The term “encoding” refers to the process of transforming a raw/uncompressed image and/or video file into a compressed form, through exploitation of spatial-temporal redundancies. Decoding is the reverse process, i.e., the retrieval of the original files through the encoded ones.
Published in Chapter:
Rate Adaptation Mechanisms for Multimedia Streaming
Charalampos Patrikakis (Telecommunications Laboratory School of Electrical and Computer Engineering, NTUA, Greece), P. Fafali (NTUA, Greece), Pantelis N. Karamolegkos (Telecommunications Laboratory School of Electrical and Computer Engineering, NTUA, Greece), Y. Despotopoulos (NTUA, Greece), and N. Minogiannis (NTUA, Greece)
Copyright: © 2008
|Pages: 7
DOI: 10.4018/978-1-59140-993-9.ch064
Abstract
During the last decade, multimedia streaming has experienced explosive growth. Adaptive video has become a necessity for meeting stringent QoS requirements in non-guaranteed IP networks. Since the user is the final point in the multimedia distribution chain, transmission rate must be adjusted to match the requirements set, the end-to-end effective bandwidth, and the capabilities of the terminals used to access the services offered. In addition, the concept of pervasive and ubiquitous computing has increased the need for rate adaptation so as to fulfill the restrictions posed by mobile terminals (e.g., phones and handhelds). The ultimate goal is the optimization of the subjective audio-visual quality.