International organisation for standardisation organisation internationale de normalisation

5.1.43D-AVC-CE4: Depth intra prediction without inter-component prediction

m23682	Jaejoon Lee	3D-AVC-CE4 summary report on depth intra prediction
m23630	Yin Zhao, Lu Yu	3D-AVC-CE4 results on Gradient-based Most Probable Mode (GMPM) for intra depth coding
m23660	Kwan-Jung Oh, Byung Tae Oh, Jaejoon Lee, Du Sik Park	3D-AVC-CE4 results on Samsung plane segmentation based intra prediction and depth intra skip prediction
m23671	Kwan-Jung Oh, Jaejoon Lee, Du Sik Park	Cross check of 3D-AVC-CE4 NTT's palette-based prediction by Samsung
m23672	Seok Lee, Seungsin Lee, Jaejoon Lee, Du Sik Park	Cross check of 3D-AVC-CE4 Zhejiang Univ.'s Gradient-based MPM derivation for Intra 4x4 and 8x8 by Samsung
m23693	Shinya Shimizu, Hideaki Kimata	3D-AVC-CE4 results on Pallete-based prediction with binary shape coding
m23695	Shinya Shimizu	Cross check of 3D-AVC-CE4 on plane segmentation based intra prediction and depth intra block skip (m23660)
m23890	G. Bang, K.Y. Kim, G.H. Park, W.S. Cheong, N.H. Hur	Cross check of 3D-AVC-CE4 results on NTT’s proposal by ETRI KHU
m23903	G. Bang, K.Y. Kim, G.H. Park, W.S. Cheong, N.H. Hur	Cross check of 3D-AVC-CE4 results on Samsung's proposal by ETRI KHU
m23942	G. Bang (ETRI), K.Y. Kim, G.H. Park(KHU), W.S. Cheong, N.H. Hur(ETRI)	3D-AVC-CE4 related: The proposal for intra skip prediction modification

Summary report:

• 
  Zhejiang University proposed gradient values along 5 of 9 directions that were calculated based on neighbouring values.
  
• 
  Samsung proposed a combined plane segmentation based on intra prediction and depth intra skip prediction.
  
• 
  NTT proposed palette-based prediction with binary shape coding.
  
• 
  The CE report recommended adopting the Samsung proposal based on it having the highest gains being reported. It also recommended to continue the CE to improve the results further.
  

m23660 (Samsung) combines two intra prediction tools: plane segmentation based intra prediction and depth intra skip prediction, which estimates prediction direction from neighbouring pixels and uses the high priority MB type (intra skip or B-direct). This reportedly achieves gains of 0.83% for 2-view and 0.95% for 3-view. They also reported the performance of individual tools.

m23630 (Zhejiang) was aiming to improve MPM derivation based on gradient data. Gains of approximately 0.19% and 0.14% were reported with a negligible increase in complexity.

m23942 (Kyunghee Univ.) proposed extension of the Samsung scheme, to include intra skip for P-slices. The additional gain was approximately 0.25% for both the 2-view and 3-view cases. A cross-check remained in progress.

It was noted that there should also be some value in maintaining current AVC intra prediction and that small changes to existing modules should be justified by sufficient coding gain.

Conclusion:

• 
  Continue CE