Media Server Closed Caption Format Conversion
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Solution Overview
Problem
Existing systems fail to provide scalable and compatible closed captioning for Internet-accessible multimedia content, as they often support only specific streaming technologies and platforms, limiting accessibility for users with different captioning formats, despite regulatory mandates.
Innovation Solution
A media server-based system that decodes and converts closed captions from various formats, such as CEA-608, into a platform-independent timed text representation, enabling dynamic conversion and transmission to destination devices in compatible formats, without requiring dedicated hardware decoders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-platform closed captioning system is implemented, then the system complexity is reduced, but the adaptability to different closed captioning formats and devices is limited
Solution Approach 1:
The patent implements a universal closed captioning system that can process multiple captioning formats (CEA-608, CEA-708, SCC, etc.) through a single platform. The media server is designed to accept various input formats and convert them to platform-independent timed text representation, enabling the system to serve diverse electronic devices and platforms without requiring separate dedicated systems for each format.
Solution Approach 2:
The patent introduces a platform-independent timed text representation as an intermediary format between different closed captioning formats and various destination devices. This intermediate representation layer enables seamless conversion and transmission across multiple platforms without requiring the system to directly support every possible format combination, thus reducing complexity while maintaining versatility.
2Reliability
If hardware closed caption decoders are used, then the decoding reliability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces hardware-based closed caption decoders with software-based decoding implemented on general-purpose processors within the media server. The software decoder emulates the functionality of hardware decoders, processing closed captioning data through software algorithms that replicate hardware decoder behavior. This substitution eliminates the need for dedicated hardware components while maintaining decoding reliability through software-based error handling and format conversion capabilities.
3Adaptability or versatility
If closed captioning is added to Internet-accessible content, then the accessibility is improved, but the compatibility across different platforms is reduced due to format variations
Solution Approach 1:
The patent changes the parameter of closed captioning representation from device-specific formats to a unified platform-independent timed text format. By transforming the captioning data structure and representation parameters through standardized conversion processes, the system maintains accessibility across all devices while simplifying format compatibility management. The media server automatically handles parameter transformations based on the destination device requirements.
Data Source
AI summary
Systems and methods of processing closed captions for live streams are disclosed. For example, a media server may receive closed captioning data associated with a live video stream, where the closed captioning data is represented in a first format. The media server may convert the closed captioning data from the first format to a platform-independent format and convert the closed captioning data from the platform-independent format to a second format. The media server may transmit the closed captioning data in the second format to a destination device.