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    • 11. 发明授权
    • Method of capturing constant echo path information in a full duplex speakerphone using default coefficients
    • 使用默认系数在全双工免提电话机中捕获恒定回波路径信息的方法
    • US07187765B2
    • 2007-03-06
    • US10722472
    • 2003-11-28
    • Mirjana PopovicXin Xu
    • Mirjana PopovicXin Xu
    • H04B3/23
    • H04M9/082
    • A method of determining when to save default coefficients in an echo canceller so as to ensure that the capture of coefficients that correspond to the best possible echo cancellation in a current condition. Coefficients are saved at varying times depending on the amount of echo removed by the echo canceller. More particularly, the present method involves constantly monitoring the error signal to the echo canceller and comparing it with the error signal that would be obtained if default coefficients were to be used instead of the current coefficients. This ensures that the default coefficients are upgraded each time the current set of coefficients is better than the saved default coefficients.
    • 确定何时在回波消除器中保存默认系数的方法,以便确保在当前条件下对应于最佳可能的回波消除的系数的捕获。 系数根据回波消除器所消除的回波量在不同时间被保存。 更具体地说,本方法包括不断监测回波消除器的误差信号,并将其与将要使用的缺省系数代替当前系数将获得的误差信号进行比较。 这确保了每当系数的当前系数优于保存的默认系数时,默认系数被升级。
    • 18. 发明申请
    • Method and apparatus for establishing and maintaining voice communication among a community of interest
    • 用于在感兴趣的社区之间建立和维持语音通信的方法和装置
    • US20030133544A1
    • 2003-07-17
    • US10339996
    • 2003-01-10
    • MITEL KNOWLEDGE CORPORATION
    • Hans Wasmeier
    • H04M001/64
    • H04M3/42314G06F8/314H04M3/42093H04M3/42365H04M3/42382H04M3/53308H04M3/53316H04M3/537H04M3/56H04M2201/38H04M2203/2044H04M2203/651H04M2203/652
    • Apparatus is provided for establishing and maintaining communication among a community of interest, comprising a plurality of communication devices for voice communication between users of the community of interest, each of the communication devices including a display for indicating communication availability of the users, a plurality of device agents for controlling respective ones of the communication devices in establishing the voice communication and updating each the display. A plurality of user agents is provided for maintaining user preferences. The user preferences include a list of the users of the community of interest. A tuple space is provided for exchanging tuples and anti-tuples between the user agents to monitor the communication availability, in response to which respective ones of the device agents update each respective display. A transient voice store is provided for receiving and storing a voice message from a first one of the users to a second one of the users with whom the first user is desirous of communicating and who is indicated on the display of the first user as being available for communication, whereupon the display of the second user is updated to indicate receipt of the voice message, and for playing the voice message to the second user. A communication switch is provided for establishing two-way communication between the users, whereby in response to the second user listening to the voice message and provided that the first use is available for communication a voice path is created in the communication switch between the first user and the second user, and in the event the first user is no longer available for communication the second user stores a voice message for the first user via the transient message store.
    • 提供了用于建立和维护感兴趣的社区之间的通信的装置,包括用于感兴趣社区的用户之间的语音通信的多个通信设备,每个通信设备包括用于指示用户的通信可用性的显示器,多个 设备代理,用于在建立语音通信并更新每个显示器时控制各个通信设备。 提供了多个用户代理来维护用户偏好。 用户偏好包括感兴趣的社区的用户的列表。 提供了一个元组空间,用于在用户代理之间交换元组和反元组以监视通信可用性,响应于哪个设备代理更新每个相应的显示。 提供了一种临时语音存储器,用于从第一用户接收和存储语音消息到与第一用户希望进行通信的用户中的第二用户以及在第一用户的显示器上指示为可用的语音消息 为了进行通信,因此第二用户的显示被更新以指示语音消息的接收,并且用于向第二用户播放语音消息。 提供通信交换机用于在用户之间建立双向通信,由此响应于第二用户监听语音消息并且提供第一用途可用于通信,在第一用户之间的通信交换机中创建语音路径 和第二用户,并且在第一用户不再可用于通信的情况下,第二用户经由瞬时消息存储为第一用户存储语音消息。