Audio Video Synchronization for Multi-Frame Streams
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional audio/video synchronous playback devices can only synchronize video data in units of a single frame frequency, making it difficult to synchronize multiple video streams with different frame frequencies simultaneously.
Innovation Solution
An audio/video synchronous playback device with a video cycle interpolation section that interpolates video data to adjust frame or field intervals, allowing separate synchronization of multiple video streams with different frame frequencies with an audio stream, using decoding sections, time information extraction, and synchronization sections to achieve precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional synchronization methods are used, then a single video stream can be synchronized with audio, but multiple video streams with different frame frequencies cannot be simultaneously synchronized
Solution Approach 1:
The synchronization system is divided into multiple independent synchronization sections (first synchronization section 108, second synchronization section 110), each dedicated to synchronizing a specific video stream with audio. This segmentation allows each section to handle one video stream independently, enabling support for multiple different frame frequencies while maintaining manageable complexity through modular design.
2Measurement precision
If video data is synchronized in units of a single frame frequency, then synchronization is simple, but precision is insufficient for multiple video streams with different frame frequencies
Solution Approach 1:
Each synchronization section is configured with specific parameters tailored to its assigned video stream's frame frequency (e.g., first video output 24Hz, second video output 59.94Hz). This local optimization allows each section to achieve high synchronization precision for its specific frequency while the overall system handles multiple frequencies through this differentiated approach.
3Adaptability or versatility
If a video cycle interpolation section is added to enable multiple frame frequencies, then adaptability improves, but device complexity increases
Solution Approach 1:
The video cycle interpolation section (109) acts as an intermediary component between the video decoding and synchronization process. It receives video data and adjusts the frame/field intervals to match the required output frequency, enabling the system to generate multiple different frame frequencies from a single input stream without requiring multiple independent decoding paths.
Data Source
AI summary
An audio/video synchronous playback device includes a first synchronization section for repeating or skipping a first video data sequence in units of a video frame interval thereof to synchronize the first video data sequence with an audio data sequence, and a second synchronization section for repeating or skipping a second video data sequence in units of a video frame or video field interval thereof to synchronize the second video data sequence with the audio data sequence. A first video data sequence output and a second video data sequence output having different frame frequencies are separately synchronized with one channel of audio data sequence output with their respective precisions.