Video Compression - Signal Processing Systems - page 63

Fig. 21 Example of MVC hierarchical-B coding structure with the extension of inter-view
prediction. The horizontal direction represents different time slots and the vertical direction
represents different views. Redrawn from [ 15 ]

the following frames in the same view. The concept of MPEG-2 MVP is simple,
and the only additional functional block is a processing unit of syntax element in
entropy coding. However, MPEG-2 MVP can not provide the good coding efficiency
because the prediction tool defined in MPEG-2 is poor compared with the state-of-
the-art coding standard such as H.264/AVC [ 7 ] .
In recent years, MPEG 3D Audio/Video (3DAV) group has worked toward the
standardization for MVC [ 17 ] which adopts H.264/AVC as the base layer due to its
outstanding coding performance. The hybrid ME and DE inter prediction technique
is also adopted. To further improve the coding performance, MVC extends the
original hierarchical-B coding structure to inter-view prediction for multiview video
sequences as shown in Fig. 21 . The bitrate can be saved up to 50%, but it depends
on the characteristics of multiview video sequences [ 15 ] .

4 Conclusion

With the improvement of video sensor and display technologies, more and more
video applications are emergent. Due to the limited capacity of storage devices
and communication channels, video compression plays a key role to drive the
applications. H.264/AVC is the most important coding standard in recent years due
to its outstanding coding performance. Some other coding standards like Scalable
Video Coding (SVC) and Multiview Video Coding (MVC) are developed based on
H.264/AVC and add some specific coding tools targeting at their own applications.
The demands for video services with better visual quality will keep go on. Therefore,
video coding systems for super high resolution, high frame rate, high dynamic
range, and large color gamut will also be developed in the near future.