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Invention Grant
CN103796135B 具有回声消除的动态扬声器管理 有权

具有回声消除的动态扬声器管理
Abstract:
一种回声消除系统包括动态扬声器管理(DSM)模块、电流/电压感测放大器、声压级(SPL)模型模块以及回声消除器。该示例性DSM模块可接收远端信号，并用于生成修正的远端信号和多个参数输出。示例性的电流/电压感测放大器耦合到该修正的远端信号，并生成放大器输出、电压(V)参数输出和电流(I)参数输出。示例性的声压级(SPL)模型模块耦合到DSM模块的多个参数输出，并用于生成预测的SPL。该示例性的回声消除器模块响应于预测的SPL和近端信号，并用于生成回声消除输出信号。
Abstract(English):

A system for echo cancellation includes a dynamic speaker management (DSM) module, a current/voltage sensing amplifier, a sound pressure level (SPL) model module and an echo canceller. The example DSM module is receptive to a far-end signal and is operative to develop a modified far-end signal and a plurality of parameter outputs. The example current/voltage sensing amplifier is coupled to the modified far-end signal and develops an amplifier output, a voltage (V) parameter output, and a current (I) parameter output. The example sound pressure level (SPL) model module is coupled to the plurality of parameter outputs of the of the DSM module and is operative to develop a predicted SPL. The example echo canceller module is responsive to the predicted SPL and to a near-end signal and operative to develop an echo-canceled output signal.

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