Audiovisual Delay Calibration for Real-Time Signal Synchronization
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Solution Overview
Problem
Conventional audiovisual systems struggle with synchronization issues due to separate processing of audio and video signals, leading to desynchronization, and existing methods are inefficient in adjusting and customizing synchronization parameters.
Innovation Solution
A distributed reporting mechanism in the audiovisual system collects delay information from main circuit modules to calculate a calibration value for automatic delay compensation, allowing for real-time synchronization and customization of audiovisual content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centralized lookup table is used for delay compensation, then synchronization can be achieved, but the system becomes difficult to customize and adjust for different video formats
Solution Approach 1:
The patent divides the centralized lookup table into multiple distributed lookup tables, each maintained by individual circuit modules (audio processing circuit, video processing circuit, etc.). This segmentation allows each module to independently manage its own delay characteristics, enabling customization for different video formats while maintaining synchronization accuracy through coordinated use of all distributed tables.
2Measurement precision
If manual adjustment of synchronization parameters is performed, then precise synchronization can be achieved, but the process requires significant time and effort
Solution Approach 1:
The patent implements a self-service mechanism where circuit modules automatically report their delay information to the synchronization processing circuit, which then automatically queries the distributed lookup tables and calculates compensation values. This eliminates manual adjustment entirely, achieving both high precision synchronization and time efficiency through automated delay measurement and compensation.
Solution Approach 2:
The patent establishes a feedback loop where circuit modules continuously report their actual delay characteristics, the synchronization processing circuit queries the lookup tables based on this feedback, calculates appropriate compensation values, and applies them in real-time. This closed-loop feedback system ensures precise synchronization while eliminating manual intervention.
3Adaptability or versatility
If separate processing circuits are used for audio and video signals, then different decoding technologies can be applied, but synchronization becomes difficult to maintain
Solution Approach 1:
The patent merges the delay management functionality into a unified distributed lookup table system that is shared across all separate audio and video processing circuits. Each circuit maintains its own processing independence for different decoding technologies, while the distributed lookup tables provide a coordinated framework for synchronization, combining the benefits of separate processing with unified synchronization control.
Data Source
AI summary
A method and a system for audiovisual signal synchronization are provided. The method is adapted to an audiovisual system. When the audiovisual system is in operation, a circuit for distributed audiovisual synchronization-calibration is provided for acquiring delay information reported by various audiovisual circuit modules that are in charge of processing audiovisual signals. Accordingly, the audiovisual synchronization processing system that is disposed in the audiovisual system to synchronize the audiovisual signals can obtain a time difference between audio signals and video signals. When processing audio and video data, the audiovisual system can utilize the time difference to synchronize the audio signals and the video signals, and then output an audiovisual content.