Organisation internationale de normalisation

10CE7: Alternative transforms

10.1Summary

10.1.1.1.1.1.1.1.1JCTVC-D042 CE7: Alternative Transforms - Summary Report [R. Cohen, C. Yeo, R. Joshi]

This document provided a summary and table of documents related to Core Experiment 7 (CE7) on Alternative Transforms. The purpose of Core Experiment 7 (CE7) was to investigate the performance of transforms other than the conventional integer DCT-like transform currently in HM (TMuC 0.9).

The types of proposed transforms and methods generally fall into one or more of the following categories:

1. 
   MDDT Simplification
   

• 
  Separable DCT/KLT
  
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  Separable DCT/DST
  
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  Mode-mapping (Intra prediction direction mapped to transform mode)
  
• 
  Coefficient ordering/scanning
  
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  Use of symmetry to reduce the number of transforms
  

2. 
   ROT Improvements