TV Audio-Video Synchronization Adjustment via Automatic Delay Calibration
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Solution Overview
Problem
The increasing diversity of frequency sources for video playback on TVs leads to audio synchronization issues, causing sound and picture to be out of sync, especially with external devices like Bluetooth speakers, resulting in a poor user experience.
Innovation Solution
A method and device that automatically adjust sound and picture synchronization by comparing video clips with a preset database, determining synchronization delays, and synchronizing audio and video accordingly, which includes inserting default videos if necessary and using internal or external microphones to collect audio information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the TV uses a fixed audio synchronization adjustment at factory, then the device complexity is reduced, but the adaptability to different frequency sources deteriorates
Solution Approach 1:
The TV automatically detects audio synchronization issues and adjusts the audio delay without user intervention. The system self-calibrates by comparing audio and video synchronization status and automatically modifies the audio delay parameter to achieve proper synchronization, eliminating the need for manual user adjustment while maintaining adaptability across different frequency sources
Solution Approach 2:
The system continuously monitors audio-video synchronization status and uses this feedback to automatically adjust audio delay settings. When desynchronization is detected, the feedback mechanism triggers automatic calibration routines that modify the audio processing parameters to restore proper synchronization, enabling the TV to adapt to different frequency sources dynamically
2Measurement precision
If the TV manually adjusts audio synchronization, then the measurement precision of synchronization delay is improved, but the ease of operation deteriorates
Solution Approach 1:
The TV performs automatic audio synchronization calibration without requiring user operation. The system independently detects synchronization delays, measures the precise timing offset between audio and video signals, and automatically adjusts the audio delay parameter to achieve proper synchronization, completely eliminating the need for manual user intervention
Solution Approach 2:
The patent replaces manual mechanical adjustment mechanisms with automatic electronic detection and adjustment systems. The system uses electronic signal analysis to measure synchronization delays and electronically adjusts audio processing parameters, substituting the need for manual user operations while maintaining high measurement precision
3Adaptability or versatility
If the TV plays video from external devices, then the adaptability to different frequency sources is improved, but the sound and picture synchronization deteriorates
Solution Approach 1:
The audio delay parameter is made dynamic rather than fixed, allowing the system to automatically adjust the delay value based on the specific frequency source being used. When an external audio device is detected, the system dynamically calibrates the audio delay to compensate for device-specific processing delays, maintaining synchronization stability across different devices
Solution Approach 2:
The system automatically changes the audio delay parameter based on the detected frequency source characteristics. Different external devices trigger different delay parameter values, allowing the TV to adapt to the specific timing characteristics of each device while maintaining reliable audio-video synchronization
Data Source
AI summary
Disclosed is a method for automatically adjusting synchronization of sound and picture of TV. The method includes: obtaining a video, determining whether the video contains an adjustment video clip corresponding to a preset video database; obtaining audio information of the adjustment video clip and a time point corresponding to the audio information if the video contains the adjustment video clip corresponding to the preset video database; comparing the audio information of the adjustment video clip and the time point corresponding to the audio information with a standard video in the preset video database, and determining whether there is a synchronization delay between the sound and the picture; and synchronizing the sound and the picture of the video if there is the synchronization delay between the sound and the picture. A device for automatically adjusting synchronization of sound and picture of TV and a computer readable storage medium are further disclosed.