Hierarchical Video Stream Synchronization via Hash Mediation
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Solution Overview
Problem
Conventional broadcasting and communication systems face challenges in improving video playback quality when using different transmission paths, as they are limited by the need for identical data streams and lack flexibility in modifying parameters for varying receiver specifications.
Innovation Solution
A stream transmitting system that includes a transmission control device and a receiving device, capable of transmitting and receiving hierarchically-encoded video data streams over both broadcast and IP communication networks, using a data packet generating unit to determine the optimal transmission path and timing, and incorporating Hash values for synchronization across different transmission paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data streams are transmitted over both broadcasting and communication paths, then video playback quality can be improved through dynamic adjustment, but synchronization and reconstruction across different transmission paths becomes complex
Solution Approach 1:
The patent introduces a transmission control device as an intermediary that manages data stream distribution across broadcasting and communication paths. This device generates and transmits management information including Hash values, which act as mediators to enable synchronization and reconstruction at the receiving end without requiring complex coordination between multiple transmission paths
Solution Approach 2:
The system performs preliminary actions by generating Hash values and management information before data transmission. The transmission control device calculates Hash values for data streams and includes them in management information transmitted to receiving devices, enabling pre-prepared synchronization mechanisms that simplify real-time reconstruction processes
2Adaptability or versatility
If H.264/SVC is used to generate multiple data streams, then transmission rate can be dynamically changed, but it is difficult to improve playback quality when using different transmission paths
Solution Approach 1:
The patent segments data streams into base streams and extension streams, with each stream type optimized for specific transmission paths. The transmission control device selectively transmits different stream combinations over broadcasting and communication paths based on receiver capabilities and path characteristics, enabling both adaptability and quality optimization
Solution Approach 2:
The system dynamically changes transmission parameters by selecting different combinations of base and extension streams for different transmission paths. The transmission control device adjusts stream selection based on receiver specifications and path conditions, achieving both adaptability and improved playback quality through optimized parameter configuration
3Quantity of substance
If conventional broadcasting is used for wide coverage and simultaneous distribution, then large number of receivers can be served, but parameters cannot be drastically modified for different receiver specifications
Solution Approach 1:
The patent introduces dynamic stream selection capabilities to conventional broadcasting. The transmission control device dynamically determines which base and extension streams to transmit based on receiver specifications received through communication paths, enabling parameter adaptation while maintaining wide coverage through the broadcasting infrastructure
4Adaptability or versatility
If communication paths are used for individualized transmission, then receiver specifications can be considered, but scale and simultaneousness are limited compared to broadcasting
Solution Approach 1:
The patent creates a universal system where a single transmission control device manages multiple transmission paths (broadcasting and communication). This multi-functional approach allows the system to serve large numbers of receivers through broadcasting while simultaneously providing individualized stream selection through communication paths, achieving both scale and adaptability
Data Source
AI summary
A stream transmitting system for transmitting a data stream, which has first layer including base data and second layer including data supplementing the base data, includes a transmitting device and a receiving device. The transmitting device includes: a transmission control unit for packetizing the data of the first layer and the data of the second layer to output a data packet of the first layer and a data packet of the second layer; first transmitting unit for transmitting the data packet of the first layer to the receiving device through first transmission path; and second transmitting unit for transmitting the data packet of the second layer to the receiving device through second transmission path. The receiving device includes: first receiving units for receiving the data packet transmitted through the first transmission paths; and a reception control unit for reconstructing a hierarchically-encoded data stream.