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    • 61. 发明授权
    • Method and apparatus for improving voice band data (VBD) connectivity in a communications network
    • 用于改善通信网络中的语音频带数据(VBD)连接性的方法和装置
    • US07646763B2
    • 2010-01-12
    • US10961616
    • 2004-10-08
    • David Cheng-Song QiYan WangTimothy G. Wade
    • David Cheng-Song QiYan WangTimothy G. Wade
    • H04L12/66
    • H04L12/66
    • High compression rate codecs in gateways servicing Voice-over-Internet Protocol (VoIP) and Voice Band Data (VBD) calls distort modem/fax Answer Back Tones (e.g., 2100 Hz), which may lead to signal distortion and call hang-ups. To prevent such occurrences, a method or corresponding apparatus forces originating and terminating gateways to stay in a low complexity non-voice compression codec (e.g., ITU G.711) after prenegotiating a high complexity, voice compression codec (e.g., G.729 or G.726) during a short beginning period of a voice call. The low complexity codec avoids distorted answer back tone leakage associated with previous solutions that use a notch filter to block the leakage, thereby significantly improving the success rate of a VBD call by completely eliminating modem answer back tone distortion caused by high complexity codecs that use voice compression and by completely eliminating use of the notch filter.
    • 通过互联网语音协议(VoIP)和语音频带数据(VBD)的网关中的高压缩率编解码器调用可能导致信号失真和呼叫挂断的调制解调器/传真回答音(例如,2100 Hz)。 为了防止这种情况发生,在预先谈判高复杂度的语音压缩编解码器(例如G.729或者G.711)之后,方法或相应的装置强制发起和终止网关停留在低复杂度的非语音压缩编解码器(例如,ITU G.711) G.726)在语音通话的短的开始阶段。 低复杂度编解码器避免了与使用陷波滤波器阻止泄漏的以前解决方案相关的失真回答音泄漏,从而通过完全消除由使用语音的高复杂度编解码器引起的调制解调器应答回音失真,从而显着提高了VBD呼叫的成功率 并通过完全消除陷波滤波器的使用。
    • 65. 发明授权
    • Method and system for optimizing a software-defined radio system
    • 用于优化软件定义无线电系统的方法和系统
    • US07571205B2
    • 2009-08-04
    • US11173131
    • 2005-07-01
    • Jasmin OzEran PisekYan Wang
    • Jasmin OzEran PisekYan Wang
    • G06F13/00
    • G06F15/16
    • A method for optimizing a software-defined radio system comprising a plurality of processors is provided. The method includes, for each of the plurality of processors, (i) providing an input burst comprising a first specified burst size, M, of input words to the processor for each of a plurality of configurations, each input word comprising an integer, and (ii) receiving from the processor an output burst comprising a second specified burst size, N, of output words generated by the processor based on the M input words for each of the configurations. An optimization factor is determined for each of the configurations based on the N output words generated by each processor for the configuration. An optimized configuration is identified from the plurality of configurations based on the optimization factor of each of the configurations.
    • 提供了一种用于优化包括多个处理器的软件定义的无线电系统的方法。 所述方法包括对于所述多个处理器中的每一个,(i)为多个配置中的每一个提供包括输入字的第一指定突发尺寸M到输入字的输入脉冲串,每个输入字包括整数,以及 (ii)从处理器接收输出脉冲串,其包括由处理器基于每个配置的M个输入字产生的输出字的第二指定突发大小N。 基于由每个处理器为该配置生成的N个输出字,为每个配置确定优化因子。 基于每个配置的优化因素,从多个配置中识别出优化的配置。