Screen Casting of Video With Synchronized Scrolling Comments
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Solution Overview
Problem
Existing screen casting methods using protocols like AirPlay and DLNA do not support the simultaneous transmission of video content and scrolling comments, limiting the interactive experience during streaming media sessions.
Innovation Solution
A screen casting method that enables simultaneous casting of video streams and scrolling comments or subtitles by sending download addresses of both to a target device, allowing superimposed display and user-defined parameters for enhanced interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If streaming mode is used for screen casting, then video content can be transmitted smoothly, but scrolling comments cannot be pushed simultaneously
Solution Approach 1:
The patent segments the screen casting content into two independent parts: video stream data and scrolling comment data. The video is transmitted through traditional streaming protocols while scrolling comments are transmitted separately through a dedicated data channel, allowing both to be pushed simultaneously without interfering with each other
Solution Approach 2:
The patent introduces an intermediary mechanism that receives the video stream from the source device, extracts scrolling comment data, and redistributes both to the target device. This intermediary layer enables the separation and independent transmission of video and comment data streams
2Ease of operation
If scrolling comments are pushed with video stream, then interaction experience is improved, but data transmission complexity increases
Solution Approach 1:
The patent creates a universal screen casting system that can handle both traditional video streaming and enriched interactions with scrolling comments through a unified protocol. The system maintains backward compatibility while adding new functionality, allowing the same infrastructure to support multiple data types
3Loss of information
If entire display interface is mirrored, then complete screen casting is achieved, but streaming mode benefits are lost
Solution Approach 1:
The patent extracts only the essential video content and scrolling comment data from the complete display interface, transmitting them through efficient streaming protocols. Non-essential elements are excluded from transmission, reducing data volume while maintaining the core viewing and interaction experience
Data Source
AI summary
A screen casting method is applied to a source device having a display and a speaker. The screen casting method includes receiving first data and decoding the first data, displaying the decoded first data through the display and/or outputting the decoded first data through the speaker, receiving text information from the server and parsing the text information, and displaying the parsed text information through the display, where the text information is associated with the first data. A first operation of performing screen casting to a target device is detected, and in response to the first operation, sending a download address of the first data and a download address of the text information to the target device.