  An important concept in wireless systems has been quality of experience
(QoE)-aware video transmission. Such communications are considered not only
connection-based communications but also content-aware communications, since
the video quality is closely related to the content itself. It becomes
necessary therefore for video communications to utilize a cross-layer design
(also known as joint source and channel coding). To provide efficient methods
of allocating network resources, the wireless network uses its cross-layer
knowledge to perform unequal error protection (UEP) solutions. In this article,
we summarize the latest video transmission technologies that are based on
scalable video coding (SVC) over multiple-input multiple-output (MIMO) systems
with cross-layer designs. To provide insight into video transmission in
wireless networks, we investigate UEP solutions in the delivering of video over
massive MIMO systems. Our results show that in terms of quality of experience
(QoE), SVC layer prioritization, which was considered important in the prior
work, is not always beneficial in massive MIMO systems; consideration must be
given to the content characteristics.
