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1、第一章系统：system 信号：signal 模拟信号：analog signal 数字信号：digital signal模/数转换：analog-to-digital conversion 频谱：spectrum数字滤波：digital filtering 滤波器：filter采样：sample 保持：hold数字代码：digital code 量化电平： quantization level时域：time domain 频域：frequency domain低频：low frequency 高频：high frequency低通滤波器：low pass filter 高通滤波器：high
2、pass filter带通滤波器：band pass filter 带阻滤波器：band stop filter零阶保持信号:zero order hold signal 平滑：smooth采样周期：sampling period 频率分量:frequency elements图像处理：image processing 传感器：sensor电压：voltage 电流：current第二章anti-imaging filter 抗镜像滤波器 sampling interval 采样间隔=sampling period 采样周期sampling frequency 采样频率=sampling ra
3、te 采样速率sampling theorem 采样定理Nyquist sampling rate 奈奎斯特采样率 Nyquist frequency 奈奎斯特频率 Nyquist range 奈奎斯特范围oversampling 过采样 undersampling 欠采样quantization step 量化步长 quantization noise量化噪声bit rate 比特率 anti-aliasing filter 抗混叠滤波器第三章数字函数：digital function 合成函数：composite function二维数字信号：two-dimensional digital
4、 signal语音信号：speech signal 量化方案：quantization scheme脉冲函数：impulse function 单位脉冲函数：unit impulse function 阶跃函数：step function 幂函数:power function指数函数: exponential function 正弦函数：sine function余弦函数：cosine function 复平面：complex plain欧拉恒等式：Eulers identity 模拟频率：analog frequency数字频率:digital frequency 采样间隔：sampling
5、 interval相移：phase shift 像素：pixel灰度级：gray scale第四章roll-off 滚降 gain 增益pass band 通带 stop band 阻带bandwidth 带宽 linear system 线性系统superposition 叠加原理 time-invariant 时不变causal system因果系统 difference equation差分方程filter coefficient滤波器系数 recursive filter 递归滤波器nonrecursive filter 非递归滤波器 finite word length effect
6、有限字长效应impulse response 脉冲响应infinite impulse response （IIR)无限脉冲响应finite impulse response (FIR)有限脉冲响应moving average filter 滑动平均滤波器step response 阶跃响应第六章z transform z变换 region of convergence 收敛域inverse z transform 逆z变换 transfer function 传输函数partial fraction expansion 部分分式展开cover-up method 覆盖法 zero 零点 po
7、le 极点marginally stable 临界稳定 unstable 不稳定第七章傅立叶变换：Fourier Transform 滤波器形状：filter shape频率响应:frequency response 频率特性：frequency characteristics离散时间傅立叶变换：Discrete Time Fourier Transform幅度响应：magnitude response 相位响应：phase response传输函数：transfer function 相位差：phase difference采样频率：sampling frequency第八章white no
8、ise 白噪声 magnitude spectrum 幅度频谱phase spectrum 相位频谱discrete Fourier series（DFS)离散傅里叶级数第九章有限脉冲响应滤波器：finite impulse response filter无限脉冲响应滤波器：infinite impulse response filter相位失真：phase distortion 理想低通滤波器：idle low pass filter窗函数：window function 稳定性：stability通带波纹：pass band ripple 阻带波纹：stop band ripple通带边缘
9、频率:pass band edge frequency过渡带宽度：transition width 矩形窗：Rectangular Window汉宁窗：Hanning Window 哈明窗:Hamming Window布莱克曼窗:Blackman Window 凯塞窗:Kaiser Window项数:number of terms 衰减:attenuation增益:gain 采样频率:sampling frequency第十章infinite impulse response filter(IIR)无限脉冲响应滤波器bilinear transformation 双线性变换 prewarping equation 预扭曲方程Butterworth filter 巴特沃斯滤波器Chebyshev Type I filter 切比雪夫I 型滤波器Chebyshev Type II filter 切比雪夫II 型滤波器elliptic filter 椭圆滤波器Impulse invariance method 脉冲响应不变法5