Digital Broadcast Receiver PAD Storage and Reproduction
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Solution Overview
Problem
In digital broadcasting, users face difficulties in replaying missed digital broadcast content due to its real-time nature, making it hard to listen or view stored content with the same quality as real-time reception.
Innovation Solution
A digital broadcast receiver and processing method that stores audio broadcasts along with Program Associated Data (PAD), allowing for the reproduction of stored content with synchronized PAD, using a control unit to manage storage and reproduction through a mapping table and decoders for various services like SLS and DLS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If digital broadcast content is stored for later playback, then users can access missed content, but the quality and synchronization of reproduced content deteriorates compared to real-time reception
Solution Approach 1:
The system performs preliminary actions by storing not only the audio broadcast content but also the Program Associated Data (PAD) and creating a mapping table during the broadcast transmission. This pre-storation of synchronization data and structural information enables the receiver to reconstruct and reproduce the content with original quality and synchronization when playback occurs, eliminating the degradation that would normally occur with simple recording.
Solution Approach 2:
The mapping table serves as an intermediary data structure that links the stored audio broadcast content with its corresponding PAD information. This mapping table acts as a reference guide during reproduction, ensuring that audio and visual elements are synchronized correctly and that the content is reconstructed with the same quality as real-time reception, thus mediating between the stored data and the final reproduced output.
2Quantity of substance
If only audio broadcast is stored, then storage space is reduced, but service quality and synchronization capability are insufficient
Solution Approach 1:
The stored PAD data serves multiple functions: it provides synchronization information for coordinating audio and visual elements, contains metadata for content identification and management, and enables various service types (such as SLS and DLS services) to be reproduced from the same stored audio broadcast content. This multi-functionality of the PAD data allows the system to maintain high service quality without proportionally increasing storage requirements.
3Reliability
If complete broadcast data is stored with full synchronization information, then reproduction quality is maintained, but device complexity increases
Solution Approach 1:
The broadcast data is segmented into distinct components: audio broadcast content and Program Associated Data (PAD). The PAD itself is further segmented into different types (such as SLS and DLS services). This segmentation allows the system to store and process only the essential synchronization and metadata information needed for quality reproduction, rather than storing redundant data, thus managing device complexity while maintaining reproduction quality.
Data Source
AI summary
A digital broadcast receiver and data broadcast content processing method are disclosed. The method uses Program Associated Data (PAD) and includes receiving PAD-based broadcast contents; selecting one of the PAD-based broadcast contents to be stored; storing the selected PAD-based broadcast content in a state existing at the time of selection; selecting a stored PAD-based broadcast content for reproduction; and reproducing the PAD-based broadcast content selected for reproduction. As a result, reproduction of a stored audio broadcast can be delivered with the same level of service as real-time audio broadcast reception.