By Haohong Wang, Lisimachos Kondi, Ajay Luthra, Song Ci
A finished presentation of the video communique ideas and structures, this booklet examines 4G instant structures that are set to revolutionise ubiquitous multimedia communication.4G instant Video Communications covers the basic concept and appears at structures’ descriptions with a spotlight on electronic video. It addresses the most important issues linked to multimedia verbal exchange on 4G networks, together with complex video coding criteria, mistakes resilience and mistake concealment strategies, in addition to complicated content-analysis and variation ideas for video communications, cross-layer layout and optimization frameworks and techniques. It additionally offers a high-level evaluate of the electronic video compression average MPEG-4 AVC/H.264 that's anticipated to play a key position in 4G networks.
Material is gifted logically permitting readers to show on to particular attractions. the 1st half the e-book covers primary conception and platforms, whereas the second one part strikes onto complex options and functions. This publication is a well timed mirrored image of the most recent advances in video communications for 4G instant systems.
- One of the 1st books to check the most recent video communications advancements for rising 4G instant systems
- Considers demanding situations and methods in video supply over 4G instant systems
- Examines process structure, key strategies and comparable criteria of complicated instant multimedia applications
- Written from either the viewpoint of and academia
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Extra info for 4G Wireless Video Communications
264/AVC, many error resilience features have been adopted: • Slice structured coding, in which slices provide resynchronization points (slice header) within a video frame and the encoder can determine the location of these points on any macroblock boundary. • Arbitrary slice ordering, in which the decoding order of the slices may not follow the constraint that the address of the first macroblock within a slice is increasing monotonically within the NAL unit stream for a picture. • Slice data partition, in which the slice data is partitioned into three parts: header, intra and inter-texture data.
In other words, under 4G Wireless Video Communications Haohong Wang, Lisimachos P. Kondi, Ajay Luthra and Song Ci © 2009 John Wiley & Sons, Ltd. ISBN: 978-0-470-77307-9 20 Wireless Communications and Networking a certain τd , increasing the transmission symbol rate R will cause more serious ISI. Therefore, a channel equalizer should be adopted in order to alleviate the averse impact of ISI on throughput performance. According to [1, 2], in indoor and micro-cellular channels, delay spread is usually small (less than several hundred nanoseconds).
264/AVC are provided in Chapter 5. 3 Error Resilience Although the video compression algorithms mentioned above can achieve a very high coding efficiency, the resulted compressed video streams are very vulnerable to errors in error-prone communications networks owing to the coding scheme that used. For example, the desynchronization errors caused by VLC coding and propagation errors caused by predictive coding make error handling very difficult. In lossy wireless networks, error resilient techniques  can significantly increase the system’s robustness by using one of the following methods: encoder error resilience tools, decoder error concealment, as well as techniques that require cooperation bewteen encoder, decoder and the network.