Video Signal Data Frame Transmission via Correlation Sequences
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Solution Overview
Problem
In video surveillance and transmission, the demand for transmitting video, audio, and control data using a single cable is increasing, but the length of the cable and interference can lead to significant errors in data extraction, complicating system operation.
Innovation Solution
A method involving the generation of a data frame with a frame header and frame data, including autocorrelation and cross-correlation sequences, which is inserted into non-synchronization areas of a video signal, allowing for reliable transmission and extraction of data within the video signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If data is transmitted through a single cable in video surveillance systems, then material cost and construction cost are reduced, but cable length and interference cause significant errors in data extraction
Solution Approach 1:
The patent applies preliminary action by inserting correlation sequences (autocorrelation and cross-correlation) into the video signal before data transmission. These sequences are prepared in advance and embedded in specific regions of the video signal, enabling the receiving end to accurately identify and extract data even after transmission through long cables with interference. The correlation sequences act as pre-configured markers that facilitate accurate data retrieval without requiring complex real-time processing.
2Device complexity
If data frames are inserted into synchronization areas of video signals, then data transmission is simplified, but line and field synchronization is disrupted
Solution Approach 1:
The patent applies local quality by carefully selecting specific regions within the video signal for data frame insertion, namely the blanking line area and the area between color synchronization and line blanking cut-off. These are localized regions that do not affect the critical synchronization areas. By confining data insertion to these specific local zones, the patent maintains the overall synchronization stability of the video signal while still providing sufficient space for data transmission.
3Measurement precision
If correlation sequences are added to data frames, then data extraction accuracy is improved, but frame structure becomes more complex
Solution Approach 1:
The patent applies universality by designing correlation sequences that serve multiple functions simultaneously. The autocorrelation and cross-correlation sequences are embedded within the data frame structure and serve both as synchronization markers and as correlation reference data for accurate extraction. This multi-functional design reduces the need for separate dedicated structures, thereby limiting the increase in frame complexity while maintaining high extraction accuracy.
Data Source
AI summary
The present disclosure relates to systems and methods for transmitting data in a video signal. The systems may perform the methods to generate a data frame, wherein the data frame may include at least a frame header and frame data, the frame header may include at least one autocorrelation and cross-correlation sequence; insert the data frame into an area of a video signal, wherein the inserted area of the video signal is not an area of line and field synchronization or an area of effective video; transmit the video signal having the data frame to another device.