By Ce Zhu, Yuenan Li
Wireless video communications surround a wide diversity of matters and possibilities that function the catalyst for technical ideas. To disseminate the newest advances during this demanding but fascinating box, Advanced Video Communications over instant Networks presents an in-depth examine the basics, contemporary technical achievements, demanding situations, and rising developments in cellular and instant video communications.
The editors have conscientiously chosen a panel of researchers with services in different features of instant video verbal exchange 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 useful 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 e-book offers a suite of tutorials, surveys, and unique contributions, supplying an up to date, available reference for extra improvement of study and purposes in cellular and instant video verbal exchange platforms. the diversity of assurance and intensity of craftsmanship make this publication the go-to source for dealing with present and destiny demanding situations during this field.
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Extra info for Advanced video communications over wireless networks
Because of the performance loss of extrapolation compared to interpolation, techniques based on interpolation are far more common in the literature. The techniques described in the remainder of this chapter will therefore apply to interpolation unless explicitly stated otherwise. 3 Encoder-Aided Techniques Estimating the true motion between the reference frames and performing accurate interpolation or extrapolation of this motion has been shown to be a difficult task. , involving rapid motion, deformation, occlusion) the side information can often be of poor quality, reducing significantly the compression performance.
1 Frame-Level Interpolation Strategies Most systems in the literature use already decoded frames to generate one side information frame through interpolation. This strategy requires changing the decoding order so that at least one past and one future frame (in display order) are available at the time of generating the side information. For example, the frame sequence I1 − W2 − W3 − W4 − I5, with key frames denoted I and WZ frames denoted W, can be decoded in the following order: I1 − I5 − W3 − W2 − W4 − … In this example, the side information for W2 can be generated using one decoded frame from the past (in display order), that is, I1, and two from the future, namely W3 and I5.
26]. 60 dB). 49 dB, which happens for the Mobile and Calendar sequence encoded at 896 kbit/s and a PLR of 5%. Notice, however, that the scheme in Ref.  cannot guarantee that all MBs will eventually be refreshed, which is a major drawback for real usage in 24 Advanced Video Communications over Wireless Networks error-prone environments, such as mobile networks. On the other hand, the one described in this chapter can, not only overcome this drawback, but it does so fully automatically, without any user intervention.