This Experiment document includes descriptions of investigations of coding modules in IVC test model plus (ITM+), to be performed for the April 2017 MPEG meeting. The experiments are divided into 4 subtests. In subtest 1, encoder optimization techniques will be explored. In subtest 2, methods for B frame coding will be explored. In subset 3, methods for large block structure will be explored. In subset 4, bi-directional prediction will be further explored.
In the January 2017 MPEG meeting, test model 16.0 (ITM16.0) for IVC was extended by a branch (ITM+) containing coding tools for possible future extensions of IVC. OBMC and bi-directional prediction were adopted in ITM+. However, the performance is still intended to be further improved. These experiments are conducted to further explore techniques to improve the performance of various modules in ITM+. The modules which can be improved are listed as follows:
* Encoder optimization
* B frame coding
* Large blocks with recursive quadtree structure
* Bi-directional prediction