknowledgement packet from a synchronization agent at a first audio playback device of the plurality of audio playback devices. A first timestamp representing a time when the acknowledgement packet was received by the first audio playback device is recorded. A broadcast/multicast timestamp packet is received from a time server at the first audio playback device. The timestamp packet includes a second timestamp representing a time when the time server received the acknowledgement packet from the synchronization agent. A local clock time on the first audio playback device is updated based on the first timestamp and the second timestamp. The method enables clock synchronization among the plurality of audio playback devices for synchronized playback of streamed audio via the plurality of audio playback devices.

7. 发明授权

US09665341B2 Synchronized audio mixing 有权
公开(公告)号：US09665341B2
公开(公告)日：2017-05-30
申请号：US14617604
申请日：2015-02-09
申请人： Sonos, Inc.
发明人： Ted Lin , Luis Vega
IPC分类号： G06F3/16 , G11B27/10 , H04H60/04 , H04J3/06 , H04N21/43 , H04N21/436 , H04N21/439 , H04N21/485 , H04R27/00
CPC分类号： G06F3/165 , G11B27/10 , H04H60/04 , H04J3/0664 , H04N21/4305 , H04N21/4307 , H04N21/43615 , H04N21/439 , H04N21/4852 , H04R27/00 , H04R2227/003 , H04R2227/005
摘要： A first example playback device includes one or more processors and a non-transitory computer-readable medium storing instructions that, when executed by the one or more processors, cause the first playback device to perform functions. The functions include generating a mixed audio signal comprising one or more components of a first audio stream and one or more components of a second audio stream; and playing the mixed audio signal, where the one or more components of the second audio stream of the mixed audio signal played by the first playback device are played in synchrony with a second playback device configured to play the second audio stream. An example non-transitory computer-readable medium and an example method, both related to the first example playback device, are also disclosed herein.

8. 发明申请

US20170099644A1 METHOD AND APPARATUS FOR SYNCHRONIZING HEARING INSTRUMENTS VIA WIRELESS COMMUNICATION 审中-公开
公开(公告)号：US20170099644A1
公开(公告)日：2017-04-06
申请号：US15295222
申请日：2016-10-17
申请人： STARKEY LABORATORIES, INC.
发明人： JON S. KINDRED , TAO ZHANG , IVO MERKS , JEFFREY PAUL SOLUM , MIHRAN H TOURIGUIAN
IPC分类号： H04W56/00 , H04R25/00
CPC分类号： H04W56/0015 , G06F1/12 , H04J3/0664 , H04J3/0697 , H04R25/405 , H04R25/552 , H04R25/554 , H04R2225/55 , H04W56/005 , H04W84/20
摘要： 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.

9. 发明授权

US09596072B2 Method and apparatus for mitigation of packet delay variation 有权
标题翻译：用于缓解分组延迟变化的方法和装置
公开(公告)号：US09596072B2
公开(公告)日：2017-03-14
申请号：US14562062
申请日：2014-12-05
申请人： ADVA Optical Networking SE
发明人： Peter Turnbull
IPC分类号： H04L7/00 , H04L12/841 , H04J3/16 , H04L12/26 , H04J3/06
CPC分类号： H04L7/0037 , H04J3/0664 , H04J3/16 , H04L43/0858 , H04L47/283
摘要： An apparatus for mitigation of packet delay variation, PDV, in a packet-based network, comprising an ingress port to receive event messages, each message being timestamped with a local ingress timestamp at the instant of reception of the message using a local internal clock; an extraction unit to extract a timestamp embedded in the received message; a computation unit to calculate a time offset between the extracted embedded timestamp and the local ingress timestamp of the received event message to record the calculated time offset as a maximum observed delay, if the calculated time offset exceeds a previously recorded maximum observed delay, the computation unit adjusting an internal transmission delay time before onward transmission of the event message from an egress port depending on a time difference between recorded maximum observed delay and calculated time offset of the event message to minimize the packet delay variation, PDV, at the egress port.
摘要翻译：一种用于缓解基于分组的网络中的分组延迟变化PDV的装置，包括用于接收事件消息的入口端口，每个消息使用本地内部时钟在接收消息时使用本地入口时间戳进行时间戳; 提取单元，用于提取嵌入在接收到的消息中的时间戳; 计算单元，用于计算所提取的嵌入时间戳和接收到的事件消息的本地入口时间戳之间的时间偏移量，以将计算出的时间偏移记录为最大观测延迟，如果所计算的时间偏移超过先前记录的最大观测延迟，单元根据记录的最大观察延迟与计算出的事件消息的时间偏移之间的时间差来调整来自出口端口的事件消息的向前发送之间的内部传输延迟时间，以最小化出口端口处的分组延迟变化PDV。

10. 发明授权

US09548833B2 Method, apparatus and system for time distribution in a telecommunications network 有权
标题翻译：用于电信网络中时间分配的方法，装置和系统
公开(公告)号：US09548833B2
公开(公告)日：2017-01-17
申请号：US13978660
申请日：2012-03-15
申请人： Dinh Thai Bui , Michel Le Pallec
发明人： Dinh Thai Bui , Michel Le Pallec
IPC分类号： H04J3/06
CPC分类号： H04J3/0697 , H04J3/0664 , H04J3/0667 , H04J3/0673
摘要： The invention is directed to a clock module and method for distributing a time reference to at least one clock in a packet-switched network. The clock module includes a slave port, a master port and a local clock. The method comprises the steps of receiving a first synchronization packet at the slave port, the first synchronization packet comprising a first master clock timestamp and generating at least one internal signal comprising the first master clock timestamp. The method also includes the steps of transmitting the at least one internal signal to the master port and receiving the at least one internal signal at the master port. Then a method includes determining the internal propagation time of the signal through the clock module and generating a second synchronization packet at the master port comprising a second master clock timestamp, the second master clock timestamp comprising the sum of the first master clock timestamp and the internal propagation time. Finally, the second synchronization packet is sent to at least one other clock in the packet-switched network.
摘要翻译：本发明涉及一种用于将时间参考分配给分组交换网络中的至少一个时钟的时钟模块和方法。时钟模块包括从端口，主端口和本地时钟。该方法包括以下步骤：在从端口处接收第一同步分组，第一同步分组包括第一主时钟时间戳，并且生成包括第一主时钟时间戳的至少一个内部信号。该方法还包括将至少一个内部信号发送到主端口并在主端口处接收至少一个内部信号的步骤。然后，一种方法包括确定通过时钟模块的信号的内部传播时间，并在主端口处产生包括第二主时钟时间戳的第二同步分组，第二主时钟时间戳包括第一主时钟时间戳和内部传播时间。最后，第二同步分组被发送到分组交换网络中的至少一个其他时钟。

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