Broadcast Signal Multiplexing for Additional Service Access
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Solution Overview
Problem
Current digital television broadcast systems lack an efficient method for transmitting and receiving additional services related to current broadcasting programs, limiting user access to supplementary content such as trailers, music videos, and other related digital content.
Innovation Solution
A method and apparatus for transmitting and receiving broadcast signals that involve generating and multiplexing program table information with additional service data, allowing for the separation of primary and additional service streams, enabling easy access to supplementary content through distinct channels or bi-directional communication networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additional service data is multiplexed with program table information in a single stream, then transmission efficiency is improved, but the complexity of separating and accessing additional services increases
Solution Approach 1:
The patent divides the broadcast signal into separate streams: a first stream containing program table information and a second stream containing additional service data. This segmentation allows each stream to be optimized independently and simplifies the receiving end's processing by avoiding complex multiplexing/demultiplexing operations.
Solution Approach 2:
The patent introduces a program guide as an intermediary component that stores and manages information about additional services. The program guide receives program table information from the first stream and additional service data from the second stream, then presents this information to users through a user interface, simplifying the interaction complexity.
2Ease of operation
If additional service identifier information is included in program table information, then user access to additional services is improved, but the size of program table information increases
Solution Approach 1:
The patent segments the information into two separate streams: program table information (first stream) and additional service data (second stream). The additional service identifier information is included in the program table information, but the complete additional service data is stored separately, allowing efficient access without excessive data transmission.
Solution Approach 2:
The patent performs preliminary action by storing additional service data in a database or storage system before it is requested. When a user selects an additional service, the system retrieves the pre-stored data quickly, reducing the need for large real-time data transmissions and minimizing the immediate impact on program table information size.
3Ease of operation
If separate channels are used for primary and additional services, then service accessibility is improved, but channel bandwidth consumption increases
Solution Approach 1:
The patent segments the broadcast signal into a first stream for program table information and a second stream for additional service data. This segmentation enables separate transmission channels while maintaining efficient bandwidth utilization through targeted data transmission rather than broadcasting all data across all channels.
Solution Approach 2:
The patent applies partial action by transmitting only the necessary additional service data when requested, rather than continuously broadcasting all possible additional services. The system transmits additional service data on-demand based on user selection, reducing overall bandwidth consumption while maintaining accessibility.
Data Source
AI summary
Disclosed are a method of transmitting and receiving a broadcast signal and an apparatus for receiving the broadcast signal. In the present invention, first program table information describing a broadcasting stream, and second program table information including additional service identifier information of the multiplexed stream and third program table information describing the additional service data for the multiplexed stream are obtained. The additional service can be provided with the additional service data by using the third program table information.