Video Resolution - 3 times 4K(3840x1920) vertical resolution = 11520x6480 - 90 fps Framerate - 90fps framerate offers a latency low enough to prevent nausea - Delivery and rendering processes shall not introduce additional Stitching Errors stitching errors - Support of scene-based and/or environmental audio 3D Audio - 360 surround sound, object-based audio, Ambisonics Motion-to-photon latency - How much time there is between the user interacts and an image / & audio motion-to-audio latency - Maximum 20 ms - Objects in the foreground shall be far enough to prevent nausea - If objects are too close it is likely they can become an important cause of Foreground & Parallax nausea - Interactive parallax with background shall be present for such objects Thus, we measured the bandwidth requirement to meet the quality requirements. Experiments were conducted with the common test condition (CTC) defined in JVET. The picture coding structure RA (Random Access) and LDB (Low-delay B), and QP (Quantization parameter) 22, 27, 32, and 37 were used. Test sequence were prepared by cropping and merging test sequences (Gaslamp, Harbor, KiteFlite, Trolley) because there are no JVET’s 8K (5760x3240) 12K test sequences defined in JVET yet. For the pilot tests, the video standard reference software HM (ver. 16.6) encoded first 10 frames of the sequence because of its complexity (3 hours per 1 test set, total 8 sets.) Experimental results in Table 3 shows maximum 360 Mbps are needed for 12K 90fps VR service. Table 3. Measured Bandwidth Requirement for 12K VR under the CTC of JVET Quantization 12K Bitrate Coding Structure Parameter (@90fps) 37 60 Mbps 32 107 Mbps RA 27 191 Mbps 22 353 Mbps 37 58 Mbps LDB 32 106 Mbps
Video Resolution - 3 times 4K(3840x1920) vertical resolution = 11520x6480 Framerate - 90 fps - 90fps framerate offers a latency low enough to prevent nausea Stitching Errors - Delivery and rendering processes shall not introduce additional stitching errors 3D Audio - Support of scene-based and/or environmental audio - 360 surround sound, object-based audio, Ambisonics Motion-to-photon latency & motion-to-audio latency - How much time there is between the user interacts and an image / audio - Maximum 20 ms Foreground & Parallax - Objects in the foreground shall be far enough to prevent nausea - If objects are too close it is likely they can become an important cause of nausea - Interactive parallax with background shall be present for such objects Thus, we measured the bandwidth requirement to meet the quality requirements. Experiments were conducted with the common test condition (CTC) defined in JVET. The picture coding structure RA (Random Access) and LDB (Low-delay B), and QP (Quantization parameter) 22, 27, 32, and 37 were used. Test sequence were prepared by cropping and merging JVET’s 8K (5760x3240) test sequences (Gaslamp, Harbor, KiteFlite, Trolley) because there are no 12K test sequences defined in JVET yet. For the pilot tests, the video standard reference software HM (ver. 16.6) encoded first 10 frames of the sequence because of its complexity (3 hours per 1 test set, total 8 sets.) Experimental results in Table 3 shows maximum 360 Mbps are needed for 12K 90fps VR service. Table 3. Measured Bandwidth Requirement for 12K VR under the CTC of JVET Coding Structure Quantization Parameter 12K Bitrate (@90fps) RA 37 60 Mbps 32 107 Mbps 27 191 Mbps 22 353 Mbps LDB 37 58 Mbps 32 106 Mbps
3-17-0057-00-0002-bandwidth-and-latency-requirements-for-virtual-reality.docx