9.6Discussion and Conclusions
Most of the proposals added complexity with some benefit on compression performance
Complexity in intra prediction can not only be judged by encoder/decoder runtime, but rather must take into account number of pixel operations, pipelining in sequential processing etc. – a number of these issues have been identified and proponents are asked to address them.
The potential mutual benefit resulting from addition of compressions gains is not clear – it would be desirable to test combinations.
In terms of decoder complexity judgement, worst-case scenarios (e.g. extreme frequent usage of more complex modes) must be considered.
Visual evaluation could be necessary.
Continuation of CE was encouraged – major goals of this CE should be to investigate:
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combining different approaches of intra prediction rather than running in parallel
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investigating the complexity
Note: A method for improved intra prediction of chroma was adopted (see JCTVC-D255/JCTVC-D278).
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