  The growing needs for high-quality video applications have resulted in a lot
of studies and developments in video signal coding. This chapter presents some
advanced techniques in enhancing the rate-distortion performance of the
block-based hybrid video coding systems. Additionally, as can be seen from the
developments of H.264/AVC and HEVC, most of the current coding tools, such as
prediction, transformation and entropy coding, have less room to improve in the
compression performance. On the other hand, loop filer in the modern video
standards shows the promising results. Thus, we believe that loop filter can be
the candidate in contributing to higher video compression for the
next-generation video coding. Specifically, improvements on ALF and SAO are
also introduced, and the simulation results show that the proposed methods
outperform the existing method, which offer new degrees of freedom to improve
the overall rate-distortion performance. As a result, they can be the candidate
coding tools for the next-generation video codec.
