| dflynn@rim.com | |
| Karl Sharman | karl.sharman@eu.sony.com |
This report summarizes the activities of Ad Hoc Group 7 on support for range extensions between the 12th and 13th JCT-VC meetings.
The ad hoc group was mandated to:
Multiple versions of the HM Rext software were produced and announced on the JCT-VC email reflector. The following sections give a brief summary of the changes made for each version. A detailed history of all changes made to the software can be viewed at http://hevc.hhi.fraunhofer.de/trac/timeline.
Released versions of the software are available on the SVN server at the following URL:
https://hevc.hhi.fraunhofer.de/svn/svn_HEVCSoftware/tags/version_number,
where version_number corresponds to one of the versions described below (eg., HM-10.0_RExt-2.0). Intermediate development work is conducted on the HM-range-extensions branch, available at:
The following commit numbers have been used to label particular releases:
| Version | Revision |
| HM9.1_RExt1.0 | 3357 |
| HM9.2_RExt1.0 | 3358 |
| HM10.0_RExt1.0 | 3359 |
| HM10.0_RExt2.0 | 3369 |
Subsequent versions of RExt-1.0 incrementally based against HM-9.1, HM-9.2 and HM-10.01 were released on the 11th of February 2013. These do not include any of the changes relating to RExt-2.0, but are intended to make the deltas more readable.
We would like to thank those volunteers that performed verification testing of these intermediate versions.
Version 2.0 was released on the 19th February 2013. It includes all the changes adopted at the 12th JCT-VC meeting relating to the range extensions.
Tables 1 and 2 show the performance of this version against HM-9.0.1+RExt-1.0 and JM-18.4 respectively according to the common conditions [1].
Main-tier | High-tier | Super-High-tier | |||||||
| Y | Cb | Cr | Y | Cb | Cr | Y | Cb | Cr | |
| All Intra | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| Random Access | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | |||
| Low Delay B | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | |||
Main-tier | High-tier | Super-High-tier | |||||||
| Y | Cb | Cr | Y | Cb | Cr | Y | Cb | Cr | |
| All Intra | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| Random Access | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | |||
| Low Delay B | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | |||
Main-tier | High-tier | Super-High-tier | |||||||
| Y | Cb | Cr | Y | Cb | Cr | Y | Cb | Cr | |
| All Intra | 0.2% | 2.9% | 4.2% | 0.1% | 1.4% | 1.6% | 0.1% | 0.8% | 0.5% |
| Random Access | 0.3% | 3.4% | 4.5% | 0.3% | 1.4% | 2.2% | |||
| Low Delay B | 0.2% | 3.0% | 3.9% | 0.3% | 1.4% | 1.7% | |||
Main-tier | High-tier | Super-High-tier | |||||||
| Y | Cb | Cr | Y | Cb | Cr | Y | Cb | Cr | |
| All Intra | -17.4% | -10.6% | -11.9% | -12.9% | -10.0% | -10.4% | -10.2% | -8.2% | -8.2% |
| Random Access | -24.8% | -25.8% | -20.6% | -15.7% | -24.4% | -15.9% | |||
| Low Delay B | -25.6% | -28.1% | -24.5% | -17.1% | -26.6% | -19.6% | |||
Main-tier | High-tier | Super-High-tier | |||||||
| Y | Cb | Cr | Y | Cb | Cr | Y | Cb | Cr | |
| All Intra | -21.3% | -13.2% | -15.0% | -17.5% | -14.4% | -15.5% | -13.1% | -13.6% | -14.0% |
| Random Access | -35.1% | -32.1% | -27.2% | -29.3% | -31.9% | -25.3% | |||
| Low Delay B | -39.7% | -45.5% | -48.4% | -32.7% | -39.7% | -41.2% | |||
Main-tier | High-tier | Super-High-tier | |||||||
| Y | Cb | Cr | Y | Cb | Cr | Y | Cb | Cr | |
| All Intra | -19.2% | -9.9% | -9.2% | -15.5% | -10.4% | -12.1% | -11.4% | -8.4% | -9.8% |
| Random Access | -29.4% | -14.5% | -9.9% | -27.5% | -19.0% | -13.7% | |||
| Low Delay B | -34.3% | -19.1% | -15.8% | -30.8% | -22.0% | -18.9% | |||