Cloud UI Engine Caching for Set-Top Box Rendering
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Solution Overview
Problem
Existing cloud UI rendering systems face challenges in delivering high-quality user experiences at a low cost, particularly when serving millions of users, as they inefficiently generate repetitive user interfaces, leading to impractical scaling issues and inefficient use of cloud resources.
Innovation Solution
A virtual set top system with a pool of UI engines in the cloud that shares a cache to store rendered TV UIs, allowing for segmentation and caching of UI elements and interactions, enabling reuse and efficient rendering of UI objects, including images and video segments, to improve user experience and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one renderer is configured in the cloud for each user to generate video of the user interface and media content, then user experience quality is maintained, but system cost and complexity increase significantly and cannot scale to millions of users
Solution Approach 1:
Multiple UI renderers are merged into a single shared renderer in the cloud. This renderer services multiple users by generating UI video frames that are then composited with user-specific media content on the client device, reducing the number of cloud renderers from millions to a manageable pool while maintaining UI quality consistency across all users.
Solution Approach 2:
Instead of having each user receive a unique rendered UI video stream from a dedicated renderer, the system creates copies of the same UI video frames and distributes them to multiple users. The UI rendering is copied once in the cloud and then combined with user-specific content locally, eliminating the need for multiple independent rendering instances.
2Adaptability or versatility
If UI rendering is performed separately for each user in the cloud, then user-specific customization is achieved, but resource utilization efficiency deteriorates due to repetitive generation of common UI elements
Solution Approach 1:
The UI rendering process is segmented into common UI elements and user-specific elements. Common UI elements (menus, buttons, navigation) are rendered once in the cloud and reused across multiple users, while user-specific elements (media content, personal recommendations) are handled separately on the client device, reducing redundant rendering of identical UI components.
Solution Approach 2:
A single cloud-based UI renderer is designed to serve multiple users simultaneously by generating universal UI video frames that can be applied across different user contexts. This multi-functional renderer handles various UI states and user interactions through software logic rather than requiring separate hardware rendering instances for each user.
3Productivity
If a single shared renderer is used in the cloud to service multiple users, then resource efficiency and scalability improve, but the complexity of compositing UI with user-specific content increases
Solution Approach 1:
Instead of compositing UI elements onto static media content in the cloud, the system inverts the approach by rendering the UI as video frames first, then compositing user-specific media content on top of these UI frames at the client device. This reversal moves the compositing complexity from the cloud infrastructure to the client device, which is better suited for handling individual user content variations.
Data Source
AI summary
Techniques for cloud user interface (UI) rendering in a virtual set top system is performed by a UI engine on a server or a cloud platform. The method includes receiving a request for a UI, where the request includes a state associated with the UI and the request. The method further includes identifying, based at least in part on the first state, UI element(s) and/or interactions associated with the UI. The method also includes determining whether or not UI object(s) corresponding to the UI element(s) and/or the interactions exist in a cache. The method additionally includes generating the UI using the UI object(s) upon finding the UI object(s) in the cache. The method further includes rendering the UI upon not finding the UI object(s) in the cache, including rendering the UI element(s) and/or the interaction(s) as the UI object(s) and storing the UI object(s) in the cache.