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    • 32. 发明授权
    • Client-side echo cancellation for multi-party audio conferencing
    • 客户端回声消除多方音频会议
    • US08005023B2
    • 2011-08-23
    • US11763224
    • 2007-06-14
    • Junlin LiLi-wei HeDinei Florencio
    • Junlin LiLi-wei HeDinei Florencio
    • H04L12/16H04B3/20
    • H04L12/16
    • A “Client-Side Echo Canceller” provides a unique system and method for reducing Multipoint Control Unit (MCU) computational overhead in a multi-point audio conference. In general, the local audio input signal of each client is transmitted in real-time to the MCU. The MCU then combines the audio input signals of all clients to create a single composite signal that is transmitted back to all clients in real-time. Each client then locally processes the composite signal to remove each client's local contribution to the composite signal prior to local playback in order to eliminate a local echo of each client's local audio input. In various embodiments, local cancellation of the local audio input from the composite signal is performed on either a time domain or a transform domain representation of the composite signal. Further, since each client receives the same signal, MCU transmission bandwidth can be reduced via multicast transmissions.
    • “客户端回声消除器”提供了一种用于在多点音频会议中减少多点控制单元(MCU)计算开销的独特系统和方法。 通常,每个客户端的本地音频输入信号实时传输到MCU。 然后,MCU组合所有客户端的音频输入信号,以创建单个复合信号,并将其实时传输回所有客户端。 然后,每个客户端本地处理复合信号以在本地回放之前去除每个客户端对复合信号的局部贡献,以便消除每个客户端的本地音频输入的本地回波。 在各种实施例中,在复合信号的时域或变换域表示上执行来自复合信号的本地音频输入的局部消除。 此外,由于每个客户端接收到相同的信号,所以可以通过多播传输来减少MCU传输带宽。
    • 33. 发明申请
    • Load-Balancing Structure for Packet Switches and Its Constructing Method
    • 分组交换机的负载平衡结构及其构建方法
    • US20110176425A1
    • 2011-07-21
    • US12739729
    • 2009-10-31
    • Hui LiWei HeShuoyan LiJiaqing HuangJian ChenKai PanShuxin ZhangPeng YiBinqiang Wang
    • Hui LiWei HeShuoyan LiJiaqing HuangJian ChenKai PanShuxin ZhangPeng YiBinqiang Wang
    • H04L12/26
    • H04L49/101H04L49/552
    • This invention provides a load-balancing structure for packet switches and its constructing method. In this method, the structure based on self-routing concentrators is divided into two stages, that is, a first stage and a second stage fabric. A virtual output group queue (VOGQ) is appended to each input group port of the first stage fabric, and a reordering buffer (RB) is configured behind each output group port of the second stage fabric. Packets stored in the VOGQ are combined into data blocks with preset length, which is divided into data slices of fixed size, finally each data slice is added an address tag and is delivered to the first stage fabric for self-routing. Once reaching the RB, data slices are recombined into data blocks. This invention solves the packet out-of-sequence problem in the load-balancing Birkhoff-von Neumann switching structure and improves the end-to-end throughput.
    • 本发明提供了分组交换机的负载平衡结构及其构造方法。 在这种方法中,基于自路由集中器的结构分为两个阶段,即第一阶段和第二阶段结构。 将虚拟输出组队列(VOGQ)附加到第一级结构的每个输入组端口,并且在第二级结构的每个输出组端口之后配置重新排序缓冲器(RB)。 存储在VOGQ中的数据包被组合成具有预设长度的数据块,其被划分为固定大小的数据片段,最后每个数据片段添加地址标签,并且被递送到第一级结构以进行自路由。 一旦到达RB,数据切片被重新组合成数据块。 本发明解决了负载平衡Birkhoff-von Neumann交换结构中的分组失序问题,提高了端到端吞吐量。