JVET-E0008

JVET-E0008 JVET AHG report: 360° video coding tools and test conditions (AHG8) [J. Boyce (chair), A. Abbas, E. Alshina, G. Van der Auwera, Y. Ye (vice chairs)]
总结AHG8在360视频编码工具和测试条件方面的工作。

本次会议中有20篇360视频方面的文章，分类如下：

1. Testing procedures and metrics
   JVET-E0021 AHG8: On 360 video testing procedure V. Zakharchenko, C. Kim, E. Alshina (Samsung)
   指出质量评估应考虑投影变换引入的失真，提出了质量评估的修改方案。
   JVET-E0024 AHG8: Dynamic viewport generation for 360° video evaluation T. Ikai, Y. Yasugi, T. Aono (Sharp)
   JVET-E0070 AHG8: TSP Evaluation With Viewport-Aware Quality Metric For 360 Video G. Van der Auwera, M. Coban, Hendry, M. Karczewicz (Qualcomm)
   对TSP格式的360视频进行评估：相对于ERP窗口尺寸增大到约170°，且BDBR更节省；相对于两种downsampled cube map projections (DCP)有6%和12%的编码增益。
   JVET-E0071 AhG8: Viewport-based subjective evaluation of 360-degree video coding P. Hanhart, Y. He, Y. Ye (InterDigital)
   JVET-E0083 AHG8: On 360 Video Quality Evaluation Hendry, M. Coban, G. Van der Auwera, M. Karczewicz (Qualcomm)
   提议360视频压缩应使用端到端质量评估，同时还需要主观测试来确认其性能，其中WS-PSNR可以来简化简单投影的评估。
   JVET-E0107 AHG8: Requirements and proposed method for viewport-adaptive quality assessment A. Aminlou, A. Zare, M. M. Hannuksela (Nokia)
   提出了nested zonal SPSNR (NZ-SPSNR)分为Front zone（high quality）、Side zone、Back zone，基于头部的速度/角度，可以确定显示的zone。

2. Conversion Software
   JVET-E0084 AHG8: Algorithm description of projection format conversion in 360Lib Y. He, X. Xiu, Y. Ye (InterDigital), V. Zakharchenko, A. Singh, A. Dsouza (Samsung), C.-C. Huang, J.-L. Lin (MediaTek), Y. Sun, A. Lu, L. Yu (Zhejiang Univ.), G. Van der Auwera (Qualcomm), C. Zhang, Y. Lu (OwlReality)

3. Projection Formats
   JVET-E0025 AHG8: Segmented Sphere Projection for 360-degree video C. Zhang, Y. Lu, J. Li, Z. Wen (Owl Reality)
   JVET-E0029 AHG8: Efficient Frame Packing for Icosahedral Projection S. N. Akula, A. Singh, A. Dsouza, R.K. K, C. Pujara, R.N. Gadde, V. Zakharchenko, E. Alshina, K.P.Choi, (Samsung)
   JVET-E0056 AHG8: An improvement on the compact OHP layout H.-C. Lin, C.-C. Huang, C.-Y. Li, Y.-H. Lee, J.-L. Lin, S.-K. Chang (MediaTek)
   JVET-E0058 AHG8: A viewport-based pyramid projection for VR360 video streaming P. Wang, H.-C. Lin, C.-Y. Li, Y.-H. Lee, J.-L. Lin, S.-K. Chang (MediaTek)
   JVET-E0085 AHG8: Crosscheck of JVET-E0025 Segmented Sphere Projection for 360-degree video Y. He, X. Xiu, P. Hanhart, Y. Ye (InterDigital)
   JVET-E0090 AHG8: Nested polygonal chain packing of 360-degree ERP pictures K. Kammachi-Sreedhar, M. M. Hannuksela (Nokia)
   JVET-E0113 AHG8: Supplemental Test Results on Segmental Sphere Projection (SSP) M. Zhou (Broadcom)

4. Coding tools
   JVET-E0026 AHG8: Results for Geometry correction for motion compensation of planar-projected 360VR video with JEM4.1 and 360Lib J. Sauer, M. Wien (RWTH)
   JVET-E0057 AHG8: Face-based padding for cube projection C.-H. Shih, H.-C. Lin, J.-L. Lin, S.-K. Chang (MediaTek)
   JVET-E0065 AHG8: Unrestricted Motion Compensation for 360 Video in ERP Format M. Zhou (Broadcom)

5. Rotation
   JVET-E0050 AhG8: Coding performance impact of omnidirectional projection rotation V. Zakharchenko, E. Alshina, K.P. Choi, C. Pujara, A. Dsouza
   JVET-E0061 AHG8: Yaw-roll-pitch orientation for VR360 video content H.-C. Lin, C.-H. Shih, J.-L. Lin, S.-K. Chang (MediaTek)
   JVET-E0075 AHG8: Spherical rotation orientation SEI for coding of 360 video J. Boyce, Q. Xu (Intel)