在数字信号处理中，滤波占有极其重要的地位。数字滤波是语音处理、图像处理、模式识别、频谱分析等应用中的基本处理算法。用DSP芯片实现数字滤波除了具有稳定性好、精确度高、不受环境影响等优点外，还具有灵活性好等特点。-In digital signal processing, filtering an extremely important position. Digital filter is the voice processing, image processing, pattern recognition, spectrum analysis, the application of the basic processing algorithms. DSP chip used in addition to digital filter has good stability, high accuracy, free from environmental impact, etc., but also the characteristics of good flexibility.