Advanced video communications over wireless networks by Ce Zhu, Yuenan Li

By Ce Zhu, Yuenan Li

Wireless video communications surround a wide variety of concerns and possibilities that function the catalyst for technical techniques. To disseminate the latest advances during this tough but intriguing box, Advanced Video Communications over instant Networks presents an in-depth examine the basics, fresh technical achievements, demanding situations, and rising tendencies in cellular and instant video communications.

The editors have rigorously chosen a panel of researchers with services in various features of instant video conversation to hide a large spectrum of issues, together with the underlying theoretical basics linked to instant video communications, the transmission schemes adapted to cellular and instant networks, caliber metrics, the architectures of sensible platforms, in addition to a few novel instructions. They deal with destiny instructions, together with Quality-of-Experience in instant video communications, video communications over destiny networks, and 3D video communications.

The ebook provides a set of tutorials, surveys, and unique contributions, delivering an updated, obtainable reference for extra improvement of study and purposes in cellular and instant video verbal exchange structures. the variety of insurance and intensity of craftsmanship make this booklet the go-to source for dealing with present and destiny demanding situations during this field.

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26]). After extensive experimentation, it was found that the parameters a, b, and c can be considered more or less independent of the sequence, which means that a single set of parameters could be used for three different video sequences with a low fitting error. 2, can be well represented only by the bit rate rb. As explained in Ref. [26], the parameters a, b, and c could be obtained by considering four packet loss rates and two different bit rates for three different sequences, corresponding to a total of 24 ( rb , PLR) pairs, with the iterative Levenberg–Marquardt method [32,33].

The determined order is then cyclically followed with the computed number of MBs being refreshed in each frame. Therefore, the complete network-aware MB intracoding refresh (NIR) scheme (which was initially proposed in Ref. [27]) can be briefly described by the following steps in terms of encoder operation: Step 1. Obtain the PLR value through network feedback. Step 2. 14 and rounding it to the nearest integer. Step 3. 2. Step 4. For each MB in a frame, check if it should be forced to intra mode according to the CIR order and the determined number of CIR MBs per frame; if not, perform intra/inter mode decision using the αRD value computed in Step 3; encode the MB with selected mode.

To simulate the network conditions, three different PLRs were considered: 1%, 5%, and 10%. Since each slice is mapped to one RTP packet, each lost packet will correspond to a lost video slice. Packet losses are considered independent and identically distributed. 264/AVC reference software [25,28]. The presented results correspond to PSNR averages of these 50 different runs for the luminance component (PSNR Y). 4 for the Mother and Daughter, Foreman, and Mobile and Calendar video sequences, respectively.

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