By Yo Sung Ho
This booklet goals to collect contemporary advances and functions of video coding. All chapters should be helpful for researchers, engineers, graduate and postgraduate scholars, specialists during this zone, and optimistically additionally for those that are commonly attracted to video coding. The ebook comprises 9 rigorously chosen chapters. The chapters care for complex compression suggestions for multimedia functions, touching on contemporary video coding criteria, excessive potency video coding (HEVC), a number of description coding, sector of curiosity (ROI) coding, form repayment, errors resilient algorithms for H.264/AVC, wavelet-based coding, facial video coding, and implementations. This publication presents numerous valuable rules in your personal study and is helping to bridge the distance among the elemental video coding recommendations and functional multimedia functions. we are hoping this ebook is pleasant to learn and may extra give a contribution to video coding.
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Extra resources for Advanced Video Coding for Next-Generation Multimedia Services
Suppose that a given video source requires R b/s to be encoded by a single encoder. On the other hand, if for the same video source, the first description of the MD coding scheme requires R1 b/s and the second description requires R2 b/s. The bit rate efficiency is defined as Reff = R - ( R1 + R2) R (27) The bit rate efficiency Reff is defined so that the performance of the proposed MD coding scheme is compared with the original video encoder in terms of the required bit rate. Thus, if the MD video coding scheme can encode both side videos with total bit rate (R1+R2) ≤ R then the bit rate efficiency Reff will be positive and the MD coding is outperforming the original encoder.
There are an 2m - 1 of decoders in an m-channel MD coding schemes, that is, a central decoder and 2m side decoders (Ostergaard, 2007). In the MDCLVQ, a two channel MD coding scheme is used. Thus, there are three decoders: the central decoder, side decoder 1, and side decoder 2. At the receiver, if both descriptions are received correctly, then the central decoder is used to map the labels back to the original lattice points. The side decoders are used to find an approximation of the original lattice point if only one single description is received.
In the MD coding system, there is always a tradeoff between the required bit rate and the distortion. Thus, in MD coding scheme, compression efficiency is sacrificed in order to gain error resiliency. Therefore, MD coding should be applied only if it does not require too extra bit rate or a wider bandwidth (Goyal, 2001). 2. Elementary of lattices In mathematics (algebra), a lattice is defined as a partially ordered set (poset) in which any two elements have a unique supremum (the element’s least upper bound or join) and an infimum (greatest lower bound or meet).
Advanced Video Coding for Next-Generation Multimedia Services by Yo Sung Ho