Watermark-Based Enhanced Service Data Retrieval
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Solution Overview
Problem
In digital broadcasting systems, the enhanced service data provided by broadcasting stations is often altered or lost during transmission, leading to inconsistencies between the data received by broadcast receiving devices and AV presentation devices, resulting in incomplete or incorrect information being delivered to users.
Innovation Solution
A method and system for processing data streams that includes receiving a data stream with a watermark message, extracting a recovery file location, and selectively extracting a content identifier from the recovery file, which is used to maintain synchronization and retrieve additional metadata, ensuring accurate delivery of enhanced service information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the broadcast receiving device extracts AV content from the MVPD signal and provides only uncompressed AV data to the AV presentation device, then the AV content quality is improved, but the enhanced service data provided by the broadcasting station is lost or altered
Solution Approach 1:
The system segments the data stream processing into two paths: the AV content extraction path through the MVPD for quality delivery, and the watermark-based enhanced service data retrieval path that bypasses the MVPD conversion process. The watermark detector extracts identification information from the watermarked AV content, which is then used to retrieve the original enhanced service data from an enhanced service information providing server, separating the quality delivery function from the data preservation function.
Solution Approach 2:
The watermark acts as an intermediary carrier that transports the enhanced service data identification information through the MVPD conversion process without being affected by it. The watermark detector serves as another intermediary that extracts this identification information from the AV content, enabling the system to retrieve the original enhanced service data from the server without relying on the MVPD's data transmission.
2Loss of information
If multiple server requests are made to retrieve enhanced service data, then the data retrieval completeness is improved, but the latency and processing time increase
Solution Approach 1:
The enhanced service data is preliminarily associated with the AV content through watermarking during the broadcasting station's data preparation phase. This preliminary action embeds the data identification information directly into the AV content stream, so that when the AV content is delivered through the MVPD, the identification information travels with it without requiring separate retrieval requests.
Solution Approach 2:
The system establishes a feedback loop where the watermark detector continuously monitors the AV content for watermark signals, extracts identification information, and uses this information to retrieve enhanced service data from the server. This feedback mechanism ensures that the correct enhanced service data is retrieved automatically based on the actual AV content being displayed, reducing the need for multiple trial requests.
Data Source
AI summary
A method of processing a data stream comprising: (a) receiving said data stream including a watermark message encoded within said data stream; (b) extracting a corresponding recovery file location from said watermark message; (c) receiving a recovery file based upon said recovery file location that includes a corresponding content identifier; (d) selectively extracting said content identifier from said recovery file when said content identifier is an object that includes properties of a pattern expression to express a constraint as a string, where said string is entertainment identifier register information.