Add new related work

022_ErrorResilience/RobustTransmissionReview.tex

@@ -145,7 +145,7 @@ In order to generate such reference frames the following can be applied
 where $\check f_n^i$  is a reference frame pixel, $\alpha$ is the leak factor, and $C$ is a constant value.
 The use of leaky predictions has been used in the past for error control especially in scalable video coding \cite{LeakyPredScalable2002}, where $C$ in Equation~(\ref{EQ2:LeakyPredConstant}) is replace by a lower layer error-free reconstruction. In case of single layer coding, the use of a constant value has significant impact on the coding efficiency leading to higher bitrate as shown in \cite{LeakyPredConstant1973}.
 
-In order to overcome the coding efficiency problem weighted prediction can be used with similar advantages. Since \ac{h264} motion compensation can be applied from two individual previously encoded frames and combined together to generate a single prediction for the current frame \cite{WeightedBiPred2005}.
+In order to overcome the coding efficiency problem weighted prediction can be used with similar advantages. Since \ac{h264} motion compensation can be applied from two individual previously encoded frames and combined together to generate a single prediction for the current frame \cite{WeightedBiPred2005}. In the case of \ac{hevc}, a method was proposed to force the use of dual inter-frame prediction~\ctie{DualFrameME2015} leading to lower error propagations.
 In case of leaky prediction instead of applying motion compensation is applied once, but with an interpolated frame obtained as follow:
 \begin{equation}\label{EQ2:LeakyPredDual}
  \check f_n^i = \alpha \hat f_n^i + (1- \alpha) \hat f_{n-1}^i.
@@ -276,11 +276,12 @@ For example, the primary picture may be coded with fine quantization, while the
 One the one hand if the primary picture is received, the redundant information is discarded.
 One the other hand if errors occur and the primary picture is lost, the redundant one is used to provide a lower level of reconstructed quality and contain the error propagation.
 
-Zhu \emph{et al.} investigated the paradigm of redundant picture coding in \ac{h264} standard~\cite{RedudantPicsJan2009}.
-Different approaches were investigated in order to achieve a mixed method based on both reference picture selection to obtain a clean decoding without error propagation and a hierarchical allocation of the redundant pictures to increase the error robustness.
-Redundant pictures achieve good performance under error prone conditions, since they introduce secondary pictures that can be decoded when the primary picture is not available.
+Zhu \emph{et al.} investigated the paradigm of redundant picture coding in \ac{h264} standard~\cite{RedudantPicsJan2009}. 
+Different approaches were investigated in order to achieve a mixed method based on both reference picture selection to obtain a clean decoding without error propagation and a hierarchical allocation of the redundant pictures to increase the error robustness. In~\cite{VPxResiliencePCS2016} the key frames are encoded and transmitted at lower bitrate to be used in case of error to replace the missing frame. 
+Redundant pictures achieve good performance under error prone conditions, since they introduce secondary pictures that can be decoded when the primary picture is not available. 
 
-Moreover, redundant pictures might also work as localisation techniques when different reference frames are selected. However, such approaches generate large amount of redundant data and overheads. In~\cite{RedundantMVsJune2008} a newer approach was proposed to reduce the amount of information in the redundant pictures of the \ac{h264} standard, by introducing only redundant \acs{mv}. This approach increases the overall system performance by presenting an efficient trade-off between the resultant bitrate and the error robustness.
+Moreover, redundant pictures might also work as localisation techniques when different reference frames are selected. However, such approaches generate large amount of redundant data and overheads. In~\cite{RedundantMVsJune2008} a newer approach was proposed to reduce the amount of information in the redundant pictures of the \ac{h264} standard, by introducing only redundant \acs{mv}. This was also used in~\cite{VPxResilience2016}, where the motion information is used to recover the missing frame.
+These approaches increases the overall system performance by presenting an efficient trade-off between the redundant bitrate and the error robustness.
 
 \subsection{Multiple description coding}