Sub GOP Media Segments for Scalable Broadcast Streaming
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Solution Overview
Problem
Current adaptive streaming technologies, such as DASH, are not suited for simultaneous content distribution to a large number of clients, leading to scalability issues and delays in real-time reproduction, especially in broadcast scenarios.
Innovation Solution
A communication device and method that generates and transmits sub GOP media segments with in-GOP location identifiers, allowing for efficient packetization and reconstruction of media data, enabling real-time reproduction across multiple clients without long delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If point-to-point HTTP streaming using CDN is used for content distribution, then content can be delivered to individual clients, but scalability is poor and cost is high for simultaneous broadcast to large numbers of clients
Solution Approach 1:
The patent segments GOP data into smaller sub GOP media segments, each containing only part of the constituent data. This segmentation allows the data to be distributed more efficiently and enables better scalability for simultaneous broadcast to multiple clients while reducing the complexity of managing individual client connections
Solution Approach 2:
The patent combines broadcast distribution with HTTP-based streaming protocols by integrating sub GOP media segments into packet structures that can be transmitted via both broadcast waves and networks. This merging allows a single system to serve both broadcast and network streaming use cases, improving scalability without proportionally increasing complexity
2Loss of time
If traditional DASH adaptive streaming is used, then content can be distributed with different bit rates, but real-time reproduction is delayed and not suitable for broadcast scenarios
Solution Approach 1:
By segmenting GOP data into sub GOP media segments, the patent reduces the data size and transmission time for each segment, enabling faster real-time reproduction while maintaining the adaptability needed for broadcast scenarios. The in-GOP location identifier allows receivers to quickly locate and reconstruct the necessary data without long delays
Solution Approach 2:
The patent includes metadata with each sub GOP media segment that provides advance information about the data location and structure. This preliminary action allows receivers to prepare for reconstruction in advance, reducing real-time processing delays while maintaining broadcast compatibility
Data Source
AI summary
Provided are devices and methods that enable content distribution of data units generated by dividing a GOP, and GOP reconstruction and reproduction on the reception device side. A transmission device generates a sub GOP media segment as packet-stored data, the sub GOP media segment storing media data including only part of constituent data of a Group of Pictures (GOP) as a processing unit of encoded data and metadata corresponding to the media data, and generates and transmits a packet having an in-GOP location identifier recorded as packet additional information therein, the in-GOP location identifier indicating the in-GOP location of the media data stored in the sub GOP media segment. A reception device arranges media data dispersed and stored in packets by referring to the in-GOP location identifiers stored in received packets, and reconstructs and decodes a GOP.