The topic of my talk was "structures in video coding". I explained how video codec structures have evolved from simple, repetitive 16x16 macroblocks in early standards such as MPEG-1....
..... to complex hierarchies of blocks in recent standards such as HEVC:
I examined the effects of increasingly complex block structures. These changes have led to dramatic improvements in compression performance but also increasing computational demands. I left the audience with a question: after 25+ years of intensive research and development, why do mainstream video codecs still rely on rectangular block structures?
- Iain Richardson