Image and Videl Comoression P14

In this chapter, we introduce the fundamentals of digital video coding which include digital video representation, rate distortion theory, and digital video formats. Also, we give a brief overview of image and video coding standards which will be discussed in the subsequent chapters. 15.1 DIGITAL VIDEO REPRESENTATION As we discussed in previous chapters, a digital image is obtained by quantizing a continuous image both spatially and in amplitude. Digitization of the spatial coordinates is called image sampling, while digitization of the amplitude is called gray-level quantization. Suppose that a continuous image is denoted by g(x, y), where the amplitude or value of...