Of itu-t sg16 wp3 and iso/iec jtc1/SC29/WG11

JCTVC-M0363 AHG14: Cross-check of Color Gamut Scalable Video Coding using 3D LUT (JCTVC-M0197) [E. François (Canon)] [late]
JCTVC-M0214 AHG9/ AHG14: On Color Gamut Scalable Video Coding [S. Deshpande, L. Kerofsky, A. Segall (Sharp)]

Discussed in BoG; see BoG report M0450.

The upcoming deployment of UHDTV devices and content will use a different color gamut than legacy devices. Specifically, HD uses the ITU-R BT.709 recommendation, while UHDTV will use the ITU-R BT.2020 recommendation. A key difference between these systems is that the color gamut of UHDTV is significantly larger than HD. It is asserted that this will provide a more “life like” viewing experience, which is consistent with other UHDTV characteristics, such as high resolution. A motivation for the proposed support for color gamut scalability is this difference between color gamuts of base and enhancement layers when complying with the ITU-R standards.

This document proposes:

1. A new bit depth scaling process for reference pictures to support color gamut scalable coding.

2. It additionally proposes signaling color gamut and bit depth information regarding each layer in VPS extension to support session negotiation allowing end devices to select layers to decode based on their bit depth and color support capability.

One part of the contribution is related to HL syntax – see BoG report M0450.

Further proceeding on color gamut:

• 
  Collect test sequences
  
• 
  Continue study in AHG, prepare experimental environment, define test cases etc. when test sequences are available
  

For bit-depth scalability stand-alone:

• 
  The contribution has a combination of bit-depth extension currently developed in RExt work and scalable extension currently developed as SHVC,
  
• 
  Benefit of low-to-high bit depth scalable coding without combination to color mapping to be shown (Note: L0229 was an information document that included some results).