ABSTRACT
This chapter explores various kinds of multimedia information with each other in any place, at any time, and using any device. Digital image and video data undoubtedly form the major trunk of the digital multimedia world. Image and video coding is also needed in many other applications, such as image/video storage, search, and retrieval; multimedia databases/libraries; video streaming over the Internet, geographic image transmission via satellites, video phone and video conferencing, and so on. Quantization is then applied to the discrete cosine transform (DCT) coefficients to convert them into integers. Uniform quantization with an optional dead zone is applied to each coefficient. The quantized DCT coefficients are then scanned in a zigzag order to convert the two-dimensional data into one-dimensional data. Different from the traditional differential pulse-code modulation-based prediction techniques, some new intraprediction techniques make use of some well-known features in a typical video frame: many visual patterns exhibit a strong directionality.
