Immersive media experience with MPEG OMAF multi-viewpoints and overlays
Immersive media experience with MPEG OMAF multi-viewpoints and overlays
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MPEG OMAF 多视点和叠加带来的沉浸式媒体体验
DOI：
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发表时间：
2020
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通讯作者：
Mikael Lepistö
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文献类型：
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作者：
Kashyap Kammachi Sreedhar;I. Curcio;Ari Hourunranta;Mikael Lepistö
由运动图像专家组（MPEG）开发的全向媒体格式（OMAF）标准的第二版定义了两个主要特征：覆盖和多视点。覆盖通过提供关于全向背景视频内容的附加信息来帮助增强沉浸式体验。多视点特征使得能够从多个空间位置捕获/体验内容。这两个强大的功能沿着交互性，为内容提供商提供了使用沉浸式媒体讲故事的新可能性（例如，非线性）。在这个演示中，我们展示了多视点和覆盖与自适应比特率的依赖于视口的流框架。该框架使用用于多视点的瓦片，其沿着与覆盖一起使用HEVC Main 10简档以多个质量被编码。多视点和覆盖视频的编码瓦片被封装在ISO基本媒体文件格式（ISOBMFF）中，并被分段为HTTP上的动态自适应流传输（MPEG-DASH）段。DASH片段然后由OMAF播放器基于用户的观看条件来获取并呈现在用户设备上。此外，该框架允许用户交互，例如在视点之间切换以及启用/禁用覆盖。
The second edition of the Omnidirectional MediA Format (OMAF) standard developed by the Moving Picture Experts Group (MPEG) defines two major features: overlays and multi-viewpoints. Overlays help in enhancing the immersive experience by providing additional information about the omnidirectional background video content. The multi-viewpoint feature enables the content to be captured/experienced from multiple spatial locations. These two powerful features along with interactivity, dispense the content provider with new possibilities of storytelling (for example, non-linear) using immersive media. In this demo, we show multi-viewpoints and overlays with an adaptive bit rate viewport-dependent streaming framework. The framework uses tiles for multi-viewpoints which, along with overlays, are encoded at multiple qualities using the HEVC Main 10 profile. The encoded tiles of multi-viewpoints and overlay videos are encapsulated in ISO Base Media File Format (ISOBMFF) and fragmented as Dynamic Adaptive Streaming over HTTP (MPEG-DASH) segments. The DASH segments are then fetched by the OMAF player based on the user's viewing conditions and rendered on the user device. Additionally, the framework allows for user interaction, such as switching between viewpoints and enabling/disabling of the overlays.