信号举例( 2) 心电图 Represent the electrical activity of the heart 2017/10/11 数字信号处理 7
信号举例 (2) 心电图 - Represent the electrical activity of the heart 2017/10/11 数字信号处理 7
信号举例 (3) 脑电波 Represent the electrical activity caused by the random firings of billions of neurons in the brain wwn2c2m-mlpowjifrniw-luif 2017/10/11 数字信号处理
信号举例 (3) 脑电波 - R t th l t i l ti it d b Represent the electrical activity caused by the random firings of billions of neurons in the brain 2017/10/11 数字信号处理 8
信号举例( 4) 黑白照片 -Represents light intensity as a function of two spatial coordinates Kx.y) 2017/10/11 数字信号处理
信号举例 (4) 黑白照片 - R t epresents li ht i t it light intensity as a f ti f unction of two spatial coordinates 2017/10/11 数字信号处理 9
信号举例 (5) 视频信号Video signals Consists of a sequence of images,called frames,and is a function of 3 variables: 2 spatial coordinates and time Frame I Frame 3 Frame 5 2017/10/11 数字信号处理 10
信号举例 (5) 视频信号 Video signals - Consists of a sequence of images called Consists of a sequence of images, called frames, and is a function of 3 variables: 2 spatial coordinates and time 2017/10/11 数字信号处理 10
信号的获取方式 ■可以通过采集,从自然界获取; ■可以是信号处理的输出结果; ■可以人工合成。 2017/10/11 数字信号处理 11
信号的获取方式 可以通过采集 ,从自然界获取 ; 可以是信号处理的输出结果 ; 可以人工合成。 2017/10/11 数字信号处理 11