Audio Video Playback Device SLS Metadata Comparison
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Solution Overview
Problem
Conventional audio/video playback devices face issues with mismatched media description information in digital broadcast signals conforming to the ATSC 3.0 standard, leading to user errors in selecting video, audio, or subtitle signals, resulting in a poor user experience.
Innovation Solution
An audio/video playback device with a communication interface and processor that extracts Service Layer Signaling (SLS) from digital broadcast signals, compares metadata fields to create lists of corresponding video, audio, and subtitle identifiers, and displays a candidate menu for user selection, ensuring only playable options are presented.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional audio/video playback devices display all video, audio, and subtitle identifiers from media description, then the user has more options to choose from, but the user may mistakenly select signals that are not actually included in the broadcast, resulting in poor user experience
Solution Approach 1:
The system performs preliminary comparison between S-TSID metadata and MPD metadata before displaying options to the user. By pre-validating which video, audio, and subtitle identifiers actually exist in the broadcast signal, the system prepares an accurate candidate menu in advance, preventing user selection errors before they occur.
Solution Approach 2:
The system establishes a feedback mechanism by comparing metadata from different fields (S-TSID and MPD) to verify signal availability. This cross-validation feedback ensures that only identifiers confirmed to exist in the actual broadcast are presented as selectable options, improving selection accuracy.
2Reliability
If the system compares metadata from multiple fields (S-TSID and MPD) to ensure accuracy, then the reliability of signal information is improved, but the device complexity increases
Solution Approach 1:
The system segments the metadata comparison process into distinct fields (S-TSID metadata in the first field, MPD metadata in the second field) and processes them separately before comparing results. This segmentation allows for systematic validation of video, audio, and subtitle identifiers without overwhelming complexity.
Solution Approach 2:
The processor acts as an intermediary that mediates between the S-TSID metadata and MPD metadata, comparing them to identify matching identifiers. This intermediary processing layer reconciles potential discrepancies between different metadata sources, ensuring accuracy without requiring complex integration of the entire broadcast system.
3Ease of operation
If the system filters and validates signal identifiers before display, then the user experience is improved by preventing unplayable selections, but the processing time and loss of time increases
Solution Approach 1:
The system performs signal validation and filtering in advance, before the user needs to make selections. By pre-processing the metadata comparison and identifying valid identifiers upfront, the system minimizes processing delays during actual user interaction, improving overall ease of operation.
Data Source
AI summary
An audio/video playback device is provided, which includes a communication interface and a processor. The communication interface is configured to receive a digital broadcast signal. The processor is configured to obtain SLS (Service Layer Signaling) from a broadcast stream of the digital broadcast signal, wherein the SLS includes a first field and a second field. The processor compares first metadata in the first field and second metadata in the second field, and includes one or more identifiers which correspond to each other in the first metadata and the second metadata into a first list. The processor displays a candidate menu on the audio/video playback device according to the first list.