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021_VideoCoding/VideoCodingReview.tex
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\section{Introduction}
\glsunset{h264}
\glsreset{hevc}
This chapter presents an overview of the H.265 - \ac{hevc}~\cite{H265StandardFeb2018} standard, focusing on the most relevant features of the encoding algorithm for the work developed in this thesis. The \ac{hevc} standard aims to address essentially all existing applications of \ac{h264}~\cite{H264AVCStandard2003}, extending it in two keys aspects: increased video resolution and increased use of parallel processing architectures. In order to increase the flexibility and follow the increase in the video resolution, the \ac{hevc} standard adopts a new block partition structure, as well as, new prediction modes. In this chapter these new techniques introduced are described, especially those which may have a significant impact in the error robustness characteristics of the \ac{hevc}.
This chapter describes the H.265~-~\ac{hevc}~\cite{H265StandardFeb2018} standard, focusing on the most relevant features of the encoding algorithm for the work developed in this thesis. The \ac{hevc} standard aims to address essentially all existing applications of \ac{h264}~\cite{H264AVCStandard2003}, extending it in two keys aspects: increased video resolution and increased use of parallel processing architectures. In order to increase the flexibility and follow the increase in the video resolution, the \ac{hevc} standard adopts a new block partition structure, as well as, new prediction modes. In this chapter these new techniques introduced are described, especially those which may have a significant impact in the error robustness characteristics of the \ac{hevc}.
%The standard also improves the intra~\cite{IntraCodingHEVC2012} and inter~\cite{MotionCodingHEVC2013} coding and includes new high-level features~\cite{HEVCHighLevelReferenceDez2012}. This chapter will describe main features and improvements introduced in the standard.
This chapter is organized as follows. Section~\ref{Section2:GeneraVideoSystem} introduced the functional blocks of a generic video coding system, and Section~\ref{Section2:Overview} provides the overview of the \ac{hevc} standard features. Subsequently, Section~\ref{Section2:HighLevel} describes the high-level features which are used to carry relevant information regarding the bitstream, Section~\ref{Section2:CodingStructures} describes the coding structures used to divide the video frames into smaller partitions and Section~\ref{Section2:PredictionModes} describes the main predictions techniques, namely intra and inter coding. Finally, a briefly description of the transform and quantisation, entropy coding and in-loop filters is given in Sections~\ref{Section2:TransformQuant}, \ref{Section2:Entropy} and \ref{Section2:Filters}, respectively. Section~\ref{Section2:Summary} concludes this chapter.
@@ -531,7 +532,7 @@ by adding an offset value, extracted from lookup tables transmitted by the encod
\section{Summary}
\label{Section2:Summary}
In this chapter we described the main features of the \glsfirst{hevc} standard, giving a special focus on the high-level features, coding structures and newly introduced prediction modes.
This chapter described the main features of the \glsfirst{hevc} standard, giving a special focus on the high-level features, coding structures and newly introduced prediction modes.
At the high-level \ac{hevc} introduces new \ac{nal} units types, not only for new signalling features but also for the new pictures types introduced. \ac{hevc} introduces new picture types to handle different types of random-access strategies, which allow more flexibility and higher coding efficiency, when compared to the random-access in previous standard such \ac{h264}.