3D Broadcasting Data Multiplexing via Conditional Access System
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Solution Overview
Problem
Digital broadcasting systems face limitations in providing various high-quality 3D broadcasting services due to limited broadcasting channels, as existing methods struggle to effectively transmit and receive both primary and supplementary data efficiently within these constraints.
Innovation Solution
The system employs a conditional access system (CAS) to multiplex and transmit broadcasting data and supplementary data through a combination of dedicated and common channels, using multiple primary and supplementary source units, multiplexers, encoders, and transmitters to maximize channel usage and provide high-quality 3D services to subscribed users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If broadcasting data and supplementary data are transmitted through the same broadcasting channel, then channel utilization is improved, but service quality and reliability deteriorate due to channel congestion and limited bandwidth
Solution Approach 1:
The patent segments broadcasting data and supplementary data into separate transport streams (TS1 and TS2), which are then multiplexed into a single broadcasting channel. This segmentation allows independent handling and error protection of different data types while maintaining efficient channel utilization through unified transmission.
Solution Approach 2:
The patent introduces a new dimension of data organization by creating multiple virtual channels (transport streams) within a single physical broadcasting channel. Through hierarchical multiplexing (TS level and packet level), the system achieves multidimensional data separation and transmission, resolving the conflict between channel utilization and service quality.
2Adaptability or versatility
If multiple transmitters provide various 3D broadcasting services through limited channels, then service variety is improved, but channel capacity is exceeded and service reliability deteriorates
Solution Approach 1:
The patent creates a universal transmission framework where a single broadcasting channel can carry multiple transport streams supporting different 3D broadcasting services. The multiplexing structure allows the channel to serve multiple functions simultaneously, providing service variety without exceeding channel capacity.
Solution Approach 2:
The patent implements nested multiplexing where transport streams are nested within the broadcasting channel, and data packets are nested within transport streams. This nested structure allows multiple services to be contained within limited channel resources hierarchically, maintaining service reliability through organized resource allocation.
3Reliability
If conditional access system is applied to encrypt and protect broadcasting services, then service security is improved, but system complexity and data processing overhead increase
Solution Approach 1:
The patent applies conditional access encryption preliminarily to the entire transport stream before multiplexing and transmission. This preliminary security measure simplifies the overall system architecture by implementing security at an early stage, avoiding the need for complex per-packet encryption while maintaining service security.
Data Source
AI summary
Provided is an apparatus and method for transmitting and receiving broadcasting data and supplementary data. The method includes: generating broadcasting data and supplementary data for a plurality of predetermined 3D broadcasting services to be provided to users; multiplexing the generated broadcasting data for broadcasting channels respectively allocated to the plurality of predetermined 3D broadcasting services, and multiplexing the generated supplementary data for one commonly broadcasting channel commonly allocated to the plurality of predetermined 3D broadcasting services; encoding the multiplexed supplementary data corresponding to a conditional access system; and transmitting the encoded supplementary data to the one common broadcasting channel, and transmitting the multiplexed broadcasting data to the allocated broadcasting channels.