Graphics Reference
In-Depth Information
Unequal error protection (UEP) method for backward compatible 3-D video transmission
over WiMAX s proposed by the author in
[133].
The allocation of transmission power is
varied to support unequal error protection for colour plus depth video. Even though the
quality is optimized in this approach the transmission power can also be optimized with
the proposed method. Furthermore, this method can also be extended to multi-view video
applications. For example, selected number of views can be highly protected based on the
user's head position. In addition, the use of transmission power to provide unequal protec-
tion would be more suitable for multi-view applications, because adding redundancies for
protectionmaynotbethebestwaytoprovideprotectionduetothehighbandwidthdemand
of these applications.
3-D video distribution in a home environment is also addressed by the authors in
[132].
A
prioritization schemeisproposedfor3-Dvideodistributionoverwirelessnetworkbasedon
theirimportancetowards betterperceptualquality
[132].
Thisworkcanbefurtherextendedto
optimize3-Dvideoqualityadaptively basedonthetypeofnetworktrafficinthepremises.For
instance,whenthereisnotmuchvideotraffic,bothcolouranddepthstreamscanbemapped
to a high priority traffic class whereas depth stream is mapped to a lower priority traffic
class compared to that of the colour stream when the network is floodedwithvideotraffic.
Themulti-view plusdepthvideodistributioncanalsobeprioritizedbased on the proposed
prioritization scheme. For example, the important views which are necessary to be ableto
render other views can be allocated a higher priority traffic class to optimize the rendered
3-D videoquality.
Depth error concealment algorithm is proposed for colour plus depth stereoscopic video
by the author in
[131].
This method exploits the existing correlation between colour and
depthmapsequences.Themotioncorrelationbetweencolouranddepthmapframesmaynot
be high at all time instances. Therefore, the proposed method can be joined with conven-
tional frame concealment algorithms (e.g. frame copy) to achieve better results. Accurate
depth maps are required to render novel views in multi-view plus depth 3-D video. Hence,
the proposed method can be utilized to render good quality novel views for multi-view
applications.