值预测是通过推断执行来提高ILP的有效技术之一，但实现其预测模型的硬件成本和功耗却是制约它的两个主要因素。
Value prediction is one of the effective techniques that increase ILP by speculative execution, but its hardware cost and power consumption are two main limitations.
回波消除中的自适应滤波研究结果表明：（1）由于受到硬件和自适应算法本身的制约，要从根本上提高回波消除中自适应滤波效果，选用新的硬件和新的算法是重要途径。
The results show that: (1) In order to improve the effect of adaptive filtering in acoustic echo canceling, the important path is to adopt new hardware and new algorithm.
SCA系统里定义的设备接口能屏蔽硬件功能实现的细节，使上层波形应用的开发摆脱底层硬件特性的制约。
The device interface defined in SCA system can shield the details of hardware function implementation and release the toplevel waveform application development from bottom hardware restriction.
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