Wireless Audio Video Synchronization via Timestamp Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing video recording devices with built-in audio capabilities suffer from low audio quality due to small microphone units and susceptibility to noise, while using separate audio devices for synchronized recording faces challenges in data synchronization, especially with mobile devices where wireless connections can result in timing delays.
Innovation Solution
A method for synchronizing video and audio recordings by determining and adjusting for delays between video and audio data streams from separate devices, allowing for precise alignment and removal of unsynchronized data sections, enabling high-quality synchronized recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate audio recording device is used to improve audio quality, then audio recording quality is improved, but synchronization difficulty increases
Solution Approach 1:
The system uses time stamp feedback from both video and audio data packets to calculate actual transmission delays. The video recording device receives audio data with time stamps, compares them against video time stamps, determines the delay, and uses this feedback to adjust synchronization by delaying video playback or advancing audio playback accordingly.
Solution Approach 2:
The system performs preliminary delay measurement during the recording phase by continuously comparing time stamps from video and audio streams. This preliminary action establishes the baseline delay that is then applied during playback to ensure synchronization without requiring real-time adjustment.
2Ease of operation
If wireless connection is used between video and audio devices, then ease of operation is improved, but timing synchronization deteriorates
Solution Approach 1:
The system performs preliminary delay measurement during the recording phase by continuously comparing time stamps from video and audio streams. This preliminary action establishes the baseline delay that is then applied during playback to ensure synchronization without requiring real-time adjustment.
Solution Approach 2:
The system uses time stamp feedback from both video and audio data packets to calculate actual transmission delays. The video recording device receives audio data with time stamps, compares them against video time stamps, determines the delay, and uses this feedback to adjust synchronization by delaying video playback or advancing audio playback accordingly.
3Adaptability or versatility
If mobile video recording device is used, then adaptability is improved, but synchronization stability worsens
Solution Approach 1:
The system uses time stamp feedback from both video and audio data packets to calculate actual transmission delays. The video recording device receives audio data with time stamps, compares them against video time stamps, determines the delay, and uses this feedback to adjust synchronization by delaying video playback or advancing audio playback accordingly.
Data Source
AI summary
A method of synchronizing video and audio when recording with a video recording device and an audio recording device configured for wireless data communication with each other including activating a recording at the video recording device, sending an audio recording command from the video recording device to the audio recording device, storing a recorded video data stream in a memory of the video recording device, receiving an audio data stream from the audio recording device at the video recording device and storing in the memory of the video recording device, determining a delay of the stored audio data stream relative to the stored video data stream, and joining the stored audio data stream and the stored video data stream together, taking the determined delay into consideration, in order to provide a recording data stream with synchronized video and audio.