By Haohong Wang, Lisimachos Kondi, Ajay Luthra, Song Ci

A accomplished presentation of the video conversation innovations and structures, this ebook examines 4G instant platforms that are set to revolutionise ubiquitous multimedia communication.4G instant Video Communications covers the basic thought and appears at platforms’ descriptions with a spotlight on electronic video. It addresses the most important themes linked to multimedia communique on 4G networks, together with complicated video coding criteria, errors resilience and blunder concealment ideas, in addition to complicated content-analysis and edition options for video communications, cross-layer layout and optimization frameworks and strategies. It additionally presents a high-level review of the electronic video compression normal MPEG-4 AVC/H.264 that's anticipated to play a key function in 4G networks.

Material is gifted logically permitting readers to show on to particular sights. the 1st 1/2 the e-book covers primary idea and structures, whereas the second one part strikes onto complex ideas 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 review 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 thoughts and comparable criteria of complex instant multimedia applications
  • Written from either the point of view of and academia

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Extra resources for 4G Wireless Video Communications

Sample text

Garcia-Frias et al. proposed the hidden Markov model [11] for a more general channel model not only for characterizing Rayleigh fading channels but also for characterizing frequency-selective fading channels. Swarts et al. [10] and Wang et al. [12, 13] evaluated and validated their finite-state Markov models in order to characterize the Rayleigh fading channel. 2 shows a typical finite-Markov model characterizing the Rayleigh fading channel used in adaptive modulation and coding research [14]. In this channel model, each state represents a stationary BSC channel with a constant bit error rate.

264/AVC so as to replace the popular 8 × 8 DCT transform, which will not cause inverse-mismatch; smaller size transform seldom causes ringing artifacts and requires less computation. 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.

Gilbert [7] originally proposed a model based on a two-state Markov model inspired by the fact that burst errors occurred in poor telephone channels. In his work, one state represents the channel in inter-burst state and the other represents the channel in burst state. In the good state, there is error-free; in the bad state, the channel performs as a binary symmetric channel (BSC). Elliott [8] modified this model by changing the good state from error-free BSC to a nonzero crossover probability.

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